Merge pull request #3666 from bunnei/new-vmm

Implement a new virtual memory manager

externals/dynarmic

@@ -1 +1 @@
-Subproject commit f6ae9e1c3311b747b7b91fd903c62bf40b3b9c88
+Subproject commit 57b987c185ae6677861cbf781f08ed1649b0543e

src/audio_core/audio_renderer.cpp

@@ -36,9 +36,9 @@ public:
     }
 
     void SetWaveIndex(std::size_t index);
-    std::vector<s16> DequeueSamples(std::size_t sample_count, Memory::Memory& memory);
+    std::vector<s16> DequeueSamples(std::size_t sample_count, Core::Memory::Memory& memory);
     void UpdateState();
-    void RefreshBuffer(Memory::Memory& memory);
+    void RefreshBuffer(Core::Memory::Memory& memory);
 
 private:
     bool is_in_use{};
@@ -66,13 +66,14 @@ public:
         return info;
     }
 
-    void UpdateState(Memory::Memory& memory);
+    void UpdateState(Core::Memory::Memory& memory);
 
 private:
     EffectOutStatus out_status{};
     EffectInStatus info{};
 };
-AudioRenderer::AudioRenderer(Core::Timing::CoreTiming& core_timing, Memory::Memory& memory_,
+
+AudioRenderer::AudioRenderer(Core::Timing::CoreTiming& core_timing, Core::Memory::Memory& memory_,
                              AudioRendererParameter params,
                              std::shared_ptr<Kernel::WritableEvent> buffer_event,
                              std::size_t instance_number)
@@ -208,7 +209,7 @@ void AudioRenderer::VoiceState::SetWaveIndex(std::size_t index) {
 }
 
 std::vector<s16> AudioRenderer::VoiceState::DequeueSamples(std::size_t sample_count,
-                                                           Memory::Memory& memory) {
+                                                           Core::Memory::Memory& memory) {
     if (!IsPlaying()) {
         return {};
     }
@@ -258,7 +259,7 @@ void AudioRenderer::VoiceState::UpdateState() {
     is_in_use = info.is_in_use;
 }
 
-void AudioRenderer::VoiceState::RefreshBuffer(Memory::Memory& memory) {
+void AudioRenderer::VoiceState::RefreshBuffer(Core::Memory::Memory& memory) {
     const auto wave_buffer_address = info.wave_buffer[wave_index].buffer_addr;
     const auto wave_buffer_size = info.wave_buffer[wave_index].buffer_sz;
     std::vector<s16> new_samples(wave_buffer_size / sizeof(s16));
@@ -310,7 +311,7 @@ void AudioRenderer::VoiceState::RefreshBuffer(Memory::Memory& memory) {
     is_refresh_pending = false;
 }
 
-void AudioRenderer::EffectState::UpdateState(Memory::Memory& memory) {
+void AudioRenderer::EffectState::UpdateState(Core::Memory::Memory& memory) {
     if (info.is_new) {
         out_status.state = EffectStatus::New;
     } else {

src/audio_core/audio_renderer.h

@@ -22,7 +22,7 @@ namespace Kernel {
 class WritableEvent;
 }
 
-namespace Memory {
+namespace Core::Memory {
 class Memory;
 }
 
@@ -221,7 +221,7 @@ static_assert(sizeof(UpdateDataHeader) == 0x40, "UpdateDataHeader has wrong size
 
 class AudioRenderer {
 public:
-    AudioRenderer(Core::Timing::CoreTiming& core_timing, Memory::Memory& memory_,
+    AudioRenderer(Core::Timing::CoreTiming& core_timing, Core::Memory::Memory& memory_,
                   AudioRendererParameter params,
                   std::shared_ptr<Kernel::WritableEvent> buffer_event, std::size_t instance_number);
     ~AudioRenderer();
@@ -244,7 +244,7 @@ private:
     std::vector<EffectState> effects;
     std::unique_ptr<AudioOut> audio_out;
     StreamPtr stream;
-    Memory::Memory& memory;
+    Core::Memory::Memory& memory;
 };
 
 } // namespace AudioCore

src/common/CMakeLists.txt

@@ -155,6 +155,8 @@ add_library(common STATIC
     uuid.cpp
     uuid.h
     vector_math.h
+    virtual_buffer.cpp
+    virtual_buffer.h
     web_result.h
     zstd_compression.cpp
     zstd_compression.h

src/common/alignment.h

@@ -38,6 +38,13 @@ constexpr bool IsWordAligned(T value) {
     return (value & 0b11) == 0;
 }
 
+template <typename T>
+constexpr bool IsAligned(T value, std::size_t alignment) {
+    using U = typename std::make_unsigned<T>::type;
+    const U mask = static_cast<U>(alignment - 1);
+    return (value & mask) == 0;
+}
+
 template <typename T, std::size_t Align = 16>
 class AlignmentAllocator {
 public:

src/common/common_funcs.h

@@ -55,6 +55,38 @@ __declspec(dllimport) void __stdcall DebugBreak(void);
 // Defined in Misc.cpp.
 std::string GetLastErrorMsg();
 
+#define DECLARE_ENUM_FLAG_OPERATORS(type)                                                          \
+    constexpr type operator|(type a, type b) noexcept {                                            \
+        using T = std::underlying_type_t<type>;                                                    \
+        return static_cast<type>(static_cast<T>(a) | static_cast<T>(b));                           \
+    }                                                                                              \
+    constexpr type operator&(type a, type b) noexcept {                                            \
+        using T = std::underlying_type_t<type>;                                                    \
+        return static_cast<type>(static_cast<T>(a) & static_cast<T>(b));                           \
+    }                                                                                              \
+    constexpr type& operator|=(type& a, type b) noexcept {                                         \
+        using T = std::underlying_type_t<type>;                                                    \
+        a = static_cast<type>(static_cast<T>(a) | static_cast<T>(b));                              \
+        return a;                                                                                  \
+    }                                                                                              \
+    constexpr type& operator&=(type& a, type b) noexcept {                                         \
+        using T = std::underlying_type_t<type>;                                                    \
+        a = static_cast<type>(static_cast<T>(a) & static_cast<T>(b));                              \
+        return a;                                                                                  \
+    }                                                                                              \
+    constexpr type operator~(type key) noexcept {                                                  \
+        using T = std::underlying_type_t<type>;                                                    \
+        return static_cast<type>(~static_cast<T>(key));                                            \
+    }                                                                                              \
+    constexpr bool True(type key) noexcept {                                                       \
+        using T = std::underlying_type_t<type>;                                                    \
+        return static_cast<T>(key) != 0;                                                           \
+    }                                                                                              \
+    constexpr bool False(type key) noexcept {                                                      \
+        using T = std::underlying_type_t<type>;                                                    \
+        return static_cast<T>(key) == 0;                                                           \
+    }
+
 namespace Common {
 
 constexpr u32 MakeMagic(char a, char b, char c, char d) {

src/common/page_table.cpp

@@ -6,36 +6,20 @@
 
 namespace Common {
 
-PageTable::PageTable(std::size_t page_size_in_bits) : page_size_in_bits{page_size_in_bits} {}
+PageTable::PageTable() = default;
 
 PageTable::~PageTable() = default;
 
-void PageTable::Resize(std::size_t address_space_width_in_bits) {
-    const std::size_t num_page_table_entries = 1ULL
-                                               << (address_space_width_in_bits - page_size_in_bits);
-
+void PageTable::Resize(std::size_t address_space_width_in_bits, std::size_t page_size_in_bits,
+                       bool has_attribute) {
+    const std::size_t num_page_table_entries{1ULL
+                                             << (address_space_width_in_bits - page_size_in_bits)};
     pointers.resize(num_page_table_entries);
-    attributes.resize(num_page_table_entries);
-
-    // The default is a 39-bit address space, which causes an initial 1GB allocation size. If the
-    // vector size is subsequently decreased (via resize), the vector might not automatically
-    // actually reallocate/resize its underlying allocation, which wastes up to ~800 MB for
-    // 36-bit titles. Call shrink_to_fit to reduce capacity to what's actually in use.
-
-    pointers.shrink_to_fit();
-    attributes.shrink_to_fit();
-}
-
-BackingPageTable::BackingPageTable(std::size_t page_size_in_bits) : PageTable{page_size_in_bits} {}
-
-BackingPageTable::~BackingPageTable() = default;
-
-void BackingPageTable::Resize(std::size_t address_space_width_in_bits) {
-    PageTable::Resize(address_space_width_in_bits);
-    const std::size_t num_page_table_entries = 1ULL
-                                               << (address_space_width_in_bits - page_size_in_bits);
     backing_addr.resize(num_page_table_entries);
-    backing_addr.shrink_to_fit();
+
+    if (has_attribute) {
+        attributes.resize(num_page_table_entries);
+    }
 }
 
 } // namespace Common

src/common/page_table.h

@@ -5,9 +5,12 @@
 #pragma once
 
 #include <vector>
+
 #include <boost/icl/interval_map.hpp>
+
 #include "common/common_types.h"
 #include "common/memory_hook.h"
+#include "common/virtual_buffer.h"
 
 namespace Common {
 
@@ -47,7 +50,7 @@ struct SpecialRegion {
  * mimics the way a real CPU page table works.
  */
 struct PageTable {
-    explicit PageTable(std::size_t page_size_in_bits);
+    PageTable();
     ~PageTable();
 
     /**
@@ -56,40 +59,18 @@ struct PageTable {
      *
      * @param address_space_width_in_bits The address size width in bits.
      */
-    void Resize(std::size_t address_space_width_in_bits);
+    void Resize(std::size_t address_space_width_in_bits, std::size_t page_size_in_bits,
+                bool has_attribute);
 
     /**
      * Vector of memory pointers backing each page. An entry can only be non-null if the
      * corresponding entry in the `attributes` vector is of type `Memory`.
      */
-    std::vector<u8*> pointers;
+    VirtualBuffer<u8*> pointers;
 
-    /**
-     * Contains MMIO handlers that back memory regions whose entries in the `attribute` vector is
-     * of type `Special`.
-     */
-    boost::icl::interval_map<u64, std::set<SpecialRegion>> special_regions;
+    VirtualBuffer<u64> backing_addr;
 
-    /**
-     * Vector of fine grained page attributes. If it is set to any value other than `Memory`, then
-     * the corresponding entry in `pointers` MUST be set to null.
-     */
-    std::vector<PageType> attributes;
-
-    const std::size_t page_size_in_bits{};
-};
-
-/**
- * A more advanced Page Table with the ability to save a backing address when using it
- * depends on another MMU.
- */
-struct BackingPageTable : PageTable {
-    explicit BackingPageTable(std::size_t page_size_in_bits);
-    ~BackingPageTable();
-
-    void Resize(std::size_t address_space_width_in_bits);
-
-    std::vector<u64> backing_addr;
+    VirtualBuffer<PageType> attributes;
 };
 
 } // namespace Common

src/common/scope_exit.h

@@ -12,10 +12,17 @@ template <typename Func>
 struct ScopeExitHelper {
     explicit ScopeExitHelper(Func&& func) : func(std::move(func)) {}
     ~ScopeExitHelper() {
+        if (active) {
             func();
         }
+    }
+
+    void Cancel() {
+        active = false;
+    }
 
     Func func;
+    bool active{true};
 };
 
 template <typename Func>

src/common/virtual_buffer.cpp

@@ -0,0 +1,52 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#ifdef _WIN32
+#include <windows.h>
+#else
+#include <stdio.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#if defined __APPLE__ || defined __FreeBSD__ || defined __OpenBSD__
+#include <sys/sysctl.h>
+#elif defined __HAIKU__
+#include <OS.h>
+#else
+#include <sys/sysinfo.h>
+#endif
+#endif
+
+#include "common/assert.h"
+#include "common/virtual_buffer.h"
+
+namespace Common {
+
+void* AllocateMemoryPages(std::size_t size) {
+#ifdef _WIN32
+    void* base{VirtualAlloc(nullptr, size, MEM_COMMIT, PAGE_READWRITE)};
+#else
+    void* base{mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0)};
+
+    if (base == MAP_FAILED) {
+        base = nullptr;
+    }
+#endif
+
+    ASSERT(base);
+
+    return base;
+}
+
+void FreeMemoryPages(void* base, std::size_t size) {
+    if (!base) {
+        return;
+    }
+#ifdef _WIN32
+    ASSERT(VirtualFree(base, 0, MEM_RELEASE));
+#else
+    ASSERT(munmap(base, size) == 0);
+#endif
+}
+
+} // namespace Common

src/common/virtual_buffer.h

@@ -0,0 +1,58 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_funcs.h"
+
+namespace Common {
+
+void* AllocateMemoryPages(std::size_t size);
+void FreeMemoryPages(void* base, std::size_t size);
+
+template <typename T>
+class VirtualBuffer final : NonCopyable {
+public:
+    constexpr VirtualBuffer() = default;
+    explicit VirtualBuffer(std::size_t count) : alloc_size{count * sizeof(T)} {
+        base_ptr = reinterpret_cast<T*>(AllocateMemoryPages(alloc_size));
+    }
+
+    ~VirtualBuffer() {
+        FreeMemoryPages(base_ptr, alloc_size);
+    }
+
+    void resize(std::size_t count) {
+        FreeMemoryPages(base_ptr, alloc_size);
+
+        alloc_size = count * sizeof(T);
+        base_ptr = reinterpret_cast<T*>(AllocateMemoryPages(alloc_size));
+    }
+
+    constexpr const T& operator[](std::size_t index) const {
+        return base_ptr[index];
+    }
+
+    constexpr T& operator[](std::size_t index) {
+        return base_ptr[index];
+    }
+
+    constexpr T* data() {
+        return base_ptr;
+    }
+
+    constexpr const T* data() const {
+        return base_ptr;
+    }
+
+    constexpr std::size_t size() const {
+        return alloc_size / sizeof(T);
+    }
+
+private:
+    std::size_t alloc_size{};
+    T* base_ptr{};
+};
+
+} // namespace Common

src/core/CMakeLists.txt

@@ -35,6 +35,8 @@ add_library(core STATIC
     crypto/ctr_encryption_layer.h
     crypto/xts_encryption_layer.cpp
     crypto/xts_encryption_layer.h
+    device_memory.cpp
+    device_memory.h
     file_sys/bis_factory.cpp
     file_sys/bis_factory.h
     file_sys/card_image.cpp
@@ -152,6 +154,23 @@ add_library(core STATIC
     hle/kernel/hle_ipc.h
     hle/kernel/kernel.cpp
     hle/kernel/kernel.h
+    hle/kernel/memory/address_space_info.cpp
+    hle/kernel/memory/address_space_info.h
+    hle/kernel/memory/memory_block.h
+    hle/kernel/memory/memory_block_manager.cpp
+    hle/kernel/memory/memory_block_manager.h
+    hle/kernel/memory/memory_layout.h
+    hle/kernel/memory/memory_manager.cpp
+    hle/kernel/memory/memory_manager.h
+    hle/kernel/memory/memory_types.h
+    hle/kernel/memory/page_linked_list.h
+    hle/kernel/memory/page_heap.cpp
+    hle/kernel/memory/page_heap.h
+    hle/kernel/memory/page_table.cpp
+    hle/kernel/memory/page_table.h
+    hle/kernel/memory/slab_heap.h
+    hle/kernel/memory/system_control.cpp
+    hle/kernel/memory/system_control.h
     hle/kernel/mutex.cpp
     hle/kernel/mutex.h
     hle/kernel/object.cpp
@@ -178,6 +197,7 @@ add_library(core STATIC
     hle/kernel/shared_memory.h
     hle/kernel/svc.cpp
     hle/kernel/svc.h
+    hle/kernel/svc_types.h
     hle/kernel/svc_wrap.h
     hle/kernel/synchronization_object.cpp
     hle/kernel/synchronization_object.h
@@ -189,8 +209,6 @@ add_library(core STATIC
     hle/kernel/time_manager.h
     hle/kernel/transfer_memory.cpp
     hle/kernel/transfer_memory.h
-    hle/kernel/vm_manager.cpp
-    hle/kernel/vm_manager.h
     hle/kernel/writable_event.cpp
     hle/kernel/writable_event.h
     hle/lock.cpp

src/core/arm/arm_interface.cpp

@@ -60,7 +60,7 @@ static_assert(sizeof(ELFSymbol) == 0x18, "ELFSymbol has incorrect size.");
 
 using Symbols = std::vector<std::pair<ELFSymbol, std::string>>;
 
-Symbols GetSymbols(VAddr text_offset, Memory::Memory& memory) {
+Symbols GetSymbols(VAddr text_offset, Core::Memory::Memory& memory) {
     const auto mod_offset = text_offset + memory.Read32(text_offset + 4);
 
     if (mod_offset < text_offset || (mod_offset & 0b11) != 0 ||

src/core/arm/arm_interface.h

@@ -26,28 +26,28 @@ public:
     virtual ~ARM_Interface() = default;
 
     struct ThreadContext32 {
-        std::array<u32, 16> cpu_registers;
-        u32 cpsr;
-        std::array<u8, 4> padding;
-        std::array<u64, 32> fprs;
-        u32 fpscr;
-        u32 fpexc;
-        u32 tpidr;
+        std::array<u32, 16> cpu_registers{};
+        u32 cpsr{};
+        std::array<u8, 4> padding{};
+        std::array<u64, 32> fprs{};
+        u32 fpscr{};
+        u32 fpexc{};
+        u32 tpidr{};
     };
     // Internally within the kernel, it expects the AArch32 version of the
     // thread context to be 344 bytes in size.
     static_assert(sizeof(ThreadContext32) == 0x158);
 
     struct ThreadContext64 {
-        std::array<u64, 31> cpu_registers;
-        u64 sp;
-        u64 pc;
-        u32 pstate;
-        std::array<u8, 4> padding;
-        std::array<u128, 32> vector_registers;
-        u32 fpcr;
-        u32 fpsr;
-        u64 tpidr;
+        std::array<u64, 31> cpu_registers{};
+        u64 sp{};
+        u64 pc{};
+        u32 pstate{};
+        std::array<u8, 4> padding{};
+        std::array<u128, 32> vector_registers{};
+        u32 fpcr{};
+        u32 fpsr{};
+        u64 tpidr{};
     };
     // Internally within the kernel, it expects the AArch64 version of the
     // thread context to be 800 bytes in size.

src/core/arm/dynarmic/arm_dynarmic_32.cpp

@@ -67,7 +67,7 @@ public:
     }
 
     void CallSVC(u32 swi) override {
-        Kernel::CallSVC(parent.system, swi);
+        Kernel::Svc::Call(parent.system, swi);
     }
 
     void AddTicks(u64 ticks) override {

src/core/arm/dynarmic/arm_dynarmic_32.h

@@ -15,7 +15,7 @@
 #include "core/arm/arm_interface.h"
 #include "core/arm/exclusive_monitor.h"
 
-namespace Memory {
+namespace Core::Memory {
 class Memory;
 }
 

src/core/arm/dynarmic/arm_dynarmic_64.cpp

@@ -8,6 +8,7 @@
 #include <dynarmic/A64/config.h>
 #include "common/logging/log.h"
 #include "common/microprofile.h"
+#include "common/page_table.h"
 #include "core/arm/dynarmic/arm_dynarmic_64.h"
 #include "core/core.h"
 #include "core/core_manager.h"
@@ -18,7 +19,6 @@
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/scheduler.h"
 #include "core/hle/kernel/svc.h"
-#include "core/hle/kernel/vm_manager.h"
 #include "core/memory.h"
 
 namespace Core {
@@ -103,7 +103,7 @@ public:
     }
 
     void CallSVC(u32 swi) override {
-        Kernel::CallSVC(parent.system, swi);
+        Kernel::Svc::Call(parent.system, swi);
     }
 
     void AddTicks(u64 ticks) override {
@@ -159,6 +159,9 @@ std::shared_ptr<Dynarmic::A64::Jit> ARM_Dynarmic_64::MakeJit(Common::PageTable&
     // Unpredictable instructions
     config.define_unpredictable_behaviour = true;
 
+    config.detect_misaligned_access_via_page_table = 16 | 32 | 64 | 128;
+    config.only_detect_misalignment_via_page_table_on_page_boundary = true;
+
     return std::make_shared<Dynarmic::A64::Jit>(config);
 }
 

src/core/arm/dynarmic/arm_dynarmic_64.h

@@ -15,7 +15,7 @@
 #include "core/arm/exclusive_monitor.h"
 #include "core/arm/unicorn/arm_unicorn.h"
 
-namespace Memory {
+namespace Core::Memory {
 class Memory;
 }
 
@@ -92,7 +92,7 @@ public:
 private:
     friend class ARM_Dynarmic_64;
     Dynarmic::A64::ExclusiveMonitor monitor;
-    Memory::Memory& memory;
+    Core::Memory::Memory& memory;
 };
 
 } // namespace Core

src/core/arm/exclusive_monitor.h

@@ -8,7 +8,7 @@
 
 #include "common/common_types.h"
 
-namespace Memory {
+namespace Core::Memory {
 class Memory;
 }
 

src/core/arm/unicorn/arm_unicorn.cpp

@@ -266,7 +266,7 @@ void ARM_Unicorn::InterruptHook(uc_engine* uc, u32 int_no, void* user_data) {
 
     switch (ec) {
     case 0x15: // SVC
-        Kernel::CallSVC(arm_instance->system, iss);
+        Kernel::Svc::Call(arm_instance->system, iss);
         break;
     }
 }

src/core/core.cpp

@@ -14,6 +14,7 @@
 #include "core/core_manager.h"
 #include "core/core_timing.h"
 #include "core/cpu_manager.h"
+#include "core/device_memory.h"
 #include "core/file_sys/bis_factory.h"
 #include "core/file_sys/card_image.h"
 #include "core/file_sys/mode.h"
@@ -140,6 +141,8 @@ struct System::Impl {
     ResultStatus Init(System& system, Frontend::EmuWindow& emu_window) {
         LOG_DEBUG(HW_Memory, "initialized OK");
 
+        device_memory = std::make_unique<Core::DeviceMemory>(system);
+
         core_timing.Initialize();
         kernel.Initialize();
         cpu_manager.Initialize();
@@ -276,6 +279,7 @@ struct System::Impl {
         telemetry_session.reset();
         perf_stats.reset();
         gpu_core.reset();
+        device_memory.reset();
 
         // Close all CPU/threading state
         cpu_manager.Shutdown();
@@ -346,7 +350,8 @@ struct System::Impl {
     std::unique_ptr<Loader::AppLoader> app_loader;
     std::unique_ptr<Tegra::GPU> gpu_core;
     std::unique_ptr<Hardware::InterruptManager> interrupt_manager;
-    Memory::Memory memory;
+    std::unique_ptr<Core::DeviceMemory> device_memory;
+    Core::Memory::Memory memory;
     CpuManager cpu_manager;
     bool is_powered_on = false;
     bool exit_lock = false;
@@ -472,6 +477,14 @@ Kernel::Process* System::CurrentProcess() {
     return impl->kernel.CurrentProcess();
 }
 
+Core::DeviceMemory& System::DeviceMemory() {
+    return *impl->device_memory;
+}
+
+const Core::DeviceMemory& System::DeviceMemory() const {
+    return *impl->device_memory;
+}
+
 const Kernel::Process* System::CurrentProcess() const {
     return impl->kernel.CurrentProcess();
 }
@@ -505,7 +518,7 @@ Memory::Memory& System::Memory() {
     return impl->memory;
 }
 
-const Memory::Memory& System::Memory() const {
+const Core::Memory::Memory& System::Memory() const {
     return impl->memory;
 }
 

src/core/core.h

@@ -36,9 +36,10 @@ class AppLoader;
 enum class ResultStatus : u16;
 } // namespace Loader
 
-namespace Memory {
+namespace Core::Memory {
 struct CheatEntry;
-} // namespace Memory
+class Memory;
+} // namespace Core::Memory
 
 namespace Service {
 
@@ -86,14 +87,11 @@ namespace Core::Hardware {
 class InterruptManager;
 }
 
-namespace Memory {
-class Memory;
-}
-
 namespace Core {
 
 class ARM_Interface;
 class CoreManager;
+class DeviceMemory;
 class ExclusiveMonitor;
 class FrameLimiter;
 class PerfStats;
@@ -230,10 +228,10 @@ public:
     const ExclusiveMonitor& Monitor() const;
 
     /// Gets a mutable reference to the system memory instance.
-    Memory::Memory& Memory();
+    Core::Memory::Memory& Memory();
 
     /// Gets a constant reference to the system memory instance.
-    const Memory::Memory& Memory() const;
+    const Core::Memory::Memory& Memory() const;
 
     /// Gets a mutable reference to the GPU interface
     Tegra::GPU& GPU();
@@ -259,6 +257,12 @@ public:
     /// Gets the global scheduler
     const Kernel::GlobalScheduler& GlobalScheduler() const;
 
+    /// Gets the manager for the guest device memory
+    Core::DeviceMemory& DeviceMemory();
+
+    /// Gets the manager for the guest device memory
+    const Core::DeviceMemory& DeviceMemory() const;
+
     /// Provides a pointer to the current process
     Kernel::Process* CurrentProcess();
 

src/core/core_manager.h

@@ -22,7 +22,7 @@ namespace Core::Timing {
 class CoreTiming;
 }
 
-namespace Memory {
+namespace Core::Memory {
 class Memory;
 }
 

src/core/device_memory.cpp

@@ -0,0 +1,15 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/core.h"
+#include "core/device_memory.h"
+#include "core/memory.h"
+
+namespace Core {
+
+DeviceMemory::DeviceMemory(System& system) : buffer{DramMemoryMap::Size}, system{system} {}
+
+DeviceMemory::~DeviceMemory() = default;
+
+} // namespace Core

src/core/device_memory.h

@@ -0,0 +1,51 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/assert.h"
+#include "common/common_funcs.h"
+#include "common/virtual_buffer.h"
+
+namespace Core {
+
+class System;
+
+namespace DramMemoryMap {
+enum : u64 {
+    Base = 0x80000000ULL,
+    Size = 0x100000000ULL,
+    End = Base + Size,
+    KernelReserveBase = Base + 0x60000,
+    SlabHeapBase = KernelReserveBase + 0x85000,
+    SlapHeapSize = 0xa21000,
+    SlabHeapEnd = SlabHeapBase + SlapHeapSize,
+};
+}; // namespace DramMemoryMap
+
+class DeviceMemory : NonCopyable {
+public:
+    explicit DeviceMemory(Core::System& system);
+    ~DeviceMemory();
+
+    template <typename T>
+    PAddr GetPhysicalAddr(const T* ptr) const {
+        return (reinterpret_cast<uintptr_t>(ptr) - reinterpret_cast<uintptr_t>(buffer.data())) +
+               DramMemoryMap::Base;
+    }
+
+    u8* GetPointer(PAddr addr) {
+        return buffer.data() + (addr - DramMemoryMap::Base);
+    }
+
+    const u8* GetPointer(PAddr addr) const {
+        return buffer.data() + (addr - DramMemoryMap::Base);
+    }
+
+private:
+    Common::VirtualBuffer<u8> buffer;
+    Core::System& system;
+};
+
+} // namespace Core

src/core/file_sys/patch_manager.cpp

@@ -249,7 +249,7 @@ bool PatchManager::HasNSOPatch(const std::array<u8, 32>& build_id_) const {
 }
 
 namespace {
-std::optional<std::vector<Memory::CheatEntry>> ReadCheatFileFromFolder(
+std::optional<std::vector<Core::Memory::CheatEntry>> ReadCheatFileFromFolder(
     const Core::System& system, u64 title_id, const std::array<u8, 0x20>& build_id_,
     const VirtualDir& base_path, bool upper) {
     const auto build_id_raw = Common::HexToString(build_id_, upper);
@@ -269,14 +269,14 @@ std::optional<std::vector<Memory::CheatEntry>> ReadCheatFileFromFolder(
         return std::nullopt;
     }
 
-    Memory::TextCheatParser parser;
+    Core::Memory::TextCheatParser parser;
     return parser.Parse(
         system, std::string_view(reinterpret_cast<const char* const>(data.data()), data.size()));
 }
 
 } // Anonymous namespace
 
-std::vector<Memory::CheatEntry> PatchManager::CreateCheatList(
+std::vector<Core::Memory::CheatEntry> PatchManager::CreateCheatList(
     const Core::System& system, const std::array<u8, 32>& build_id_) const {
     const auto load_dir = system.GetFileSystemController().GetModificationLoadRoot(title_id);
     if (load_dir == nullptr) {
@@ -289,7 +289,7 @@ std::vector<Memory::CheatEntry> PatchManager::CreateCheatList(
     std::sort(patch_dirs.begin(), patch_dirs.end(),
               [](const VirtualDir& l, const VirtualDir& r) { return l->GetName() < r->GetName(); });
 
-    std::vector<Memory::CheatEntry> out;
+    std::vector<Core::Memory::CheatEntry> out;
     for (const auto& subdir : patch_dirs) {
         if (std::find(disabled.cbegin(), disabled.cend(), subdir->GetName()) != disabled.cend()) {
             continue;

src/core/file_sys/patch_manager.h

@@ -51,8 +51,8 @@ public:
     bool HasNSOPatch(const std::array<u8, 0x20>& build_id) const;
 
     // Creates a CheatList object with all
-    std::vector<Memory::CheatEntry> CreateCheatList(const Core::System& system,
-                                                    const std::array<u8, 0x20>& build_id) const;
+    std::vector<Core::Memory::CheatEntry> CreateCheatList(
+        const Core::System& system, const std::array<u8, 0x20>& build_id) const;
 
     // Currently tracked RomFS patches:
     // - Game Updates

src/core/gdbstub/gdbstub.cpp

@@ -37,9 +37,9 @@
 #include "core/core.h"
 #include "core/core_manager.h"
 #include "core/gdbstub/gdbstub.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/scheduler.h"
-#include "core/hle/kernel/vm_manager.h"
 #include "core/loader/loader.h"
 #include "core/memory.h"
 
@@ -643,7 +643,7 @@ static void HandleQuery() {
         SendReply(target_xml);
     } else if (strncmp(query, "Offsets", strlen("Offsets")) == 0) {
         const VAddr base_address =
-            Core::System::GetInstance().CurrentProcess()->VMManager().GetCodeRegionBaseAddress();
+            Core::System::GetInstance().CurrentProcess()->PageTable().GetCodeRegionStart();
         std::string buffer = fmt::format("TextSeg={:0x}", base_address);
         SendReply(buffer.c_str());
     } else if (strncmp(query, "fThreadInfo", strlen("fThreadInfo")) == 0) {

src/core/hle/kernel/client_session.cpp

@@ -47,7 +47,8 @@ ResultVal<std::shared_ptr<ClientSession>> ClientSession::Create(KernelCore& kern
     return MakeResult(std::move(client_session));
 }
 
-ResultCode ClientSession::SendSyncRequest(std::shared_ptr<Thread> thread, Memory::Memory& memory) {
+ResultCode ClientSession::SendSyncRequest(std::shared_ptr<Thread> thread,
+                                          Core::Memory::Memory& memory) {
     // Keep ServerSession alive until we're done working with it.
     if (!parent->Server()) {
         return ERR_SESSION_CLOSED_BY_REMOTE;

src/core/hle/kernel/client_session.h

@@ -12,7 +12,7 @@
 
 union ResultCode;
 
-namespace Memory {
+namespace Core::Memory {
 class Memory;
 }
 
@@ -42,7 +42,7 @@ public:
         return HANDLE_TYPE;
     }
 
-    ResultCode SendSyncRequest(std::shared_ptr<Thread> thread, Memory::Memory& memory);
+    ResultCode SendSyncRequest(std::shared_ptr<Thread> thread, Core::Memory::Memory& memory);
 
     bool ShouldWait(const Thread* thread) const override;
 

src/core/hle/kernel/errors.h

@@ -14,6 +14,7 @@ constexpr ResultCode ERR_MAX_CONNECTIONS_REACHED{ErrorModule::Kernel, 7};
 constexpr ResultCode ERR_INVALID_CAPABILITY_DESCRIPTOR{ErrorModule::Kernel, 14};
 constexpr ResultCode ERR_INVALID_SIZE{ErrorModule::Kernel, 101};
 constexpr ResultCode ERR_INVALID_ADDRESS{ErrorModule::Kernel, 102};
+constexpr ResultCode ERR_OUT_OF_RESOURCES{ErrorModule::Kernel, 103};
 constexpr ResultCode ERR_OUT_OF_MEMORY{ErrorModule::Kernel, 104};
 constexpr ResultCode ERR_HANDLE_TABLE_FULL{ErrorModule::Kernel, 105};
 constexpr ResultCode ERR_INVALID_ADDRESS_STATE{ErrorModule::Kernel, 106};

src/core/hle/kernel/kernel.cpp

@@ -18,15 +18,20 @@
 #include "core/core.h"
 #include "core/core_timing.h"
 #include "core/core_timing_util.h"
+#include "core/device_memory.h"
 #include "core/hardware_properties.h"
 #include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/handle_table.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/memory/memory_layout.h"
+#include "core/hle/kernel/memory/memory_manager.h"
+#include "core/hle/kernel/memory/slab_heap.h"
 #include "core/hle/kernel/physical_core.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/scheduler.h"
+#include "core/hle/kernel/shared_memory.h"
 #include "core/hle/kernel/synchronization.h"
 #include "core/hle/kernel/thread.h"
 #include "core/hle/kernel/time_manager.h"
@@ -110,6 +115,7 @@ struct KernelCore::Impl {
 
         InitializePhysicalCores();
         InitializeSystemResourceLimit(kernel);
+        InitializeMemoryLayout();
         InitializeThreads();
         InitializePreemption();
     }
@@ -154,12 +160,17 @@ struct KernelCore::Impl {
         system_resource_limit = ResourceLimit::Create(kernel);
 
         // If setting the default system values fails, then something seriously wrong has occurred.
-        ASSERT(system_resource_limit->SetLimitValue(ResourceType::PhysicalMemory, 0x200000000)
+        ASSERT(system_resource_limit->SetLimitValue(ResourceType::PhysicalMemory, 0x100000000)
                    .IsSuccess());
         ASSERT(system_resource_limit->SetLimitValue(ResourceType::Threads, 800).IsSuccess());
         ASSERT(system_resource_limit->SetLimitValue(ResourceType::Events, 700).IsSuccess());
         ASSERT(system_resource_limit->SetLimitValue(ResourceType::TransferMemory, 200).IsSuccess());
         ASSERT(system_resource_limit->SetLimitValue(ResourceType::Sessions, 900).IsSuccess());
+
+        if (!system_resource_limit->Reserve(ResourceType::PhysicalMemory, 0) ||
+            !system_resource_limit->Reserve(ResourceType::PhysicalMemory, 0x60000)) {
+            UNREACHABLE();
+        }
     }
 
     void InitializeThreads() {
@@ -237,6 +248,57 @@ struct KernelCore::Impl {
         return result;
     }
 
+    void InitializeMemoryLayout() {
+        // Initialize memory layout
+        constexpr Memory::MemoryLayout layout{Memory::MemoryLayout::GetDefaultLayout()};
+        constexpr std::size_t hid_size{0x40000};
+        constexpr std::size_t font_size{0x1100000};
+        constexpr std::size_t irs_size{0x8000};
+        constexpr std::size_t time_size{0x1000};
+        constexpr PAddr hid_addr{layout.System().StartAddress()};
+        constexpr PAddr font_pa{layout.System().StartAddress() + hid_size};
+        constexpr PAddr irs_addr{layout.System().StartAddress() + hid_size + font_size};
+        constexpr PAddr time_addr{layout.System().StartAddress() + hid_size + font_size + irs_size};
+
+        // Initialize memory manager
+        memory_manager = std::make_unique<Memory::MemoryManager>();
+        memory_manager->InitializeManager(Memory::MemoryManager::Pool::Application,
+                                          layout.Application().StartAddress(),
+                                          layout.Application().EndAddress());
+        memory_manager->InitializeManager(Memory::MemoryManager::Pool::Applet,
+                                          layout.Applet().StartAddress(),
+                                          layout.Applet().EndAddress());
+        memory_manager->InitializeManager(Memory::MemoryManager::Pool::System,
+                                          layout.System().StartAddress(),
+                                          layout.System().EndAddress());
+
+        hid_shared_mem = Kernel::SharedMemory::Create(
+            system.Kernel(), system.DeviceMemory(), nullptr,
+            {hid_addr, hid_size / Memory::PageSize}, Memory::MemoryPermission::None,
+            Memory::MemoryPermission::Read, hid_addr, hid_size, "HID:SharedMemory");
+        font_shared_mem = Kernel::SharedMemory::Create(
+            system.Kernel(), system.DeviceMemory(), nullptr,
+            {font_pa, font_size / Memory::PageSize}, Memory::MemoryPermission::None,
+            Memory::MemoryPermission::Read, font_pa, font_size, "Font:SharedMemory");
+        irs_shared_mem = Kernel::SharedMemory::Create(
+            system.Kernel(), system.DeviceMemory(), nullptr,
+            {irs_addr, irs_size / Memory::PageSize}, Memory::MemoryPermission::None,
+            Memory::MemoryPermission::Read, irs_addr, irs_size, "IRS:SharedMemory");
+        time_shared_mem = Kernel::SharedMemory::Create(
+            system.Kernel(), system.DeviceMemory(), nullptr,
+            {time_addr, time_size / Memory::PageSize}, Memory::MemoryPermission::None,
+            Memory::MemoryPermission::Read, time_addr, time_size, "Time:SharedMemory");
+
+        // Allocate slab heaps
+        user_slab_heap_pages = std::make_unique<Memory::SlabHeap<Memory::Page>>();
+
+        // Initialize slab heaps
+        constexpr u64 user_slab_heap_size{0x3de000};
+        user_slab_heap_pages->Initialize(
+            system.DeviceMemory().GetPointer(Core::DramMemoryMap::SlabHeapBase),
+            user_slab_heap_size);
+    }
+
     std::atomic<u32> next_object_id{0};
     std::atomic<u64> next_kernel_process_id{Process::InitialKIPIDMin};
     std::atomic<u64> next_user_process_id{Process::ProcessIDMin};
@@ -271,6 +333,16 @@ struct KernelCore::Impl {
     std::bitset<Core::Hardware::NUM_CPU_CORES> registered_core_threads;
     std::mutex register_thread_mutex;
 
+    // Kernel memory management
+    std::unique_ptr<Memory::MemoryManager> memory_manager;
+    std::unique_ptr<Memory::SlabHeap<Memory::Page>> user_slab_heap_pages;
+
+    // Shared memory for services
+    std::shared_ptr<Kernel::SharedMemory> hid_shared_mem;
+    std::shared_ptr<Kernel::SharedMemory> font_shared_mem;
+    std::shared_ptr<Kernel::SharedMemory> irs_shared_mem;
+    std::shared_ptr<Kernel::SharedMemory> time_shared_mem;
+
     // System context
     Core::System& system;
 };
@@ -437,4 +509,52 @@ Core::EmuThreadHandle KernelCore::GetCurrentEmuThreadID() const {
     return impl->GetCurrentEmuThreadID();
 }
 
+Memory::MemoryManager& KernelCore::MemoryManager() {
+    return *impl->memory_manager;
+}
+
+const Memory::MemoryManager& KernelCore::MemoryManager() const {
+    return *impl->memory_manager;
+}
+
+Memory::SlabHeap<Memory::Page>& KernelCore::GetUserSlabHeapPages() {
+    return *impl->user_slab_heap_pages;
+}
+
+const Memory::SlabHeap<Memory::Page>& KernelCore::GetUserSlabHeapPages() const {
+    return *impl->user_slab_heap_pages;
+}
+
+Kernel::SharedMemory& KernelCore::GetHidSharedMem() {
+    return *impl->hid_shared_mem;
+}
+
+const Kernel::SharedMemory& KernelCore::GetHidSharedMem() const {
+    return *impl->hid_shared_mem;
+}
+
+Kernel::SharedMemory& KernelCore::GetFontSharedMem() {
+    return *impl->font_shared_mem;
+}
+
+const Kernel::SharedMemory& KernelCore::GetFontSharedMem() const {
+    return *impl->font_shared_mem;
+}
+
+Kernel::SharedMemory& KernelCore::GetIrsSharedMem() {
+    return *impl->irs_shared_mem;
+}
+
+const Kernel::SharedMemory& KernelCore::GetIrsSharedMem() const {
+    return *impl->irs_shared_mem;
+}
+
+Kernel::SharedMemory& KernelCore::GetTimeSharedMem() {
+    return *impl->time_shared_mem;
+}
+
+const Kernel::SharedMemory& KernelCore::GetTimeSharedMem() const {
+    return *impl->time_shared_mem;
+}
+
 } // namespace Kernel

src/core/hle/kernel/kernel.h

@@ -8,6 +8,7 @@
 #include <string>
 #include <unordered_map>
 #include <vector>
+#include "core/hle/kernel/memory/memory_types.h"
 #include "core/hle/kernel/object.h"
 
 namespace Core {
@@ -23,6 +24,12 @@ struct EventType;
 
 namespace Kernel {
 
+namespace Memory {
+class MemoryManager;
+template <typename T>
+class SlabHeap;
+} // namespace Memory
+
 class AddressArbiter;
 class ClientPort;
 class GlobalScheduler;
@@ -31,6 +38,7 @@ class PhysicalCore;
 class Process;
 class ResourceLimit;
 class Scheduler;
+class SharedMemory;
 class Synchronization;
 class Thread;
 class TimeManager;
@@ -147,6 +155,42 @@ public:
     /// Register the current thread as a non CPU core thread.
     void RegisterHostThread();
 
+    /// Gets the virtual memory manager for the kernel.
+    Memory::MemoryManager& MemoryManager();
+
+    /// Gets the virtual memory manager for the kernel.
+    const Memory::MemoryManager& MemoryManager() const;
+
+    /// Gets the slab heap allocated for user space pages.
+    Memory::SlabHeap<Memory::Page>& GetUserSlabHeapPages();
+
+    /// Gets the slab heap allocated for user space pages.
+    const Memory::SlabHeap<Memory::Page>& GetUserSlabHeapPages() const;
+
+    /// Gets the shared memory object for HID services.
+    Kernel::SharedMemory& GetHidSharedMem();
+
+    /// Gets the shared memory object for HID services.
+    const Kernel::SharedMemory& GetHidSharedMem() const;
+
+    /// Gets the shared memory object for font services.
+    Kernel::SharedMemory& GetFontSharedMem();
+
+    /// Gets the shared memory object for font services.
+    const Kernel::SharedMemory& GetFontSharedMem() const;
+
+    /// Gets the shared memory object for IRS services.
+    Kernel::SharedMemory& GetIrsSharedMem();
+
+    /// Gets the shared memory object for IRS services.
+    const Kernel::SharedMemory& GetIrsSharedMem() const;
+
+    /// Gets the shared memory object for Time services.
+    Kernel::SharedMemory& GetTimeSharedMem();
+
+    /// Gets the shared memory object for Time services.
+    const Kernel::SharedMemory& GetTimeSharedMem() const;
+
 private:
     friend class Object;
     friend class Process;

src/core/hle/kernel/memory/address_space_info.cpp

@@ -0,0 +1,118 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphère, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphère-NX.
+
+#include <array>
+
+#include "common/assert.h"
+#include "core/hle/kernel/memory/address_space_info.h"
+
+namespace Kernel::Memory {
+
+namespace {
+
+enum : u64 {
+    Size_1_MB = 0x100000,
+    Size_2_MB = 2 * Size_1_MB,
+    Size_128_MB = 128 * Size_1_MB,
+    Size_1_GB = 0x40000000,
+    Size_2_GB = 2 * Size_1_GB,
+    Size_4_GB = 4 * Size_1_GB,
+    Size_6_GB = 6 * Size_1_GB,
+    Size_64_GB = 64 * Size_1_GB,
+    Size_512_GB = 512 * Size_1_GB,
+    Invalid = std::numeric_limits<u64>::max(),
+};
+
+// clang-format off
+constexpr std::array<AddressSpaceInfo, 13> AddressSpaceInfos{{
+   { 32 /*bit_width*/, Size_2_MB   /*addr*/, Size_1_GB   - Size_2_MB   /*size*/, AddressSpaceInfo::Type::Is32Bit,    },
+   { 32 /*bit_width*/, Size_1_GB   /*addr*/, Size_4_GB   - Size_1_GB   /*size*/, AddressSpaceInfo::Type::Small64Bit, },
+   { 32 /*bit_width*/, Invalid     /*addr*/, Size_1_GB                 /*size*/, AddressSpaceInfo::Type::Heap,       },
+   { 32 /*bit_width*/, Invalid     /*addr*/, Size_1_GB                 /*size*/, AddressSpaceInfo::Type::Alias,      },
+   { 36 /*bit_width*/, Size_128_MB /*addr*/, Size_2_GB   - Size_128_MB /*size*/, AddressSpaceInfo::Type::Is32Bit,    },
+   { 36 /*bit_width*/, Size_2_GB   /*addr*/, Size_64_GB  - Size_2_GB   /*size*/, AddressSpaceInfo::Type::Small64Bit, },
+   { 36 /*bit_width*/, Invalid     /*addr*/, Size_6_GB                 /*size*/, AddressSpaceInfo::Type::Heap,       },
+   { 36 /*bit_width*/, Invalid     /*addr*/, Size_6_GB                 /*size*/, AddressSpaceInfo::Type::Alias,      },
+   { 39 /*bit_width*/, Size_128_MB /*addr*/, Size_512_GB - Size_128_MB /*size*/, AddressSpaceInfo::Type::Large64Bit, },
+   { 39 /*bit_width*/, Invalid     /*addr*/, Size_64_GB                /*size*/, AddressSpaceInfo::Type::Is32Bit     },
+   { 39 /*bit_width*/, Invalid     /*addr*/, Size_6_GB                 /*size*/, AddressSpaceInfo::Type::Heap,       },
+   { 39 /*bit_width*/, Invalid     /*addr*/, Size_64_GB                /*size*/, AddressSpaceInfo::Type::Alias,      },
+   { 39 /*bit_width*/, Invalid     /*addr*/, Size_2_GB                 /*size*/, AddressSpaceInfo::Type::Stack,      },
+}};
+// clang-format on
+
+constexpr bool IsAllowedIndexForAddress(std::size_t index) {
+    return index < std::size(AddressSpaceInfos) && AddressSpaceInfos[index].GetAddress() != Invalid;
+}
+
+constexpr std::size_t
+    AddressSpaceIndices32Bit[static_cast<std::size_t>(AddressSpaceInfo::Type::Count)]{
+        0, 1, 0, 2, 0, 3,
+    };
+
+constexpr std::size_t
+    AddressSpaceIndices36Bit[static_cast<std::size_t>(AddressSpaceInfo::Type::Count)]{
+        4, 5, 4, 6, 4, 7,
+    };
+
+constexpr std::size_t
+    AddressSpaceIndices39Bit[static_cast<std::size_t>(AddressSpaceInfo::Type::Count)]{
+        9, 8, 8, 10, 12, 11,
+    };
+
+constexpr bool IsAllowed32BitType(AddressSpaceInfo::Type type) {
+    return type < AddressSpaceInfo::Type::Count && type != AddressSpaceInfo::Type::Large64Bit &&
+           type != AddressSpaceInfo::Type::Stack;
+}
+
+constexpr bool IsAllowed36BitType(AddressSpaceInfo::Type type) {
+    return type < AddressSpaceInfo::Type::Count && type != AddressSpaceInfo::Type::Large64Bit &&
+           type != AddressSpaceInfo::Type::Stack;
+}
+
+constexpr bool IsAllowed39BitType(AddressSpaceInfo::Type type) {
+    return type < AddressSpaceInfo::Type::Count && type != AddressSpaceInfo::Type::Small64Bit;
+}
+
+} // namespace
+
+u64 AddressSpaceInfo::GetAddressSpaceStart(std::size_t width, AddressSpaceInfo::Type type) {
+    const std::size_t index{static_cast<std::size_t>(type)};
+    switch (width) {
+    case 32:
+        ASSERT(IsAllowed32BitType(type));
+        ASSERT(IsAllowedIndexForAddress(AddressSpaceIndices32Bit[index]));
+        return AddressSpaceInfos[AddressSpaceIndices32Bit[index]].GetAddress();
+    case 36:
+        ASSERT(IsAllowed36BitType(type));
+        ASSERT(IsAllowedIndexForAddress(AddressSpaceIndices36Bit[index]));
+        return AddressSpaceInfos[AddressSpaceIndices36Bit[index]].GetAddress();
+    case 39:
+        ASSERT(IsAllowed39BitType(type));
+        ASSERT(IsAllowedIndexForAddress(AddressSpaceIndices39Bit[index]));
+        return AddressSpaceInfos[AddressSpaceIndices39Bit[index]].GetAddress();
+    }
+    UNREACHABLE();
+}
+
+std::size_t AddressSpaceInfo::GetAddressSpaceSize(std::size_t width, AddressSpaceInfo::Type type) {
+    const std::size_t index{static_cast<std::size_t>(type)};
+    switch (width) {
+    case 32:
+        ASSERT(IsAllowed32BitType(type));
+        return AddressSpaceInfos[AddressSpaceIndices32Bit[index]].GetSize();
+    case 36:
+        ASSERT(IsAllowed36BitType(type));
+        return AddressSpaceInfos[AddressSpaceIndices36Bit[index]].GetSize();
+    case 39:
+        ASSERT(IsAllowed39BitType(type));
+        return AddressSpaceInfos[AddressSpaceIndices39Bit[index]].GetSize();
+    }
+    UNREACHABLE();
+}
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/address_space_info.h

@@ -0,0 +1,54 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphère, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphère-NX.
+
+#pragma once
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+
+namespace Kernel::Memory {
+
+class AddressSpaceInfo final : NonCopyable {
+public:
+    enum class Type : u32 {
+        Is32Bit = 0,
+        Small64Bit = 1,
+        Large64Bit = 2,
+        Heap = 3,
+        Stack = 4,
+        Alias = 5,
+        Count,
+    };
+
+private:
+    std::size_t bit_width{};
+    std::size_t addr{};
+    std::size_t size{};
+    Type type{};
+
+public:
+    static u64 GetAddressSpaceStart(std::size_t width, Type type);
+    static std::size_t GetAddressSpaceSize(std::size_t width, Type type);
+
+    constexpr AddressSpaceInfo(std::size_t bit_width, std::size_t addr, std::size_t size, Type type)
+        : bit_width{bit_width}, addr{addr}, size{size}, type{type} {}
+
+    constexpr std::size_t GetWidth() const {
+        return bit_width;
+    }
+    constexpr std::size_t GetAddress() const {
+        return addr;
+    }
+    constexpr std::size_t GetSize() const {
+        return size;
+    }
+    constexpr Type GetType() const {
+        return type;
+    }
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_block.h

@@ -0,0 +1,318 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphère, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphère-NX.
+
+#pragma once
+
+#include "common/alignment.h"
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "core/hle/kernel/memory/memory_types.h"
+#include "core/hle/kernel/svc_types.h"
+
+namespace Kernel::Memory {
+
+enum class MemoryState : u32 {
+    None = 0,
+    Mask = 0xFFFFFFFF, // TODO(bunnei): This should probable be 0xFF
+    All = ~None,
+
+    FlagCanReprotect = (1 << 8),
+    FlagCanDebug = (1 << 9),
+    FlagCanUseIpc = (1 << 10),
+    FlagCanUseNonDeviceIpc = (1 << 11),
+    FlagCanUseNonSecureIpc = (1 << 12),
+    FlagMapped = (1 << 13),
+    FlagCode = (1 << 14),
+    FlagCanAlias = (1 << 15),
+    FlagCanCodeAlias = (1 << 16),
+    FlagCanTransfer = (1 << 17),
+    FlagCanQueryPhysical = (1 << 18),
+    FlagCanDeviceMap = (1 << 19),
+    FlagCanAlignedDeviceMap = (1 << 20),
+    FlagCanIpcUserBuffer = (1 << 21),
+    FlagReferenceCounted = (1 << 22),
+    FlagCanMapProcess = (1 << 23),
+    FlagCanChangeAttribute = (1 << 24),
+    FlagCanCodeMemory = (1 << 25),
+
+    FlagsData = FlagCanReprotect | FlagCanUseIpc | FlagCanUseNonDeviceIpc | FlagCanUseNonSecureIpc |
+                FlagMapped | FlagCanAlias | FlagCanTransfer | FlagCanQueryPhysical |
+                FlagCanDeviceMap | FlagCanAlignedDeviceMap | FlagCanIpcUserBuffer |
+                FlagReferenceCounted | FlagCanChangeAttribute,
+
+    FlagsCode = FlagCanDebug | FlagCanUseIpc | FlagCanUseNonDeviceIpc | FlagCanUseNonSecureIpc |
+                FlagMapped | FlagCode | FlagCanQueryPhysical | FlagCanDeviceMap |
+                FlagCanAlignedDeviceMap | FlagReferenceCounted,
+
+    FlagsMisc = FlagMapped | FlagReferenceCounted | FlagCanQueryPhysical | FlagCanDeviceMap,
+
+    Free = static_cast<u32>(Svc::MemoryState::Free),
+    Io = static_cast<u32>(Svc::MemoryState::Io) | FlagMapped,
+    Static = static_cast<u32>(Svc::MemoryState::Static) | FlagMapped | FlagCanQueryPhysical,
+    Code = static_cast<u32>(Svc::MemoryState::Code) | FlagsCode | FlagCanMapProcess,
+    CodeData = static_cast<u32>(Svc::MemoryState::CodeData) | FlagsData | FlagCanMapProcess |
+               FlagCanCodeMemory,
+    Shared = static_cast<u32>(Svc::MemoryState::Shared) | FlagMapped | FlagReferenceCounted,
+    Normal = static_cast<u32>(Svc::MemoryState::Normal) | FlagsData | FlagCanCodeMemory,
+
+    AliasCode = static_cast<u32>(Svc::MemoryState::AliasCode) | FlagsCode | FlagCanMapProcess |
+                FlagCanCodeAlias,
+    AliasCodeData = static_cast<u32>(Svc::MemoryState::AliasCodeData) | FlagsData |
+                    FlagCanMapProcess | FlagCanCodeAlias | FlagCanCodeMemory,
+
+    Ipc = static_cast<u32>(Svc::MemoryState::Ipc) | FlagsMisc | FlagCanAlignedDeviceMap |
+          FlagCanUseIpc | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    Stack = static_cast<u32>(Svc::MemoryState::Stack) | FlagsMisc | FlagCanAlignedDeviceMap |
+            FlagCanUseIpc | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    ThreadLocal =
+        static_cast<u32>(Svc::MemoryState::ThreadLocal) | FlagMapped | FlagReferenceCounted,
+
+    Transfered = static_cast<u32>(Svc::MemoryState::Transfered) | FlagsMisc |
+                 FlagCanAlignedDeviceMap | FlagCanChangeAttribute | FlagCanUseIpc |
+                 FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    SharedTransfered = static_cast<u32>(Svc::MemoryState::SharedTransfered) | FlagsMisc |
+                       FlagCanAlignedDeviceMap | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    SharedCode = static_cast<u32>(Svc::MemoryState::SharedCode) | FlagMapped |
+                 FlagReferenceCounted | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    Inaccessible = static_cast<u32>(Svc::MemoryState::Inaccessible),
+
+    NonSecureIpc = static_cast<u32>(Svc::MemoryState::NonSecureIpc) | FlagsMisc |
+                   FlagCanAlignedDeviceMap | FlagCanUseNonSecureIpc | FlagCanUseNonDeviceIpc,
+
+    NonDeviceIpc =
+        static_cast<u32>(Svc::MemoryState::NonDeviceIpc) | FlagsMisc | FlagCanUseNonDeviceIpc,
+
+    Kernel = static_cast<u32>(Svc::MemoryState::Kernel) | FlagMapped,
+
+    GeneratedCode = static_cast<u32>(Svc::MemoryState::GeneratedCode) | FlagMapped |
+                    FlagReferenceCounted | FlagCanDebug,
+    CodeOut = static_cast<u32>(Svc::MemoryState::CodeOut) | FlagMapped | FlagReferenceCounted,
+};
+DECLARE_ENUM_FLAG_OPERATORS(MemoryState);
+
+static_assert(static_cast<u32>(MemoryState::Free) == 0x00000000);
+static_assert(static_cast<u32>(MemoryState::Io) == 0x00002001);
+static_assert(static_cast<u32>(MemoryState::Static) == 0x00042002);
+static_assert(static_cast<u32>(MemoryState::Code) == 0x00DC7E03);
+static_assert(static_cast<u32>(MemoryState::CodeData) == 0x03FEBD04);
+static_assert(static_cast<u32>(MemoryState::Normal) == 0x037EBD05);
+static_assert(static_cast<u32>(MemoryState::Shared) == 0x00402006);
+static_assert(static_cast<u32>(MemoryState::AliasCode) == 0x00DD7E08);
+static_assert(static_cast<u32>(MemoryState::AliasCodeData) == 0x03FFBD09);
+static_assert(static_cast<u32>(MemoryState::Ipc) == 0x005C3C0A);
+static_assert(static_cast<u32>(MemoryState::Stack) == 0x005C3C0B);
+static_assert(static_cast<u32>(MemoryState::ThreadLocal) == 0x0040200C);
+static_assert(static_cast<u32>(MemoryState::Transfered) == 0x015C3C0D);
+static_assert(static_cast<u32>(MemoryState::SharedTransfered) == 0x005C380E);
+static_assert(static_cast<u32>(MemoryState::SharedCode) == 0x0040380F);
+static_assert(static_cast<u32>(MemoryState::Inaccessible) == 0x00000010);
+static_assert(static_cast<u32>(MemoryState::NonSecureIpc) == 0x005C3811);
+static_assert(static_cast<u32>(MemoryState::NonDeviceIpc) == 0x004C2812);
+static_assert(static_cast<u32>(MemoryState::Kernel) == 0x00002013);
+static_assert(static_cast<u32>(MemoryState::GeneratedCode) == 0x00402214);
+static_assert(static_cast<u32>(MemoryState::CodeOut) == 0x00402015);
+
+enum class MemoryPermission : u8 {
+    None = 0,
+    Mask = static_cast<u8>(~None),
+
+    Read = 1 << 0,
+    Write = 1 << 1,
+    Execute = 1 << 2,
+
+    ReadAndWrite = Read | Write,
+    ReadAndExecute = Read | Execute,
+
+    UserMask = static_cast<u8>(Svc::MemoryPermission::Read | Svc::MemoryPermission::Write |
+                               Svc::MemoryPermission::Execute),
+};
+DECLARE_ENUM_FLAG_OPERATORS(MemoryPermission);
+
+enum class MemoryAttribute : u8 {
+    None = 0x00,
+    Mask = 0x7F,
+    All = Mask,
+    DontCareMask = 0x80,
+
+    Locked = static_cast<u8>(Svc::MemoryAttribute::Locked),
+    IpcLocked = static_cast<u8>(Svc::MemoryAttribute::IpcLocked),
+    DeviceShared = static_cast<u8>(Svc::MemoryAttribute::DeviceShared),
+    Uncached = static_cast<u8>(Svc::MemoryAttribute::Uncached),
+
+    IpcAndDeviceMapped = IpcLocked | DeviceShared,
+    LockedAndIpcLocked = Locked | IpcLocked,
+    DeviceSharedAndUncached = DeviceShared | Uncached
+};
+DECLARE_ENUM_FLAG_OPERATORS(MemoryAttribute);
+
+static_assert((static_cast<u8>(MemoryAttribute::Mask) &
+               static_cast<u8>(MemoryAttribute::DontCareMask)) == 0);
+
+struct MemoryInfo {
+    VAddr addr{};
+    std::size_t size{};
+    MemoryState state{};
+    MemoryPermission perm{};
+    MemoryAttribute attribute{};
+    MemoryPermission original_perm{};
+    u16 ipc_lock_count{};
+    u16 device_use_count{};
+
+    constexpr Svc::MemoryInfo GetSvcMemoryInfo() const {
+        return {
+            addr,
+            size,
+            static_cast<Svc::MemoryState>(state & MemoryState::Mask),
+            static_cast<Svc::MemoryAttribute>(attribute & MemoryAttribute::Mask),
+            static_cast<Svc::MemoryPermission>(perm & MemoryPermission::UserMask),
+            ipc_lock_count,
+            device_use_count,
+        };
+    }
+
+    constexpr VAddr GetAddress() const {
+        return addr;
+    }
+    constexpr std::size_t GetSize() const {
+        return size;
+    }
+    constexpr std::size_t GetNumPages() const {
+        return GetSize() / PageSize;
+    }
+    constexpr VAddr GetEndAddress() const {
+        return GetAddress() + GetSize();
+    }
+    constexpr VAddr GetLastAddress() const {
+        return GetEndAddress() - 1;
+    }
+};
+
+class MemoryBlock final {
+    friend class MemoryBlockManager;
+
+private:
+    VAddr addr{};
+    std::size_t num_pages{};
+    MemoryState state{MemoryState::None};
+    u16 ipc_lock_count{};
+    u16 device_use_count{};
+    MemoryPermission perm{MemoryPermission::None};
+    MemoryPermission original_perm{MemoryPermission::None};
+    MemoryAttribute attribute{MemoryAttribute::None};
+
+public:
+    static constexpr int Compare(const MemoryBlock& lhs, const MemoryBlock& rhs) {
+        if (lhs.GetAddress() < rhs.GetAddress()) {
+            return -1;
+        } else if (lhs.GetAddress() <= rhs.GetLastAddress()) {
+            return 0;
+        } else {
+            return 1;
+        }
+    }
+
+public:
+    constexpr MemoryBlock() = default;
+    constexpr MemoryBlock(VAddr addr, std::size_t num_pages, MemoryState state,
+                          MemoryPermission perm, MemoryAttribute attribute)
+        : addr{addr}, num_pages(num_pages), state{state}, perm{perm}, attribute{attribute} {}
+
+    constexpr VAddr GetAddress() const {
+        return addr;
+    }
+
+    constexpr std::size_t GetNumPages() const {
+        return num_pages;
+    }
+
+    constexpr std::size_t GetSize() const {
+        return GetNumPages() * PageSize;
+    }
+
+    constexpr VAddr GetEndAddress() const {
+        return GetAddress() + GetSize();
+    }
+
+    constexpr VAddr GetLastAddress() const {
+        return GetEndAddress() - 1;
+    }
+
+    constexpr MemoryInfo GetMemoryInfo() const {
+        return {
+            GetAddress(), GetSize(),     state,          perm,
+            attribute,    original_perm, ipc_lock_count, device_use_count,
+        };
+    }
+
+private:
+    constexpr bool HasProperties(MemoryState s, MemoryPermission p, MemoryAttribute a) const {
+        constexpr MemoryAttribute AttributeIgnoreMask{MemoryAttribute::DontCareMask |
+                                                      MemoryAttribute::IpcLocked |
+                                                      MemoryAttribute::DeviceShared};
+        return state == s && perm == p &&
+               (attribute | AttributeIgnoreMask) == (a | AttributeIgnoreMask);
+    }
+
+    constexpr bool HasSameProperties(const MemoryBlock& rhs) const {
+        return state == rhs.state && perm == rhs.perm && original_perm == rhs.original_perm &&
+               attribute == rhs.attribute && ipc_lock_count == rhs.ipc_lock_count &&
+               device_use_count == rhs.device_use_count;
+    }
+
+    constexpr bool Contains(VAddr start) const {
+        return GetAddress() <= start && start <= GetEndAddress();
+    }
+
+    constexpr void Add(std::size_t count) {
+        ASSERT(count > 0);
+        ASSERT(GetAddress() + count * PageSize - 1 < GetEndAddress() + count * PageSize - 1);
+
+        num_pages += count;
+    }
+
+    constexpr void Update(MemoryState new_state, MemoryPermission new_perm,
+                          MemoryAttribute new_attribute) {
+        ASSERT(original_perm == MemoryPermission::None);
+        ASSERT((attribute & MemoryAttribute::IpcLocked) == MemoryAttribute::None);
+
+        state = new_state;
+        perm = new_perm;
+
+        // TODO(bunnei): Is this right?
+        attribute = static_cast<MemoryAttribute>(
+            new_attribute /*| (attribute & (MemoryAttribute::IpcLocked | MemoryAttribute::DeviceShared))*/);
+    }
+
+    constexpr MemoryBlock Split(VAddr split_addr) {
+        ASSERT(GetAddress() < split_addr);
+        ASSERT(Contains(split_addr));
+        ASSERT(Common::IsAligned(split_addr, PageSize));
+
+        MemoryBlock block;
+        block.addr = addr;
+        block.num_pages = (split_addr - GetAddress()) / PageSize;
+        block.state = state;
+        block.ipc_lock_count = ipc_lock_count;
+        block.device_use_count = device_use_count;
+        block.perm = perm;
+        block.original_perm = original_perm;
+        block.attribute = attribute;
+
+        addr = split_addr;
+        num_pages -= block.num_pages;
+
+        return block;
+    }
+};
+static_assert(std::is_trivially_destructible<MemoryBlock>::value);
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_block_manager.cpp

@@ -0,0 +1,190 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/hle/kernel/memory/memory_block_manager.h"
+#include "core/hle/kernel/memory/memory_types.h"
+
+namespace Kernel::Memory {
+
+MemoryBlockManager::MemoryBlockManager(VAddr start_addr, VAddr end_addr)
+    : start_addr{start_addr}, end_addr{end_addr} {
+    const u64 num_pages{(end_addr - start_addr) / PageSize};
+    memory_block_tree.emplace_back(start_addr, num_pages, MemoryState::Free, MemoryPermission::None,
+                                   MemoryAttribute::None);
+}
+
+MemoryBlockManager::iterator MemoryBlockManager::FindIterator(VAddr addr) {
+    auto node{memory_block_tree.begin()};
+    while (node != end()) {
+        const VAddr end_addr{node->GetNumPages() * PageSize + node->GetAddress()};
+        if (node->GetAddress() <= addr && end_addr - 1 >= addr) {
+            return node;
+        }
+        node = std::next(node);
+    }
+    return end();
+}
+
+VAddr MemoryBlockManager::FindFreeArea(VAddr region_start, std::size_t region_num_pages,
+                                       std::size_t num_pages, std::size_t align, std::size_t offset,
+                                       std::size_t guard_pages) {
+    if (num_pages == 0) {
+        return {};
+    }
+
+    const VAddr region_end{region_start + region_num_pages * PageSize};
+    const VAddr region_last{region_end - 1};
+    for (auto it{FindIterator(region_start)}; it != memory_block_tree.cend(); it++) {
+        const auto info{it->GetMemoryInfo()};
+        if (region_last < info.GetAddress()) {
+            break;
+        }
+
+        if (info.state != MemoryState::Free) {
+            continue;
+        }
+
+        VAddr area{(info.GetAddress() <= region_start) ? region_start : info.GetAddress()};
+        area += guard_pages * PageSize;
+
+        const VAddr offset_area{Common::AlignDown(area, align) + offset};
+        area = (area <= offset_area) ? offset_area : offset_area + align;
+
+        const VAddr area_end{area + num_pages * PageSize + guard_pages * PageSize};
+        const VAddr area_last{area_end - 1};
+
+        if (info.GetAddress() <= area && area < area_last && area_last <= region_last &&
+            area_last <= info.GetLastAddress()) {
+            return area;
+        }
+    }
+
+    return {};
+}
+
+void MemoryBlockManager::Update(VAddr addr, std::size_t num_pages, MemoryState prev_state,
+                                MemoryPermission prev_perm, MemoryAttribute prev_attribute,
+                                MemoryState state, MemoryPermission perm,
+                                MemoryAttribute attribute) {
+    const std::size_t prev_count{memory_block_tree.size()};
+    const VAddr end_addr{addr + num_pages * PageSize};
+    iterator node{memory_block_tree.begin()};
+
+    prev_attribute |= MemoryAttribute::IpcAndDeviceMapped;
+
+    while (node != memory_block_tree.end()) {
+        MemoryBlock* block{&(*node)};
+        iterator next_node{std::next(node)};
+        const VAddr cur_addr{block->GetAddress()};
+        const VAddr cur_end_addr{block->GetNumPages() * PageSize + cur_addr};
+
+        if (addr < cur_end_addr && cur_addr < end_addr) {
+            if (!block->HasProperties(prev_state, prev_perm, prev_attribute)) {
+                node = next_node;
+                continue;
+            }
+
+            iterator new_node{node};
+            if (addr > cur_addr) {
+                memory_block_tree.insert(node, block->Split(addr));
+            }
+
+            if (end_addr < cur_end_addr) {
+                new_node = memory_block_tree.insert(node, block->Split(end_addr));
+            }
+
+            new_node->Update(state, perm, attribute);
+
+            MergeAdjacent(new_node, next_node);
+        }
+
+        if (cur_end_addr - 1 >= end_addr - 1) {
+            break;
+        }
+
+        node = next_node;
+    }
+}
+
+void MemoryBlockManager::Update(VAddr addr, std::size_t num_pages, MemoryState state,
+                                MemoryPermission perm, MemoryAttribute attribute) {
+    const std::size_t prev_count{memory_block_tree.size()};
+    const VAddr end_addr{addr + num_pages * PageSize};
+    iterator node{memory_block_tree.begin()};
+
+    while (node != memory_block_tree.end()) {
+        MemoryBlock* block{&(*node)};
+        iterator next_node{std::next(node)};
+        const VAddr cur_addr{block->GetAddress()};
+        const VAddr cur_end_addr{block->GetNumPages() * PageSize + cur_addr};
+
+        if (addr < cur_end_addr && cur_addr < end_addr) {
+            iterator new_node{node};
+
+            if (addr > cur_addr) {
+                memory_block_tree.insert(node, block->Split(addr));
+            }
+
+            if (end_addr < cur_end_addr) {
+                new_node = memory_block_tree.insert(node, block->Split(end_addr));
+            }
+
+            new_node->Update(state, perm, attribute);
+
+            MergeAdjacent(new_node, next_node);
+        }
+
+        if (cur_end_addr - 1 >= end_addr - 1) {
+            break;
+        }
+
+        node = next_node;
+    }
+}
+
+void MemoryBlockManager::IterateForRange(VAddr start, VAddr end, IterateFunc&& func) {
+    const_iterator it{FindIterator(start)};
+    MemoryInfo info{};
+    do {
+        info = it->GetMemoryInfo();
+        func(info);
+        it = std::next(it);
+    } while (info.addr + info.size - 1 < end - 1 && it != cend());
+}
+
+void MemoryBlockManager::MergeAdjacent(iterator it, iterator& next_it) {
+    MemoryBlock* block{&(*it)};
+
+    auto EraseIt = [&](const iterator it_to_erase) {
+        if (next_it == it_to_erase) {
+            next_it = std::next(next_it);
+        }
+        memory_block_tree.erase(it_to_erase);
+    };
+
+    if (it != memory_block_tree.begin()) {
+        MemoryBlock* prev{&(*std::prev(it))};
+
+        if (block->HasSameProperties(*prev)) {
+            const iterator prev_it{std::prev(it)};
+
+            prev->Add(block->GetNumPages());
+            EraseIt(it);
+
+            it = prev_it;
+            block = prev;
+        }
+    }
+
+    if (it != cend()) {
+        const MemoryBlock* const next{&(*std::next(it))};
+
+        if (block->HasSameProperties(*next)) {
+            block->Add(next->GetNumPages());
+            EraseIt(std::next(it));
+        }
+    }
+}
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_block_manager.h

@@ -0,0 +1,64 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <functional>
+#include <list>
+#include <memory>
+
+#include "common/common_types.h"
+#include "core/hle/kernel/memory/memory_block.h"
+
+namespace Kernel::Memory {
+
+class MemoryBlockManager final {
+public:
+    using MemoryBlockTree = std::list<MemoryBlock>;
+    using iterator = MemoryBlockTree::iterator;
+    using const_iterator = MemoryBlockTree::const_iterator;
+
+public:
+    MemoryBlockManager(VAddr start_addr, VAddr end_addr);
+
+    iterator end() {
+        return memory_block_tree.end();
+    }
+    const_iterator end() const {
+        return memory_block_tree.end();
+    }
+    const_iterator cend() const {
+        return memory_block_tree.cend();
+    }
+
+    iterator FindIterator(VAddr addr);
+
+    VAddr FindFreeArea(VAddr region_start, std::size_t region_num_pages, std::size_t num_pages,
+                       std::size_t align, std::size_t offset, std::size_t guard_pages);
+
+    void Update(VAddr addr, std::size_t num_pages, MemoryState prev_state,
+                MemoryPermission prev_perm, MemoryAttribute prev_attribute, MemoryState state,
+                MemoryPermission perm, MemoryAttribute attribute);
+
+    void Update(VAddr addr, std::size_t num_pages, MemoryState state,
+                MemoryPermission perm = MemoryPermission::None,
+                MemoryAttribute attribute = MemoryAttribute::None);
+
+    using IterateFunc = std::function<void(const MemoryInfo&)>;
+    void IterateForRange(VAddr start, VAddr end, IterateFunc&& func);
+
+    MemoryBlock& FindBlock(VAddr addr) {
+        return *FindIterator(addr);
+    }
+
+private:
+    void MergeAdjacent(iterator it, iterator& next_it);
+
+    const VAddr start_addr;
+    const VAddr end_addr;
+
+    MemoryBlockTree memory_block_tree;
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_layout.h

@@ -0,0 +1,73 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Kernel::Memory {
+
+class MemoryRegion final {
+    friend class MemoryLayout;
+
+public:
+    constexpr PAddr StartAddress() const {
+        return start_address;
+    }
+
+    constexpr PAddr EndAddress() const {
+        return end_address;
+    }
+
+private:
+    constexpr MemoryRegion() = default;
+    constexpr MemoryRegion(PAddr start_address, PAddr end_address)
+        : start_address{start_address}, end_address{end_address} {}
+
+    const PAddr start_address{};
+    const PAddr end_address{};
+};
+
+class MemoryLayout final {
+public:
+    constexpr const MemoryRegion& Application() const {
+        return application;
+    }
+
+    constexpr const MemoryRegion& Applet() const {
+        return applet;
+    }
+
+    constexpr const MemoryRegion& System() const {
+        return system;
+    }
+
+    static constexpr MemoryLayout GetDefaultLayout() {
+        constexpr std::size_t application_size{0xcd500000};
+        constexpr std::size_t applet_size{0x1fb00000};
+        constexpr PAddr application_start_address{Core::DramMemoryMap::End - application_size};
+        constexpr PAddr application_end_address{Core::DramMemoryMap::End};
+        constexpr PAddr applet_start_address{application_start_address - applet_size};
+        constexpr PAddr applet_end_address{applet_start_address + applet_size};
+        constexpr PAddr system_start_address{Core::DramMemoryMap::SlabHeapEnd};
+        constexpr PAddr system_end_address{applet_start_address};
+        return {application_start_address, application_end_address, applet_start_address,
+                applet_end_address,        system_start_address,    system_end_address};
+    }
+
+private:
+    constexpr MemoryLayout(PAddr application_start_address, std::size_t application_size,
+                           PAddr applet_start_address, std::size_t applet_size,
+                           PAddr system_start_address, std::size_t system_size)
+        : application{application_start_address, application_size},
+          applet{applet_start_address, applet_size}, system{system_start_address, system_size} {}
+
+    const MemoryRegion application;
+    const MemoryRegion applet;
+    const MemoryRegion system;
+
+    const PAddr start_address{};
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_manager.cpp

@@ -0,0 +1,176 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <algorithm>
+
+#include "common/alignment.h"
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "common/scope_exit.h"
+#include "core/hle/kernel/errors.h"
+#include "core/hle/kernel/memory/memory_manager.h"
+#include "core/hle/kernel/memory/page_linked_list.h"
+
+namespace Kernel::Memory {
+
+std::size_t MemoryManager::Impl::Initialize(Pool new_pool, u64 start_address, u64 end_address) {
+    const auto size{end_address - start_address};
+
+    // Calculate metadata sizes
+    const auto ref_count_size{(size / PageSize) * sizeof(u16)};
+    const auto optimize_map_size{(Common::AlignUp((size / PageSize), 64) / 64) * sizeof(u64)};
+    const auto manager_size{Common::AlignUp(optimize_map_size + ref_count_size, PageSize)};
+    const auto page_heap_size{PageHeap::CalculateMetadataOverheadSize(size)};
+    const auto total_metadata_size{manager_size + page_heap_size};
+    ASSERT(manager_size <= total_metadata_size);
+    ASSERT(Common::IsAligned(total_metadata_size, PageSize));
+
+    // Setup region
+    pool = new_pool;
+
+    // Initialize the manager's KPageHeap
+    heap.Initialize(start_address, size, page_heap_size);
+
+    // Free the memory to the heap
+    heap.Free(start_address, size / PageSize);
+
+    // Update the heap's used size
+    heap.UpdateUsedSize();
+
+    return total_metadata_size;
+}
+
+void MemoryManager::InitializeManager(Pool pool, u64 start_address, u64 end_address) {
+    ASSERT(pool < Pool::Count);
+    managers[static_cast<std::size_t>(pool)].Initialize(pool, start_address, end_address);
+}
+
+VAddr MemoryManager::AllocateContinuous(std::size_t num_pages, std::size_t align_pages, Pool pool,
+                                        Direction dir) {
+    // Early return if we're allocating no pages
+    if (num_pages == 0) {
+        return {};
+    }
+
+    // Lock the pool that we're allocating from
+    const auto pool_index{static_cast<std::size_t>(pool)};
+    std::lock_guard lock{pool_locks[pool_index]};
+
+    // Choose a heap based on our page size request
+    const s32 heap_index{PageHeap::GetAlignedBlockIndex(num_pages, align_pages)};
+
+    // Loop, trying to iterate from each block
+    // TODO (bunnei): Support multiple managers
+    Impl& chosen_manager{managers[pool_index]};
+    VAddr allocated_block{chosen_manager.AllocateBlock(heap_index)};
+
+    // If we failed to allocate, quit now
+    if (!allocated_block) {
+        return {};
+    }
+
+    // If we allocated more than we need, free some
+    const auto allocated_pages{PageHeap::GetBlockNumPages(heap_index)};
+    if (allocated_pages > num_pages) {
+        chosen_manager.Free(allocated_block + num_pages * PageSize, allocated_pages - num_pages);
+    }
+
+    return allocated_block;
+}
+
+ResultCode MemoryManager::Allocate(PageLinkedList& page_list, std::size_t num_pages, Pool pool,
+                                   Direction dir) {
+    ASSERT(page_list.GetNumPages() == 0);
+
+    // Early return if we're allocating no pages
+    if (num_pages == 0) {
+        return RESULT_SUCCESS;
+    }
+
+    // Lock the pool that we're allocating from
+    const auto pool_index{static_cast<std::size_t>(pool)};
+    std::lock_guard lock{pool_locks[pool_index]};
+
+    // Choose a heap based on our page size request
+    const s32 heap_index{PageHeap::GetBlockIndex(num_pages)};
+    if (heap_index < 0) {
+        return ERR_OUT_OF_MEMORY;
+    }
+
+    // TODO (bunnei): Support multiple managers
+    Impl& chosen_manager{managers[pool_index]};
+
+    // Ensure that we don't leave anything un-freed
+    auto group_guard = detail::ScopeExit([&] {
+        for (const auto& it : page_list.Nodes()) {
+            const auto num_pages{std::min(
+                it.GetNumPages(), (chosen_manager.GetEndAddress() - it.GetAddress()) / PageSize)};
+            chosen_manager.Free(it.GetAddress(), num_pages);
+        }
+    });
+
+    // Keep allocating until we've allocated all our pages
+    for (s32 index{heap_index}; index >= 0 && num_pages > 0; index--) {
+        const auto pages_per_alloc{PageHeap::GetBlockNumPages(index)};
+
+        while (num_pages >= pages_per_alloc) {
+            // Allocate a block
+            VAddr allocated_block{chosen_manager.AllocateBlock(index)};
+            if (!allocated_block) {
+                break;
+            }
+
+            // Safely add it to our group
+            {
+                auto block_guard = detail::ScopeExit(
+                    [&] { chosen_manager.Free(allocated_block, pages_per_alloc); });
+
+                if (const ResultCode result{page_list.AddBlock(allocated_block, pages_per_alloc)};
+                    result.IsError()) {
+                    return result;
+                }
+
+                block_guard.Cancel();
+            }
+
+            num_pages -= pages_per_alloc;
+        }
+    }
+
+    // Only succeed if we allocated as many pages as we wanted
+    ASSERT(num_pages >= 0);
+    if (num_pages) {
+        return ERR_OUT_OF_MEMORY;
+    }
+
+    // We succeeded!
+    group_guard.Cancel();
+    return RESULT_SUCCESS;
+}
+
+ResultCode MemoryManager::Free(PageLinkedList& page_list, std::size_t num_pages, Pool pool,
+                               Direction dir) {
+    // Early return if we're freeing no pages
+    if (!num_pages) {
+        return RESULT_SUCCESS;
+    }
+
+    // Lock the pool that we're freeing from
+    const auto pool_index{static_cast<std::size_t>(pool)};
+    std::lock_guard lock{pool_locks[pool_index]};
+
+    // TODO (bunnei): Support multiple managers
+    Impl& chosen_manager{managers[pool_index]};
+
+    // Free all of the pages
+    for (const auto& it : page_list.Nodes()) {
+        const auto num_pages{std::min(
+            it.GetNumPages(), (chosen_manager.GetEndAddress() - it.GetAddress()) / PageSize)};
+        chosen_manager.Free(it.GetAddress(), num_pages);
+    }
+
+    return RESULT_SUCCESS;
+}
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_manager.h

@@ -0,0 +1,97 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <mutex>
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "core/hle/kernel/memory/page_heap.h"
+#include "core/hle/result.h"
+
+namespace Kernel::Memory {
+
+class PageLinkedList;
+
+class MemoryManager final : NonCopyable {
+public:
+    enum class Pool : u32 {
+        Application = 0,
+        Applet = 1,
+        System = 2,
+        SystemNonSecure = 3,
+
+        Count,
+
+        Shift = 4,
+        Mask = (0xF << Shift),
+    };
+
+    enum class Direction : u32 {
+        FromFront = 0,
+        FromBack = 1,
+
+        Shift = 0,
+        Mask = (0xF << Shift),
+    };
+
+    MemoryManager() = default;
+
+    constexpr std::size_t GetSize(Pool pool) const {
+        return managers[static_cast<std::size_t>(pool)].GetSize();
+    }
+
+    void InitializeManager(Pool pool, u64 start_address, u64 end_address);
+    VAddr AllocateContinuous(std::size_t num_pages, std::size_t align_pages, Pool pool,
+                             Direction dir = Direction::FromFront);
+    ResultCode Allocate(PageLinkedList& page_list, std::size_t num_pages, Pool pool,
+                        Direction dir = Direction::FromFront);
+    ResultCode Free(PageLinkedList& page_list, std::size_t num_pages, Pool pool,
+                    Direction dir = Direction::FromFront);
+
+    static constexpr std::size_t MaxManagerCount = 10;
+
+private:
+    class Impl final : NonCopyable {
+    private:
+        using RefCount = u16;
+
+    private:
+        PageHeap heap;
+        Pool pool{};
+
+    public:
+        Impl() = default;
+
+        std::size_t Initialize(Pool new_pool, u64 start_address, u64 end_address);
+
+        VAddr AllocateBlock(s32 index) {
+            return heap.AllocateBlock(index);
+        }
+
+        void Free(VAddr addr, std::size_t num_pages) {
+            heap.Free(addr, num_pages);
+        }
+
+        constexpr std::size_t GetSize() const {
+            return heap.GetSize();
+        }
+
+        constexpr VAddr GetAddress() const {
+            return heap.GetAddress();
+        }
+
+        constexpr VAddr GetEndAddress() const {
+            return heap.GetEndAddress();
+        }
+    };
+
+private:
+    std::array<std::mutex, static_cast<std::size_t>(Pool::Count)> pool_locks;
+    std::array<Impl, MaxManagerCount> managers;
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/memory_types.h

@@ -0,0 +1,18 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+
+#include "common/common_types.h"
+
+namespace Kernel::Memory {
+
+constexpr std::size_t PageBits{12};
+constexpr std::size_t PageSize{1 << PageBits};
+
+using Page = std::array<u8, PageSize>;
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/page_heap.cpp

@@ -0,0 +1,119 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphère, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphère-NX.
+
+#include "core/core.h"
+#include "core/hle/kernel/memory/page_heap.h"
+#include "core/memory.h"
+
+namespace Kernel::Memory {
+
+void PageHeap::Initialize(VAddr address, std::size_t size, std::size_t metadata_size) {
+    // Check our assumptions
+    ASSERT(Common::IsAligned((address), PageSize));
+    ASSERT(Common::IsAligned(size, PageSize));
+
+    // Set our members
+    heap_address = address;
+    heap_size = size;
+
+    // Setup bitmaps
+    metadata.resize(metadata_size / sizeof(u64));
+    u64* cur_bitmap_storage{metadata.data()};
+    for (std::size_t i = 0; i < MemoryBlockPageShifts.size(); i++) {
+        const std::size_t cur_block_shift{MemoryBlockPageShifts[i]};
+        const std::size_t next_block_shift{
+            (i != MemoryBlockPageShifts.size() - 1) ? MemoryBlockPageShifts[i + 1] : 0};
+        cur_bitmap_storage = blocks[i].Initialize(heap_address, heap_size, cur_block_shift,
+                                                  next_block_shift, cur_bitmap_storage);
+    }
+}
+
+VAddr PageHeap::AllocateBlock(s32 index) {
+    const std::size_t needed_size{blocks[index].GetSize()};
+
+    for (s32 i{index}; i < static_cast<s32>(MemoryBlockPageShifts.size()); i++) {
+        if (const VAddr addr{blocks[i].PopBlock()}; addr) {
+            if (const std::size_t allocated_size{blocks[i].GetSize()};
+                allocated_size > needed_size) {
+                Free(addr + needed_size, (allocated_size - needed_size) / PageSize);
+            }
+            return addr;
+        }
+    }
+
+    return 0;
+}
+
+void PageHeap::FreeBlock(VAddr block, s32 index) {
+    do {
+        block = blocks[index++].PushBlock(block);
+    } while (block != 0);
+}
+
+void PageHeap::Free(VAddr addr, std::size_t num_pages) {
+    // Freeing no pages is a no-op
+    if (num_pages == 0) {
+        return;
+    }
+
+    // Find the largest block size that we can free, and free as many as possible
+    s32 big_index{static_cast<s32>(MemoryBlockPageShifts.size()) - 1};
+    const VAddr start{addr};
+    const VAddr end{(num_pages * PageSize) + addr};
+    VAddr before_start{start};
+    VAddr before_end{start};
+    VAddr after_start{end};
+    VAddr after_end{end};
+    while (big_index >= 0) {
+        const std::size_t block_size{blocks[big_index].GetSize()};
+        const VAddr big_start{Common::AlignUp((start), block_size)};
+        const VAddr big_end{Common::AlignDown((end), block_size)};
+        if (big_start < big_end) {
+            // Free as many big blocks as we can
+            for (auto block{big_start}; block < big_end; block += block_size) {
+                FreeBlock(block, big_index);
+            }
+            before_end = big_start;
+            after_start = big_end;
+            break;
+        }
+        big_index--;
+    }
+    ASSERT(big_index >= 0);
+
+    // Free space before the big blocks
+    for (s32 i{big_index - 1}; i >= 0; i--) {
+        const std::size_t block_size{blocks[i].GetSize()};
+        while (before_start + block_size <= before_end) {
+            before_end -= block_size;
+            FreeBlock(before_end, i);
+        }
+    }
+
+    // Free space after the big blocks
+    for (s32 i{big_index - 1}; i >= 0; i--) {
+        const std::size_t block_size{blocks[i].GetSize()};
+        while (after_start + block_size <= after_end) {
+            FreeBlock(after_start, i);
+            after_start += block_size;
+        }
+    }
+}
+
+std::size_t PageHeap::CalculateMetadataOverheadSize(std::size_t region_size) {
+    std::size_t overhead_size = 0;
+    for (std::size_t i = 0; i < MemoryBlockPageShifts.size(); i++) {
+        const std::size_t cur_block_shift{MemoryBlockPageShifts[i]};
+        const std::size_t next_block_shift{
+            (i != MemoryBlockPageShifts.size() - 1) ? MemoryBlockPageShifts[i + 1] : 0};
+        overhead_size += PageHeap::Block::CalculateMetadataOverheadSize(
+            region_size, cur_block_shift, next_block_shift);
+    }
+    return Common::AlignUp(overhead_size, PageSize);
+}
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/page_heap.h

@@ -0,0 +1,370 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphère, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphère-NX.
+
+#pragma once
+
+#include <array>
+#include <vector>
+
+#include "common/alignment.h"
+#include "common/assert.h"
+#include "common/bit_util.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "core/hle/kernel/memory/memory_types.h"
+
+namespace Kernel::Memory {
+
+class PageHeap final : NonCopyable {
+public:
+    static constexpr s32 GetAlignedBlockIndex(std::size_t num_pages, std::size_t align_pages) {
+        const auto target_pages{std::max(num_pages, align_pages)};
+        for (std::size_t i = 0; i < NumMemoryBlockPageShifts; i++) {
+            if (target_pages <=
+                (static_cast<std::size_t>(1) << MemoryBlockPageShifts[i]) / PageSize) {
+                return static_cast<s32>(i);
+            }
+        }
+        return -1;
+    }
+
+    static constexpr s32 GetBlockIndex(std::size_t num_pages) {
+        for (s32 i{static_cast<s32>(NumMemoryBlockPageShifts) - 1}; i >= 0; i--) {
+            if (num_pages >= (static_cast<std::size_t>(1) << MemoryBlockPageShifts[i]) / PageSize) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    static constexpr std::size_t GetBlockSize(std::size_t index) {
+        return static_cast<std::size_t>(1) << MemoryBlockPageShifts[index];
+    }
+
+    static constexpr std::size_t GetBlockNumPages(std::size_t index) {
+        return GetBlockSize(index) / PageSize;
+    }
+
+private:
+    static constexpr std::size_t NumMemoryBlockPageShifts{7};
+    static constexpr std::array<std::size_t, NumMemoryBlockPageShifts> MemoryBlockPageShifts{
+        0xC, 0x10, 0x15, 0x16, 0x19, 0x1D, 0x1E,
+    };
+
+    class Block final : NonCopyable {
+    private:
+        class Bitmap final : NonCopyable {
+        public:
+            static constexpr std::size_t MaxDepth{4};
+
+        private:
+            std::array<u64*, MaxDepth> bit_storages{};
+            std::size_t num_bits{};
+            std::size_t used_depths{};
+
+        public:
+            constexpr Bitmap() = default;
+
+            constexpr std::size_t GetNumBits() const {
+                return num_bits;
+            }
+            constexpr s32 GetHighestDepthIndex() const {
+                return static_cast<s32>(used_depths) - 1;
+            }
+
+            constexpr u64* Initialize(u64* storage, std::size_t size) {
+                //* Initially, everything is un-set
+                num_bits = 0;
+
+                // Calculate the needed bitmap depth
+                used_depths = static_cast<std::size_t>(GetRequiredDepth(size));
+                ASSERT(used_depths <= MaxDepth);
+
+                // Set the bitmap pointers
+                for (s32 depth{GetHighestDepthIndex()}; depth >= 0; depth--) {
+                    bit_storages[depth] = storage;
+                    size = Common::AlignUp(size, 64) / 64;
+                    storage += size;
+                }
+
+                return storage;
+            }
+
+            s64 FindFreeBlock() const {
+                uintptr_t offset{};
+                s32 depth{};
+
+                do {
+                    const u64 v{bit_storages[depth][offset]};
+                    if (v == 0) {
+                        // Non-zero depth indicates that a previous level had a free block
+                        ASSERT(depth == 0);
+                        return -1;
+                    }
+                    offset = offset * 64 + Common::CountTrailingZeroes64(v);
+                    ++depth;
+                } while (depth < static_cast<s32>(used_depths));
+
+                return static_cast<s64>(offset);
+            }
+
+            constexpr void SetBit(std::size_t offset) {
+                SetBit(GetHighestDepthIndex(), offset);
+                num_bits++;
+            }
+
+            constexpr void ClearBit(std::size_t offset) {
+                ClearBit(GetHighestDepthIndex(), offset);
+                num_bits--;
+            }
+
+            constexpr bool ClearRange(std::size_t offset, std::size_t count) {
+                const s32 depth{GetHighestDepthIndex()};
+                const auto bit_ind{offset / 64};
+                u64* bits{bit_storages[depth]};
+                if (count < 64) {
+                    const auto shift{offset % 64};
+                    ASSERT(shift + count <= 64);
+                    // Check that all the bits are set
+                    const u64 mask{((1ULL << count) - 1) << shift};
+                    u64 v{bits[bit_ind]};
+                    if ((v & mask) != mask) {
+                        return false;
+                    }
+
+                    // Clear the bits
+                    v &= ~mask;
+                    bits[bit_ind] = v;
+                    if (v == 0) {
+                        ClearBit(depth - 1, bit_ind);
+                    }
+                } else {
+                    ASSERT(offset % 64 == 0);
+                    ASSERT(count % 64 == 0);
+                    // Check that all the bits are set
+                    std::size_t remaining{count};
+                    std::size_t i = 0;
+                    do {
+                        if (bits[bit_ind + i++] != ~u64(0)) {
+                            return false;
+                        }
+                        remaining -= 64;
+                    } while (remaining > 0);
+
+                    // Clear the bits
+                    remaining = count;
+                    i = 0;
+                    do {
+                        bits[bit_ind + i] = 0;
+                        ClearBit(depth - 1, bit_ind + i);
+                        i++;
+                        remaining -= 64;
+                    } while (remaining > 0);
+                }
+
+                num_bits -= count;
+                return true;
+            }
+
+        private:
+            constexpr void SetBit(s32 depth, std::size_t offset) {
+                while (depth >= 0) {
+                    const auto ind{offset / 64};
+                    const auto which{offset % 64};
+                    const u64 mask{1ULL << which};
+
+                    u64* bit{std::addressof(bit_storages[depth][ind])};
+                    const u64 v{*bit};
+                    ASSERT((v & mask) == 0);
+                    *bit = v | mask;
+                    if (v) {
+                        break;
+                    }
+                    offset = ind;
+                    depth--;
+                }
+            }
+
+            constexpr void ClearBit(s32 depth, std::size_t offset) {
+                while (depth >= 0) {
+                    const auto ind{offset / 64};
+                    const auto which{offset % 64};
+                    const u64 mask{1ULL << which};
+
+                    u64* bit{std::addressof(bit_storages[depth][ind])};
+                    u64 v{*bit};
+                    ASSERT((v & mask) != 0);
+                    v &= ~mask;
+                    *bit = v;
+                    if (v) {
+                        break;
+                    }
+                    offset = ind;
+                    depth--;
+                }
+            }
+
+        private:
+            static constexpr s32 GetRequiredDepth(std::size_t region_size) {
+                s32 depth = 0;
+                while (true) {
+                    region_size /= 64;
+                    depth++;
+                    if (region_size == 0) {
+                        return depth;
+                    }
+                }
+            }
+
+        public:
+            static constexpr std::size_t CalculateMetadataOverheadSize(std::size_t region_size) {
+                std::size_t overhead_bits = 0;
+                for (s32 depth{GetRequiredDepth(region_size) - 1}; depth >= 0; depth--) {
+                    region_size = Common::AlignUp(region_size, 64) / 64;
+                    overhead_bits += region_size;
+                }
+                return overhead_bits * sizeof(u64);
+            }
+        };
+
+    private:
+        Bitmap bitmap;
+        VAddr heap_address{};
+        uintptr_t end_offset{};
+        std::size_t block_shift{};
+        std::size_t next_block_shift{};
+
+    public:
+        constexpr Block() = default;
+
+        constexpr std::size_t GetShift() const {
+            return block_shift;
+        }
+        constexpr std::size_t GetNextShift() const {
+            return next_block_shift;
+        }
+        constexpr std::size_t GetSize() const {
+            return static_cast<std::size_t>(1) << GetShift();
+        }
+        constexpr std::size_t GetNumPages() const {
+            return GetSize() / PageSize;
+        }
+        constexpr std::size_t GetNumFreeBlocks() const {
+            return bitmap.GetNumBits();
+        }
+        constexpr std::size_t GetNumFreePages() const {
+            return GetNumFreeBlocks() * GetNumPages();
+        }
+
+        constexpr u64* Initialize(VAddr addr, std::size_t size, std::size_t bs, std::size_t nbs,
+                                  u64* bit_storage) {
+            // Set shifts
+            block_shift = bs;
+            next_block_shift = nbs;
+
+            // Align up the address
+            VAddr end{addr + size};
+            const auto align{(next_block_shift != 0) ? (1ULL << next_block_shift)
+                                                     : (1ULL << block_shift)};
+            addr = Common::AlignDown((addr), align);
+            end = Common::AlignUp((end), align);
+
+            heap_address = addr;
+            end_offset = (end - addr) / (1ULL << block_shift);
+            return bitmap.Initialize(bit_storage, end_offset);
+        }
+
+        constexpr VAddr PushBlock(VAddr address) {
+            // Set the bit for the free block
+            std::size_t offset{(address - heap_address) >> GetShift()};
+            bitmap.SetBit(offset);
+
+            // If we have a next shift, try to clear the blocks below and return the address
+            if (GetNextShift()) {
+                const auto diff{1ULL << (GetNextShift() - GetShift())};
+                offset = Common::AlignDown(offset, diff);
+                if (bitmap.ClearRange(offset, diff)) {
+                    return heap_address + (offset << GetShift());
+                }
+            }
+
+            // We couldn't coalesce, or we're already as big as possible
+            return 0;
+        }
+
+        VAddr PopBlock() {
+            // Find a free block
+            const s64 soffset{bitmap.FindFreeBlock()};
+            if (soffset < 0) {
+                return 0;
+            }
+            const auto offset{static_cast<std::size_t>(soffset)};
+
+            // Update our tracking and return it
+            bitmap.ClearBit(offset);
+            return heap_address + (offset << GetShift());
+        }
+
+    public:
+        static constexpr std::size_t CalculateMetadataOverheadSize(std::size_t region_size,
+                                                                   std::size_t cur_block_shift,
+                                                                   std::size_t next_block_shift) {
+            const auto cur_block_size{(1ULL << cur_block_shift)};
+            const auto next_block_size{(1ULL << next_block_shift)};
+            const auto align{(next_block_shift != 0) ? next_block_size : cur_block_size};
+            return Bitmap::CalculateMetadataOverheadSize(
+                (align * 2 + Common::AlignUp(region_size, align)) / cur_block_size);
+        }
+    };
+
+public:
+    PageHeap() = default;
+
+    constexpr VAddr GetAddress() const {
+        return heap_address;
+    }
+    constexpr std::size_t GetSize() const {
+        return heap_size;
+    }
+    constexpr VAddr GetEndAddress() const {
+        return GetAddress() + GetSize();
+    }
+    constexpr std::size_t GetPageOffset(VAddr block) const {
+        return (block - GetAddress()) / PageSize;
+    }
+
+    void Initialize(VAddr heap_address, std::size_t heap_size, std::size_t metadata_size);
+    VAddr AllocateBlock(s32 index);
+    void Free(VAddr addr, std::size_t num_pages);
+
+    void UpdateUsedSize() {
+        used_size = heap_size - (GetNumFreePages() * PageSize);
+    }
+
+    static std::size_t CalculateMetadataOverheadSize(std::size_t region_size);
+
+private:
+    constexpr std::size_t GetNumFreePages() const {
+        std::size_t num_free{};
+
+        for (const auto& block : blocks) {
+            num_free += block.GetNumFreePages();
+        }
+
+        return num_free;
+    }
+
+    void FreeBlock(VAddr block, s32 index);
+
+    VAddr heap_address{};
+    std::size_t heap_size{};
+    std::size_t used_size{};
+    std::array<Block, NumMemoryBlockPageShifts> blocks{};
+    std::vector<u64> metadata;
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/page_linked_list.h

@@ -0,0 +1,93 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <list>
+
+#include "common/assert.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "core/hle/kernel/memory/memory_types.h"
+#include "core/hle/result.h"
+
+namespace Kernel::Memory {
+
+class PageLinkedList final {
+public:
+    class Node final {
+    public:
+        constexpr Node(u64 addr, std::size_t num_pages) : addr{addr}, num_pages{num_pages} {}
+
+        constexpr u64 GetAddress() const {
+            return addr;
+        }
+
+        constexpr std::size_t GetNumPages() const {
+            return num_pages;
+        }
+
+    private:
+        u64 addr{};
+        std::size_t num_pages{};
+    };
+
+public:
+    PageLinkedList() = default;
+    PageLinkedList(u64 address, u64 num_pages) {
+        ASSERT(AddBlock(address, num_pages).IsSuccess());
+    }
+
+    constexpr std::list<Node>& Nodes() {
+        return nodes;
+    }
+
+    constexpr const std::list<Node>& Nodes() const {
+        return nodes;
+    }
+
+    std::size_t GetNumPages() const {
+        std::size_t num_pages = 0;
+        for (const Node& node : nodes) {
+            num_pages += node.GetNumPages();
+        }
+        return num_pages;
+    }
+
+    bool IsEqual(PageLinkedList& other) const {
+        auto this_node = nodes.begin();
+        auto other_node = other.nodes.begin();
+        while (this_node != nodes.end() && other_node != other.nodes.end()) {
+            if (this_node->GetAddress() != other_node->GetAddress() ||
+                this_node->GetNumPages() != other_node->GetNumPages()) {
+                return false;
+            }
+            this_node = std::next(this_node);
+            other_node = std::next(other_node);
+        }
+
+        return this_node == nodes.end() && other_node == other.nodes.end();
+    }
+
+    ResultCode AddBlock(u64 address, u64 num_pages) {
+        if (!num_pages) {
+            return RESULT_SUCCESS;
+        }
+        if (!nodes.empty()) {
+            const auto node = nodes.back();
+            if (node.GetAddress() + node.GetNumPages() * PageSize == address) {
+                address = node.GetAddress();
+                num_pages += node.GetNumPages();
+                nodes.pop_back();
+            }
+        }
+        nodes.push_back({address, num_pages});
+        return RESULT_SUCCESS;
+    }
+
+private:
+    std::list<Node> nodes;
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/page_table.h

@@ -0,0 +1,276 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <list>
+#include <memory>
+#include <mutex>
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "common/page_table.h"
+#include "core/file_sys/program_metadata.h"
+#include "core/hle/kernel/memory/memory_block.h"
+#include "core/hle/kernel/memory/memory_manager.h"
+
+namespace Core {
+class System;
+}
+
+namespace Kernel::Memory {
+
+class MemoryBlockManager;
+
+class PageTable final : NonCopyable {
+public:
+    explicit PageTable(Core::System& system);
+
+    ResultCode InitializeForProcess(FileSys::ProgramAddressSpaceType as_type, bool enable_aslr,
+                                    VAddr code_addr, std::size_t code_size,
+                                    Memory::MemoryManager::Pool pool);
+    ResultCode MapProcessCode(VAddr addr, std::size_t pages_count, MemoryState state,
+                              MemoryPermission perm);
+    ResultCode MapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
+    ResultCode UnmapProcessCodeMemory(VAddr dst_addr, VAddr src_addr, std::size_t size);
+    ResultCode MapPhysicalMemory(VAddr addr, std::size_t size);
+    ResultCode UnmapPhysicalMemory(VAddr addr, std::size_t size);
+    ResultCode UnmapMemory(VAddr addr, std::size_t size);
+    ResultCode Map(VAddr dst_addr, VAddr src_addr, std::size_t size);
+    ResultCode Unmap(VAddr dst_addr, VAddr src_addr, std::size_t size);
+    ResultCode MapPages(VAddr addr, PageLinkedList& page_linked_list, MemoryState state,
+                        MemoryPermission perm);
+    ResultCode SetCodeMemoryPermission(VAddr addr, std::size_t size, MemoryPermission perm);
+    MemoryInfo QueryInfo(VAddr addr);
+    ResultCode ReserveTransferMemory(VAddr addr, std::size_t size, MemoryPermission perm);
+    ResultCode ResetTransferMemory(VAddr addr, std::size_t size);
+    ResultCode SetMemoryAttribute(VAddr addr, std::size_t size, MemoryAttribute mask,
+                                  MemoryAttribute value);
+    ResultCode SetHeapCapacity(std::size_t new_heap_capacity);
+    ResultVal<VAddr> SetHeapSize(std::size_t size);
+    ResultVal<VAddr> AllocateAndMapMemory(std::size_t needed_num_pages, std::size_t align,
+                                          bool is_map_only, VAddr region_start,
+                                          std::size_t region_num_pages, MemoryState state,
+                                          MemoryPermission perm, PAddr map_addr = 0);
+
+    Common::PageTable& PageTableImpl() {
+        return page_table_impl;
+    }
+
+    const Common::PageTable& PageTableImpl() const {
+        return page_table_impl;
+    }
+
+private:
+    enum class OperationType : u32 {
+        Map,
+        MapGroup,
+        Unmap,
+        ChangePermissions,
+        ChangePermissionsAndRefresh,
+    };
+
+    static constexpr MemoryAttribute DefaultMemoryIgnoreAttr =
+        MemoryAttribute::DontCareMask | MemoryAttribute::IpcLocked | MemoryAttribute::DeviceShared;
+
+    ResultCode InitializeMemoryLayout(VAddr start, VAddr end);
+    ResultCode MapPages(VAddr addr, const PageLinkedList& page_linked_list, MemoryPermission perm);
+    void MapPhysicalMemory(PageLinkedList& page_linked_list, VAddr start, VAddr end);
+    bool IsRegionMapped(VAddr address, u64 size);
+    bool IsRegionContiguous(VAddr addr, u64 size) const;
+    void AddRegionToPages(VAddr start, std::size_t num_pages, PageLinkedList& page_linked_list);
+    MemoryInfo QueryInfoImpl(VAddr addr);
+    VAddr AllocateVirtualMemory(VAddr start, std::size_t region_num_pages, u64 needed_num_pages,
+                                std::size_t align);
+    ResultCode Operate(VAddr addr, std::size_t num_pages, const PageLinkedList& page_group,
+                       OperationType operation);
+    ResultCode Operate(VAddr addr, std::size_t num_pages, MemoryPermission perm,
+                       OperationType operation, PAddr map_addr = 0);
+    constexpr VAddr GetRegionAddress(MemoryState state) const;
+    constexpr std::size_t GetRegionSize(MemoryState state) const;
+    constexpr bool CanContain(VAddr addr, std::size_t size, MemoryState state) const;
+
+    constexpr ResultCode CheckMemoryState(const MemoryInfo& info, MemoryState state_mask,
+                                          MemoryState state, MemoryPermission perm_mask,
+                                          MemoryPermission perm, MemoryAttribute attr_mask,
+                                          MemoryAttribute attr) const;
+    ResultCode CheckMemoryState(MemoryState* out_state, MemoryPermission* out_perm,
+                                MemoryAttribute* out_attr, VAddr addr, std::size_t size,
+                                MemoryState state_mask, MemoryState state,
+                                MemoryPermission perm_mask, MemoryPermission perm,
+                                MemoryAttribute attr_mask, MemoryAttribute attr,
+                                MemoryAttribute ignore_attr = DefaultMemoryIgnoreAttr);
+    ResultCode CheckMemoryState(VAddr addr, std::size_t size, MemoryState state_mask,
+                                MemoryState state, MemoryPermission perm_mask,
+                                MemoryPermission perm, MemoryAttribute attr_mask,
+                                MemoryAttribute attr,
+                                MemoryAttribute ignore_attr = DefaultMemoryIgnoreAttr) {
+        return CheckMemoryState(nullptr, nullptr, nullptr, addr, size, state_mask, state, perm_mask,
+                                perm, attr_mask, attr, ignore_attr);
+    }
+
+    std::recursive_mutex page_table_lock;
+    std::unique_ptr<MemoryBlockManager> block_manager;
+
+public:
+    constexpr VAddr GetAddressSpaceStart() const {
+        return address_space_start;
+    }
+    constexpr VAddr GetAddressSpaceEnd() const {
+        return address_space_end;
+    }
+    constexpr std::size_t GetAddressSpaceSize() const {
+        return address_space_end - address_space_start;
+    }
+    constexpr VAddr GetHeapRegionStart() const {
+        return heap_region_start;
+    }
+    constexpr VAddr GetHeapRegionEnd() const {
+        return heap_region_end;
+    }
+    constexpr std::size_t GetHeapRegionSize() const {
+        return heap_region_end - heap_region_start;
+    }
+    constexpr VAddr GetAliasRegionStart() const {
+        return alias_region_start;
+    }
+    constexpr VAddr GetAliasRegionEnd() const {
+        return alias_region_end;
+    }
+    constexpr std::size_t GetAliasRegionSize() const {
+        return alias_region_end - alias_region_start;
+    }
+    constexpr VAddr GetStackRegionStart() const {
+        return stack_region_start;
+    }
+    constexpr VAddr GetStackRegionEnd() const {
+        return stack_region_end;
+    }
+    constexpr std::size_t GetStackRegionSize() const {
+        return stack_region_end - stack_region_start;
+    }
+    constexpr VAddr GetKernelMapRegionStart() const {
+        return kernel_map_region_start;
+    }
+    constexpr VAddr GetKernelMapRegionEnd() const {
+        return kernel_map_region_end;
+    }
+    constexpr VAddr GetCodeRegionStart() const {
+        return code_region_start;
+    }
+    constexpr VAddr GetCodeRegionEnd() const {
+        return code_region_end;
+    }
+    constexpr VAddr GetAliasCodeRegionStart() const {
+        return alias_code_region_start;
+    }
+    constexpr VAddr GetAliasCodeRegionSize() const {
+        return alias_code_region_end - alias_code_region_start;
+    }
+    constexpr std::size_t GetAddressSpaceWidth() const {
+        return address_space_width;
+    }
+    constexpr std::size_t GetHeapSize() {
+        return current_heap_addr - heap_region_start;
+    }
+    constexpr std::size_t GetTotalHeapSize() {
+        return GetHeapSize() + physical_memory_usage;
+    }
+    constexpr bool IsInsideAddressSpace(VAddr address, std::size_t size) const {
+        return address_space_start <= address && address + size - 1 <= address_space_end - 1;
+    }
+    constexpr bool IsOutsideAliasRegion(VAddr address, std::size_t size) const {
+        return alias_region_start > address || address + size - 1 > alias_region_end - 1;
+    }
+    constexpr bool IsOutsideStackRegion(VAddr address, std::size_t size) const {
+        return stack_region_start > address || address + size - 1 > stack_region_end - 1;
+    }
+    constexpr bool IsInvalidRegion(VAddr address, std::size_t size) const {
+        return address + size - 1 > GetAliasCodeRegionStart() + GetAliasCodeRegionSize() - 1;
+    }
+    constexpr bool IsInsideHeapRegion(VAddr address, std::size_t size) const {
+        return address + size > heap_region_start && heap_region_end > address;
+    }
+    constexpr bool IsInsideAliasRegion(VAddr address, std::size_t size) const {
+        return address + size > alias_region_start && alias_region_end > address;
+    }
+    constexpr bool IsOutsideASLRRegion(VAddr address, std::size_t size) const {
+        if (IsInvalidRegion(address, size)) {
+            return true;
+        }
+        if (IsInsideHeapRegion(address, size)) {
+            return true;
+        }
+        if (IsInsideAliasRegion(address, size)) {
+            return true;
+        }
+        return {};
+    }
+    constexpr bool IsInsideASLRRegion(VAddr address, std::size_t size) const {
+        return !IsOutsideASLRRegion(address, size);
+    }
+    constexpr PAddr GetPhysicalAddr(VAddr addr) {
+        return page_table_impl.backing_addr[addr >> Memory::PageBits] + addr;
+    }
+
+private:
+    constexpr bool Contains(VAddr addr) const {
+        return address_space_start <= addr && addr <= address_space_end - 1;
+    }
+    constexpr bool Contains(VAddr addr, std::size_t size) const {
+        return address_space_start <= addr && addr < addr + size &&
+               addr + size - 1 <= address_space_end - 1;
+    }
+    constexpr bool IsKernel() const {
+        return is_kernel;
+    }
+    constexpr bool IsAslrEnabled() const {
+        return is_aslr_enabled;
+    }
+
+    constexpr std::size_t GetNumGuardPages() const {
+        return IsKernel() ? 1 : 4;
+    }
+
+    constexpr bool ContainsPages(VAddr addr, std::size_t num_pages) const {
+        return (address_space_start <= addr) &&
+               (num_pages <= (address_space_end - address_space_start) / PageSize) &&
+               (addr + num_pages * PageSize - 1 <= address_space_end - 1);
+    }
+
+private:
+    VAddr address_space_start{};
+    VAddr address_space_end{};
+    VAddr heap_region_start{};
+    VAddr heap_region_end{};
+    VAddr current_heap_end{};
+    VAddr alias_region_start{};
+    VAddr alias_region_end{};
+    VAddr stack_region_start{};
+    VAddr stack_region_end{};
+    VAddr kernel_map_region_start{};
+    VAddr kernel_map_region_end{};
+    VAddr code_region_start{};
+    VAddr code_region_end{};
+    VAddr alias_code_region_start{};
+    VAddr alias_code_region_end{};
+    VAddr current_heap_addr{};
+
+    std::size_t heap_capacity{};
+    std::size_t physical_memory_usage{};
+    std::size_t max_heap_size{};
+    std::size_t max_physical_memory_size{};
+    std::size_t address_space_width{};
+
+    bool is_kernel{};
+    bool is_aslr_enabled{};
+
+    MemoryManager::Pool memory_pool{MemoryManager::Pool::Application};
+
+    Common::PageTable page_table_impl;
+
+    Core::System& system;
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/slab_heap.h

@@ -0,0 +1,164 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+// This file references various implementation details from Atmosphère, an open-source firmware for
+// the Nintendo Switch. Copyright 2018-2020 Atmosphère-NX.
+
+#pragma once
+
+#include <atomic>
+
+#include "common/assert.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+
+namespace Kernel::Memory {
+
+namespace impl {
+
+class SlabHeapImpl final : NonCopyable {
+public:
+    struct Node {
+        Node* next{};
+    };
+
+    constexpr SlabHeapImpl() = default;
+
+    void Initialize(std::size_t size) {
+        ASSERT(head == nullptr);
+        obj_size = size;
+    }
+
+    constexpr std::size_t GetObjectSize() const {
+        return obj_size;
+    }
+
+    Node* GetHead() const {
+        return head;
+    }
+
+    void* Allocate() {
+        Node* ret = head.load();
+
+        do {
+            if (ret == nullptr) {
+                break;
+            }
+        } while (!head.compare_exchange_weak(ret, ret->next));
+
+        return ret;
+    }
+
+    void Free(void* obj) {
+        Node* node = reinterpret_cast<Node*>(obj);
+
+        Node* cur_head = head.load();
+        do {
+            node->next = cur_head;
+        } while (!head.compare_exchange_weak(cur_head, node));
+    }
+
+private:
+    std::atomic<Node*> head{};
+    std::size_t obj_size{};
+};
+
+} // namespace impl
+
+class SlabHeapBase : NonCopyable {
+public:
+    constexpr SlabHeapBase() = default;
+
+    constexpr bool Contains(uintptr_t addr) const {
+        return start <= addr && addr < end;
+    }
+
+    constexpr std::size_t GetSlabHeapSize() const {
+        return (end - start) / GetObjectSize();
+    }
+
+    constexpr std::size_t GetObjectSize() const {
+        return impl.GetObjectSize();
+    }
+
+    constexpr uintptr_t GetSlabHeapAddress() const {
+        return start;
+    }
+
+    std::size_t GetObjectIndexImpl(const void* obj) const {
+        return (reinterpret_cast<uintptr_t>(obj) - start) / GetObjectSize();
+    }
+
+    std::size_t GetPeakIndex() const {
+        return GetObjectIndexImpl(reinterpret_cast<const void*>(peak));
+    }
+
+    void* AllocateImpl() {
+        return impl.Allocate();
+    }
+
+    void FreeImpl(void* obj) {
+        // Don't allow freeing an object that wasn't allocated from this heap
+        ASSERT(Contains(reinterpret_cast<uintptr_t>(obj)));
+        impl.Free(obj);
+    }
+
+    void InitializeImpl(std::size_t obj_size, void* memory, std::size_t memory_size) {
+        // Ensure we don't initialize a slab using null memory
+        ASSERT(memory != nullptr);
+
+        // Initialize the base allocator
+        impl.Initialize(obj_size);
+
+        // Set our tracking variables
+        const std::size_t num_obj = (memory_size / obj_size);
+        start = reinterpret_cast<uintptr_t>(memory);
+        end = start + num_obj * obj_size;
+        peak = start;
+
+        // Free the objects
+        u8* cur = reinterpret_cast<u8*>(end);
+
+        for (std::size_t i{}; i < num_obj; i++) {
+            cur -= obj_size;
+            impl.Free(cur);
+        }
+    }
+
+private:
+    using Impl = impl::SlabHeapImpl;
+
+    Impl impl;
+    uintptr_t peak{};
+    uintptr_t start{};
+    uintptr_t end{};
+};
+
+template <typename T>
+class SlabHeap final : public SlabHeapBase {
+public:
+    constexpr SlabHeap() : SlabHeapBase() {}
+
+    void Initialize(void* memory, std::size_t memory_size) {
+        InitializeImpl(sizeof(T), memory, memory_size);
+    }
+
+    T* Allocate() {
+        T* obj = reinterpret_cast<T*>(AllocateImpl());
+        if (obj != nullptr) {
+            new (obj) T();
+        }
+        return obj;
+    }
+
+    void Free(T* obj) {
+        FreeImpl(obj);
+    }
+
+    constexpr std::size_t GetObjectIndex(const T* obj) const {
+        return GetObjectIndexImpl(obj);
+    }
+};
+
+} // namespace Kernel::Memory

src/core/hle/kernel/memory/system_control.cpp

@@ -0,0 +1,41 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <random>
+
+#include "core/hle/kernel/memory/system_control.h"
+
+namespace Kernel::Memory::SystemControl {
+
+u64 GenerateRandomU64ForInit() {
+    static std::random_device device;
+    static std::mt19937 gen(device());
+    static std::uniform_int_distribution<u64> distribution(1, std::numeric_limits<u64>::max());
+    return distribution(gen);
+}
+
+template <typename F>
+u64 GenerateUniformRange(u64 min, u64 max, F f) {
+    /* Handle the case where the difference is too large to represent. */
+    if (max == std::numeric_limits<u64>::max() && min == std::numeric_limits<u64>::min()) {
+        return f();
+    }
+
+    /* Iterate until we get a value in range. */
+    const u64 range_size = ((max + 1) - min);
+    const u64 effective_max = (std::numeric_limits<u64>::max() / range_size) * range_size;
+    while (true) {
+        if (const u64 rnd = f(); rnd < effective_max) {
+            return min + (rnd % range_size);
+        }
+    }
+}
+
+u64 GenerateRandomRange(u64 min, u64 max) {
+    return GenerateUniformRange(min, max, GenerateRandomU64ForInit);
+}
+
+} // namespace Kernel::Memory::SystemControl

src/core/hle/kernel/memory/system_control.h

@@ -0,0 +1,18 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_types.h"
+
+namespace Kernel::Memory::SystemControl {
+
+u64 GenerateRandomU64ForInit();
+
+template <typename F>
+u64 GenerateUniformRange(u64 min, u64 max, F f);
+
+u64 GenerateRandomRange(u64 min, u64 max);
+
+} // namespace Kernel::Memory::SystemControl

src/core/hle/kernel/physical_memory.h

@@ -4,6 +4,8 @@
 
 #pragma once
 
+#include <vector>
+
 #include "common/alignment.h"
 
 namespace Kernel {

src/core/hle/kernel/process.cpp

@@ -10,15 +10,18 @@
 #include "common/assert.h"
 #include "common/logging/log.h"
 #include "core/core.h"
+#include "core/device_memory.h"
 #include "core/file_sys/program_metadata.h"
 #include "core/hle/kernel/code_set.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/memory/memory_block_manager.h"
+#include "core/hle/kernel/memory/page_table.h"
+#include "core/hle/kernel/memory/slab_heap.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/resource_limit.h"
 #include "core/hle/kernel/scheduler.h"
 #include "core/hle/kernel/thread.h"
-#include "core/hle/kernel/vm_manager.h"
 #include "core/memory.h"
 #include "core/settings.h"
 
@@ -31,10 +34,8 @@ namespace {
  * @param kernel The kernel instance to create the main thread under.
  * @param priority The priority to give the main thread
  */
-void SetupMainThread(Process& owner_process, KernelCore& kernel, u32 priority) {
-    const auto& vm_manager = owner_process.VMManager();
-    const VAddr entry_point = vm_manager.GetCodeRegionBaseAddress();
-    const VAddr stack_top = vm_manager.GetTLSIORegionEndAddress();
+void SetupMainThread(Process& owner_process, KernelCore& kernel, u32 priority, VAddr stack_top) {
+    const VAddr entry_point = owner_process.PageTable().GetCodeRegionStart();
     auto thread_res = Thread::Create(kernel, "main", entry_point, priority, 0,
                                      owner_process.GetIdealCore(), stack_top, owner_process);
 
@@ -42,6 +43,8 @@ void SetupMainThread(Process& owner_process, KernelCore& kernel, u32 priority) {
 
     // Register 1 must be a handle to the main thread
     const Handle thread_handle = owner_process.GetHandleTable().Create(thread).Unwrap();
+    thread->GetContext32().cpu_registers[0] = 0;
+    thread->GetContext64().cpu_registers[0] = 0;
     thread->GetContext32().cpu_registers[1] = thread_handle;
     thread->GetContext64().cpu_registers[1] = thread_handle;
 
@@ -57,7 +60,8 @@ void SetupMainThread(Process& owner_process, KernelCore& kernel, u32 priority) {
 // (whichever page happens to have an available slot).
 class TLSPage {
 public:
-    static constexpr std::size_t num_slot_entries = Memory::PAGE_SIZE / Memory::TLS_ENTRY_SIZE;
+    static constexpr std::size_t num_slot_entries =
+        Core::Memory::PAGE_SIZE / Core::Memory::TLS_ENTRY_SIZE;
 
     explicit TLSPage(VAddr address) : base_address{address} {}
 
@@ -76,7 +80,7 @@ public:
             }
 
             is_slot_used[i] = true;
-            return base_address + (i * Memory::TLS_ENTRY_SIZE);
+            return base_address + (i * Core::Memory::TLS_ENTRY_SIZE);
         }
 
         return std::nullopt;
@@ -86,15 +90,15 @@ public:
         // Ensure that all given addresses are consistent with how TLS pages
         // are intended to be used when releasing slots.
         ASSERT(IsWithinPage(address));
-        ASSERT((address % Memory::TLS_ENTRY_SIZE) == 0);
+        ASSERT((address % Core::Memory::TLS_ENTRY_SIZE) == 0);
 
-        const std::size_t index = (address - base_address) / Memory::TLS_ENTRY_SIZE;
+        const std::size_t index = (address - base_address) / Core::Memory::TLS_ENTRY_SIZE;
         is_slot_used[index] = false;
     }
 
 private:
     bool IsWithinPage(VAddr address) const {
-        return base_address <= address && address < base_address + Memory::PAGE_SIZE;
+        return base_address <= address && address < base_address + Core::Memory::PAGE_SIZE;
     }
 
     VAddr base_address;
@@ -106,7 +110,7 @@ std::shared_ptr<Process> Process::Create(Core::System& system, std::string name,
 
     std::shared_ptr<Process> process = std::make_shared<Process>(system);
     process->name = std::move(name);
-    process->resource_limit = kernel.GetSystemResourceLimit();
+    process->resource_limit = ResourceLimit::Create(kernel);
     process->status = ProcessStatus::Created;
     process->program_id = 0;
     process->process_id = type == ProcessType::KernelInternal ? kernel.CreateNewKernelProcessID()
@@ -127,7 +131,14 @@ std::shared_ptr<ResourceLimit> Process::GetResourceLimit() const {
 }
 
 u64 Process::GetTotalPhysicalMemoryAvailable() const {
-    return vm_manager.GetTotalPhysicalMemoryAvailable();
+    const u64 capacity{resource_limit->GetCurrentResourceValue(ResourceType::PhysicalMemory) +
+                       page_table->GetTotalHeapSize() + image_size + main_thread_stack_size};
+
+    if (capacity < memory_usage_capacity) {
+        return capacity;
+    }
+
+    return memory_usage_capacity;
 }
 
 u64 Process::GetTotalPhysicalMemoryAvailableWithoutSystemResource() const {
@@ -135,8 +146,7 @@ u64 Process::GetTotalPhysicalMemoryAvailableWithoutSystemResource() const {
 }
 
 u64 Process::GetTotalPhysicalMemoryUsed() const {
-    return vm_manager.GetCurrentHeapSize() + main_thread_stack_size + code_memory_size +
-           GetSystemResourceUsage();
+    return image_size + main_thread_stack_size + page_table->GetTotalHeapSize();
 }
 
 u64 Process::GetTotalPhysicalMemoryUsedWithoutSystemResource() const {
@@ -209,33 +219,82 @@ ResultCode Process::ClearSignalState() {
     return RESULT_SUCCESS;
 }
 
-ResultCode Process::LoadFromMetadata(const FileSys::ProgramMetadata& metadata) {
+ResultCode Process::LoadFromMetadata(const FileSys::ProgramMetadata& metadata,
+                                     std::size_t code_size) {
     program_id = metadata.GetTitleID();
     ideal_core = metadata.GetMainThreadCore();
     is_64bit_process = metadata.Is64BitProgram();
     system_resource_size = metadata.GetSystemResourceSize();
+    image_size = code_size;
 
-    vm_manager.Reset(metadata.GetAddressSpaceType());
-
-    const auto& caps = metadata.GetKernelCapabilities();
-    const auto capability_init_result =
-        capabilities.InitializeForUserProcess(caps.data(), caps.size(), vm_manager);
-    if (capability_init_result.IsError()) {
-        return capability_init_result;
+    // Initialize proces address space
+    if (const ResultCode result{
+            page_table->InitializeForProcess(metadata.GetAddressSpaceType(), false, 0x8000000,
+                                             code_size, Memory::MemoryManager::Pool::Application)};
+        result.IsError()) {
+        return result;
     }
 
+    // Map process code region
+    if (const ResultCode result{page_table->MapProcessCode(
+            page_table->GetCodeRegionStart(), code_size / Memory::PageSize,
+            Memory::MemoryState::Code, Memory::MemoryPermission::None)};
+        result.IsError()) {
+        return result;
+    }
+
+    // Initialize process capabilities
+    const auto& caps{metadata.GetKernelCapabilities()};
+    if (const ResultCode result{
+            capabilities.InitializeForUserProcess(caps.data(), caps.size(), *page_table)};
+        result.IsError()) {
+        return result;
+    }
+
+    // Set memory usage capacity
+    switch (metadata.GetAddressSpaceType()) {
+    case FileSys::ProgramAddressSpaceType::Is32Bit:
+    case FileSys::ProgramAddressSpaceType::Is36Bit:
+    case FileSys::ProgramAddressSpaceType::Is39Bit:
+        memory_usage_capacity = page_table->GetHeapRegionEnd() - page_table->GetHeapRegionStart();
+        break;
+
+    case FileSys::ProgramAddressSpaceType::Is32BitNoMap:
+        memory_usage_capacity = page_table->GetHeapRegionEnd() - page_table->GetHeapRegionStart() +
+                                page_table->GetAliasRegionEnd() - page_table->GetAliasRegionStart();
+        break;
+
+    default:
+        UNREACHABLE();
+    }
+
+    // Set initial resource limits
+    resource_limit->SetLimitValue(
+        ResourceType::PhysicalMemory,
+        kernel.MemoryManager().GetSize(Memory::MemoryManager::Pool::Application));
+    resource_limit->SetLimitValue(ResourceType::Threads, 608);
+    resource_limit->SetLimitValue(ResourceType::Events, 700);
+    resource_limit->SetLimitValue(ResourceType::TransferMemory, 128);
+    resource_limit->SetLimitValue(ResourceType::Sessions, 894);
+    ASSERT(resource_limit->Reserve(ResourceType::PhysicalMemory, code_size));
+
+    // Create TLS region
+    tls_region_address = CreateTLSRegion();
+
     return handle_table.SetSize(capabilities.GetHandleTableSize());
 }
 
 void Process::Run(s32 main_thread_priority, u64 stack_size) {
     AllocateMainThreadStack(stack_size);
-    tls_region_address = CreateTLSRegion();
 
-    vm_manager.LogLayout();
+    const std::size_t heap_capacity{memory_usage_capacity - main_thread_stack_size - image_size};
+    ASSERT(!page_table->SetHeapCapacity(heap_capacity).IsError());
 
     ChangeStatus(ProcessStatus::Running);
 
-    SetupMainThread(*this, kernel, main_thread_priority);
+    SetupMainThread(*this, kernel, main_thread_priority, main_thread_stack_top);
+    resource_limit->Reserve(ResourceType::Threads, 1);
+    resource_limit->Reserve(ResourceType::PhysicalMemory, main_thread_stack_size);
 }
 
 void Process::PrepareForTermination() {
@@ -279,32 +338,37 @@ static auto FindTLSPageWithAvailableSlots(std::vector<TLSPage>& tls_pages) {
 }
 
 VAddr Process::CreateTLSRegion() {
-    auto tls_page_iter = FindTLSPageWithAvailableSlots(tls_pages);
+    if (auto tls_page_iter{FindTLSPageWithAvailableSlots(tls_pages)};
+        tls_page_iter != tls_pages.cend()) {
+        return *tls_page_iter->ReserveSlot();
+    }
 
-    if (tls_page_iter == tls_pages.cend()) {
-        const auto region_address =
-            vm_manager.FindFreeRegion(vm_manager.GetTLSIORegionBaseAddress(),
-                                      vm_manager.GetTLSIORegionEndAddress(), Memory::PAGE_SIZE);
-        ASSERT(region_address.Succeeded());
+    Memory::Page* const tls_page_ptr{kernel.GetUserSlabHeapPages().Allocate()};
+    ASSERT(tls_page_ptr);
 
-        const auto map_result = vm_manager.MapMemoryBlock(
-            *region_address, std::make_shared<PhysicalMemory>(Memory::PAGE_SIZE), 0,
-            Memory::PAGE_SIZE, MemoryState::ThreadLocal);
-        ASSERT(map_result.Succeeded());
+    const VAddr start{page_table->GetKernelMapRegionStart()};
+    const VAddr size{page_table->GetKernelMapRegionEnd() - start};
+    const PAddr tls_map_addr{system.DeviceMemory().GetPhysicalAddr(tls_page_ptr)};
+    const VAddr tls_page_addr{
+        page_table
+            ->AllocateAndMapMemory(1, Memory::PageSize, true, start, size / Memory::PageSize,
+                                   Memory::MemoryState::ThreadLocal,
+                                   Memory::MemoryPermission::ReadAndWrite, tls_map_addr)
+            .ValueOr(0)};
 
-        tls_pages.emplace_back(*region_address);
+    ASSERT(tls_page_addr);
 
-        const auto reserve_result = tls_pages.back().ReserveSlot();
+    std::memset(tls_page_ptr, 0, Memory::PageSize);
+    tls_pages.emplace_back(tls_page_addr);
+
+    const auto reserve_result{tls_pages.back().ReserveSlot()};
     ASSERT(reserve_result.has_value());
 
     return *reserve_result;
-    }
-
-    return *tls_page_iter->ReserveSlot();
 }
 
 void Process::FreeTLSRegion(VAddr tls_address) {
-    const VAddr aligned_address = Common::AlignDown(tls_address, Memory::PAGE_SIZE);
+    const VAddr aligned_address = Common::AlignDown(tls_address, Core::Memory::PAGE_SIZE);
     auto iter =
         std::find_if(tls_pages.begin(), tls_pages.end(), [aligned_address](const auto& page) {
             return page.GetBaseAddress() == aligned_address;
@@ -317,28 +381,22 @@ void Process::FreeTLSRegion(VAddr tls_address) {
     iter->ReleaseSlot(tls_address);
 }
 
-void Process::LoadModule(CodeSet module_, VAddr base_addr) {
-    code_memory_size += module_.memory.size();
-
-    const auto memory = std::make_shared<PhysicalMemory>(std::move(module_.memory));
-
-    const auto MapSegment = [&](const CodeSet::Segment& segment, VMAPermission permissions,
-                                MemoryState memory_state) {
-        const auto vma = vm_manager
-                             .MapMemoryBlock(segment.addr + base_addr, memory, segment.offset,
-                                             segment.size, memory_state)
-                             .Unwrap();
-        vm_manager.Reprotect(vma, permissions);
+void Process::LoadModule(CodeSet code_set, VAddr base_addr) {
+    const auto ReprotectSegment = [&](const CodeSet::Segment& segment,
+                                      Memory::MemoryPermission permission) {
+        page_table->SetCodeMemoryPermission(segment.addr + base_addr, segment.size, permission);
     };
 
-    // Map CodeSet segments
-    MapSegment(module_.CodeSegment(), VMAPermission::ReadExecute, MemoryState::Code);
-    MapSegment(module_.RODataSegment(), VMAPermission::Read, MemoryState::CodeData);
-    MapSegment(module_.DataSegment(), VMAPermission::ReadWrite, MemoryState::CodeData);
+    system.Memory().WriteBlock(*this, base_addr, code_set.memory.data(), code_set.memory.size());
+
+    ReprotectSegment(code_set.CodeSegment(), Memory::MemoryPermission::ReadAndExecute);
+    ReprotectSegment(code_set.RODataSegment(), Memory::MemoryPermission::Read);
+    ReprotectSegment(code_set.DataSegment(), Memory::MemoryPermission::ReadAndWrite);
 }
 
 Process::Process(Core::System& system)
-    : SynchronizationObject{system.Kernel()}, vm_manager{system},
+    : SynchronizationObject{system.Kernel()}, page_table{std::make_unique<Memory::PageTable>(
+                                                  system)},
       address_arbiter{system}, mutex{system}, system{system} {}
 
 Process::~Process() = default;
@@ -361,16 +419,24 @@ void Process::ChangeStatus(ProcessStatus new_status) {
     Signal();
 }
 
-void Process::AllocateMainThreadStack(u64 stack_size) {
-    // The kernel always ensures that the given stack size is page aligned.
-    main_thread_stack_size = Common::AlignUp(stack_size, Memory::PAGE_SIZE);
+ResultCode Process::AllocateMainThreadStack(std::size_t stack_size) {
+    ASSERT(stack_size);
 
-    // Allocate and map the main thread stack
-    const VAddr mapping_address = vm_manager.GetTLSIORegionEndAddress() - main_thread_stack_size;
-    vm_manager
-        .MapMemoryBlock(mapping_address, std::make_shared<PhysicalMemory>(main_thread_stack_size),
-                        0, main_thread_stack_size, MemoryState::Stack)
-        .Unwrap();
+    // The kernel always ensures that the given stack size is page aligned.
+    main_thread_stack_size = Common::AlignUp(stack_size, Memory::PageSize);
+
+    const VAddr start{page_table->GetStackRegionStart()};
+    const std::size_t size{page_table->GetStackRegionEnd() - start};
+
+    CASCADE_RESULT(main_thread_stack_top,
+                   page_table->AllocateAndMapMemory(
+                       main_thread_stack_size / Memory::PageSize, Memory::PageSize, false, start,
+                       size / Memory::PageSize, Memory::MemoryState::Stack,
+                       Memory::MemoryPermission::ReadAndWrite));
+
+    main_thread_stack_top += main_thread_stack_size;
+
+    return RESULT_SUCCESS;
 }
 
 } // namespace Kernel

src/core/hle/kernel/process.h

@@ -16,7 +16,6 @@
 #include "core/hle/kernel/mutex.h"
 #include "core/hle/kernel/process_capability.h"
 #include "core/hle/kernel/synchronization_object.h"
-#include "core/hle/kernel/vm_manager.h"
 #include "core/hle/result.h"
 
 namespace Core {
@@ -36,6 +35,10 @@ class TLSPage;
 
 struct CodeSet;
 
+namespace Memory {
+class PageTable;
+}
+
 enum class MemoryRegion : u16 {
     APPLICATION = 1,
     SYSTEM = 2,
@@ -100,14 +103,14 @@ public:
         return HANDLE_TYPE;
     }
 
-    /// Gets a reference to the process' memory manager.
-    Kernel::VMManager& VMManager() {
-        return vm_manager;
+    /// Gets a reference to the process' page table.
+    Memory::PageTable& PageTable() {
+        return *page_table;
     }
 
-    /// Gets a const reference to the process' memory manager.
-    const Kernel::VMManager& VMManager() const {
-        return vm_manager;
+    /// Gets const a reference to the process' page table.
+    const Memory::PageTable& PageTable() const {
+        return *page_table;
     }
 
     /// Gets a reference to the process' handle table.
@@ -273,7 +276,7 @@ public:
      * @returns RESULT_SUCCESS if all relevant metadata was able to be
      *          loaded and parsed. Otherwise, an error code is returned.
      */
-    ResultCode LoadFromMetadata(const FileSys::ProgramMetadata& metadata);
+    ResultCode LoadFromMetadata(const FileSys::ProgramMetadata& metadata, std::size_t code_size);
 
     /**
      * Starts the main application thread for this process.
@@ -289,7 +292,7 @@ public:
      */
     void PrepareForTermination();
 
-    void LoadModule(CodeSet module_, VAddr base_addr);
+    void LoadModule(CodeSet code_set, VAddr base_addr);
 
     ///////////////////////////////////////////////////////////////////////////////////////////////
     // Thread-local storage management
@@ -313,16 +316,10 @@ private:
     void ChangeStatus(ProcessStatus new_status);
 
     /// Allocates the main thread stack for the process, given the stack size in bytes.
-    void AllocateMainThreadStack(u64 stack_size);
+    ResultCode AllocateMainThreadStack(std::size_t stack_size);
 
-    /// Memory manager for this process.
-    Kernel::VMManager vm_manager;
-
-    /// Size of the main thread's stack in bytes.
-    u64 main_thread_stack_size = 0;
-
-    /// Size of the loaded code memory in bytes.
-    u64 code_memory_size = 0;
+    /// Memory manager for this process
+    std::unique_ptr<Memory::PageTable> page_table;
 
     /// Current status of the process
     ProcessStatus status{};
@@ -390,6 +387,18 @@ private:
 
     /// Name of this process
     std::string name;
+
+    /// Address of the top of the main thread's stack
+    VAddr main_thread_stack_top{};
+
+    /// Size of the main thread's stack
+    std::size_t main_thread_stack_size{};
+
+    /// Memory usage capacity for the process
+    std::size_t memory_usage_capacity{};
+
+    /// Process total image size
+    std::size_t image_size{};
 };
 
 } // namespace Kernel

src/core/hle/kernel/process_capability.cpp

@@ -5,8 +5,8 @@
 #include "common/bit_util.h"
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/handle_table.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process_capability.h"
-#include "core/hle/kernel/vm_manager.h"
 
 namespace Kernel {
 namespace {
@@ -66,7 +66,7 @@ u32 GetFlagBitOffset(CapabilityType type) {
 
 ResultCode ProcessCapabilities::InitializeForKernelProcess(const u32* capabilities,
                                                            std::size_t num_capabilities,
-                                                           VMManager& vm_manager) {
+                                                           Memory::PageTable& page_table) {
     Clear();
 
     // Allow all cores and priorities.
@@ -74,15 +74,15 @@ ResultCode ProcessCapabilities::InitializeForKernelProcess(const u32* capabiliti
     priority_mask = 0xFFFFFFFFFFFFFFFF;
     kernel_version = PackedKernelVersion;
 
-    return ParseCapabilities(capabilities, num_capabilities, vm_manager);
+    return ParseCapabilities(capabilities, num_capabilities, page_table);
 }
 
 ResultCode ProcessCapabilities::InitializeForUserProcess(const u32* capabilities,
                                                          std::size_t num_capabilities,
-                                                         VMManager& vm_manager) {
+                                                         Memory::PageTable& page_table) {
     Clear();
 
-    return ParseCapabilities(capabilities, num_capabilities, vm_manager);
+    return ParseCapabilities(capabilities, num_capabilities, page_table);
 }
 
 void ProcessCapabilities::InitializeForMetadatalessProcess() {
@@ -105,7 +105,7 @@ void ProcessCapabilities::InitializeForMetadatalessProcess() {
 
 ResultCode ProcessCapabilities::ParseCapabilities(const u32* capabilities,
                                                   std::size_t num_capabilities,
-                                                  VMManager& vm_manager) {
+                                                  Memory::PageTable& page_table) {
     u32 set_flags = 0;
     u32 set_svc_bits = 0;
 
@@ -127,13 +127,13 @@ ResultCode ProcessCapabilities::ParseCapabilities(const u32* capabilities,
                 return ERR_INVALID_COMBINATION;
             }
 
-            const auto result = HandleMapPhysicalFlags(descriptor, size_flags, vm_manager);
+            const auto result = HandleMapPhysicalFlags(descriptor, size_flags, page_table);
             if (result.IsError()) {
                 return result;
             }
         } else {
             const auto result =
-                ParseSingleFlagCapability(set_flags, set_svc_bits, descriptor, vm_manager);
+                ParseSingleFlagCapability(set_flags, set_svc_bits, descriptor, page_table);
             if (result.IsError()) {
                 return result;
             }
@@ -144,7 +144,7 @@ ResultCode ProcessCapabilities::ParseCapabilities(const u32* capabilities,
 }
 
 ResultCode ProcessCapabilities::ParseSingleFlagCapability(u32& set_flags, u32& set_svc_bits,
-                                                          u32 flag, VMManager& vm_manager) {
+                                                          u32 flag, Memory::PageTable& page_table) {
     const auto type = GetCapabilityType(flag);
 
     if (type == CapabilityType::Unset) {
@@ -172,7 +172,7 @@ ResultCode ProcessCapabilities::ParseSingleFlagCapability(u32& set_flags, u32& s
     case CapabilityType::Syscall:
         return HandleSyscallFlags(set_svc_bits, flag);
     case CapabilityType::MapIO:
-        return HandleMapIOFlags(flag, vm_manager);
+        return HandleMapIOFlags(flag, page_table);
     case CapabilityType::Interrupt:
         return HandleInterruptFlags(flag);
     case CapabilityType::ProgramType:
@@ -269,12 +269,12 @@ ResultCode ProcessCapabilities::HandleSyscallFlags(u32& set_svc_bits, u32 flags)
 }
 
 ResultCode ProcessCapabilities::HandleMapPhysicalFlags(u32 flags, u32 size_flags,
-                                                       VMManager& vm_manager) {
+                                                       Memory::PageTable& page_table) {
     // TODO(Lioncache): Implement once the memory manager can handle this.
     return RESULT_SUCCESS;
 }
 
-ResultCode ProcessCapabilities::HandleMapIOFlags(u32 flags, VMManager& vm_manager) {
+ResultCode ProcessCapabilities::HandleMapIOFlags(u32 flags, Memory::PageTable& page_table) {
     // TODO(Lioncache): Implement once the memory manager can handle this.
     return RESULT_SUCCESS;
 }

src/core/hle/kernel/process_capability.h

@@ -12,7 +12,9 @@ union ResultCode;
 
 namespace Kernel {
 
-class VMManager;
+namespace Memory {
+class PageTable;
+}
 
 /// The possible types of programs that may be indicated
 /// by the program type capability descriptor.
@@ -81,27 +83,27 @@ public:
     ///
     /// @param capabilities     The capabilities to parse
     /// @param num_capabilities The number of capabilities to parse.
-    /// @param vm_manager       The memory manager to use for handling any mapping-related
+    /// @param page_table       The memory manager to use for handling any mapping-related
     ///                         operations (such as mapping IO memory, etc).
     ///
     /// @returns RESULT_SUCCESS if this capabilities instance was able to be initialized,
     ///          otherwise, an error code upon failure.
     ///
     ResultCode InitializeForKernelProcess(const u32* capabilities, std::size_t num_capabilities,
-                                          VMManager& vm_manager);
+                                          Memory::PageTable& page_table);
 
     /// Initializes this process capabilities instance for a userland process.
     ///
     /// @param capabilities     The capabilities to parse.
     /// @param num_capabilities The total number of capabilities to parse.
-    /// @param vm_manager       The memory manager to use for handling any mapping-related
+    /// @param page_table       The memory manager to use for handling any mapping-related
     ///                         operations (such as mapping IO memory, etc).
     ///
     /// @returns RESULT_SUCCESS if this capabilities instance was able to be initialized,
     ///          otherwise, an error code upon failure.
     ///
     ResultCode InitializeForUserProcess(const u32* capabilities, std::size_t num_capabilities,
-                                        VMManager& vm_manager);
+                                        Memory::PageTable& page_table);
 
     /// Initializes this process capabilities instance for a process that does not
     /// have any metadata to parse.
@@ -181,13 +183,13 @@ private:
     ///
     /// @param capabilities     The sequence of capability descriptors to parse.
     /// @param num_capabilities The number of descriptors within the given sequence.
-    /// @param vm_manager       The memory manager that will perform any memory
+    /// @param page_table       The memory manager that will perform any memory
     ///                         mapping if necessary.
     ///
     /// @return RESULT_SUCCESS if no errors occur, otherwise an error code.
     ///
     ResultCode ParseCapabilities(const u32* capabilities, std::size_t num_capabilities,
-                                 VMManager& vm_manager);
+                                 Memory::PageTable& page_table);
 
     /// Attempts to parse a capability descriptor that is only represented by a
     /// single flag set.
@@ -196,13 +198,13 @@ private:
     ///                     flags being initialized more than once when they shouldn't be.
     /// @param set_svc_bits Running set of bits representing the allowed supervisor calls mask.
     /// @param flag         The flag to attempt to parse.
-    /// @param vm_manager   The memory manager that will perform any memory
+    /// @param page_table   The memory manager that will perform any memory
     ///                     mapping if necessary.
     ///
     /// @return RESULT_SUCCESS if no errors occurred, otherwise an error code.
     ///
     ResultCode ParseSingleFlagCapability(u32& set_flags, u32& set_svc_bits, u32 flag,
-                                         VMManager& vm_manager);
+                                         Memory::PageTable& page_table);
 
     /// Clears the internal state of this process capability instance. Necessary,
     /// to have a sane starting point due to us allowing running executables without
@@ -226,10 +228,10 @@ private:
     ResultCode HandleSyscallFlags(u32& set_svc_bits, u32 flags);
 
     /// Handles flags related to mapping physical memory pages.
-    ResultCode HandleMapPhysicalFlags(u32 flags, u32 size_flags, VMManager& vm_manager);
+    ResultCode HandleMapPhysicalFlags(u32 flags, u32 size_flags, Memory::PageTable& page_table);
 
     /// Handles flags related to mapping IO pages.
-    ResultCode HandleMapIOFlags(u32 flags, VMManager& vm_manager);
+    ResultCode HandleMapIOFlags(u32 flags, Memory::PageTable& page_table);
 
     /// Handles flags related to the interrupt capability flags.
     ResultCode HandleInterruptFlags(u32 flags);

src/core/hle/kernel/resource_limit.cpp

@@ -16,26 +16,60 @@ constexpr std::size_t ResourceTypeToIndex(ResourceType type) {
 ResourceLimit::ResourceLimit(KernelCore& kernel) : Object{kernel} {}
 ResourceLimit::~ResourceLimit() = default;
 
+bool ResourceLimit::Reserve(ResourceType resource, s64 amount) {
+    return Reserve(resource, amount, 10000000000);
+}
+
+bool ResourceLimit::Reserve(ResourceType resource, s64 amount, u64 timeout) {
+    const std::size_t index{ResourceTypeToIndex(resource)};
+
+    s64 new_value = current[index] + amount;
+    while (new_value > limit[index] && available[index] + amount <= limit[index]) {
+        // TODO(bunnei): This is wrong for multicore, we should wait the calling thread for timeout
+        new_value = current[index] + amount;
+
+        if (timeout >= 0) {
+            break;
+        }
+    }
+
+    if (new_value <= limit[index]) {
+        current[index] = new_value;
+        return true;
+    }
+    return false;
+}
+
+void ResourceLimit::Release(ResourceType resource, u64 amount) {
+    Release(resource, amount, amount);
+}
+
+void ResourceLimit::Release(ResourceType resource, u64 used_amount, u64 available_amount) {
+    const std::size_t index{ResourceTypeToIndex(resource)};
+
+    current[index] -= used_amount;
+    available[index] -= available_amount;
+}
+
 std::shared_ptr<ResourceLimit> ResourceLimit::Create(KernelCore& kernel) {
     return std::make_shared<ResourceLimit>(kernel);
 }
 
 s64 ResourceLimit::GetCurrentResourceValue(ResourceType resource) const {
-    return values.at(ResourceTypeToIndex(resource));
+    return limit.at(ResourceTypeToIndex(resource)) - current.at(ResourceTypeToIndex(resource));
 }
 
 s64 ResourceLimit::GetMaxResourceValue(ResourceType resource) const {
-    return limits.at(ResourceTypeToIndex(resource));
+    return limit.at(ResourceTypeToIndex(resource));
 }
 
 ResultCode ResourceLimit::SetLimitValue(ResourceType resource, s64 value) {
-    const auto index = ResourceTypeToIndex(resource);
-
-    if (value < values[index]) {
+    const std::size_t index{ResourceTypeToIndex(resource)};
+    if (current[index] <= value) {
+        limit[index] = value;
+        return RESULT_SUCCESS;
+    } else {
         return ERR_INVALID_STATE;
     }
-
-    values[index] = value;
-    return RESULT_SUCCESS;
 }
 } // namespace Kernel

src/core/hle/kernel/resource_limit.h

@@ -51,6 +51,11 @@ public:
         return HANDLE_TYPE;
     }
 
+    bool Reserve(ResourceType resource, s64 amount);
+    bool Reserve(ResourceType resource, s64 amount, u64 timeout);
+    void Release(ResourceType resource, u64 amount);
+    void Release(ResourceType resource, u64 used_amount, u64 available_amount);
+
     /**
      * Gets the current value for the specified resource.
      * @param resource Requested resource type
@@ -91,10 +96,9 @@ private:
     using ResourceArray =
         std::array<s64, static_cast<std::size_t>(ResourceType::ResourceTypeCount)>;
 
-    /// Maximum values a resource type may reach.
-    ResourceArray limits{};
-    /// Current resource limit values.
-    ResourceArray values{};
+    ResourceArray limit{};
+    ResourceArray current{};
+    ResourceArray available{};
 };
 
 } // namespace Kernel

src/core/hle/kernel/server_session.cpp

@@ -134,7 +134,8 @@ ResultCode ServerSession::HandleDomainSyncRequest(Kernel::HLERequestContext& con
     return RESULT_SUCCESS;
 }
 
-ResultCode ServerSession::QueueSyncRequest(std::shared_ptr<Thread> thread, Memory::Memory& memory) {
+ResultCode ServerSession::QueueSyncRequest(std::shared_ptr<Thread> thread,
+                                           Core::Memory::Memory& memory) {
     u32* cmd_buf{reinterpret_cast<u32*>(memory.GetPointer(thread->GetTLSAddress()))};
     std::shared_ptr<Kernel::HLERequestContext> context{
         std::make_shared<Kernel::HLERequestContext>(SharedFrom(this), std::move(thread))};
@@ -178,7 +179,7 @@ ResultCode ServerSession::CompleteSyncRequest() {
 }
 
 ResultCode ServerSession::HandleSyncRequest(std::shared_ptr<Thread> thread,
-                                            Memory::Memory& memory) {
+                                            Core::Memory::Memory& memory) {
     Core::System::GetInstance().CoreTiming().ScheduleEvent(20000, request_event, {});
     return QueueSyncRequest(std::move(thread), memory);
 }

src/core/hle/kernel/server_session.h

@@ -13,7 +13,7 @@
 #include "core/hle/kernel/synchronization_object.h"
 #include "core/hle/result.h"
 
-namespace Memory {
+namespace Core::Memory {
 class Memory;
 }
 
@@ -92,7 +92,7 @@ public:
      *
      * @returns ResultCode from the operation.
      */
-    ResultCode HandleSyncRequest(std::shared_ptr<Thread> thread, Memory::Memory& memory);
+    ResultCode HandleSyncRequest(std::shared_ptr<Thread> thread, Core::Memory::Memory& memory);
 
     bool ShouldWait(const Thread* thread) const override;
 
@@ -126,7 +126,7 @@ public:
 
 private:
     /// Queues a sync request from the emulated application.
-    ResultCode QueueSyncRequest(std::shared_ptr<Thread> thread, Memory::Memory& memory);
+    ResultCode QueueSyncRequest(std::shared_ptr<Thread> thread, Core::Memory::Memory& memory);
 
     /// Completes a sync request from the emulated application.
     ResultCode CompleteSyncRequest();

src/core/hle/kernel/shared_memory.cpp

@@ -2,149 +2,56 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include <utility>
-
 #include "common/assert.h"
-#include "common/logging/log.h"
-#include "core/hle/kernel/errors.h"
+#include "core/core.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/shared_memory.h"
 
 namespace Kernel {
 
-SharedMemory::SharedMemory(KernelCore& kernel) : Object{kernel} {}
+SharedMemory::SharedMemory(KernelCore& kernel, Core::DeviceMemory& device_memory)
+    : Object{kernel}, device_memory{device_memory} {}
+
 SharedMemory::~SharedMemory() = default;
 
-std::shared_ptr<SharedMemory> SharedMemory::Create(KernelCore& kernel, Process* owner_process,
-                                                   u64 size, MemoryPermission permissions,
-                                                   MemoryPermission other_permissions,
-                                                   VAddr address, MemoryRegion region,
+std::shared_ptr<SharedMemory> SharedMemory::Create(
+    KernelCore& kernel, Core::DeviceMemory& device_memory, Process* owner_process,
+    Memory::PageLinkedList&& page_list, Memory::MemoryPermission owner_permission,
+    Memory::MemoryPermission user_permission, PAddr physical_address, std::size_t size,
     std::string name) {
-    std::shared_ptr<SharedMemory> shared_memory = std::make_shared<SharedMemory>(kernel);
+
+    std::shared_ptr<SharedMemory> shared_memory{
+        std::make_shared<SharedMemory>(kernel, device_memory)};
 
     shared_memory->owner_process = owner_process;
-    shared_memory->name = std::move(name);
+    shared_memory->page_list = std::move(page_list);
+    shared_memory->owner_permission = owner_permission;
+    shared_memory->user_permission = user_permission;
+    shared_memory->physical_address = physical_address;
     shared_memory->size = size;
-    shared_memory->permissions = permissions;
-    shared_memory->other_permissions = other_permissions;
-
-    if (address == 0) {
-        shared_memory->backing_block = std::make_shared<Kernel::PhysicalMemory>(size);
-        shared_memory->backing_block_offset = 0;
-
-        // Refresh the address mappings for the current process.
-        if (kernel.CurrentProcess() != nullptr) {
-            kernel.CurrentProcess()->VMManager().RefreshMemoryBlockMappings(
-                shared_memory->backing_block.get());
-        }
-    } else {
-        const auto& vm_manager = shared_memory->owner_process->VMManager();
-
-        // The memory is already available and mapped in the owner process.
-        const auto vma = vm_manager.FindVMA(address);
-        ASSERT_MSG(vm_manager.IsValidHandle(vma), "Invalid memory address");
-        ASSERT_MSG(vma->second.backing_block, "Backing block doesn't exist for address");
-
-        // The returned VMA might be a bigger one encompassing the desired address.
-        const auto vma_offset = address - vma->first;
-        ASSERT_MSG(vma_offset + size <= vma->second.size,
-                   "Shared memory exceeds bounds of mapped block");
-
-        shared_memory->backing_block = vma->second.backing_block;
-        shared_memory->backing_block_offset = vma->second.offset + vma_offset;
-    }
-
-    shared_memory->base_address = address;
+    shared_memory->name = name;
 
     return shared_memory;
 }
 
-std::shared_ptr<SharedMemory> SharedMemory::CreateForApplet(
-    KernelCore& kernel, std::shared_ptr<Kernel::PhysicalMemory> heap_block, std::size_t offset,
-    u64 size, MemoryPermission permissions, MemoryPermission other_permissions, std::string name) {
-    std::shared_ptr<SharedMemory> shared_memory = std::make_shared<SharedMemory>(kernel);
+ResultCode SharedMemory::Map(Process& target_process, VAddr address, std::size_t size,
+                             Memory::MemoryPermission permission) {
+    const u64 page_count{(size + Memory::PageSize - 1) / Memory::PageSize};
 
-    shared_memory->owner_process = nullptr;
-    shared_memory->name = std::move(name);
-    shared_memory->size = size;
-    shared_memory->permissions = permissions;
-    shared_memory->other_permissions = other_permissions;
-    shared_memory->backing_block = std::move(heap_block);
-    shared_memory->backing_block_offset = offset;
-    shared_memory->base_address =
-        kernel.CurrentProcess()->VMManager().GetHeapRegionBaseAddress() + offset;
-
-    return shared_memory;
-}
-
-ResultCode SharedMemory::Map(Process& target_process, VAddr address, MemoryPermission permissions,
-                             MemoryPermission other_permissions) {
-    const MemoryPermission own_other_permissions =
-        &target_process == owner_process ? this->permissions : this->other_permissions;
-
-    // Automatically allocated memory blocks can only be mapped with other_permissions = DontCare
-    if (base_address == 0 && other_permissions != MemoryPermission::DontCare) {
-        return ERR_INVALID_MEMORY_PERMISSIONS;
+    if (page_list.GetNumPages() != page_count) {
+        UNIMPLEMENTED_MSG("Page count does not match");
     }
 
-    // Error out if the requested permissions don't match what the creator process allows.
-    if (static_cast<u32>(permissions) & ~static_cast<u32>(own_other_permissions)) {
-        LOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match",
-                  GetObjectId(), address, name);
-        return ERR_INVALID_MEMORY_PERMISSIONS;
+    Memory::MemoryPermission expected =
+        &target_process == owner_process ? owner_permission : user_permission;
+
+    if (permission != expected) {
+        UNIMPLEMENTED_MSG("Permission does not match");
     }
 
-    // Error out if the provided permissions are not compatible with what the creator process needs.
-    if (other_permissions != MemoryPermission::DontCare &&
-        static_cast<u32>(this->permissions) & ~static_cast<u32>(other_permissions)) {
-        LOG_ERROR(Kernel, "cannot map id={}, address=0x{:X} name={}, permissions don't match",
-                  GetObjectId(), address, name);
-        return ERR_INVALID_MEMORY_PERMISSIONS;
-    }
-
-    VAddr target_address = address;
-
-    // Map the memory block into the target process
-    auto result = target_process.VMManager().MapMemoryBlock(
-        target_address, backing_block, backing_block_offset, size, MemoryState::Shared);
-    if (result.Failed()) {
-        LOG_ERROR(
-            Kernel,
-            "cannot map id={}, target_address=0x{:X} name={}, error mapping to virtual memory",
-            GetObjectId(), target_address, name);
-        return result.Code();
-    }
-
-    return target_process.VMManager().ReprotectRange(target_address, size,
-                                                     ConvertPermissions(permissions));
-}
-
-ResultCode SharedMemory::Unmap(Process& target_process, VAddr address, u64 unmap_size) {
-    if (unmap_size != size) {
-        LOG_ERROR(Kernel,
-                  "Invalid size passed to Unmap. Size must be equal to the size of the "
-                  "memory managed. Shared memory size=0x{:016X}, Unmap size=0x{:016X}",
-                  size, unmap_size);
-        return ERR_INVALID_SIZE;
-    }
-
-    // TODO(Subv): Verify what happens if the application tries to unmap an address that is not
-    // mapped to a SharedMemory.
-    return target_process.VMManager().UnmapRange(address, size);
-}
-
-VMAPermission SharedMemory::ConvertPermissions(MemoryPermission permission) {
-    u32 masked_permissions =
-        static_cast<u32>(permission) & static_cast<u32>(MemoryPermission::ReadWriteExecute);
-    return static_cast<VMAPermission>(masked_permissions);
-}
-
-u8* SharedMemory::GetPointer(std::size_t offset) {
-    return backing_block->data() + backing_block_offset + offset;
-}
-
-const u8* SharedMemory::GetPointer(std::size_t offset) const {
-    return backing_block->data() + backing_block_offset + offset;
+    return target_process.PageTable().MapPages(address, page_list, Memory::MemoryState::Shared,
+                                               permission);
 }
 
 } // namespace Kernel

src/core/hle/kernel/shared_memory.h

@@ -8,8 +8,10 @@
 #include <string>
 
 #include "common/common_types.h"
+#include "core/device_memory.h"
+#include "core/hle/kernel/memory/memory_block.h"
+#include "core/hle/kernel/memory/page_linked_list.h"
 #include "core/hle/kernel/object.h"
-#include "core/hle/kernel/physical_memory.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/result.h"
 
@@ -17,63 +19,21 @@ namespace Kernel {
 
 class KernelCore;
 
-/// Permissions for mapped shared memory blocks
-enum class MemoryPermission : u32 {
-    None = 0,
-    Read = (1u << 0),
-    Write = (1u << 1),
-    ReadWrite = (Read | Write),
-    Execute = (1u << 2),
-    ReadExecute = (Read | Execute),
-    WriteExecute = (Write | Execute),
-    ReadWriteExecute = (Read | Write | Execute),
-    DontCare = (1u << 28)
-};
-
 class SharedMemory final : public Object {
 public:
-    explicit SharedMemory(KernelCore& kernel);
+    explicit SharedMemory(KernelCore& kernel, Core::DeviceMemory& device_memory);
     ~SharedMemory() override;
 
-    /**
-     * Creates a shared memory object.
-     * @param kernel The kernel instance to create a shared memory instance under.
-     * @param owner_process Process that created this shared memory object.
-     * @param size Size of the memory block. Must be page-aligned.
-     * @param permissions Permission restrictions applied to the process which created the block.
-     * @param other_permissions Permission restrictions applied to other processes mapping the
-     * block.
-     * @param address The address from which to map the Shared Memory.
-     * @param region If the address is 0, the shared memory will be allocated in this region of the
-     * linear heap.
-     * @param name Optional object name, used for debugging purposes.
-     */
-    static std::shared_ptr<SharedMemory> Create(KernelCore& kernel, Process* owner_process,
-                                                u64 size, MemoryPermission permissions,
-                                                MemoryPermission other_permissions,
-                                                VAddr address = 0,
-                                                MemoryRegion region = MemoryRegion::BASE,
-                                                std::string name = "Unknown");
-
-    /**
-     * Creates a shared memory object from a block of memory managed by an HLE applet.
-     * @param kernel The kernel instance to create a shared memory instance under.
-     * @param heap_block Heap block of the HLE applet.
-     * @param offset The offset into the heap block that the SharedMemory will map.
-     * @param size Size of the memory block. Must be page-aligned.
-     * @param permissions Permission restrictions applied to the process which created the block.
-     * @param other_permissions Permission restrictions applied to other processes mapping the
-     * block.
-     * @param name Optional object name, used for debugging purposes.
-     */
-    static std::shared_ptr<SharedMemory> CreateForApplet(
-        KernelCore& kernel, std::shared_ptr<Kernel::PhysicalMemory> heap_block, std::size_t offset,
-        u64 size, MemoryPermission permissions, MemoryPermission other_permissions,
-        std::string name = "Unknown Applet");
+    static std::shared_ptr<SharedMemory> Create(
+        KernelCore& kernel, Core::DeviceMemory& device_memory, Process* owner_process,
+        Memory::PageLinkedList&& page_list, Memory::MemoryPermission owner_permission,
+        Memory::MemoryPermission user_permission, PAddr physical_address, std::size_t size,
+        std::string name);
 
     std::string GetTypeName() const override {
         return "SharedMemory";
     }
+
     std::string GetName() const override {
         return name;
     }
@@ -83,71 +43,42 @@ public:
         return HANDLE_TYPE;
     }
 
-    /// Gets the size of the underlying memory block in bytes.
-    u64 GetSize() const {
-        return size;
-    }
-
-    /**
-     * Converts the specified MemoryPermission into the equivalent VMAPermission.
-     * @param permission The MemoryPermission to convert.
-     */
-    static VMAPermission ConvertPermissions(MemoryPermission permission);
-
     /**
      * Maps a shared memory block to an address in the target process' address space
-     * @param target_process Process on which to map the memory block.
+     * @param target_process Process on which to map the memory block
      * @param address Address in system memory to map shared memory block to
+     * @param size Size of the shared memory block to map
      * @param permissions Memory block map permissions (specified by SVC field)
-     * @param other_permissions Memory block map other permissions (specified by SVC field)
      */
-    ResultCode Map(Process& target_process, VAddr address, MemoryPermission permissions,
-                   MemoryPermission other_permissions);
-
-    /**
-     * Unmaps a shared memory block from the specified address in system memory
-     *
-     * @param target_process Process from which to unmap the memory block.
-     * @param address        Address in system memory where the shared memory block is mapped.
-     * @param unmap_size     The amount of bytes to unmap from this shared memory instance.
-     *
-     * @return Result code of the unmap operation
-     *
-     * @pre The given size to unmap must be the same size as the amount of memory managed by
-     *      the SharedMemory instance itself, otherwise ERR_INVALID_SIZE will be returned.
-     */
-    ResultCode Unmap(Process& target_process, VAddr address, u64 unmap_size);
+    ResultCode Map(Process& target_process, VAddr address, std::size_t size,
+                   Memory::MemoryPermission permission);
 
     /**
      * Gets a pointer to the shared memory block
      * @param offset Offset from the start of the shared memory block to get pointer
      * @return A pointer to the shared memory block from the specified offset
      */
-    u8* GetPointer(std::size_t offset = 0);
+    u8* GetPointer(std::size_t offset = 0) {
+        return device_memory.GetPointer(physical_address + offset);
+    }
 
     /**
-     * Gets a constant pointer to the shared memory block
+     * Gets a pointer to the shared memory block
      * @param offset Offset from the start of the shared memory block to get pointer
-     * @return A constant pointer to the shared memory block from the specified offset
+     * @return A pointer to the shared memory block from the specified offset
      */
-    const u8* GetPointer(std::size_t offset = 0) const;
+    const u8* GetPointer(std::size_t offset = 0) const {
+        return device_memory.GetPointer(physical_address + offset);
+    }
 
 private:
-    /// Backing memory for this shared memory block.
-    std::shared_ptr<PhysicalMemory> backing_block;
-    /// Offset into the backing block for this shared memory.
-    std::size_t backing_block_offset = 0;
-    /// Size of the memory block. Page-aligned.
-    u64 size = 0;
-    /// Permission restrictions applied to the process which created the block.
-    MemoryPermission permissions{};
-    /// Permission restrictions applied to other processes mapping the block.
-    MemoryPermission other_permissions{};
-    /// Process that created this shared memory block.
-    Process* owner_process;
-    /// Address of shared memory block in the owner process if specified.
-    VAddr base_address = 0;
-    /// Name of shared memory object.
+    Core::DeviceMemory& device_memory;
+    Process* owner_process{};
+    Memory::PageLinkedList page_list;
+    Memory::MemoryPermission owner_permission{};
+    Memory::MemoryPermission user_permission{};
+    PAddr physical_address{};
+    std::size_t size{};
     std::string name;
 };
 

src/core/hle/kernel/svc.cpp

@@ -24,6 +24,8 @@
 #include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/handle_table.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/memory/memory_block.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/mutex.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/kernel/readable_event.h"
@@ -31,6 +33,7 @@
 #include "core/hle/kernel/scheduler.h"
 #include "core/hle/kernel/shared_memory.h"
 #include "core/hle/kernel/svc.h"
+#include "core/hle/kernel/svc_types.h"
 #include "core/hle/kernel/svc_wrap.h"
 #include "core/hle/kernel/synchronization.h"
 #include "core/hle/kernel/thread.h"
@@ -42,7 +45,7 @@
 #include "core/memory.h"
 #include "core/reporter.h"
 
-namespace Kernel {
+namespace Kernel::Svc {
 namespace {
 
 // Checks if address + size is greater than the given address
@@ -58,8 +61,8 @@ constexpr u64 MAIN_MEMORY_SIZE = 0x200000000;
 // Helper function that performs the common sanity checks for svcMapMemory
 // and svcUnmapMemory. This is doable, as both functions perform their sanitizing
 // in the same order.
-ResultCode MapUnmapMemorySanityChecks(const VMManager& vm_manager, VAddr dst_addr, VAddr src_addr,
-                                      u64 size) {
+ResultCode MapUnmapMemorySanityChecks(const Memory::PageTable& manager, VAddr dst_addr,
+                                      VAddr src_addr, u64 size) {
     if (!Common::Is4KBAligned(dst_addr)) {
         LOG_ERROR(Kernel_SVC, "Destination address is not aligned to 4KB, 0x{:016X}", dst_addr);
         return ERR_INVALID_ADDRESS;
@@ -93,36 +96,33 @@ ResultCode MapUnmapMemorySanityChecks(const VMManager& vm_manager, VAddr dst_add
         return ERR_INVALID_ADDRESS_STATE;
     }
 
-    if (!vm_manager.IsWithinAddressSpace(src_addr, size)) {
+    if (!manager.IsInsideAddressSpace(src_addr, size)) {
         LOG_ERROR(Kernel_SVC,
                   "Source is not within the address space, addr=0x{:016X}, size=0x{:016X}",
                   src_addr, size);
         return ERR_INVALID_ADDRESS_STATE;
     }
 
-    if (!vm_manager.IsWithinStackRegion(dst_addr, size)) {
+    if (manager.IsOutsideStackRegion(dst_addr, size)) {
         LOG_ERROR(Kernel_SVC,
                   "Destination is not within the stack region, addr=0x{:016X}, size=0x{:016X}",
                   dst_addr, size);
         return ERR_INVALID_MEMORY_RANGE;
     }
 
-    const VAddr dst_end_address = dst_addr + size;
-    if (dst_end_address > vm_manager.GetHeapRegionBaseAddress() &&
-        vm_manager.GetHeapRegionEndAddress() > dst_addr) {
+    if (manager.IsInsideHeapRegion(dst_addr, size)) {
         LOG_ERROR(Kernel_SVC,
                   "Destination does not fit within the heap region, addr=0x{:016X}, "
-                  "size=0x{:016X}, end_addr=0x{:016X}",
-                  dst_addr, size, dst_end_address);
+                  "size=0x{:016X}",
+                  dst_addr, size);
         return ERR_INVALID_MEMORY_RANGE;
     }
 
-    if (dst_end_address > vm_manager.GetMapRegionBaseAddress() &&
-        vm_manager.GetMapRegionEndAddress() > dst_addr) {
+    if (manager.IsInsideAliasRegion(dst_addr, size)) {
         LOG_ERROR(Kernel_SVC,
                   "Destination does not fit within the map region, addr=0x{:016X}, "
-                  "size=0x{:016X}, end_addr=0x{:016X}",
-                  dst_addr, size, dst_end_address);
+                  "size=0x{:016X}",
+                  dst_addr, size);
         return ERR_INVALID_MEMORY_RANGE;
     }
 
@@ -177,13 +177,10 @@ static ResultCode SetHeapSize(Core::System& system, VAddr* heap_addr, u64 heap_s
         return ERR_INVALID_SIZE;
     }
 
-    auto& vm_manager = system.Kernel().CurrentProcess()->VMManager();
-    const auto alloc_result = vm_manager.SetHeapSize(heap_size);
-    if (alloc_result.Failed()) {
-        return alloc_result.Code();
-    }
+    auto& page_table{system.Kernel().CurrentProcess()->PageTable()};
+
+    CASCADE_RESULT(*heap_addr, page_table.SetHeapSize(heap_size));
 
-    *heap_addr = *alloc_result;
     return RESULT_SUCCESS;
 }
 
@@ -194,63 +191,6 @@ static ResultCode SetHeapSize32(Core::System& system, u32* heap_addr, u32 heap_s
     return result;
 }
 
-static ResultCode SetMemoryPermission(Core::System& system, VAddr addr, u64 size, u32 prot) {
-    LOG_TRACE(Kernel_SVC, "called, addr=0x{:X}, size=0x{:X}, prot=0x{:X}", addr, size, prot);
-
-    if (!Common::Is4KBAligned(addr)) {
-        LOG_ERROR(Kernel_SVC, "Address is not aligned to 4KB, addr=0x{:016X}", addr);
-        return ERR_INVALID_ADDRESS;
-    }
-
-    if (size == 0) {
-        LOG_ERROR(Kernel_SVC, "Size is 0");
-        return ERR_INVALID_SIZE;
-    }
-
-    if (!Common::Is4KBAligned(size)) {
-        LOG_ERROR(Kernel_SVC, "Size is not aligned to 4KB, size=0x{:016X}", size);
-        return ERR_INVALID_SIZE;
-    }
-
-    if (!IsValidAddressRange(addr, size)) {
-        LOG_ERROR(Kernel_SVC, "Region is not a valid address range, addr=0x{:016X}, size=0x{:016X}",
-                  addr, size);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    const auto permission = static_cast<MemoryPermission>(prot);
-    if (permission != MemoryPermission::None && permission != MemoryPermission::Read &&
-        permission != MemoryPermission::ReadWrite) {
-        LOG_ERROR(Kernel_SVC, "Invalid memory permission specified, Got memory permission=0x{:08X}",
-                  static_cast<u32>(permission));
-        return ERR_INVALID_MEMORY_PERMISSIONS;
-    }
-
-    auto* const current_process = system.Kernel().CurrentProcess();
-    auto& vm_manager = current_process->VMManager();
-
-    if (!vm_manager.IsWithinAddressSpace(addr, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Source is not within the address space, addr=0x{:016X}, size=0x{:016X}", addr,
-                  size);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    const VMManager::VMAHandle iter = vm_manager.FindVMA(addr);
-    if (!vm_manager.IsValidHandle(iter)) {
-        LOG_ERROR(Kernel_SVC, "Unable to find VMA for address=0x{:016X}", addr);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    LOG_WARNING(Kernel_SVC, "Uniformity check on protected memory is not implemented.");
-    // TODO: Performs a uniformity check to make sure only protected memory is changed (it doesn't
-    // make sense to allow changing permissions on kernel memory itself, etc).
-
-    const auto converted_permissions = SharedMemory::ConvertPermissions(permission);
-
-    return vm_manager.ReprotectRange(addr, size, converted_permissions);
-}
-
 static ResultCode SetMemoryAttribute(Core::System& system, VAddr address, u64 size, u32 mask,
                                      u32 attribute) {
     LOG_DEBUG(Kernel_SVC,
@@ -274,30 +214,19 @@ static ResultCode SetMemoryAttribute(Core::System& system, VAddr address, u64 si
         return ERR_INVALID_ADDRESS_STATE;
     }
 
-    const auto mem_attribute = static_cast<MemoryAttribute>(attribute);
-    const auto mem_mask = static_cast<MemoryAttribute>(mask);
-    const auto attribute_with_mask = mem_attribute | mem_mask;
-
-    if (attribute_with_mask != mem_mask) {
+    const auto attributes{static_cast<Memory::MemoryAttribute>(mask | attribute)};
+    if (attributes != static_cast<Memory::MemoryAttribute>(mask) ||
+        (attributes | Memory::MemoryAttribute::Uncached) != Memory::MemoryAttribute::Uncached) {
         LOG_ERROR(Kernel_SVC,
                   "Memory attribute doesn't match the given mask (Attribute: 0x{:X}, Mask: {:X}",
                   attribute, mask);
         return ERR_INVALID_COMBINATION;
     }
 
-    if ((attribute_with_mask | MemoryAttribute::Uncached) != MemoryAttribute::Uncached) {
-        LOG_ERROR(Kernel_SVC, "Specified attribute isn't equal to MemoryAttributeUncached (8).");
-        return ERR_INVALID_COMBINATION;
-    }
+    auto& page_table{system.Kernel().CurrentProcess()->PageTable()};
 
-    auto& vm_manager = system.Kernel().CurrentProcess()->VMManager();
-    if (!vm_manager.IsWithinAddressSpace(address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Given address (0x{:016X}) is outside the bounds of the address space.", address);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    return vm_manager.SetMemoryAttribute(address, size, mem_mask, mem_attribute);
+    return page_table.SetMemoryAttribute(address, size, static_cast<Memory::MemoryAttribute>(mask),
+                                         static_cast<Memory::MemoryAttribute>(attribute));
 }
 
 /// Maps a memory range into a different range.
@@ -305,14 +234,14 @@ static ResultCode MapMemory(Core::System& system, VAddr dst_addr, VAddr src_addr
     LOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
               src_addr, size);
 
-    auto& vm_manager = system.Kernel().CurrentProcess()->VMManager();
-    const auto result = MapUnmapMemorySanityChecks(vm_manager, dst_addr, src_addr, size);
+    auto& page_table{system.Kernel().CurrentProcess()->PageTable()};
 
-    if (result.IsError()) {
+    if (const ResultCode result{MapUnmapMemorySanityChecks(page_table, dst_addr, src_addr, size)};
+        result.IsError()) {
         return result;
     }
 
-    return vm_manager.MirrorMemory(dst_addr, src_addr, size, MemoryState::Stack);
+    return page_table.Map(dst_addr, src_addr, size);
 }
 
 /// Unmaps a region that was previously mapped with svcMapMemory
@@ -320,21 +249,14 @@ static ResultCode UnmapMemory(Core::System& system, VAddr dst_addr, VAddr src_ad
     LOG_TRACE(Kernel_SVC, "called, dst_addr=0x{:X}, src_addr=0x{:X}, size=0x{:X}", dst_addr,
               src_addr, size);
 
-    auto& vm_manager = system.Kernel().CurrentProcess()->VMManager();
-    const auto result = MapUnmapMemorySanityChecks(vm_manager, dst_addr, src_addr, size);
+    auto& page_table{system.Kernel().CurrentProcess()->PageTable()};
 
-    if (result.IsError()) {
+    if (const ResultCode result{MapUnmapMemorySanityChecks(page_table, dst_addr, src_addr, size)};
+        result.IsError()) {
         return result;
     }
 
-    const auto unmap_res = vm_manager.UnmapRange(dst_addr, size);
-
-    // Reprotect the source mapping on success
-    if (unmap_res.IsSuccess()) {
-        ASSERT(vm_manager.ReprotectRange(src_addr, size, VMAPermission::ReadWrite).IsSuccess());
-    }
-
-    return unmap_res;
+    return page_table.Unmap(dst_addr, src_addr, size);
 }
 
 /// Connect to an OS service given the port name, returns the handle to the port to out
@@ -367,6 +289,8 @@ static ResultCode ConnectToNamedPort(Core::System& system, Handle* out_handle,
         return ERR_NOT_FOUND;
     }
 
+    ASSERT(kernel.CurrentProcess()->GetResourceLimit()->Reserve(ResourceType::Sessions, 1));
+
     auto client_port = it->second;
 
     std::shared_ptr<ClientSession> client_session;
@@ -538,7 +462,7 @@ static ResultCode ArbitrateLock(Core::System& system, Handle holding_thread_hand
               "requesting_current_thread_handle=0x{:08X}",
               holding_thread_handle, mutex_addr, requesting_thread_handle);
 
-    if (Memory::IsKernelVirtualAddress(mutex_addr)) {
+    if (Core::Memory::IsKernelVirtualAddress(mutex_addr)) {
         LOG_ERROR(Kernel_SVC, "Mutex Address is a kernel virtual address, mutex_addr={:016X}",
                   mutex_addr);
         return ERR_INVALID_ADDRESS_STATE;
@@ -558,7 +482,7 @@ static ResultCode ArbitrateLock(Core::System& system, Handle holding_thread_hand
 static ResultCode ArbitrateUnlock(Core::System& system, VAddr mutex_addr) {
     LOG_TRACE(Kernel_SVC, "called mutex_addr=0x{:X}", mutex_addr);
 
-    if (Memory::IsKernelVirtualAddress(mutex_addr)) {
+    if (Core::Memory::IsKernelVirtualAddress(mutex_addr)) {
         LOG_ERROR(Kernel_SVC, "Mutex Address is a kernel virtual address, mutex_addr={:016X}",
                   mutex_addr);
         return ERR_INVALID_ADDRESS_STATE;
@@ -683,7 +607,6 @@ static void Break(Core::System& system, u32 reason, u64 info1, u64 info2) {
         auto* const current_thread = system.CurrentScheduler().GetCurrentThread();
         const auto thread_processor_id = current_thread->GetProcessorID();
         system.ArmInterface(static_cast<std::size_t>(thread_processor_id)).LogBacktrace();
-        ASSERT(false);
 
         system.Kernel().CurrentProcess()->PrepareForTermination();
 
@@ -785,35 +708,35 @@ static ResultCode GetInfo(Core::System& system, u64* result, u64 info_id, u64 ha
             return RESULT_SUCCESS;
 
         case GetInfoType::MapRegionBaseAddr:
-            *result = process->VMManager().GetMapRegionBaseAddress();
+            *result = process->PageTable().GetAliasRegionStart();
             return RESULT_SUCCESS;
 
         case GetInfoType::MapRegionSize:
-            *result = process->VMManager().GetMapRegionSize();
+            *result = process->PageTable().GetAliasRegionSize();
             return RESULT_SUCCESS;
 
         case GetInfoType::HeapRegionBaseAddr:
-            *result = process->VMManager().GetHeapRegionBaseAddress();
+            *result = process->PageTable().GetHeapRegionStart();
             return RESULT_SUCCESS;
 
         case GetInfoType::HeapRegionSize:
-            *result = process->VMManager().GetHeapRegionSize();
+            *result = process->PageTable().GetHeapRegionSize();
             return RESULT_SUCCESS;
 
         case GetInfoType::ASLRRegionBaseAddr:
-            *result = process->VMManager().GetASLRRegionBaseAddress();
+            *result = process->PageTable().GetAliasCodeRegionStart();
             return RESULT_SUCCESS;
 
         case GetInfoType::ASLRRegionSize:
-            *result = process->VMManager().GetASLRRegionSize();
+            *result = process->PageTable().GetAliasCodeRegionSize();
             return RESULT_SUCCESS;
 
         case GetInfoType::StackRegionBaseAddr:
-            *result = process->VMManager().GetStackRegionBaseAddress();
+            *result = process->PageTable().GetStackRegionStart();
             return RESULT_SUCCESS;
 
         case GetInfoType::StackRegionSize:
-            *result = process->VMManager().GetStackRegionSize();
+            *result = process->PageTable().GetStackRegionSize();
             return RESULT_SUCCESS;
 
         case GetInfoType::TotalPhysicalMemoryAvailable:
@@ -987,20 +910,29 @@ static ResultCode MapPhysicalMemory(Core::System& system, VAddr addr, u64 size)
         return ERR_INVALID_MEMORY_RANGE;
     }
 
-    Process* const current_process = system.Kernel().CurrentProcess();
-    auto& vm_manager = current_process->VMManager();
+    Process* const current_process{system.Kernel().CurrentProcess()};
+    auto& page_table{current_process->PageTable()};
 
     if (current_process->GetSystemResourceSize() == 0) {
         LOG_ERROR(Kernel_SVC, "System Resource Size is zero");
         return ERR_INVALID_STATE;
     }
 
-    if (!vm_manager.IsWithinMapRegion(addr, size)) {
-        LOG_ERROR(Kernel_SVC, "Range not within map region");
+    if (!page_table.IsInsideAddressSpace(addr, size)) {
+        LOG_ERROR(Kernel_SVC,
+                  "Address is not within the address space, addr=0x{:016X}, size=0x{:016X}", addr,
+                  size);
         return ERR_INVALID_MEMORY_RANGE;
     }
 
-    return vm_manager.MapPhysicalMemory(addr, size);
+    if (page_table.IsOutsideAliasRegion(addr, size)) {
+        LOG_ERROR(Kernel_SVC,
+                  "Address is not within the alias region, addr=0x{:016X}, size=0x{:016X}", addr,
+                  size);
+        return ERR_INVALID_MEMORY_RANGE;
+    }
+
+    return page_table.MapPhysicalMemory(addr, size);
 }
 
 /// Unmaps memory previously mapped via MapPhysicalMemory
@@ -1027,20 +959,29 @@ static ResultCode UnmapPhysicalMemory(Core::System& system, VAddr addr, u64 size
         return ERR_INVALID_MEMORY_RANGE;
     }
 
-    Process* const current_process = system.Kernel().CurrentProcess();
-    auto& vm_manager = current_process->VMManager();
+    Process* const current_process{system.Kernel().CurrentProcess()};
+    auto& page_table{current_process->PageTable()};
 
     if (current_process->GetSystemResourceSize() == 0) {
         LOG_ERROR(Kernel_SVC, "System Resource Size is zero");
         return ERR_INVALID_STATE;
     }
 
-    if (!vm_manager.IsWithinMapRegion(addr, size)) {
-        LOG_ERROR(Kernel_SVC, "Range not within map region");
+    if (!page_table.IsInsideAddressSpace(addr, size)) {
+        LOG_ERROR(Kernel_SVC,
+                  "Address is not within the address space, addr=0x{:016X}, size=0x{:016X}", addr,
+                  size);
         return ERR_INVALID_MEMORY_RANGE;
     }
 
-    return vm_manager.UnmapPhysicalMemory(addr, size);
+    if (page_table.IsOutsideAliasRegion(addr, size)) {
+        LOG_ERROR(Kernel_SVC,
+                  "Address is not within the alias region, addr=0x{:016X}, size=0x{:016X}", addr,
+                  size);
+        return ERR_INVALID_MEMORY_RANGE;
+    }
+
+    return page_table.UnmapPhysicalMemory(addr, size);
 }
 
 /// Sets the thread activity
@@ -1197,74 +1138,49 @@ static ResultCode MapSharedMemory(Core::System& system, Handle shared_memory_han
         return ERR_INVALID_ADDRESS_STATE;
     }
 
-    const auto permissions_type = static_cast<MemoryPermission>(permissions);
-    if (permissions_type != MemoryPermission::Read &&
-        permissions_type != MemoryPermission::ReadWrite) {
+    const auto permission_type = static_cast<Memory::MemoryPermission>(permissions);
+    if ((permission_type | Memory::MemoryPermission::Write) !=
+        Memory::MemoryPermission::ReadAndWrite) {
         LOG_ERROR(Kernel_SVC, "Expected Read or ReadWrite permission but got permissions=0x{:08X}",
                   permissions);
         return ERR_INVALID_MEMORY_PERMISSIONS;
     }
 
-    auto* const current_process = system.Kernel().CurrentProcess();
-    auto shared_memory = current_process->GetHandleTable().Get<SharedMemory>(shared_memory_handle);
+    auto* const current_process{system.Kernel().CurrentProcess()};
+    auto& page_table{current_process->PageTable()};
+
+    if (page_table.IsInvalidRegion(addr, size)) {
+        LOG_ERROR(Kernel_SVC,
+                  "Addr does not fit within the valid region, addr=0x{:016X}, "
+                  "size=0x{:016X}",
+                  addr, size);
+        return ERR_INVALID_MEMORY_RANGE;
+    }
+
+    if (page_table.IsInsideHeapRegion(addr, size)) {
+        LOG_ERROR(Kernel_SVC,
+                  "Addr does not fit within the heap region, addr=0x{:016X}, "
+                  "size=0x{:016X}",
+                  addr, size);
+        return ERR_INVALID_MEMORY_RANGE;
+    }
+
+    if (page_table.IsInsideAliasRegion(addr, size)) {
+        LOG_ERROR(Kernel_SVC,
+                  "Address does not fit within the map region, addr=0x{:016X}, "
+                  "size=0x{:016X}",
+                  addr, size);
+        return ERR_INVALID_MEMORY_RANGE;
+    }
+
+    auto shared_memory{current_process->GetHandleTable().Get<SharedMemory>(shared_memory_handle)};
     if (!shared_memory) {
         LOG_ERROR(Kernel_SVC, "Shared memory does not exist, shared_memory_handle=0x{:08X}",
                   shared_memory_handle);
         return ERR_INVALID_HANDLE;
     }
 
-    const auto& vm_manager = current_process->VMManager();
-    if (!vm_manager.IsWithinASLRRegion(addr, size)) {
-        LOG_ERROR(Kernel_SVC, "Region is not within the ASLR region. addr=0x{:016X}, size={:016X}",
-                  addr, size);
-        return ERR_INVALID_MEMORY_RANGE;
-    }
-
-    return shared_memory->Map(*current_process, addr, permissions_type, MemoryPermission::DontCare);
-}
-
-static ResultCode UnmapSharedMemory(Core::System& system, Handle shared_memory_handle, VAddr addr,
-                                    u64 size) {
-    LOG_WARNING(Kernel_SVC, "called, shared_memory_handle=0x{:08X}, addr=0x{:X}, size=0x{:X}",
-                shared_memory_handle, addr, size);
-
-    if (!Common::Is4KBAligned(addr)) {
-        LOG_ERROR(Kernel_SVC, "Address is not aligned to 4KB, addr=0x{:016X}", addr);
-        return ERR_INVALID_ADDRESS;
-    }
-
-    if (size == 0) {
-        LOG_ERROR(Kernel_SVC, "Size is 0");
-        return ERR_INVALID_SIZE;
-    }
-
-    if (!Common::Is4KBAligned(size)) {
-        LOG_ERROR(Kernel_SVC, "Size is not aligned to 4KB, size=0x{:016X}", size);
-        return ERR_INVALID_SIZE;
-    }
-
-    if (!IsValidAddressRange(addr, size)) {
-        LOG_ERROR(Kernel_SVC, "Region is not a valid address range, addr=0x{:016X}, size=0x{:016X}",
-                  addr, size);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    auto* const current_process = system.Kernel().CurrentProcess();
-    auto shared_memory = current_process->GetHandleTable().Get<SharedMemory>(shared_memory_handle);
-    if (!shared_memory) {
-        LOG_ERROR(Kernel_SVC, "Shared memory does not exist, shared_memory_handle=0x{:08X}",
-                  shared_memory_handle);
-        return ERR_INVALID_HANDLE;
-    }
-
-    const auto& vm_manager = current_process->VMManager();
-    if (!vm_manager.IsWithinASLRRegion(addr, size)) {
-        LOG_ERROR(Kernel_SVC, "Region is not within the ASLR region. addr=0x{:016X}, size={:016X}",
-                  addr, size);
-        return ERR_INVALID_MEMORY_RANGE;
-    }
-
-    return shared_memory->Unmap(*current_process, addr, size);
+    return shared_memory->Map(*current_process, addr, size, permission_type);
 }
 
 static ResultCode QueryProcessMemory(Core::System& system, VAddr memory_info_address,
@@ -1279,18 +1195,17 @@ static ResultCode QueryProcessMemory(Core::System& system, VAddr memory_info_add
         return ERR_INVALID_HANDLE;
     }
 
-    auto& memory = system.Memory();
-    const auto& vm_manager = process->VMManager();
-    const MemoryInfo memory_info = vm_manager.QueryMemory(address);
+    auto& memory{system.Memory()};
+    const auto memory_info{process->PageTable().QueryInfo(address).GetSvcMemoryInfo()};
 
-    memory.Write64(memory_info_address, memory_info.base_address);
-    memory.Write64(memory_info_address + 8, memory_info.size);
-    memory.Write32(memory_info_address + 16, memory_info.state);
-    memory.Write32(memory_info_address + 20, memory_info.attributes);
-    memory.Write32(memory_info_address + 24, memory_info.permission);
-    memory.Write32(memory_info_address + 32, memory_info.ipc_ref_count);
-    memory.Write32(memory_info_address + 28, memory_info.device_ref_count);
-    memory.Write32(memory_info_address + 36, 0);
+    memory.Write64(memory_info_address + 0x00, memory_info.addr);
+    memory.Write64(memory_info_address + 0x08, memory_info.size);
+    memory.Write32(memory_info_address + 0x10, static_cast<u32>(memory_info.state) & 0xff);
+    memory.Write32(memory_info_address + 0x14, static_cast<u32>(memory_info.attr));
+    memory.Write32(memory_info_address + 0x18, static_cast<u32>(memory_info.perm));
+    memory.Write32(memory_info_address + 0x1c, memory_info.ipc_refcount);
+    memory.Write32(memory_info_address + 0x20, memory_info.device_refcount);
+    memory.Write32(memory_info_address + 0x24, 0);
 
     // Page info appears to be currently unused by the kernel and is always set to zero.
     memory.Write32(page_info_address, 0);
@@ -1314,142 +1229,6 @@ static ResultCode QueryMemory32(Core::System& system, u32 memory_info_address,
     return QueryMemory(system, memory_info_address, page_info_address, query_address);
 }
 
-static ResultCode MapProcessCodeMemory(Core::System& system, Handle process_handle, u64 dst_address,
-                                       u64 src_address, u64 size) {
-    LOG_DEBUG(Kernel_SVC,
-              "called. process_handle=0x{:08X}, dst_address=0x{:016X}, "
-              "src_address=0x{:016X}, size=0x{:016X}",
-              process_handle, dst_address, src_address, size);
-
-    if (!Common::Is4KBAligned(src_address)) {
-        LOG_ERROR(Kernel_SVC, "src_address is not page-aligned (src_address=0x{:016X}).",
-                  src_address);
-        return ERR_INVALID_ADDRESS;
-    }
-
-    if (!Common::Is4KBAligned(dst_address)) {
-        LOG_ERROR(Kernel_SVC, "dst_address is not page-aligned (dst_address=0x{:016X}).",
-                  dst_address);
-        return ERR_INVALID_ADDRESS;
-    }
-
-    if (size == 0 || !Common::Is4KBAligned(size)) {
-        LOG_ERROR(Kernel_SVC, "Size is zero or not page-aligned (size=0x{:016X})", size);
-        return ERR_INVALID_SIZE;
-    }
-
-    if (!IsValidAddressRange(dst_address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Destination address range overflows the address space (dst_address=0x{:016X}, "
-                  "size=0x{:016X}).",
-                  dst_address, size);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    if (!IsValidAddressRange(src_address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Source address range overflows the address space (src_address=0x{:016X}, "
-                  "size=0x{:016X}).",
-                  src_address, size);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable();
-    auto process = handle_table.Get<Process>(process_handle);
-    if (!process) {
-        LOG_ERROR(Kernel_SVC, "Invalid process handle specified (handle=0x{:08X}).",
-                  process_handle);
-        return ERR_INVALID_HANDLE;
-    }
-
-    auto& vm_manager = process->VMManager();
-    if (!vm_manager.IsWithinAddressSpace(src_address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Source address range is not within the address space (src_address=0x{:016X}, "
-                  "size=0x{:016X}).",
-                  src_address, size);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    if (!vm_manager.IsWithinASLRRegion(dst_address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Destination address range is not within the ASLR region (dst_address=0x{:016X}, "
-                  "size=0x{:016X}).",
-                  dst_address, size);
-        return ERR_INVALID_MEMORY_RANGE;
-    }
-
-    return vm_manager.MapCodeMemory(dst_address, src_address, size);
-}
-
-static ResultCode UnmapProcessCodeMemory(Core::System& system, Handle process_handle,
-                                         u64 dst_address, u64 src_address, u64 size) {
-    LOG_DEBUG(Kernel_SVC,
-              "called. process_handle=0x{:08X}, dst_address=0x{:016X}, src_address=0x{:016X}, "
-              "size=0x{:016X}",
-              process_handle, dst_address, src_address, size);
-
-    if (!Common::Is4KBAligned(dst_address)) {
-        LOG_ERROR(Kernel_SVC, "dst_address is not page-aligned (dst_address=0x{:016X}).",
-                  dst_address);
-        return ERR_INVALID_ADDRESS;
-    }
-
-    if (!Common::Is4KBAligned(src_address)) {
-        LOG_ERROR(Kernel_SVC, "src_address is not page-aligned (src_address=0x{:016X}).",
-                  src_address);
-        return ERR_INVALID_ADDRESS;
-    }
-
-    if (size == 0 || Common::Is4KBAligned(size)) {
-        LOG_ERROR(Kernel_SVC, "Size is zero or not page-aligned (size=0x{:016X}).", size);
-        return ERR_INVALID_SIZE;
-    }
-
-    if (!IsValidAddressRange(dst_address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Destination address range overflows the address space (dst_address=0x{:016X}, "
-                  "size=0x{:016X}).",
-                  dst_address, size);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    if (!IsValidAddressRange(src_address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Source address range overflows the address space (src_address=0x{:016X}, "
-                  "size=0x{:016X}).",
-                  src_address, size);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable();
-    auto process = handle_table.Get<Process>(process_handle);
-    if (!process) {
-        LOG_ERROR(Kernel_SVC, "Invalid process handle specified (handle=0x{:08X}).",
-                  process_handle);
-        return ERR_INVALID_HANDLE;
-    }
-
-    auto& vm_manager = process->VMManager();
-    if (!vm_manager.IsWithinAddressSpace(src_address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Source address range is not within the address space (src_address=0x{:016X}, "
-                  "size=0x{:016X}).",
-                  src_address, size);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    if (!vm_manager.IsWithinASLRRegion(dst_address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Destination address range is not within the ASLR region (dst_address=0x{:016X}, "
-                  "size=0x{:016X}).",
-                  dst_address, size);
-        return ERR_INVALID_MEMORY_RANGE;
-    }
-
-    return vm_manager.UnmapCodeMemory(dst_address, src_address, size);
-}
-
 /// Exits the current process
 static void ExitProcess(Core::System& system) {
     auto* current_process = system.Kernel().CurrentProcess();
@@ -1506,6 +1285,9 @@ static ResultCode CreateThread(Core::System& system, Handle* out_handle, VAddr e
     }
 
     auto& kernel = system.Kernel();
+
+    ASSERT(kernel.CurrentProcess()->GetResourceLimit()->Reserve(ResourceType::Threads, 1));
+
     CASCADE_RESULT(std::shared_ptr<Thread> thread,
                    Thread::Create(kernel, "", entry_point, priority, arg, processor_id, stack_top,
                                   *current_process));
@@ -1610,7 +1392,7 @@ static ResultCode WaitProcessWideKeyAtomic(Core::System& system, VAddr mutex_add
         "called mutex_addr={:X}, condition_variable_addr={:X}, thread_handle=0x{:08X}, timeout={}",
         mutex_addr, condition_variable_addr, thread_handle, nano_seconds);
 
-    if (Memory::IsKernelVirtualAddress(mutex_addr)) {
+    if (Core::Memory::IsKernelVirtualAddress(mutex_addr)) {
         LOG_ERROR(
             Kernel_SVC,
             "Given mutex address must not be within the kernel address space. address=0x{:016X}",
@@ -1741,7 +1523,7 @@ static ResultCode WaitForAddress(Core::System& system, VAddr address, u32 type,
               type, value, timeout);
 
     // If the passed address is a kernel virtual address, return invalid memory state.
-    if (Memory::IsKernelVirtualAddress(address)) {
+    if (Core::Memory::IsKernelVirtualAddress(address)) {
         LOG_ERROR(Kernel_SVC, "Address is a kernel virtual address, address={:016X}", address);
         return ERR_INVALID_ADDRESS_STATE;
     }
@@ -1769,7 +1551,7 @@ static ResultCode SignalToAddress(Core::System& system, VAddr address, u32 type,
               address, type, value, num_to_wake);
 
     // If the passed address is a kernel virtual address, return invalid memory state.
-    if (Memory::IsKernelVirtualAddress(address)) {
+    if (Core::Memory::IsKernelVirtualAddress(address)) {
         LOG_ERROR(Kernel_SVC, "Address is a kernel virtual address, address={:016X}", address);
         return ERR_INVALID_ADDRESS_STATE;
     }
@@ -1865,9 +1647,9 @@ static ResultCode CreateTransferMemory(Core::System& system, Handle* handle, VAd
         return ERR_INVALID_ADDRESS_STATE;
     }
 
-    const auto perms = static_cast<MemoryPermission>(permissions);
-    if (perms != MemoryPermission::None && perms != MemoryPermission::Read &&
-        perms != MemoryPermission::ReadWrite) {
+    const auto perms{static_cast<Memory::MemoryPermission>(permissions)};
+    if (perms > Memory::MemoryPermission::ReadAndWrite ||
+        perms == Memory::MemoryPermission::Write) {
         LOG_ERROR(Kernel_SVC, "Invalid memory permissions for transfer memory! (perms={:08X})",
                   permissions);
         return ERR_INVALID_MEMORY_PERMISSIONS;
@@ -1890,111 +1672,6 @@ static ResultCode CreateTransferMemory(Core::System& system, Handle* handle, VAd
     return RESULT_SUCCESS;
 }
 
-static ResultCode MapTransferMemory(Core::System& system, Handle handle, VAddr address, u64 size,
-                                    u32 permission_raw) {
-    LOG_DEBUG(Kernel_SVC,
-              "called. handle=0x{:08X}, address=0x{:016X}, size=0x{:016X}, permissions=0x{:08X}",
-              handle, address, size, permission_raw);
-
-    if (!Common::Is4KBAligned(address)) {
-        LOG_ERROR(Kernel_SVC, "Transfer memory addresses must be 4KB aligned (size=0x{:016X}).",
-                  address);
-        return ERR_INVALID_ADDRESS;
-    }
-
-    if (size == 0 || !Common::Is4KBAligned(size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Transfer memory sizes must be 4KB aligned and not be zero (size=0x{:016X}).",
-                  size);
-        return ERR_INVALID_SIZE;
-    }
-
-    if (!IsValidAddressRange(address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Given address and size overflows the 64-bit range (address=0x{:016X}, "
-                  "size=0x{:016X}).",
-                  address, size);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    const auto permissions = static_cast<MemoryPermission>(permission_raw);
-    if (permissions != MemoryPermission::None && permissions != MemoryPermission::Read &&
-        permissions != MemoryPermission::ReadWrite) {
-        LOG_ERROR(Kernel_SVC, "Invalid transfer memory permissions given (permissions=0x{:08X}).",
-                  permission_raw);
-        return ERR_INVALID_STATE;
-    }
-
-    const auto& kernel = system.Kernel();
-    const auto* const current_process = kernel.CurrentProcess();
-    const auto& handle_table = current_process->GetHandleTable();
-
-    auto transfer_memory = handle_table.Get<TransferMemory>(handle);
-    if (!transfer_memory) {
-        LOG_ERROR(Kernel_SVC, "Nonexistent transfer memory handle given (handle=0x{:08X}).",
-                  handle);
-        return ERR_INVALID_HANDLE;
-    }
-
-    if (!current_process->VMManager().IsWithinASLRRegion(address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Given address and size don't fully fit within the ASLR region "
-                  "(address=0x{:016X}, size=0x{:016X}).",
-                  address, size);
-        return ERR_INVALID_MEMORY_RANGE;
-    }
-
-    return transfer_memory->MapMemory(address, size, permissions);
-}
-
-static ResultCode UnmapTransferMemory(Core::System& system, Handle handle, VAddr address,
-                                      u64 size) {
-    LOG_DEBUG(Kernel_SVC, "called. handle=0x{:08X}, address=0x{:016X}, size=0x{:016X}", handle,
-              address, size);
-
-    if (!Common::Is4KBAligned(address)) {
-        LOG_ERROR(Kernel_SVC, "Transfer memory addresses must be 4KB aligned (size=0x{:016X}).",
-                  address);
-        return ERR_INVALID_ADDRESS;
-    }
-
-    if (size == 0 || !Common::Is4KBAligned(size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Transfer memory sizes must be 4KB aligned and not be zero (size=0x{:016X}).",
-                  size);
-        return ERR_INVALID_SIZE;
-    }
-
-    if (!IsValidAddressRange(address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Given address and size overflows the 64-bit range (address=0x{:016X}, "
-                  "size=0x{:016X}).",
-                  address, size);
-        return ERR_INVALID_ADDRESS_STATE;
-    }
-
-    const auto& kernel = system.Kernel();
-    const auto* const current_process = kernel.CurrentProcess();
-    const auto& handle_table = current_process->GetHandleTable();
-
-    auto transfer_memory = handle_table.Get<TransferMemory>(handle);
-    if (!transfer_memory) {
-        LOG_ERROR(Kernel_SVC, "Nonexistent transfer memory handle given (handle=0x{:08X}).",
-                  handle);
-        return ERR_INVALID_HANDLE;
-    }
-
-    if (!current_process->VMManager().IsWithinASLRRegion(address, size)) {
-        LOG_ERROR(Kernel_SVC,
-                  "Given address and size don't fully fit within the ASLR region "
-                  "(address=0x{:016X}, size=0x{:016X}).",
-                  address, size);
-        return ERR_INVALID_MEMORY_RANGE;
-    }
-
-    return transfer_memory->UnmapMemory(address, size);
-}
-
 static ResultCode GetThreadCoreMask(Core::System& system, Handle thread_handle, u32* core,
                                     u64* mask) {
     LOG_TRACE(Kernel_SVC, "called, handle=0x{:08X}", thread_handle);
@@ -2073,52 +1750,6 @@ static ResultCode SetThreadCoreMask(Core::System& system, Handle thread_handle,
     return RESULT_SUCCESS;
 }
 
-static ResultCode CreateSharedMemory(Core::System& system, Handle* handle, u64 size,
-                                     u32 local_permissions, u32 remote_permissions) {
-    LOG_TRACE(Kernel_SVC, "called, size=0x{:X}, localPerms=0x{:08X}, remotePerms=0x{:08X}", size,
-              local_permissions, remote_permissions);
-    if (size == 0) {
-        LOG_ERROR(Kernel_SVC, "Size is 0");
-        return ERR_INVALID_SIZE;
-    }
-    if (!Common::Is4KBAligned(size)) {
-        LOG_ERROR(Kernel_SVC, "Size is not aligned to 4KB, 0x{:016X}", size);
-        return ERR_INVALID_SIZE;
-    }
-
-    if (size >= MAIN_MEMORY_SIZE) {
-        LOG_ERROR(Kernel_SVC, "Size is not less than 8GB, 0x{:016X}", size);
-        return ERR_INVALID_SIZE;
-    }
-
-    const auto local_perms = static_cast<MemoryPermission>(local_permissions);
-    if (local_perms != MemoryPermission::Read && local_perms != MemoryPermission::ReadWrite) {
-        LOG_ERROR(Kernel_SVC,
-                  "Invalid local memory permissions, expected Read or ReadWrite but got "
-                  "local_permissions={}",
-                  static_cast<u32>(local_permissions));
-        return ERR_INVALID_MEMORY_PERMISSIONS;
-    }
-
-    const auto remote_perms = static_cast<MemoryPermission>(remote_permissions);
-    if (remote_perms != MemoryPermission::Read && remote_perms != MemoryPermission::ReadWrite &&
-        remote_perms != MemoryPermission::DontCare) {
-        LOG_ERROR(Kernel_SVC,
-                  "Invalid remote memory permissions, expected Read, ReadWrite or DontCare but got "
-                  "remote_permissions={}",
-                  static_cast<u32>(remote_permissions));
-        return ERR_INVALID_MEMORY_PERMISSIONS;
-    }
-
-    auto& kernel = system.Kernel();
-    auto process = kernel.CurrentProcess();
-    auto& handle_table = process->GetHandleTable();
-    auto shared_mem_handle = SharedMemory::Create(kernel, process, size, local_perms, remote_perms);
-
-    CASCADE_RESULT(*handle, handle_table.Create(shared_mem_handle));
-    return RESULT_SUCCESS;
-}
-
 static ResultCode CreateEvent(Core::System& system, Handle* write_handle, Handle* read_handle) {
     LOG_DEBUG(Kernel_SVC, "called");
 
@@ -2305,11 +1936,10 @@ static ResultCode GetProcessList(Core::System& system, u32* out_num_processes,
     }
 
     const auto& kernel = system.Kernel();
-    const auto& vm_manager = kernel.CurrentProcess()->VMManager();
     const auto total_copy_size = out_process_ids_size * sizeof(u64);
 
-    if (out_process_ids_size > 0 &&
-        !vm_manager.IsWithinAddressSpace(out_process_ids, total_copy_size)) {
+    if (out_process_ids_size > 0 && !kernel.CurrentProcess()->PageTable().IsInsideAddressSpace(
+                                        out_process_ids, total_copy_size)) {
         LOG_ERROR(Kernel_SVC, "Address range outside address space. begin=0x{:016X}, end=0x{:016X}",
                   out_process_ids, out_process_ids + total_copy_size);
         return ERR_INVALID_ADDRESS_STATE;
@@ -2345,11 +1975,10 @@ static ResultCode GetThreadList(Core::System& system, u32* out_num_threads, VAdd
     }
 
     const auto* const current_process = system.Kernel().CurrentProcess();
-    const auto& vm_manager = current_process->VMManager();
     const auto total_copy_size = out_thread_ids_size * sizeof(u64);
 
     if (out_thread_ids_size > 0 &&
-        !vm_manager.IsWithinAddressSpace(out_thread_ids, total_copy_size)) {
+        !current_process->PageTable().IsInsideAddressSpace(out_thread_ids, total_copy_size)) {
         LOG_ERROR(Kernel_SVC, "Address range outside address space. begin=0x{:016X}, end=0x{:016X}",
                   out_thread_ids, out_thread_ids + total_copy_size);
         return ERR_INVALID_ADDRESS_STATE;
@@ -2510,7 +2139,7 @@ static const FunctionDef SVC_Table_32[] = {
 static const FunctionDef SVC_Table_64[] = {
     {0x00, nullptr, "Unknown"},
     {0x01, SvcWrap64<SetHeapSize>, "SetHeapSize"},
-    {0x02, SvcWrap64<SetMemoryPermission>, "SetMemoryPermission"},
+    {0x02, nullptr, "SetMemoryPermission"},
     {0x03, SvcWrap64<SetMemoryAttribute>, "SetMemoryAttribute"},
     {0x04, SvcWrap64<MapMemory>, "MapMemory"},
     {0x05, SvcWrap64<UnmapMemory>, "UnmapMemory"},
@@ -2528,7 +2157,7 @@ static const FunctionDef SVC_Table_64[] = {
     {0x11, SvcWrap64<SignalEvent>, "SignalEvent"},
     {0x12, SvcWrap64<ClearEvent>, "ClearEvent"},
     {0x13, SvcWrap64<MapSharedMemory>, "MapSharedMemory"},
-    {0x14, SvcWrap64<UnmapSharedMemory>, "UnmapSharedMemory"},
+    {0x14, nullptr, "UnmapSharedMemory"},
     {0x15, SvcWrap64<CreateTransferMemory>, "CreateTransferMemory"},
     {0x16, SvcWrap64<CloseHandle>, "CloseHandle"},
     {0x17, SvcWrap64<ResetSignal>, "ResetSignal"},
@@ -2588,9 +2217,9 @@ static const FunctionDef SVC_Table_64[] = {
     {0x4D, nullptr, "SleepSystem"},
     {0x4E, nullptr, "ReadWriteRegister"},
     {0x4F, nullptr, "SetProcessActivity"},
-    {0x50, SvcWrap64<CreateSharedMemory>, "CreateSharedMemory"},
-    {0x51, SvcWrap64<MapTransferMemory>, "MapTransferMemory"},
-    {0x52, SvcWrap64<UnmapTransferMemory>, "UnmapTransferMemory"},
+    {0x50, nullptr, "CreateSharedMemory"},
+    {0x51, nullptr, "MapTransferMemory"},
+    {0x52, nullptr, "UnmapTransferMemory"},
     {0x53, nullptr, "CreateInterruptEvent"},
     {0x54, nullptr, "QueryPhysicalAddress"},
     {0x55, nullptr, "QueryIoMapping"},
@@ -2627,8 +2256,8 @@ static const FunctionDef SVC_Table_64[] = {
     {0x74, nullptr, "MapProcessMemory"},
     {0x75, nullptr, "UnmapProcessMemory"},
     {0x76, SvcWrap64<QueryProcessMemory>, "QueryProcessMemory"},
-    {0x77, SvcWrap64<MapProcessCodeMemory>, "MapProcessCodeMemory"},
-    {0x78, SvcWrap64<UnmapProcessCodeMemory>, "UnmapProcessCodeMemory"},
+    {0x77, nullptr, "MapProcessCodeMemory"},
+    {0x78, nullptr, "UnmapProcessCodeMemory"},
     {0x79, nullptr, "CreateProcess"},
     {0x7A, nullptr, "StartProcess"},
     {0x7B, nullptr, "TerminateProcess"},
@@ -2656,7 +2285,7 @@ static const FunctionDef* GetSVCInfo64(u32 func_num) {
 
 MICROPROFILE_DEFINE(Kernel_SVC, "Kernel", "SVC", MP_RGB(70, 200, 70));
 
-void CallSVC(Core::System& system, u32 immediate) {
+void Call(Core::System& system, u32 immediate) {
     MICROPROFILE_SCOPE(Kernel_SVC);
 
     // Lock the global kernel mutex when we enter the kernel HLE.
@@ -2675,4 +2304,4 @@ void CallSVC(Core::System& system, u32 immediate) {
     }
 }
 
-} // namespace Kernel
+} // namespace Kernel::Svc

src/core/hle/kernel/svc.h

@@ -10,8 +10,8 @@ namespace Core {
 class System;
 }
 
-namespace Kernel {
+namespace Kernel::Svc {
 
-void CallSVC(Core::System& system, u32 immediate);
+void Call(Core::System& system, u32 immediate);
 
-} // namespace Kernel
+} // namespace Kernel::Svc

src/core/hle/kernel/svc_types.h

@@ -0,0 +1,68 @@
+// Copyright 2020 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+
+namespace Kernel::Svc {
+
+enum class MemoryState : u32 {
+    Free = 0x00,
+    Io = 0x01,
+    Static = 0x02,
+    Code = 0x03,
+    CodeData = 0x04,
+    Normal = 0x05,
+    Shared = 0x06,
+    Alias = 0x07,
+    AliasCode = 0x08,
+    AliasCodeData = 0x09,
+    Ipc = 0x0A,
+    Stack = 0x0B,
+    ThreadLocal = 0x0C,
+    Transfered = 0x0D,
+    SharedTransfered = 0x0E,
+    SharedCode = 0x0F,
+    Inaccessible = 0x10,
+    NonSecureIpc = 0x11,
+    NonDeviceIpc = 0x12,
+    Kernel = 0x13,
+    GeneratedCode = 0x14,
+    CodeOut = 0x15,
+};
+DECLARE_ENUM_FLAG_OPERATORS(MemoryState);
+
+enum class MemoryAttribute : u32 {
+    Locked = (1 << 0),
+    IpcLocked = (1 << 1),
+    DeviceShared = (1 << 2),
+    Uncached = (1 << 3),
+};
+DECLARE_ENUM_FLAG_OPERATORS(MemoryAttribute);
+
+enum class MemoryPermission : u32 {
+    None = (0 << 0),
+    Read = (1 << 0),
+    Write = (1 << 1),
+    Execute = (1 << 2),
+    ReadWrite = Read | Write,
+    ReadExecute = Read | Execute,
+    DontCare = (1 << 28),
+};
+DECLARE_ENUM_FLAG_OPERATORS(MemoryPermission);
+
+struct MemoryInfo {
+    u64 addr{};
+    u64 size{};
+    MemoryState state{};
+    MemoryAttribute attr{};
+    MemoryPermission perm{};
+    u32 ipc_refcount{};
+    u32 device_refcount{};
+    u32 padding{};
+};
+
+} // namespace Kernel::Svc

src/core/hle/kernel/transfer_memory.cpp

@@ -2,17 +2,16 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#include "core/hle/kernel/errors.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/kernel/shared_memory.h"
 #include "core/hle/kernel/transfer_memory.h"
 #include "core/hle/result.h"
 #include "core/memory.h"
 
 namespace Kernel {
 
-TransferMemory::TransferMemory(KernelCore& kernel, Memory::Memory& memory)
+TransferMemory::TransferMemory(KernelCore& kernel, Core::Memory::Memory& memory)
     : Object{kernel}, memory{memory} {}
 
 TransferMemory::~TransferMemory() {
@@ -20,14 +19,15 @@ TransferMemory::~TransferMemory() {
     Reset();
 }
 
-std::shared_ptr<TransferMemory> TransferMemory::Create(KernelCore& kernel, Memory::Memory& memory,
-                                                       VAddr base_address, u64 size,
-                                                       MemoryPermission permissions) {
+std::shared_ptr<TransferMemory> TransferMemory::Create(KernelCore& kernel,
+                                                       Core::Memory::Memory& memory,
+                                                       VAddr base_address, std::size_t size,
+                                                       Memory::MemoryPermission permissions) {
     std::shared_ptr<TransferMemory> transfer_memory{
         std::make_shared<TransferMemory>(kernel, memory)};
 
     transfer_memory->base_address = base_address;
-    transfer_memory->memory_size = size;
+    transfer_memory->size = size;
     transfer_memory->owner_permissions = permissions;
     transfer_memory->owner_process = kernel.CurrentProcess();
 
@@ -38,98 +38,12 @@ const u8* TransferMemory::GetPointer() const {
     return memory.GetPointer(base_address);
 }
 
-u64 TransferMemory::GetSize() const {
-    return memory_size;
-}
-
-ResultCode TransferMemory::MapMemory(VAddr address, u64 size, MemoryPermission permissions) {
-    if (memory_size != size) {
-        return ERR_INVALID_SIZE;
-    }
-
-    if (owner_permissions != permissions) {
-        return ERR_INVALID_STATE;
-    }
-
-    if (is_mapped) {
-        return ERR_INVALID_STATE;
-    }
-
-    backing_block = std::make_shared<PhysicalMemory>(size);
-
-    const auto map_state = owner_permissions == MemoryPermission::None
-                               ? MemoryState::TransferMemoryIsolated
-                               : MemoryState::TransferMemory;
-    auto& vm_manager = owner_process->VMManager();
-    const auto map_result = vm_manager.MapMemoryBlock(address, backing_block, 0, size, map_state);
-    if (map_result.Failed()) {
-        return map_result.Code();
-    }
-
-    is_mapped = true;
-    return RESULT_SUCCESS;
-}
-
 ResultCode TransferMemory::Reserve() {
-    auto& vm_manager{owner_process->VMManager()};
-    const auto check_range_result{vm_manager.CheckRangeState(
-        base_address, memory_size, MemoryState::FlagTransfer | MemoryState::FlagMemoryPoolAllocated,
-        MemoryState::FlagTransfer | MemoryState::FlagMemoryPoolAllocated, VMAPermission::All,
-        VMAPermission::ReadWrite, MemoryAttribute::Mask, MemoryAttribute::None,
-        MemoryAttribute::IpcAndDeviceMapped)};
-
-    if (check_range_result.Failed()) {
-        return check_range_result.Code();
-    }
-
-    auto [state_, permissions_, attribute] = *check_range_result;
-
-    if (const auto result{vm_manager.ReprotectRange(
-            base_address, memory_size, SharedMemory::ConvertPermissions(owner_permissions))};
-        result.IsError()) {
-        return result;
-    }
-
-    return vm_manager.SetMemoryAttribute(base_address, memory_size, MemoryAttribute::Mask,
-                                         attribute | MemoryAttribute::Locked);
+    return owner_process->PageTable().ReserveTransferMemory(base_address, size, owner_permissions);
 }
 
 ResultCode TransferMemory::Reset() {
-    auto& vm_manager{owner_process->VMManager()};
-    if (const auto result{vm_manager.CheckRangeState(
-            base_address, memory_size,
-            MemoryState::FlagTransfer | MemoryState::FlagMemoryPoolAllocated,
-            MemoryState::FlagTransfer | MemoryState::FlagMemoryPoolAllocated, VMAPermission::None,
-            VMAPermission::None, MemoryAttribute::Mask, MemoryAttribute::Locked,
-            MemoryAttribute::IpcAndDeviceMapped)};
-        result.Failed()) {
-        return result.Code();
-    }
-
-    if (const auto result{
-            vm_manager.ReprotectRange(base_address, memory_size, VMAPermission::ReadWrite)};
-        result.IsError()) {
-        return result;
-    }
-
-    return vm_manager.SetMemoryAttribute(base_address, memory_size, MemoryAttribute::Mask,
-                                         MemoryAttribute::None);
-}
-
-ResultCode TransferMemory::UnmapMemory(VAddr address, u64 size) {
-    if (memory_size != size) {
-        return ERR_INVALID_SIZE;
-    }
-
-    auto& vm_manager = owner_process->VMManager();
-    const auto result = vm_manager.UnmapRange(address, size);
-
-    if (result.IsError()) {
-        return result;
-    }
-
-    is_mapped = false;
-    return RESULT_SUCCESS;
+    return owner_process->PageTable().ResetTransferMemory(base_address, size);
 }
 
 } // namespace Kernel

src/core/hle/kernel/transfer_memory.h

@@ -6,12 +6,13 @@
 
 #include <memory>
 
+#include "core/hle/kernel/memory/memory_block.h"
 #include "core/hle/kernel/object.h"
 #include "core/hle/kernel/physical_memory.h"
 
 union ResultCode;
 
-namespace Memory {
+namespace Core::Memory {
 class Memory;
 }
 
@@ -20,8 +21,6 @@ namespace Kernel {
 class KernelCore;
 class Process;
 
-enum class MemoryPermission : u32;
-
 /// Defines the interface for transfer memory objects.
 ///
 /// Transfer memory is typically used for the purpose of
@@ -30,14 +29,14 @@ enum class MemoryPermission : u32;
 ///
 class TransferMemory final : public Object {
 public:
-    explicit TransferMemory(KernelCore& kernel, Memory::Memory& memory);
+    explicit TransferMemory(KernelCore& kernel, Core::Memory::Memory& memory);
     ~TransferMemory() override;
 
     static constexpr HandleType HANDLE_TYPE = HandleType::TransferMemory;
 
-    static std::shared_ptr<TransferMemory> Create(KernelCore& kernel, Memory::Memory& memory,
-                                                  VAddr base_address, u64 size,
-                                                  MemoryPermission permissions);
+    static std::shared_ptr<TransferMemory> Create(KernelCore& kernel, Core::Memory::Memory& memory,
+                                                  VAddr base_address, std::size_t size,
+                                                  Memory::MemoryPermission permissions);
 
     TransferMemory(const TransferMemory&) = delete;
     TransferMemory& operator=(const TransferMemory&) = delete;
@@ -61,29 +60,9 @@ public:
     const u8* GetPointer() const;
 
     /// Gets the size of the memory backing this instance in bytes.
-    u64 GetSize() const;
-
-    /// Attempts to map transfer memory with the given range and memory permissions.
-    ///
-    /// @param address     The base address to being mapping memory at.
-    /// @param size        The size of the memory to map, in bytes.
-    /// @param permissions The memory permissions to check against when mapping memory.
-    ///
-    /// @pre The given address, size, and memory permissions must all match
-    ///      the same values that were given when creating the transfer memory
-    ///      instance.
-    ///
-    ResultCode MapMemory(VAddr address, u64 size, MemoryPermission permissions);
-
-    /// Unmaps the transfer memory with the given range
-    ///
-    /// @param address The base address to begin unmapping memory at.
-    /// @param size    The size of the memory to unmap, in bytes.
-    ///
-    /// @pre The given address and size must be the same as the ones used
-    ///      to create the transfer memory instance.
-    ///
-    ResultCode UnmapMemory(VAddr address, u64 size);
+    constexpr std::size_t GetSize() const {
+        return size;
+    }
 
     /// Reserves the region to be used for the transfer memory, called after the transfer memory is
     /// created.
@@ -94,25 +73,19 @@ public:
     ResultCode Reset();
 
 private:
-    /// Memory block backing this instance.
-    std::shared_ptr<PhysicalMemory> backing_block;
-
     /// The base address for the memory managed by this instance.
-    VAddr base_address = 0;
+    VAddr base_address{};
 
     /// Size of the memory, in bytes, that this instance manages.
-    u64 memory_size = 0;
+    std::size_t size{};
 
     /// The memory permissions that are applied to this instance.
-    MemoryPermission owner_permissions{};
+    Memory::MemoryPermission owner_permissions{};
 
     /// The process that this transfer memory instance was created under.
-    Process* owner_process = nullptr;
+    Process* owner_process{};
 
-    /// Whether or not this transfer memory instance has mapped memory.
-    bool is_mapped = false;
-
-    Memory::Memory& memory;
+    Core::Memory::Memory& memory;
 };
 
 } // namespace Kernel

src/core/hle/kernel/vm_manager.h

@@ -1,796 +0,0 @@
-// Copyright 2015 Citra Emulator Project
-// Licensed under GPLv2 or any later version
-// Refer to the license.txt file included.
-
-#pragma once
-
-#include <map>
-#include <memory>
-#include <tuple>
-#include <vector>
-#include "common/common_types.h"
-#include "common/memory_hook.h"
-#include "common/page_table.h"
-#include "core/hle/kernel/physical_memory.h"
-#include "core/hle/result.h"
-#include "core/memory.h"
-
-namespace Core {
-class System;
-}
-
-namespace FileSys {
-enum class ProgramAddressSpaceType : u8;
-}
-
-namespace Kernel {
-
-enum class VMAType : u8 {
-    /// VMA represents an unmapped region of the address space.
-    Free,
-    /// VMA is backed by a ref-counted allocate memory block.
-    AllocatedMemoryBlock,
-    /// VMA is backed by a raw, unmanaged pointer.
-    BackingMemory,
-    /// VMA is mapped to MMIO registers at a fixed PAddr.
-    MMIO,
-    // TODO(yuriks): Implement MemoryAlias to support MAP/UNMAP
-};
-
-/// Permissions for mapped memory blocks
-enum class VMAPermission : u8 {
-    None = 0,
-    Read = 1,
-    Write = 2,
-    Execute = 4,
-
-    ReadWrite = Read | Write,
-    ReadExecute = Read | Execute,
-    WriteExecute = Write | Execute,
-    ReadWriteExecute = Read | Write | Execute,
-
-    // Used as a wildcard when checking permissions across memory ranges
-    All = 0xFF,
-};
-
-constexpr VMAPermission operator|(VMAPermission lhs, VMAPermission rhs) {
-    return static_cast<VMAPermission>(u32(lhs) | u32(rhs));
-}
-
-constexpr VMAPermission operator&(VMAPermission lhs, VMAPermission rhs) {
-    return static_cast<VMAPermission>(u32(lhs) & u32(rhs));
-}
-
-constexpr VMAPermission operator^(VMAPermission lhs, VMAPermission rhs) {
-    return static_cast<VMAPermission>(u32(lhs) ^ u32(rhs));
-}
-
-constexpr VMAPermission operator~(VMAPermission permission) {
-    return static_cast<VMAPermission>(~u32(permission));
-}
-
-constexpr VMAPermission& operator|=(VMAPermission& lhs, VMAPermission rhs) {
-    lhs = lhs | rhs;
-    return lhs;
-}
-
-constexpr VMAPermission& operator&=(VMAPermission& lhs, VMAPermission rhs) {
-    lhs = lhs & rhs;
-    return lhs;
-}
-
-constexpr VMAPermission& operator^=(VMAPermission& lhs, VMAPermission rhs) {
-    lhs = lhs ^ rhs;
-    return lhs;
-}
-
-/// Attribute flags that can be applied to a VMA
-enum class MemoryAttribute : u32 {
-    Mask = 0xFF,
-
-    /// No particular qualities
-    None = 0,
-    /// Memory locked/borrowed for use. e.g. This would be used by transfer memory.
-    Locked = 1,
-    /// Memory locked for use by IPC-related internals.
-    LockedForIPC = 2,
-    /// Mapped as part of the device address space.
-    DeviceMapped = 4,
-    /// Uncached memory
-    Uncached = 8,
-
-    IpcAndDeviceMapped = LockedForIPC | DeviceMapped,
-};
-
-constexpr MemoryAttribute operator|(MemoryAttribute lhs, MemoryAttribute rhs) {
-    return static_cast<MemoryAttribute>(u32(lhs) | u32(rhs));
-}
-
-constexpr MemoryAttribute operator&(MemoryAttribute lhs, MemoryAttribute rhs) {
-    return static_cast<MemoryAttribute>(u32(lhs) & u32(rhs));
-}
-
-constexpr MemoryAttribute operator^(MemoryAttribute lhs, MemoryAttribute rhs) {
-    return static_cast<MemoryAttribute>(u32(lhs) ^ u32(rhs));
-}
-
-constexpr MemoryAttribute operator~(MemoryAttribute attribute) {
-    return static_cast<MemoryAttribute>(~u32(attribute));
-}
-
-constexpr MemoryAttribute& operator|=(MemoryAttribute& lhs, MemoryAttribute rhs) {
-    lhs = lhs | rhs;
-    return lhs;
-}
-
-constexpr MemoryAttribute& operator&=(MemoryAttribute& lhs, MemoryAttribute rhs) {
-    lhs = lhs & rhs;
-    return lhs;
-}
-
-constexpr MemoryAttribute& operator^=(MemoryAttribute& lhs, MemoryAttribute rhs) {
-    lhs = lhs ^ rhs;
-    return lhs;
-}
-
-constexpr u32 ToSvcMemoryAttribute(MemoryAttribute attribute) {
-    return static_cast<u32>(attribute & MemoryAttribute::Mask);
-}
-
-// clang-format off
-/// Represents memory states and any relevant flags, as used by the kernel.
-/// svcQueryMemory interprets these by masking away all but the first eight
-/// bits when storing memory state into a MemoryInfo instance.
-enum class MemoryState : u32 {
-    Mask                            = 0xFF,
-    FlagProtect                     = 1U << 8,
-    FlagDebug                       = 1U << 9,
-    FlagIPC0                        = 1U << 10,
-    FlagIPC3                        = 1U << 11,
-    FlagIPC1                        = 1U << 12,
-    FlagMapped                      = 1U << 13,
-    FlagCode                        = 1U << 14,
-    FlagAlias                       = 1U << 15,
-    FlagModule                      = 1U << 16,
-    FlagTransfer                    = 1U << 17,
-    FlagQueryPhysicalAddressAllowed = 1U << 18,
-    FlagSharedDevice                = 1U << 19,
-    FlagSharedDeviceAligned         = 1U << 20,
-    FlagIPCBuffer                   = 1U << 21,
-    FlagMemoryPoolAllocated         = 1U << 22,
-    FlagMapProcess                  = 1U << 23,
-    FlagUncached                    = 1U << 24,
-    FlagCodeMemory                  = 1U << 25,
-
-    // Wildcard used in range checking to indicate all states.
-    All                             = 0xFFFFFFFF,
-
-    // Convenience flag sets to reduce repetition
-    IPCFlags = FlagIPC0 | FlagIPC3 | FlagIPC1,
-
-    CodeFlags = FlagDebug | IPCFlags | FlagMapped | FlagCode | FlagQueryPhysicalAddressAllowed |
-                FlagSharedDevice | FlagSharedDeviceAligned | FlagMemoryPoolAllocated,
-
-    DataFlags = FlagProtect | IPCFlags | FlagMapped | FlagAlias | FlagTransfer |
-                FlagQueryPhysicalAddressAllowed | FlagSharedDevice | FlagSharedDeviceAligned |
-                FlagMemoryPoolAllocated | FlagIPCBuffer | FlagUncached,
-
-    Unmapped               = 0x00,
-    Io                     = 0x01 | FlagMapped,
-    Normal                 = 0x02 | FlagMapped | FlagQueryPhysicalAddressAllowed,
-    Code                   = 0x03 | CodeFlags  | FlagMapProcess,
-    CodeData               = 0x04 | DataFlags  | FlagMapProcess | FlagCodeMemory,
-    Heap                   = 0x05 | DataFlags  | FlagCodeMemory,
-    Shared                 = 0x06 | FlagMapped | FlagMemoryPoolAllocated,
-    ModuleCode             = 0x08 | CodeFlags  | FlagModule | FlagMapProcess,
-    ModuleCodeData         = 0x09 | DataFlags  | FlagModule | FlagMapProcess | FlagCodeMemory,
-
-    IpcBuffer0             = 0x0A | FlagMapped | FlagQueryPhysicalAddressAllowed | FlagMemoryPoolAllocated |
-                                    IPCFlags | FlagSharedDevice | FlagSharedDeviceAligned,
-
-    Stack                  = 0x0B | FlagMapped | IPCFlags | FlagQueryPhysicalAddressAllowed |
-                                    FlagSharedDevice | FlagSharedDeviceAligned | FlagMemoryPoolAllocated,
-
-    ThreadLocal            = 0x0C | FlagMapped | FlagMemoryPoolAllocated,
-
-    TransferMemoryIsolated = 0x0D | IPCFlags | FlagMapped | FlagQueryPhysicalAddressAllowed |
-                                    FlagSharedDevice | FlagSharedDeviceAligned | FlagMemoryPoolAllocated |
-                                    FlagUncached,
-
-    TransferMemory         = 0x0E | FlagIPC3   | FlagIPC1   | FlagMapped | FlagQueryPhysicalAddressAllowed |
-                                    FlagSharedDevice | FlagSharedDeviceAligned | FlagMemoryPoolAllocated,
-
-    ProcessMemory          = 0x0F | FlagIPC3   | FlagIPC1   | FlagMapped | FlagMemoryPoolAllocated,
-
-    // Used to signify an inaccessible or invalid memory region with memory queries
-    Inaccessible           = 0x10,
-
-    IpcBuffer1             = 0x11 | FlagIPC3   | FlagIPC1   | FlagMapped | FlagQueryPhysicalAddressAllowed |
-                                    FlagSharedDevice | FlagSharedDeviceAligned | FlagMemoryPoolAllocated,
-
-    IpcBuffer3             = 0x12 | FlagIPC3   | FlagMapped | FlagQueryPhysicalAddressAllowed |
-                                    FlagSharedDeviceAligned | FlagMemoryPoolAllocated,
-
-    KernelStack            = 0x13 | FlagMapped,
-};
-// clang-format on
-
-constexpr MemoryState operator|(MemoryState lhs, MemoryState rhs) {
-    return static_cast<MemoryState>(u32(lhs) | u32(rhs));
-}
-
-constexpr MemoryState operator&(MemoryState lhs, MemoryState rhs) {
-    return static_cast<MemoryState>(u32(lhs) & u32(rhs));
-}
-
-constexpr MemoryState operator^(MemoryState lhs, MemoryState rhs) {
-    return static_cast<MemoryState>(u32(lhs) ^ u32(rhs));
-}
-
-constexpr MemoryState operator~(MemoryState lhs) {
-    return static_cast<MemoryState>(~u32(lhs));
-}
-
-constexpr MemoryState& operator|=(MemoryState& lhs, MemoryState rhs) {
-    lhs = lhs | rhs;
-    return lhs;
-}
-
-constexpr MemoryState& operator&=(MemoryState& lhs, MemoryState rhs) {
-    lhs = lhs & rhs;
-    return lhs;
-}
-
-constexpr MemoryState& operator^=(MemoryState& lhs, MemoryState rhs) {
-    lhs = lhs ^ rhs;
-    return lhs;
-}
-
-constexpr u32 ToSvcMemoryState(MemoryState state) {
-    return static_cast<u32>(state & MemoryState::Mask);
-}
-
-struct MemoryInfo {
-    u64 base_address;
-    u64 size;
-    u32 state;
-    u32 attributes;
-    u32 permission;
-    u32 ipc_ref_count;
-    u32 device_ref_count;
-};
-static_assert(sizeof(MemoryInfo) == 0x28, "MemoryInfo has incorrect size.");
-
-struct PageInfo {
-    u32 flags;
-};
-
-/**
- * Represents a VMA in an address space. A VMA is a contiguous region of virtual addressing space
- * with homogeneous attributes across its extents. In this particular implementation each VMA is
- * also backed by a single host memory allocation.
- */
-struct VirtualMemoryArea {
-    /// Gets the starting (base) address of this VMA.
-    VAddr StartAddress() const {
-        return base;
-    }
-
-    /// Gets the ending address of this VMA.
-    VAddr EndAddress() const {
-        return base + size - 1;
-    }
-
-    /// Virtual base address of the region.
-    VAddr base = 0;
-    /// Size of the region.
-    u64 size = 0;
-
-    VMAType type = VMAType::Free;
-    VMAPermission permissions = VMAPermission::None;
-    MemoryState state = MemoryState::Unmapped;
-    MemoryAttribute attribute = MemoryAttribute::None;
-
-    // Settings for type = AllocatedMemoryBlock
-    /// Memory block backing this VMA.
-    std::shared_ptr<PhysicalMemory> backing_block = nullptr;
-    /// Offset into the backing_memory the mapping starts from.
-    std::size_t offset = 0;
-
-    // Settings for type = BackingMemory
-    /// Pointer backing this VMA. It will not be destroyed or freed when the VMA is removed.
-    u8* backing_memory = nullptr;
-
-    // Settings for type = MMIO
-    /// Physical address of the register area this VMA maps to.
-    PAddr paddr = 0;
-    Common::MemoryHookPointer mmio_handler = nullptr;
-
-    /// Tests if this area can be merged to the right with `next`.
-    bool CanBeMergedWith(const VirtualMemoryArea& next) const;
-};
-
-/**
- * Manages a process' virtual addressing space. This class maintains a list of allocated and free
- * regions in the address space, along with their attributes, and allows kernel clients to
- * manipulate it, adjusting the page table to match.
- *
- * This is similar in idea and purpose to the VM manager present in operating system kernels, with
- * the main difference being that it doesn't have to support swapping or memory mapping of files.
- * The implementation is also simplified by not having to allocate page frames. See these articles
- * about the Linux kernel for an explantion of the concept and implementation:
- *  - http://duartes.org/gustavo/blog/post/how-the-kernel-manages-your-memory/
- *  - http://duartes.org/gustavo/blog/post/page-cache-the-affair-between-memory-and-files/
- */
-class VMManager final {
-    using VMAMap = std::map<VAddr, VirtualMemoryArea>;
-
-public:
-    using VMAHandle = VMAMap::const_iterator;
-
-    explicit VMManager(Core::System& system);
-    ~VMManager();
-
-    /// Clears the address space map, re-initializing with a single free area.
-    void Reset(FileSys::ProgramAddressSpaceType type);
-
-    /// Finds the VMA in which the given address is included in, or `vma_map.end()`.
-    VMAHandle FindVMA(VAddr target) const;
-
-    /// Indicates whether or not the given handle is within the VMA map.
-    bool IsValidHandle(VMAHandle handle) const;
-
-    // TODO(yuriks): Should these functions actually return the handle?
-
-    /**
-     * Maps part of a ref-counted block of memory at a given address.
-     *
-     * @param target The guest address to start the mapping at.
-     * @param block The block to be mapped.
-     * @param offset Offset into `block` to map from.
-     * @param size Size of the mapping.
-     * @param state MemoryState tag to attach to the VMA.
-     */
-    ResultVal<VMAHandle> MapMemoryBlock(VAddr target, std::shared_ptr<PhysicalMemory> block,
-                                        std::size_t offset, u64 size, MemoryState state,
-                                        VMAPermission perm = VMAPermission::ReadWrite);
-
-    /**
-     * Maps an unmanaged host memory pointer at a given address.
-     *
-     * @param target The guest address to start the mapping at.
-     * @param memory The memory to be mapped.
-     * @param size Size of the mapping.
-     * @param state MemoryState tag to attach to the VMA.
-     */
-    ResultVal<VMAHandle> MapBackingMemory(VAddr target, u8* memory, u64 size, MemoryState state);
-
-    /**
-     * Finds the first free memory region of the given size within
-     * the user-addressable ASLR memory region.
-     *
-     * @param size The size of the desired region in bytes.
-     *
-     * @returns If successful, the base address of the free region with
-     *          the given size.
-     */
-    ResultVal<VAddr> FindFreeRegion(u64 size) const;
-
-    /**
-     * Finds the first free address range that can hold a region of the desired size
-     *
-     * @param begin The starting address of the range.
-     *              This is treated as an inclusive beginning address.
-     *
-     * @param end   The ending address of the range.
-     *              This is treated as an exclusive ending address.
-     *
-     * @param size  The size of the free region to attempt to locate,
-     *              in bytes.
-     *
-     * @returns If successful, the base address of the free region with
-     *          the given size.
-     *
-     * @returns If unsuccessful, a result containing an error code.
-     *
-     * @pre The starting address must be less than the ending address.
-     * @pre The size must not exceed the address range itself.
-     */
-    ResultVal<VAddr> FindFreeRegion(VAddr begin, VAddr end, u64 size) const;
-
-    /**
-     * Maps a memory-mapped IO region at a given address.
-     *
-     * @param target The guest address to start the mapping at.
-     * @param paddr The physical address where the registers are present.
-     * @param size Size of the mapping.
-     * @param state MemoryState tag to attach to the VMA.
-     * @param mmio_handler The handler that will implement read and write for this MMIO region.
-     */
-    ResultVal<VMAHandle> MapMMIO(VAddr target, PAddr paddr, u64 size, MemoryState state,
-                                 Common::MemoryHookPointer mmio_handler);
-
-    /// Unmaps a range of addresses, splitting VMAs as necessary.
-    ResultCode UnmapRange(VAddr target, u64 size);
-
-    /// Changes the permissions of the given VMA.
-    VMAHandle Reprotect(VMAHandle vma, VMAPermission new_perms);
-
-    /// Changes the permissions of a range of addresses, splitting VMAs as necessary.
-    ResultCode ReprotectRange(VAddr target, u64 size, VMAPermission new_perms);
-
-    ResultCode MirrorMemory(VAddr dst_addr, VAddr src_addr, u64 size, MemoryState state);
-
-    /// Attempts to allocate a heap with the given size.
-    ///
-    /// @param size The size of the heap to allocate in bytes.
-    ///
-    /// @note If a heap is currently allocated, and this is called
-    ///       with a size that is equal to the size of the current heap,
-    ///       then this function will do nothing and return the current
-    ///       heap's starting address, as there's no need to perform
-    ///       any additional heap allocation work.
-    ///
-    /// @note If a heap is currently allocated, and this is called
-    ///       with a size less than the current heap's size, then
-    ///       this function will attempt to shrink the heap.
-    ///
-    /// @note If a heap is currently allocated, and this is called
-    ///       with a size larger than the current heap's size, then
-    ///       this function will attempt to extend the size of the heap.
-    ///
-    /// @returns A result indicating either success or failure.
-    ///          <p>
-    ///          If successful, this function will return a result
-    ///          containing the starting address to the allocated heap.
-    ///          <p>
-    ///          If unsuccessful, this function will return a result
-    ///          containing an error code.
-    ///
-    /// @pre The given size must lie within the allowable heap
-    ///      memory region managed by this VMManager instance.
-    ///      Failure to abide by this will result in ERR_OUT_OF_MEMORY
-    ///      being returned as the result.
-    ///
-    ResultVal<VAddr> SetHeapSize(u64 size);
-
-    /// Maps memory at a given address.
-    ///
-    /// @param target The virtual address to map memory at.
-    /// @param size   The amount of memory to map.
-    ///
-    /// @note The destination address must lie within the Map region.
-    ///
-    /// @note This function requires that SystemResourceSize be non-zero,
-    ///       however, this is just because if it were not then the
-    ///       resulting page tables could be exploited on hardware by
-    ///       a malicious program. SystemResource usage does not need
-    ///       to be explicitly checked or updated here.
-    ResultCode MapPhysicalMemory(VAddr target, u64 size);
-
-    /// Unmaps memory at a given address.
-    ///
-    /// @param target The virtual address to unmap memory at.
-    /// @param size   The amount of memory to unmap.
-    ///
-    /// @note The destination address must lie within the Map region.
-    ///
-    /// @note This function requires that SystemResourceSize be non-zero,
-    ///       however, this is just because if it were not then the
-    ///       resulting page tables could be exploited on hardware by
-    ///       a malicious program. SystemResource usage does not need
-    ///       to be explicitly checked or updated here.
-    ResultCode UnmapPhysicalMemory(VAddr target, u64 size);
-
-    /// Maps a region of memory as code memory.
-    ///
-    /// @param dst_address The base address of the region to create the aliasing memory region.
-    /// @param src_address The base address of the region to be aliased.
-    /// @param size        The total amount of memory to map in bytes.
-    ///
-    /// @pre Both memory regions lie within the actual addressable address space.
-    ///
-    /// @post After this function finishes execution, assuming success, then the address range
-    ///       [dst_address, dst_address+size) will alias the memory region,
-    ///       [src_address, src_address+size).
-    ///       <p>
-    ///       What this also entails is as follows:
-    ///          1. The aliased region gains the Locked memory attribute.
-    ///          2. The aliased region becomes read-only.
-    ///          3. The aliasing region becomes read-only.
-    ///          4. The aliasing region is created with a memory state of MemoryState::CodeModule.
-    ///
-    ResultCode MapCodeMemory(VAddr dst_address, VAddr src_address, u64 size);
-
-    /// Unmaps a region of memory designated as code module memory.
-    ///
-    /// @param dst_address The base address of the memory region aliasing the source memory region.
-    /// @param src_address The base address of the memory region being aliased.
-    /// @param size        The size of the memory region to unmap in bytes.
-    ///
-    /// @pre Both memory ranges lie within the actual addressable address space.
-    ///
-    /// @pre The memory region being unmapped has been previously been mapped
-    ///      by a call to MapCodeMemory.
-    ///
-    /// @post After execution of the function, if successful. the aliasing memory region
-    ///       will be unmapped and the aliased region will have various traits about it
-    ///       restored to what they were prior to the original mapping call preceding
-    ///       this function call.
-    ///       <p>
-    ///       What this also entails is as follows:
-    ///           1. The state of the memory region will now indicate a general heap region.
-    ///           2. All memory attributes for the memory region are cleared.
-    ///           3. Memory permissions for the region are restored to user read/write.
-    ///
-    ResultCode UnmapCodeMemory(VAddr dst_address, VAddr src_address, u64 size);
-
-    /// Queries the memory manager for information about the given address.
-    ///
-    /// @param address The address to query the memory manager about for information.
-    ///
-    /// @return A MemoryInfo instance containing information about the given address.
-    ///
-    MemoryInfo QueryMemory(VAddr address) const;
-
-    /// Sets an attribute across the given address range.
-    ///
-    /// @param address   The starting address
-    /// @param size      The size of the range to set the attribute on.
-    /// @param mask      The attribute mask
-    /// @param attribute The attribute to set across the given address range
-    ///
-    /// @returns RESULT_SUCCESS if successful
-    /// @returns ERR_INVALID_ADDRESS_STATE if the attribute could not be set.
-    ///
-    ResultCode SetMemoryAttribute(VAddr address, u64 size, MemoryAttribute mask,
-                                  MemoryAttribute attribute);
-
-    /**
-     * Scans all VMAs and updates the page table range of any that use the given vector as backing
-     * memory. This should be called after any operation that causes reallocation of the vector.
-     */
-    void RefreshMemoryBlockMappings(const PhysicalMemory* block);
-
-    /// Dumps the address space layout to the log, for debugging
-    void LogLayout() const;
-
-    /// Gets the total memory usage, used by svcGetInfo
-    u64 GetTotalPhysicalMemoryAvailable() const;
-
-    /// Gets the address space base address
-    VAddr GetAddressSpaceBaseAddress() const;
-
-    /// Gets the address space end address
-    VAddr GetAddressSpaceEndAddress() const;
-
-    /// Gets the total address space address size in bytes
-    u64 GetAddressSpaceSize() const;
-
-    /// Gets the address space width in bits.
-    u64 GetAddressSpaceWidth() const;
-
-    /// Determines whether or not the given address range lies within the address space.
-    bool IsWithinAddressSpace(VAddr address, u64 size) const;
-
-    /// Gets the base address of the ASLR region.
-    VAddr GetASLRRegionBaseAddress() const;
-
-    /// Gets the end address of the ASLR region.
-    VAddr GetASLRRegionEndAddress() const;
-
-    /// Gets the size of the ASLR region
-    u64 GetASLRRegionSize() const;
-
-    /// Determines whether or not the specified address range is within the ASLR region.
-    bool IsWithinASLRRegion(VAddr address, u64 size) const;
-
-    /// Gets the base address of the code region.
-    VAddr GetCodeRegionBaseAddress() const;
-
-    /// Gets the end address of the code region.
-    VAddr GetCodeRegionEndAddress() const;
-
-    /// Gets the total size of the code region in bytes.
-    u64 GetCodeRegionSize() const;
-
-    /// Determines whether or not the specified range is within the code region.
-    bool IsWithinCodeRegion(VAddr address, u64 size) const;
-
-    /// Gets the base address of the heap region.
-    VAddr GetHeapRegionBaseAddress() const;
-
-    /// Gets the end address of the heap region;
-    VAddr GetHeapRegionEndAddress() const;
-
-    /// Gets the total size of the heap region in bytes.
-    u64 GetHeapRegionSize() const;
-
-    /// Gets the total size of the current heap in bytes.
-    ///
-    /// @note This is the current allocated heap size, not the size
-    ///       of the region it's allowed to exist within.
-    ///
-    u64 GetCurrentHeapSize() const;
-
-    /// Determines whether or not the specified range is within the heap region.
-    bool IsWithinHeapRegion(VAddr address, u64 size) const;
-
-    /// Gets the base address of the map region.
-    VAddr GetMapRegionBaseAddress() const;
-
-    /// Gets the end address of the map region.
-    VAddr GetMapRegionEndAddress() const;
-
-    /// Gets the total size of the map region in bytes.
-    u64 GetMapRegionSize() const;
-
-    /// Determines whether or not the specified range is within the map region.
-    bool IsWithinMapRegion(VAddr address, u64 size) const;
-
-    /// Gets the base address of the stack region.
-    VAddr GetStackRegionBaseAddress() const;
-
-    /// Gets the end address of the stack region.
-    VAddr GetStackRegionEndAddress() const;
-
-    /// Gets the total size of the stack region in bytes.
-    u64 GetStackRegionSize() const;
-
-    /// Determines whether or not the given address range is within the stack region
-    bool IsWithinStackRegion(VAddr address, u64 size) const;
-
-    /// Gets the base address of the TLS IO region.
-    VAddr GetTLSIORegionBaseAddress() const;
-
-    /// Gets the end address of the TLS IO region.
-    VAddr GetTLSIORegionEndAddress() const;
-
-    /// Gets the total size of the TLS IO region in bytes.
-    u64 GetTLSIORegionSize() const;
-
-    /// Determines if the given address range is within the TLS IO region.
-    bool IsWithinTLSIORegion(VAddr address, u64 size) const;
-
-    /// Each VMManager has its own page table, which is set as the main one when the owning process
-    /// is scheduled.
-    Common::PageTable page_table{Memory::PAGE_BITS};
-
-    using CheckResults = ResultVal<std::tuple<MemoryState, VMAPermission, MemoryAttribute>>;
-
-    /// Checks if an address range adheres to the specified states provided.
-    ///
-    /// @param address         The starting address of the address range.
-    /// @param size            The size of the address range.
-    /// @param state_mask      The memory state mask.
-    /// @param state           The state to compare the individual VMA states against,
-    ///                        which is done in the form of: (vma.state & state_mask) != state.
-    /// @param permission_mask The memory permissions mask.
-    /// @param permissions     The permission to compare the individual VMA permissions against,
-    ///                        which is done in the form of:
-    ///                        (vma.permission & permission_mask) != permission.
-    /// @param attribute_mask  The memory attribute mask.
-    /// @param attribute       The memory attributes to compare the individual VMA attributes
-    ///                        against, which is done in the form of:
-    ///                        (vma.attributes & attribute_mask) != attribute.
-    /// @param ignore_mask     The memory attributes to ignore during the check.
-    ///
-    /// @returns If successful, returns a tuple containing the memory attributes
-    ///          (with ignored bits specified by ignore_mask unset), memory permissions, and
-    ///          memory state across the memory range.
-    /// @returns If not successful, returns ERR_INVALID_ADDRESS_STATE.
-    ///
-    CheckResults CheckRangeState(VAddr address, u64 size, MemoryState state_mask, MemoryState state,
-                                 VMAPermission permission_mask, VMAPermission permissions,
-                                 MemoryAttribute attribute_mask, MemoryAttribute attribute,
-                                 MemoryAttribute ignore_mask) const;
-
-private:
-    using VMAIter = VMAMap::iterator;
-
-    /// Converts a VMAHandle to a mutable VMAIter.
-    VMAIter StripIterConstness(const VMAHandle& iter);
-
-    /// Unmaps the given VMA.
-    VMAIter Unmap(VMAIter vma);
-
-    /**
-     * Carves a VMA of a specific size at the specified address by splitting Free VMAs while doing
-     * the appropriate error checking.
-     */
-    ResultVal<VMAIter> CarveVMA(VAddr base, u64 size);
-
-    /**
-     * Splits the edges of the given range of non-Free VMAs so that there is a VMA split at each
-     * end of the range.
-     */
-    ResultVal<VMAIter> CarveVMARange(VAddr base, u64 size);
-
-    /**
-     * Splits a VMA in two, at the specified offset.
-     * @returns the right side of the split, with the original iterator becoming the left side.
-     */
-    VMAIter SplitVMA(VMAIter vma, u64 offset_in_vma);
-
-    /**
-     * Checks for and merges the specified VMA with adjacent ones if possible.
-     * @returns the merged VMA or the original if no merging was possible.
-     */
-    VMAIter MergeAdjacent(VMAIter vma);
-
-    /**
-     * Merges two adjacent VMAs.
-     */
-    void MergeAdjacentVMA(VirtualMemoryArea& left, const VirtualMemoryArea& right);
-
-    /// Updates the pages corresponding to this VMA so they match the VMA's attributes.
-    void UpdatePageTableForVMA(const VirtualMemoryArea& vma);
-
-    /// Initializes memory region ranges to adhere to a given address space type.
-    void InitializeMemoryRegionRanges(FileSys::ProgramAddressSpaceType type);
-
-    /// Clears the underlying map and page table.
-    void Clear();
-
-    /// Clears out the VMA map, unmapping any previously mapped ranges.
-    void ClearVMAMap();
-
-    /// Clears out the page table
-    void ClearPageTable();
-
-    /// Gets the amount of memory currently mapped (state != Unmapped) in a range.
-    ResultVal<std::size_t> SizeOfAllocatedVMAsInRange(VAddr address, std::size_t size) const;
-
-    /// Gets the amount of memory unmappable by UnmapPhysicalMemory in a range.
-    ResultVal<std::size_t> SizeOfUnmappablePhysicalMemoryInRange(VAddr address,
-                                                                 std::size_t size) const;
-
-    /**
-     * A map covering the entirety of the managed address space, keyed by the `base` field of each
-     * VMA. It must always be modified by splitting or merging VMAs, so that the invariant
-     * `elem.base + elem.size == next.base` is preserved, and mergeable regions must always be
-     * merged when possible so that no two similar and adjacent regions exist that have not been
-     * merged.
-     */
-    VMAMap vma_map;
-
-    u32 address_space_width = 0;
-    VAddr address_space_base = 0;
-    VAddr address_space_end = 0;
-
-    VAddr aslr_region_base = 0;
-    VAddr aslr_region_end = 0;
-
-    VAddr code_region_base = 0;
-    VAddr code_region_end = 0;
-
-    VAddr heap_region_base = 0;
-    VAddr heap_region_end = 0;
-
-    VAddr map_region_base = 0;
-    VAddr map_region_end = 0;
-
-    VAddr stack_region_base = 0;
-    VAddr stack_region_end = 0;
-
-    VAddr tls_io_region_base = 0;
-    VAddr tls_io_region_end = 0;
-
-    // Memory used to back the allocations in the regular heap. A single vector is used to cover
-    // the entire virtual address space extents that bound the allocations, including any holes.
-    // This makes deallocation and reallocation of holes fast and keeps process memory contiguous
-    // in the emulator address space, allowing Memory::GetPointer to be reasonably safe.
-    std::shared_ptr<PhysicalMemory> heap_memory;
-
-    // The end of the currently allocated heap. This is not an inclusive
-    // end of the range. This is essentially 'base_address + current_size'.
-    VAddr heap_end = 0;
-
-    // The current amount of memory mapped via MapPhysicalMemory.
-    // This is used here (and in Nintendo's kernel) only for debugging, and does not impact
-    // any behavior.
-    u64 physical_memory_mapped = 0;
-
-    Core::System& system;
-};
-} // namespace Kernel

src/core/hle/service/audio/audout_u.cpp

@@ -210,7 +210,7 @@ private:
 
     /// This is the event handle used to check if the audio buffer was released
     Kernel::EventPair buffer_event;
-    Memory::Memory& main_memory;
+    Core::Memory::Memory& main_memory;
 };
 
 AudOutU::AudOutU(Core::System& system_) : ServiceFramework("audout:u"), system{system_} {

src/core/hle/service/hid/hid.cpp

@@ -14,6 +14,7 @@
 #include "core/hle/ipc_helpers.h"
 #include "core/hle/kernel/client_port.h"
 #include "core/hle/kernel/client_session.h"
+#include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/readable_event.h"
 #include "core/hle/kernel/shared_memory.h"
 #include "core/hle/kernel/writable_event.h"
@@ -53,9 +54,7 @@ IAppletResource::IAppletResource(Core::System& system)
     RegisterHandlers(functions);
 
     auto& kernel = system.Kernel();
-    shared_mem = Kernel::SharedMemory::Create(
-        kernel, nullptr, SHARED_MEMORY_SIZE, Kernel::MemoryPermission::ReadWrite,
-        Kernel::MemoryPermission::Read, 0, Kernel::MemoryRegion::BASE, "HID:SharedMemory");
+    shared_mem = SharedFrom(&kernel.GetHidSharedMem());
 
     MakeController<Controller_DebugPad>(HidController::DebugPad);
     MakeController<Controller_Touchscreen>(HidController::Touchscreen);

src/core/hle/service/hid/irs.cpp

@@ -6,6 +6,7 @@
 #include "core/core.h"
 #include "core/core_timing.h"
 #include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/shared_memory.h"
 #include "core/hle/service/hid/irs.h"
 
@@ -38,9 +39,8 @@ IRS::IRS(Core::System& system) : ServiceFramework{"irs"}, system(system) {
     RegisterHandlers(functions);
 
     auto& kernel = system.Kernel();
-    shared_mem = Kernel::SharedMemory::Create(
-        kernel, nullptr, 0x8000, Kernel::MemoryPermission::ReadWrite,
-        Kernel::MemoryPermission::Read, 0, Kernel::MemoryRegion::BASE, "IRS:SharedMemory");
+
+    shared_mem = SharedFrom(&kernel.GetIrsSharedMem());
 }
 
 void IRS::ActivateIrsensor(Kernel::HLERequestContext& ctx) {

src/core/hle/service/ldr/ldr.cpp

@@ -8,14 +8,21 @@
 
 #include "common/alignment.h"
 #include "common/hex_util.h"
+#include "common/scope_exit.h"
 #include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/errors.h"
+#include "core/hle/kernel/memory/page_table.h"
+#include "core/hle/kernel/memory/system_control.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/service/ldr/ldr.h"
 #include "core/hle/service/service.h"
 #include "core/loader/nro.h"
+#include "core/memory.h"
 
 namespace Service::LDR {
 
+constexpr ResultCode ERROR_INSUFFICIENT_ADDRESS_SPACE{ErrorModule::RO, 2};
+
 constexpr ResultCode ERROR_INVALID_MEMORY_STATE{ErrorModule::Loader, 51};
 constexpr ResultCode ERROR_INVALID_NRO{ErrorModule::Loader, 52};
 constexpr ResultCode ERROR_INVALID_NRR{ErrorModule::Loader, 53};
@@ -29,7 +36,61 @@ constexpr ResultCode ERROR_INVALID_NRO_ADDRESS{ErrorModule::Loader, 84};
 constexpr ResultCode ERROR_INVALID_NRR_ADDRESS{ErrorModule::Loader, 85};
 constexpr ResultCode ERROR_NOT_INITIALIZED{ErrorModule::Loader, 87};
 
-constexpr u64 MAXIMUM_LOADED_RO = 0x40;
+constexpr std::size_t MAXIMUM_LOADED_RO{0x40};
+constexpr std::size_t MAXIMUM_MAP_RETRIES{0x200};
+
+struct NRRHeader {
+    u32_le magic;
+    INSERT_PADDING_BYTES(12);
+    u64_le title_id_mask;
+    u64_le title_id_pattern;
+    INSERT_PADDING_BYTES(16);
+    std::array<u8, 0x100> modulus;
+    std::array<u8, 0x100> signature_1;
+    std::array<u8, 0x100> signature_2;
+    u64_le title_id;
+    u32_le size;
+    INSERT_PADDING_BYTES(4);
+    u32_le hash_offset;
+    u32_le hash_count;
+    INSERT_PADDING_BYTES(8);
+};
+static_assert(sizeof(NRRHeader) == 0x350, "NRRHeader has incorrect size.");
+
+struct NROHeader {
+    INSERT_PADDING_WORDS(1);
+    u32_le mod_offset;
+    INSERT_PADDING_WORDS(2);
+    u32_le magic;
+    u32_le version;
+    u32_le nro_size;
+    u32_le flags;
+    u32_le text_offset;
+    u32_le text_size;
+    u32_le ro_offset;
+    u32_le ro_size;
+    u32_le rw_offset;
+    u32_le rw_size;
+    u32_le bss_size;
+    INSERT_PADDING_WORDS(1);
+    std::array<u8, 0x20> build_id;
+    INSERT_PADDING_BYTES(0x20);
+};
+static_assert(sizeof(NROHeader) == 0x80, "NROHeader has invalid size.");
+
+using SHA256Hash = std::array<u8, 0x20>;
+
+struct NROInfo {
+    SHA256Hash hash{};
+    VAddr nro_address{};
+    std::size_t nro_size{};
+    VAddr bss_address{};
+    std::size_t bss_size{};
+    std::size_t text_size{};
+    std::size_t ro_size{};
+    std::size_t data_size{};
+    VAddr src_addr{};
+};
 
 class DebugMonitor final : public ServiceFramework<DebugMonitor> {
 public:
@@ -84,7 +145,7 @@ public:
             {0, &RelocatableObject::LoadNro, "LoadNro"},
             {1, &RelocatableObject::UnloadNro, "UnloadNro"},
             {2, &RelocatableObject::LoadNrr, "LoadNrr"},
-            {3, &RelocatableObject::UnloadNrr, "UnloadNrr"},
+            {3, nullptr, "UnloadNrr"},
             {4, &RelocatableObject::Initialize, "Initialize"},
             {10, nullptr, "LoadNrrEx"},
         };
@@ -190,46 +251,125 @@ public:
         rb.Push(RESULT_SUCCESS);
     }
 
-    void UnloadNrr(Kernel::HLERequestContext& ctx) {
-        if (!initialized) {
-            LOG_ERROR(Service_LDR, "LDR:RO not initialized before use!");
-            IPC::ResponseBuilder rb{ctx, 2};
-            rb.Push(ERROR_NOT_INITIALIZED);
-            return;
+    bool ValidateRegionForMap(Kernel::Memory::PageTable& page_table, VAddr start,
+                              std::size_t size) const {
+        constexpr std::size_t padding_size{4 * Kernel::Memory::PageSize};
+        const auto start_info{page_table.QueryInfo(start - 1)};
+
+        if (start_info.state != Kernel::Memory::MemoryState::Free) {
+            return {};
         }
 
-        struct Parameters {
-            u64_le process_id;
-            u64_le nrr_address;
-        };
-
-        IPC::RequestParser rp{ctx};
-        const auto [process_id, nrr_address] = rp.PopRaw<Parameters>();
-
-        LOG_DEBUG(Service_LDR, "called with process_id={:016X}, nrr_addr={:016X}", process_id,
-                  nrr_address);
-
-        if (!Common::Is4KBAligned(nrr_address)) {
-            LOG_ERROR(Service_LDR, "NRR Address has invalid alignment (actual {:016X})!",
-                      nrr_address);
-            IPC::ResponseBuilder rb{ctx, 2};
-            rb.Push(ERROR_INVALID_ALIGNMENT);
-            return;
+        if (start_info.GetAddress() > (start - padding_size)) {
+            return {};
         }
 
-        const auto iter = nrr.find(nrr_address);
-        if (iter == nrr.end()) {
-            LOG_ERROR(Service_LDR,
-                      "Attempting to unload NRR which has not been loaded! (addr={:016X})",
-                      nrr_address);
-            IPC::ResponseBuilder rb{ctx, 2};
-            rb.Push(ERROR_INVALID_NRR_ADDRESS);
-            return;
+        const auto end_info{page_table.QueryInfo(start + size)};
+
+        if (end_info.state != Kernel::Memory::MemoryState::Free) {
+            return {};
         }
 
-        nrr.erase(iter);
-        IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(RESULT_SUCCESS);
+        return (start + size + padding_size) <= (end_info.GetAddress() + end_info.GetSize());
+    }
+
+    VAddr GetRandomMapRegion(const Kernel::Memory::PageTable& page_table, std::size_t size) const {
+        VAddr addr{};
+        const std::size_t end_pages{(page_table.GetAliasCodeRegionSize() - size) >>
+                                    Kernel::Memory::PageBits};
+        do {
+            addr = page_table.GetAliasCodeRegionStart() +
+                   (Kernel::Memory::SystemControl::GenerateRandomRange(0, end_pages)
+                    << Kernel::Memory::PageBits);
+        } while (!page_table.IsInsideAddressSpace(addr, size) ||
+                 page_table.IsInsideHeapRegion(addr, size) ||
+                 page_table.IsInsideAliasRegion(addr, size));
+        return addr;
+    }
+
+    ResultVal<VAddr> MapProcessCodeMemory(Kernel::Process* process, VAddr baseAddress,
+                                          u64 size) const {
+        for (int retry{}; retry < MAXIMUM_MAP_RETRIES; retry++) {
+            auto& page_table{process->PageTable()};
+            const VAddr addr{GetRandomMapRegion(page_table, size)};
+            const ResultCode result{page_table.MapProcessCodeMemory(addr, baseAddress, size)};
+
+            if (result == Kernel::ERR_INVALID_ADDRESS_STATE) {
+                continue;
+            }
+
+            CASCADE_CODE(result);
+
+            if (ValidateRegionForMap(page_table, addr, size)) {
+                return MakeResult<VAddr>(addr);
+            }
+        }
+
+        return ERROR_INSUFFICIENT_ADDRESS_SPACE;
+    }
+
+    ResultVal<VAddr> MapNro(Kernel::Process* process, VAddr nro_addr, std::size_t nro_size,
+                            VAddr bss_addr, std::size_t bss_size, std::size_t size) const {
+
+        for (int retry{}; retry < MAXIMUM_MAP_RETRIES; retry++) {
+            auto& page_table{process->PageTable()};
+            VAddr addr{};
+
+            CASCADE_RESULT(addr, MapProcessCodeMemory(process, nro_addr, nro_size));
+
+            if (bss_size) {
+                auto block_guard = detail::ScopeExit([&] {
+                    page_table.UnmapProcessCodeMemory(addr + nro_size, bss_addr, bss_size);
+                    page_table.UnmapProcessCodeMemory(addr, nro_addr, nro_size);
+                });
+
+                const ResultCode result{
+                    page_table.MapProcessCodeMemory(addr + nro_size, bss_addr, bss_size)};
+
+                if (result == Kernel::ERR_INVALID_ADDRESS_STATE) {
+                    continue;
+                }
+
+                if (result.IsError()) {
+                    return result;
+                }
+
+                block_guard.Cancel();
+            }
+
+            if (ValidateRegionForMap(page_table, addr, size)) {
+                return MakeResult<VAddr>(addr);
+            }
+        }
+
+        return ERROR_INSUFFICIENT_ADDRESS_SPACE;
+    }
+
+    ResultCode LoadNro(Kernel::Process* process, const NROHeader& nro_header, VAddr nro_addr,
+                       VAddr start) const {
+        const VAddr text_start{start + nro_header.text_offset};
+        const VAddr ro_start{start + nro_header.ro_offset};
+        const VAddr data_start{start + nro_header.rw_offset};
+        const VAddr bss_start{data_start + nro_header.rw_size};
+        const VAddr bss_end_addr{
+            Common::AlignUp(bss_start + nro_header.bss_size, Kernel::Memory::PageSize)};
+
+        auto CopyCode{[&](VAddr src_addr, VAddr dst_addr, u64 size) {
+            std::vector<u8> source_data(size);
+            system.Memory().ReadBlock(src_addr, source_data.data(), source_data.size());
+            system.Memory().WriteBlock(dst_addr, source_data.data(), source_data.size());
+        }};
+        CopyCode(nro_addr + nro_header.text_offset, text_start, nro_header.text_size);
+        CopyCode(nro_addr + nro_header.ro_offset, ro_start, nro_header.ro_size);
+        CopyCode(nro_addr + nro_header.rw_offset, data_start, nro_header.rw_size);
+
+        CASCADE_CODE(process->PageTable().SetCodeMemoryPermission(
+            text_start, ro_start - text_start, Kernel::Memory::MemoryPermission::ReadAndExecute));
+        CASCADE_CODE(process->PageTable().SetCodeMemoryPermission(
+            ro_start, data_start - ro_start, Kernel::Memory::MemoryPermission::Read));
+
+        return process->PageTable().SetCodeMemoryPermission(
+            data_start, bss_end_addr - data_start, Kernel::Memory::MemoryPermission::ReadAndWrite);
     }
 
     void LoadNro(Kernel::HLERequestContext& ctx) {
@@ -317,9 +457,9 @@ public:
             return;
         }
 
-        NROHeader header;
+        // Load and validate the NRO header
+        NROHeader header{};
         std::memcpy(&header, nro_data.data(), sizeof(NROHeader));
-
         if (!IsValidNRO(header, nro_size, bss_size)) {
             LOG_ERROR(Service_LDR, "NRO was invalid!");
             IPC::ResponseBuilder rb{ctx, 2};
@@ -327,62 +467,48 @@ public:
             return;
         }
 
-        // Load NRO as new executable module
-        auto* process = system.CurrentProcess();
-        auto& vm_manager = process->VMManager();
-        auto map_address = vm_manager.FindFreeRegion(nro_size + bss_size);
-
-        if (!map_address.Succeeded() ||
-            *map_address + nro_size + bss_size > vm_manager.GetAddressSpaceEndAddress()) {
-
-            LOG_ERROR(Service_LDR,
-                      "General error while allocation memory or no available memory to allocate!");
+        // Map memory for the NRO
+        const auto map_result{MapNro(system.CurrentProcess(), nro_address, nro_size, bss_address,
+                                     bss_size, nro_size + bss_size)};
+        if (map_result.Failed()) {
             IPC::ResponseBuilder rb{ctx, 2};
-            rb.Push(ERROR_INVALID_MEMORY_STATE);
-            return;
+            rb.Push(map_result.Code());
         }
 
-        // Mark text and read-only region as ModuleCode
-        ASSERT(vm_manager
-                   .MirrorMemory(*map_address, nro_address, header.text_size + header.ro_size,
-                                 Kernel::MemoryState::ModuleCode)
-                   .IsSuccess());
-        // Mark read/write region as ModuleCodeData, which is necessary if this region is used for
-        // TransferMemory (e.g. Final Fantasy VIII Remastered does this)
-        ASSERT(vm_manager
-                   .MirrorMemory(*map_address + header.rw_offset, nro_address + header.rw_offset,
-                                 header.rw_size, Kernel::MemoryState::ModuleCodeData)
-                   .IsSuccess());
-        // Revoke permissions from the old memory region
-        ASSERT(vm_manager.ReprotectRange(nro_address, nro_size, Kernel::VMAPermission::None)
-                   .IsSuccess());
-
-        if (bss_size > 0) {
-            // Mark BSS region as ModuleCodeData, which is necessary if this region is used for
-            // TransferMemory (e.g. Final Fantasy VIII Remastered does this)
-            ASSERT(vm_manager
-                       .MirrorMemory(*map_address + nro_size, bss_address, bss_size,
-                                     Kernel::MemoryState::ModuleCodeData)
-                       .IsSuccess());
-            ASSERT(vm_manager.ReprotectRange(bss_address, bss_size, Kernel::VMAPermission::None)
-                       .IsSuccess());
+        // Load the NRO into the mapped memory
+        if (const auto result{LoadNro(system.CurrentProcess(), header, nro_address, *map_result)};
+            result.IsError()) {
+            IPC::ResponseBuilder rb{ctx, 2};
+            rb.Push(map_result.Code());
         }
 
-        vm_manager.ReprotectRange(*map_address, header.text_size,
-                                  Kernel::VMAPermission::ReadExecute);
-        vm_manager.ReprotectRange(*map_address + header.ro_offset, header.ro_size,
-                                  Kernel::VMAPermission::Read);
-        vm_manager.ReprotectRange(*map_address + header.rw_offset, header.rw_size,
-                                  Kernel::VMAPermission::ReadWrite);
+        // Track the loaded NRO
+        nro.insert_or_assign(*map_result, NROInfo{hash, *map_result, nro_size, bss_address,
+                                                  bss_size, header.text_size, header.ro_size,
+                                                  header.rw_size, nro_address});
 
+        // Invalidate JIT caches for the newly mapped process code
         system.InvalidateCpuInstructionCaches();
 
-        nro.insert_or_assign(*map_address,
-                             NROInfo{hash, nro_address, nro_size, bss_address, bss_size});
-
         IPC::ResponseBuilder rb{ctx, 4};
         rb.Push(RESULT_SUCCESS);
-        rb.Push(*map_address);
+        rb.Push(*map_result);
+    }
+
+    ResultCode UnmapNro(const NROInfo& info) {
+        // Each region must be unmapped separately to validate memory state
+        auto& page_table{system.CurrentProcess()->PageTable()};
+        CASCADE_CODE(page_table.UnmapProcessCodeMemory(info.nro_address + info.text_size +
+                                                           info.ro_size + info.data_size,
+                                                       info.bss_address, info.bss_size));
+        CASCADE_CODE(page_table.UnmapProcessCodeMemory(
+            info.nro_address + info.text_size + info.ro_size,
+            info.src_addr + info.text_size + info.ro_size, info.data_size));
+        CASCADE_CODE(page_table.UnmapProcessCodeMemory(
+            info.nro_address + info.text_size, info.src_addr + info.text_size, info.ro_size));
+        CASCADE_CODE(
+            page_table.UnmapProcessCodeMemory(info.nro_address, info.src_addr, info.text_size));
+        return RESULT_SUCCESS;
     }
 
     void UnloadNro(Kernel::HLERequestContext& ctx) {
@@ -422,30 +548,15 @@ public:
             return;
         }
 
-        auto& vm_manager = system.CurrentProcess()->VMManager();
-        const auto& nro_info = iter->second;
-
-        // Unmap the mirrored memory
-        ASSERT(
-            vm_manager.UnmapRange(nro_address, nro_info.nro_size + nro_info.bss_size).IsSuccess());
-
-        // Reprotect the source memory
-        ASSERT(vm_manager
-                   .ReprotectRange(nro_info.nro_address, nro_info.nro_size,
-                                   Kernel::VMAPermission::ReadWrite)
-                   .IsSuccess());
-        if (nro_info.bss_size > 0) {
-            ASSERT(vm_manager
-                       .ReprotectRange(nro_info.bss_address, nro_info.bss_size,
-                                       Kernel::VMAPermission::ReadWrite)
-                       .IsSuccess());
-        }
+        const auto result{UnmapNro(iter->second)};
 
         system.InvalidateCpuInstructionCaches();
 
         nro.erase(iter);
+
         IPC::ResponseBuilder rb{ctx, 2};
-        rb.Push(RESULT_SUCCESS);
+
+        rb.Push(result);
     }
 
     void Initialize(Kernel::HLERequestContext& ctx) {
@@ -458,56 +569,7 @@ public:
     }
 
 private:
-    using SHA256Hash = std::array<u8, 0x20>;
-
-    struct NROHeader {
-        INSERT_PADDING_WORDS(1);
-        u32_le mod_offset;
-        INSERT_PADDING_WORDS(2);
-        u32_le magic;
-        u32_le version;
-        u32_le nro_size;
-        u32_le flags;
-        u32_le text_offset;
-        u32_le text_size;
-        u32_le ro_offset;
-        u32_le ro_size;
-        u32_le rw_offset;
-        u32_le rw_size;
-        u32_le bss_size;
-        INSERT_PADDING_WORDS(1);
-        std::array<u8, 0x20> build_id;
-        INSERT_PADDING_BYTES(0x20);
-    };
-    static_assert(sizeof(NROHeader) == 0x80, "NROHeader has invalid size.");
-
-    struct NRRHeader {
-        u32_le magic;
-        INSERT_PADDING_BYTES(12);
-        u64_le title_id_mask;
-        u64_le title_id_pattern;
-        INSERT_PADDING_BYTES(16);
-        std::array<u8, 0x100> modulus;
-        std::array<u8, 0x100> signature_1;
-        std::array<u8, 0x100> signature_2;
-        u64_le title_id;
-        u32_le size;
-        INSERT_PADDING_BYTES(4);
-        u32_le hash_offset;
-        u32_le hash_count;
-        INSERT_PADDING_BYTES(8);
-    };
-    static_assert(sizeof(NRRHeader) == 0x350, "NRRHeader has incorrect size.");
-
-    struct NROInfo {
-        SHA256Hash hash;
-        VAddr nro_address;
-        u64 nro_size;
-        VAddr bss_address;
-        u64 bss_size;
-    };
-
-    bool initialized = false;
+    bool initialized{};
 
     std::map<VAddr, NROInfo> nro;
     std::map<VAddr, std::vector<SHA256Hash>> nrr;

src/core/hle/service/lm/lm.cpp

@@ -17,7 +17,7 @@ namespace Service::LM {
 
 class ILogger final : public ServiceFramework<ILogger> {
 public:
-    explicit ILogger(Manager& manager_, Memory::Memory& memory_)
+    explicit ILogger(Manager& manager_, Core::Memory::Memory& memory_)
         : ServiceFramework("ILogger"), manager{manager_}, memory{memory_} {
         static const FunctionInfo functions[] = {
             {0, &ILogger::Log, "Log"},
@@ -75,12 +75,12 @@ private:
     }
 
     Manager& manager;
-    Memory::Memory& memory;
+    Core::Memory::Memory& memory;
 };
 
 class LM final : public ServiceFramework<LM> {
 public:
-    explicit LM(Manager& manager_, Memory::Memory& memory_)
+    explicit LM(Manager& manager_, Core::Memory::Memory& memory_)
         : ServiceFramework{"lm"}, manager{manager_}, memory{memory_} {
         // clang-format off
         static const FunctionInfo functions[] = {
@@ -101,7 +101,7 @@ private:
     }
 
     Manager& manager;
-    Memory::Memory& memory;
+    Core::Memory::Memory& memory;
 };
 
 void InstallInterfaces(Core::System& system) {

src/core/hle/service/ns/pl_u.cpp

@@ -19,6 +19,7 @@
 #include "core/file_sys/romfs.h"
 #include "core/file_sys/system_archive/system_archive.h"
 #include "core/hle/ipc_helpers.h"
+#include "core/hle/kernel/kernel.h"
 #include "core/hle/kernel/physical_memory.h"
 #include "core/hle/kernel/shared_memory.h"
 #include "core/hle/service/filesystem/filesystem.h"
@@ -265,16 +266,13 @@ void PL_U::GetSharedMemoryAddressOffset(Kernel::HLERequestContext& ctx) {
 void PL_U::GetSharedMemoryNativeHandle(Kernel::HLERequestContext& ctx) {
     // Map backing memory for the font data
     LOG_DEBUG(Service_NS, "called");
-    system.CurrentProcess()->VMManager().MapMemoryBlock(SHARED_FONT_MEM_VADDR, impl->shared_font, 0,
-                                                        SHARED_FONT_MEM_SIZE,
-                                                        Kernel::MemoryState::Shared);
 
     // Create shared font memory object
     auto& kernel = system.Kernel();
-    impl->shared_font_mem = Kernel::SharedMemory::Create(
-        kernel, system.CurrentProcess(), SHARED_FONT_MEM_SIZE, Kernel::MemoryPermission::ReadWrite,
-        Kernel::MemoryPermission::Read, SHARED_FONT_MEM_VADDR, Kernel::MemoryRegion::BASE,
-        "PL_U:shared_font_mem");
+    impl->shared_font_mem = SharedFrom(&kernel.GetFontSharedMem());
+
+    std::memcpy(impl->shared_font_mem->GetPointer(), impl->shared_font->data(),
+                impl->shared_font->size());
 
     IPC::ResponseBuilder rb{ctx, 2, 1};
     rb.Push(RESULT_SUCCESS);

src/core/hle/service/time/time_sharedmemory.cpp

@@ -6,6 +6,7 @@
 #include "core/core_timing.h"
 #include "core/core_timing_util.h"
 #include "core/hardware_properties.h"
+#include "core/hle/kernel/kernel.h"
 #include "core/hle/service/time/clock_types.h"
 #include "core/hle/service/time/steady_clock_core.h"
 #include "core/hle/service/time/time_sharedmemory.h"
@@ -15,9 +16,7 @@ namespace Service::Time {
 static constexpr std::size_t SHARED_MEMORY_SIZE{0x1000};
 
 SharedMemory::SharedMemory(Core::System& system) : system(system) {
-    shared_memory_holder = Kernel::SharedMemory::Create(
-        system.Kernel(), nullptr, SHARED_MEMORY_SIZE, Kernel::MemoryPermission::ReadWrite,
-        Kernel::MemoryPermission::Read, 0, Kernel::MemoryRegion::BASE, "Time:SharedMemory");
+    shared_memory_holder = SharedFrom(&system.Kernel().GetTimeSharedMem());
     std::memset(shared_memory_holder->GetPointer(), 0, SHARED_MEMORY_SIZE);
 }
 

src/core/loader/deconstructed_rom_directory.cpp

@@ -14,6 +14,7 @@
 #include "core/file_sys/romfs_factory.h"
 #include "core/gdbstub/gdbstub.h"
 #include "core/hle/kernel/kernel.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/service/filesystem/filesystem.h"
 #include "core/loader/deconstructed_rom_directory.h"
@@ -129,27 +130,47 @@ AppLoader_DeconstructedRomDirectory::LoadResult AppLoader_DeconstructedRomDirect
     }
     metadata.Print();
 
-    if (process.LoadFromMetadata(metadata).IsError()) {
-        return {ResultStatus::ErrorUnableToParseKernelMetadata, {}};
-    }
+    const auto static_modules = {"rtld",    "main",    "subsdk0", "subsdk1", "subsdk2", "subsdk3",
+                                 "subsdk4", "subsdk5", "subsdk6", "subsdk7", "sdk"};
 
-    const FileSys::PatchManager pm(metadata.GetTitleID());
-
-    // Load NSO modules
-    modules.clear();
-    const VAddr base_address = process.VMManager().GetCodeRegionBaseAddress();
-    VAddr next_load_addr = base_address;
-    for (const auto& module : {"rtld", "main", "subsdk0", "subsdk1", "subsdk2", "subsdk3",
-                               "subsdk4", "subsdk5", "subsdk6", "subsdk7", "sdk"}) {
-        const FileSys::VirtualFile module_file = dir->GetFile(module);
-        if (module_file == nullptr) {
+    // Use the NSO module loader to figure out the code layout
+    std::size_t code_size{};
+    for (const auto& module : static_modules) {
+        const FileSys::VirtualFile module_file{dir->GetFile(module)};
+        if (!module_file) {
             continue;
         }
 
-        const VAddr load_addr = next_load_addr;
-        const bool should_pass_arguments = std::strcmp(module, "rtld") == 0;
-        const auto tentative_next_load_addr =
-            AppLoader_NSO::LoadModule(process, *module_file, load_addr, should_pass_arguments, pm);
+        const bool should_pass_arguments{std::strcmp(module, "rtld") == 0};
+        const auto tentative_next_load_addr{AppLoader_NSO::LoadModule(
+            process, *module_file, code_size, should_pass_arguments, false)};
+        if (!tentative_next_load_addr) {
+            return {ResultStatus::ErrorLoadingNSO, {}};
+        }
+
+        code_size = *tentative_next_load_addr;
+    }
+
+    // Setup the process code layout
+    if (process.LoadFromMetadata(metadata, code_size).IsError()) {
+        return {ResultStatus::ErrorUnableToParseKernelMetadata, {}};
+    }
+
+    // Load NSO modules
+    modules.clear();
+    const VAddr base_address{process.PageTable().GetCodeRegionStart()};
+    VAddr next_load_addr{base_address};
+    const FileSys::PatchManager pm{metadata.GetTitleID()};
+    for (const auto& module : static_modules) {
+        const FileSys::VirtualFile module_file{dir->GetFile(module)};
+        if (!module_file) {
+            continue;
+        }
+
+        const VAddr load_addr{next_load_addr};
+        const bool should_pass_arguments{std::strcmp(module, "rtld") == 0};
+        const auto tentative_next_load_addr{AppLoader_NSO::LoadModule(
+            process, *module_file, load_addr, should_pass_arguments, true, pm)};
         if (!tentative_next_load_addr) {
             return {ResultStatus::ErrorLoadingNSO, {}};
         }

src/core/loader/elf.cpp

@@ -10,8 +10,8 @@
 #include "common/file_util.h"
 #include "common/logging/log.h"
 #include "core/hle/kernel/code_set.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/kernel/vm_manager.h"
 #include "core/loader/elf.h"
 #include "core/memory.h"
 
@@ -393,7 +393,7 @@ AppLoader_ELF::LoadResult AppLoader_ELF::Load(Kernel::Process& process) {
         return {ResultStatus::ErrorIncorrectELFFileSize, {}};
     }
 
-    const VAddr base_address = process.VMManager().GetCodeRegionBaseAddress();
+    const VAddr base_address = process.PageTable().GetCodeRegionStart();
     ElfReader elf_reader(&buffer[0]);
     Kernel::CodeSet codeset = elf_reader.LoadInto(base_address);
     const VAddr entry_point = codeset.entrypoint;
@@ -401,7 +401,7 @@ AppLoader_ELF::LoadResult AppLoader_ELF::Load(Kernel::Process& process) {
     process.LoadModule(std::move(codeset), entry_point);
 
     is_loaded = true;
-    return {ResultStatus::Success, LoadParameters{48, Memory::DEFAULT_STACK_SIZE}};
+    return {ResultStatus::Success, LoadParameters{48, Core::Memory::DEFAULT_STACK_SIZE}};
 }
 
 } // namespace Loader

src/core/loader/kip.cpp

@@ -7,14 +7,16 @@
 #include "core/file_sys/program_metadata.h"
 #include "core/gdbstub/gdbstub.h"
 #include "core/hle/kernel/code_set.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
 #include "core/loader/kip.h"
+#include "core/memory.h"
 
 namespace Loader {
 
 namespace {
 constexpr u32 PageAlignSize(u32 size) {
-    return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
+    return (size + Core::Memory::PAGE_MASK) & ~Core::Memory::PAGE_MASK;
 }
 } // Anonymous namespace
 
@@ -68,7 +70,7 @@ AppLoader::LoadResult AppLoader_KIP::Load(Kernel::Process& process) {
                         kip->GetMainThreadCpuCore(), kip->GetMainThreadStackSize(),
                         kip->GetTitleID(), 0xFFFFFFFFFFFFFFFF, kip->GetKernelCapabilities());
 
-    const VAddr base_address = process.VMManager().GetCodeRegionBaseAddress();
+    const VAddr base_address = process.PageTable().GetCodeRegionStart();
     Kernel::CodeSet codeset;
     Kernel::PhysicalMemory program_image;
 

src/core/loader/nro.cpp

@@ -16,8 +16,8 @@
 #include "core/file_sys/vfs_offset.h"
 #include "core/gdbstub/gdbstub.h"
 #include "core/hle/kernel/code_set.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/kernel/vm_manager.h"
 #include "core/hle/service/filesystem/filesystem.h"
 #include "core/loader/nro.h"
 #include "core/loader/nso.h"
@@ -127,7 +127,7 @@ FileType AppLoader_NRO::IdentifyType(const FileSys::VirtualFile& file) {
 }
 
 static constexpr u32 PageAlignSize(u32 size) {
-    return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
+    return (size + Core::Memory::PAGE_MASK) & ~Core::Memory::PAGE_MASK;
 }
 
 static bool LoadNroImpl(Kernel::Process& process, const std::vector<u8>& data,
@@ -208,7 +208,7 @@ AppLoader_NRO::LoadResult AppLoader_NRO::Load(Kernel::Process& process) {
     }
 
     // Load NRO
-    const VAddr base_address = process.VMManager().GetCodeRegionBaseAddress();
+    const VAddr base_address = process.PageTable().GetCodeRegionStart();
 
     if (!LoadNro(process, *file, base_address)) {
         return {ResultStatus::ErrorLoadingNRO, {}};
@@ -221,7 +221,7 @@ AppLoader_NRO::LoadResult AppLoader_NRO::Load(Kernel::Process& process) {
 
     is_loaded = true;
     return {ResultStatus::Success,
-            LoadParameters{Kernel::THREADPRIO_DEFAULT, Memory::DEFAULT_STACK_SIZE}};
+            LoadParameters{Kernel::THREADPRIO_DEFAULT, Core::Memory::DEFAULT_STACK_SIZE}};
 }
 
 ResultStatus AppLoader_NRO::ReadIcon(std::vector<u8>& buffer) {

src/core/loader/nso.cpp

@@ -16,8 +16,8 @@
 #include "core/file_sys/patch_manager.h"
 #include "core/gdbstub/gdbstub.h"
 #include "core/hle/kernel/code_set.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/kernel/vm_manager.h"
 #include "core/loader/nso.h"
 #include "core/memory.h"
 #include "core/settings.h"
@@ -47,7 +47,7 @@ std::vector<u8> DecompressSegment(const std::vector<u8>& compressed_data,
 }
 
 constexpr u32 PageAlignSize(u32 size) {
-    return (size + Memory::PAGE_MASK) & ~Memory::PAGE_MASK;
+    return (size + Core::Memory::PAGE_MASK) & ~Core::Memory::PAGE_MASK;
 }
 } // Anonymous namespace
 
@@ -73,7 +73,7 @@ FileType AppLoader_NSO::IdentifyType(const FileSys::VirtualFile& file) {
 
 std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process,
                                                const FileSys::VfsFile& file, VAddr load_base,
-                                               bool should_pass_arguments,
+                                               bool should_pass_arguments, bool load_into_process,
                                                std::optional<FileSys::PatchManager> pm) {
     if (file.GetSize() < sizeof(NSOHeader)) {
         return {};
@@ -97,21 +97,17 @@ std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process,
         if (nso_header.IsSegmentCompressed(i)) {
             data = DecompressSegment(data, nso_header.segments[i]);
         }
-        program_image.resize(nso_header.segments[i].location +
-                             PageAlignSize(static_cast<u32>(data.size())));
+        program_image.resize(nso_header.segments[i].location + static_cast<u32>(data.size()));
         std::memcpy(program_image.data() + nso_header.segments[i].location, data.data(),
                     data.size());
         codeset.segments[i].addr = nso_header.segments[i].location;
         codeset.segments[i].offset = nso_header.segments[i].location;
-        codeset.segments[i].size = PageAlignSize(static_cast<u32>(data.size()));
+        codeset.segments[i].size = nso_header.segments[i].size;
     }
 
-    if (should_pass_arguments) {
-        std::vector<u8> arg_data{Settings::values.program_args.begin(),
-                                 Settings::values.program_args.end()};
-        if (arg_data.empty()) {
-            arg_data.resize(NSO_ARGUMENT_DEFAULT_SIZE);
-        }
+    if (should_pass_arguments && !Settings::values.program_args.empty()) {
+        const auto arg_data{Settings::values.program_args};
+
         codeset.DataSegment().size += NSO_ARGUMENT_DATA_ALLOCATION_SIZE;
         NSOArgumentHeader args_header{
             NSO_ARGUMENT_DATA_ALLOCATION_SIZE, static_cast<u32_le>(arg_data.size()), {}};
@@ -123,24 +119,15 @@ std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process,
                     arg_data.size());
     }
 
-    // MOD header pointer is at .text offset + 4
-    u32 module_offset;
-    std::memcpy(&module_offset, program_image.data() + 4, sizeof(u32));
-
-    // Read MOD header
-    MODHeader mod_header{};
-    // Default .bss to size in segment header if MOD0 section doesn't exist
-    u32 bss_size{PageAlignSize(nso_header.segments[2].bss_size)};
-    std::memcpy(&mod_header, program_image.data() + module_offset, sizeof(MODHeader));
-    const bool has_mod_header{mod_header.magic == Common::MakeMagic('M', 'O', 'D', '0')};
-    if (has_mod_header) {
-        // Resize program image to include .bss section and page align each section
-        bss_size = PageAlignSize(mod_header.bss_end_offset - mod_header.bss_start_offset);
-    }
-    codeset.DataSegment().size += bss_size;
-    const u32 image_size{PageAlignSize(static_cast<u32>(program_image.size()) + bss_size)};
+    codeset.DataSegment().size += nso_header.segments[2].bss_size;
+    const u32 image_size{
+        PageAlignSize(static_cast<u32>(program_image.size()) + nso_header.segments[2].bss_size)};
     program_image.resize(image_size);
 
+    for (std::size_t i = 0; i < nso_header.segments.size(); ++i) {
+        codeset.segments[i].size = PageAlignSize(codeset.segments[i].size);
+    }
+
     // Apply patches if necessary
     if (pm && (pm->HasNSOPatch(nso_header.build_id) || Settings::values.dump_nso)) {
         std::vector<u8> pi_header;
@@ -154,6 +141,11 @@ std::optional<VAddr> AppLoader_NSO::LoadModule(Kernel::Process& process,
         std::copy(pi_header.begin() + sizeof(NSOHeader), pi_header.end(), program_image.data());
     }
 
+    // If we aren't actually loading (i.e. just computing the process code layout), we are done
+    if (!load_into_process) {
+        return load_base + image_size;
+    }
+
     // Apply cheats if they exist and the program has a valid title ID
     if (pm) {
         auto& system = Core::System::GetInstance();
@@ -182,8 +174,8 @@ AppLoader_NSO::LoadResult AppLoader_NSO::Load(Kernel::Process& process) {
     modules.clear();
 
     // Load module
-    const VAddr base_address = process.VMManager().GetCodeRegionBaseAddress();
-    if (!LoadModule(process, *file, base_address, true)) {
+    const VAddr base_address = process.PageTable().GetCodeRegionStart();
+    if (!LoadModule(process, *file, base_address, true, true)) {
         return {ResultStatus::ErrorLoadingNSO, {}};
     }
 
@@ -192,7 +184,7 @@ AppLoader_NSO::LoadResult AppLoader_NSO::Load(Kernel::Process& process) {
 
     is_loaded = true;
     return {ResultStatus::Success,
-            LoadParameters{Kernel::THREADPRIO_DEFAULT, Memory::DEFAULT_STACK_SIZE}};
+            LoadParameters{Kernel::THREADPRIO_DEFAULT, Core::Memory::DEFAULT_STACK_SIZE}};
 }
 
 ResultStatus AppLoader_NSO::ReadNSOModules(Modules& modules) {

src/core/loader/nso.h

@@ -56,8 +56,6 @@ static_assert(sizeof(NSOHeader) == 0x100, "NSOHeader has incorrect size.");
 static_assert(std::is_trivially_copyable_v<NSOHeader>, "NSOHeader must be trivially copyable.");
 
 constexpr u64 NSO_ARGUMENT_DATA_ALLOCATION_SIZE = 0x9000;
-// NOTE: Official software default argument state is unverified.
-constexpr u64 NSO_ARGUMENT_DEFAULT_SIZE = 1;
 
 struct NSOArgumentHeader {
     u32_le allocated_size;
@@ -84,6 +82,7 @@ public:
 
     static std::optional<VAddr> LoadModule(Kernel::Process& process, const FileSys::VfsFile& file,
                                            VAddr load_base, bool should_pass_arguments,
+                                           bool load_into_process,
                                            std::optional<FileSys::PatchManager> pm = {});
 
     LoadResult Load(Kernel::Process& process) override;

src/core/memory.cpp

@@ -14,13 +14,14 @@
 #include "common/swap.h"
 #include "core/arm/arm_interface.h"
 #include "core/core.h"
+#include "core/device_memory.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/physical_memory.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/kernel/vm_manager.h"
 #include "core/memory.h"
 #include "video_core/gpu.h"
 
-namespace Memory {
+namespace Core::Memory {
 
 // Implementation class used to keep the specifics of the memory subsystem hidden
 // from outside classes. This also allows modification to the internals of the memory
@@ -29,9 +30,9 @@ struct Memory::Impl {
     explicit Impl(Core::System& system_) : system{system_} {}
 
     void SetCurrentPageTable(Kernel::Process& process) {
-        current_page_table = &process.VMManager().page_table;
+        current_page_table = &process.PageTable().PageTableImpl();
 
-        const std::size_t address_space_width = process.VMManager().GetAddressSpaceWidth();
+        const std::size_t address_space_width = process.PageTable().GetAddressSpaceWidth();
 
         system.ArmInterface(0).PageTableChanged(*current_page_table, address_space_width);
         system.ArmInterface(1).PageTableChanged(*current_page_table, address_space_width);
@@ -39,12 +40,7 @@ struct Memory::Impl {
         system.ArmInterface(3).PageTableChanged(*current_page_table, address_space_width);
     }
 
-    void MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size,
-                         Kernel::PhysicalMemory& memory, VAddr offset) {
-        MapMemoryRegion(page_table, base, size, memory.data() + offset);
-    }
-
-    void MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size, u8* target) {
+    void MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size, PAddr target) {
         ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: {:016X}", size);
         ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: {:016X}", base);
         MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, target, Common::PageType::Memory);
@@ -52,46 +48,27 @@ struct Memory::Impl {
 
     void MapIoRegion(Common::PageTable& page_table, VAddr base, u64 size,
                      Common::MemoryHookPointer mmio_handler) {
-        ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: {:016X}", size);
-        ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: {:016X}", base);
-        MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, nullptr,
-                 Common::PageType::Special);
-
-        const auto interval = boost::icl::discrete_interval<VAddr>::closed(base, base + size - 1);
-        const Common::SpecialRegion region{Common::SpecialRegion::Type::IODevice,
-                                           std::move(mmio_handler)};
-        page_table.special_regions.add(
-            std::make_pair(interval, std::set<Common::SpecialRegion>{region}));
+        UNIMPLEMENTED();
     }
 
     void UnmapRegion(Common::PageTable& page_table, VAddr base, u64 size) {
         ASSERT_MSG((size & PAGE_MASK) == 0, "non-page aligned size: {:016X}", size);
         ASSERT_MSG((base & PAGE_MASK) == 0, "non-page aligned base: {:016X}", base);
-        MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, nullptr,
-                 Common::PageType::Unmapped);
-
-        const auto interval = boost::icl::discrete_interval<VAddr>::closed(base, base + size - 1);
-        page_table.special_regions.erase(interval);
+        MapPages(page_table, base / PAGE_SIZE, size / PAGE_SIZE, 0, Common::PageType::Unmapped);
     }
 
     void AddDebugHook(Common::PageTable& page_table, VAddr base, u64 size,
                       Common::MemoryHookPointer hook) {
-        const auto interval = boost::icl::discrete_interval<VAddr>::closed(base, base + size - 1);
-        const Common::SpecialRegion region{Common::SpecialRegion::Type::DebugHook, std::move(hook)};
-        page_table.special_regions.add(
-            std::make_pair(interval, std::set<Common::SpecialRegion>{region}));
+        UNIMPLEMENTED();
     }
 
     void RemoveDebugHook(Common::PageTable& page_table, VAddr base, u64 size,
                          Common::MemoryHookPointer hook) {
-        const auto interval = boost::icl::discrete_interval<VAddr>::closed(base, base + size - 1);
-        const Common::SpecialRegion region{Common::SpecialRegion::Type::DebugHook, std::move(hook)};
-        page_table.special_regions.subtract(
-            std::make_pair(interval, std::set<Common::SpecialRegion>{region}));
+        UNIMPLEMENTED();
     }
 
     bool IsValidVirtualAddress(const Kernel::Process& process, const VAddr vaddr) const {
-        const auto& page_table = process.VMManager().page_table;
+        const auto& page_table = process.PageTable().PageTableImpl();
 
         const u8* const page_pointer = page_table.pointers[vaddr >> PAGE_BITS];
         if (page_pointer != nullptr) {
@@ -113,55 +90,28 @@ struct Memory::Impl {
         return IsValidVirtualAddress(*system.CurrentProcess(), vaddr);
     }
 
-    /**
-     * Gets a pointer to the exact memory at the virtual address (i.e. not page aligned)
-     * using a VMA from the current process
-     */
-    u8* GetPointerFromVMA(const Kernel::Process& process, VAddr vaddr) {
-        const auto& vm_manager = process.VMManager();
+    u8* GetPointerFromRasterizerCachedMemory(VAddr vaddr) const {
+        const PAddr paddr{current_page_table->backing_addr[vaddr >> PAGE_BITS]};
 
-        const auto it = vm_manager.FindVMA(vaddr);
-        DEBUG_ASSERT(vm_manager.IsValidHandle(it));
-
-        u8* direct_pointer = nullptr;
-        const auto& vma = it->second;
-        switch (vma.type) {
-        case Kernel::VMAType::AllocatedMemoryBlock:
-            direct_pointer = vma.backing_block->data() + vma.offset;
-            break;
-        case Kernel::VMAType::BackingMemory:
-            direct_pointer = vma.backing_memory;
-            break;
-        case Kernel::VMAType::Free:
-            return nullptr;
-        default:
-            UNREACHABLE();
+        if (!paddr) {
+            return {};
         }
 
-        return direct_pointer + (vaddr - vma.base);
+        return system.DeviceMemory().GetPointer(paddr) + vaddr;
     }
 
-    /**
-     * Gets a pointer to the exact memory at the virtual address (i.e. not page aligned)
-     * using a VMA from the current process.
-     */
-    u8* GetPointerFromVMA(VAddr vaddr) {
-        return GetPointerFromVMA(*system.CurrentProcess(), vaddr);
-    }
-
-    u8* GetPointer(const VAddr vaddr) {
-        u8* const page_pointer = current_page_table->pointers[vaddr >> PAGE_BITS];
-        if (page_pointer != nullptr) {
+    u8* GetPointer(const VAddr vaddr) const {
+        u8* const page_pointer{current_page_table->pointers[vaddr >> PAGE_BITS]};
+        if (page_pointer) {
             return page_pointer + vaddr;
         }
 
         if (current_page_table->attributes[vaddr >> PAGE_BITS] ==
             Common::PageType::RasterizerCachedMemory) {
-            return GetPointerFromVMA(vaddr);
+            return GetPointerFromRasterizerCachedMemory(vaddr);
         }
 
-        LOG_ERROR(HW_Memory, "Unknown GetPointer @ 0x{:016X}", vaddr);
-        return nullptr;
+        return {};
     }
 
     u8 Read8(const VAddr addr) {
@@ -169,15 +119,33 @@ struct Memory::Impl {
     }
 
     u16 Read16(const VAddr addr) {
+        if ((addr & 1) == 0) {
             return Read<u16_le>(addr);
+        } else {
+            const u8 a{Read<u8>(addr)};
+            const u8 b{Read<u8>(addr + sizeof(u8))};
+            return (static_cast<u16>(b) << 8) | a;
+        }
     }
 
     u32 Read32(const VAddr addr) {
+        if ((addr & 3) == 0) {
             return Read<u32_le>(addr);
+        } else {
+            const u16 a{Read16(addr)};
+            const u16 b{Read16(addr + sizeof(u16))};
+            return (static_cast<u32>(b) << 16) | a;
+        }
     }
 
     u64 Read64(const VAddr addr) {
+        if ((addr & 7) == 0) {
             return Read<u64_le>(addr);
+        } else {
+            const u32 a{Read32(addr)};
+            const u32 b{Read32(addr + sizeof(u32))};
+            return (static_cast<u64>(b) << 32) | a;
+        }
     }
 
     void Write8(const VAddr addr, const u8 data) {
@@ -185,15 +153,30 @@ struct Memory::Impl {
     }
 
     void Write16(const VAddr addr, const u16 data) {
+        if ((addr & 1) == 0) {
             Write<u16_le>(addr, data);
+        } else {
+            Write<u8>(addr, static_cast<u8>(data));
+            Write<u8>(addr + sizeof(u8), static_cast<u8>(data >> 8));
+        }
     }
 
     void Write32(const VAddr addr, const u32 data) {
+        if ((addr & 3) == 0) {
             Write<u32_le>(addr, data);
+        } else {
+            Write16(addr, static_cast<u16>(data));
+            Write16(addr + sizeof(u16), static_cast<u16>(data >> 16));
+        }
     }
 
     void Write64(const VAddr addr, const u64 data) {
+        if ((addr & 7) == 0) {
             Write<u64_le>(addr, data);
+        } else {
+            Write32(addr, static_cast<u32>(data));
+            Write32(addr + sizeof(u32), static_cast<u32>(data >> 32));
+        }
     }
 
     std::string ReadCString(VAddr vaddr, std::size_t max_length) {
@@ -213,7 +196,7 @@ struct Memory::Impl {
 
     void ReadBlock(const Kernel::Process& process, const VAddr src_addr, void* dest_buffer,
                    const std::size_t size) {
-        const auto& page_table = process.VMManager().page_table;
+        const auto& page_table = process.PageTable().PageTableImpl();
 
         std::size_t remaining_size = size;
         std::size_t page_index = src_addr >> PAGE_BITS;
@@ -241,7 +224,7 @@ struct Memory::Impl {
                 break;
             }
             case Common::PageType::RasterizerCachedMemory: {
-                const u8* const host_ptr = GetPointerFromVMA(process, current_vaddr);
+                const u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
                 system.GPU().FlushRegion(current_vaddr, copy_amount);
                 std::memcpy(dest_buffer, host_ptr, copy_amount);
                 break;
@@ -259,7 +242,7 @@ struct Memory::Impl {
 
     void ReadBlockUnsafe(const Kernel::Process& process, const VAddr src_addr, void* dest_buffer,
                          const std::size_t size) {
-        const auto& page_table = process.VMManager().page_table;
+        const auto& page_table = process.PageTable().PageTableImpl();
 
         std::size_t remaining_size = size;
         std::size_t page_index = src_addr >> PAGE_BITS;
@@ -287,7 +270,7 @@ struct Memory::Impl {
                 break;
             }
             case Common::PageType::RasterizerCachedMemory: {
-                const u8* const host_ptr = GetPointerFromVMA(process, current_vaddr);
+                const u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
                 std::memcpy(dest_buffer, host_ptr, copy_amount);
                 break;
             }
@@ -312,7 +295,7 @@ struct Memory::Impl {
 
     void WriteBlock(const Kernel::Process& process, const VAddr dest_addr, const void* src_buffer,
                     const std::size_t size) {
-        const auto& page_table = process.VMManager().page_table;
+        const auto& page_table = process.PageTable().PageTableImpl();
         std::size_t remaining_size = size;
         std::size_t page_index = dest_addr >> PAGE_BITS;
         std::size_t page_offset = dest_addr & PAGE_MASK;
@@ -338,7 +321,7 @@ struct Memory::Impl {
                 break;
             }
             case Common::PageType::RasterizerCachedMemory: {
-                u8* const host_ptr = GetPointerFromVMA(process, current_vaddr);
+                u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
                 system.GPU().InvalidateRegion(current_vaddr, copy_amount);
                 std::memcpy(host_ptr, src_buffer, copy_amount);
                 break;
@@ -356,7 +339,7 @@ struct Memory::Impl {
 
     void WriteBlockUnsafe(const Kernel::Process& process, const VAddr dest_addr,
                           const void* src_buffer, const std::size_t size) {
-        const auto& page_table = process.VMManager().page_table;
+        const auto& page_table = process.PageTable().PageTableImpl();
         std::size_t remaining_size = size;
         std::size_t page_index = dest_addr >> PAGE_BITS;
         std::size_t page_offset = dest_addr & PAGE_MASK;
@@ -382,7 +365,7 @@ struct Memory::Impl {
                 break;
             }
             case Common::PageType::RasterizerCachedMemory: {
-                u8* const host_ptr = GetPointerFromVMA(process, current_vaddr);
+                u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
                 std::memcpy(host_ptr, src_buffer, copy_amount);
                 break;
             }
@@ -406,7 +389,7 @@ struct Memory::Impl {
     }
 
     void ZeroBlock(const Kernel::Process& process, const VAddr dest_addr, const std::size_t size) {
-        const auto& page_table = process.VMManager().page_table;
+        const auto& page_table = process.PageTable().PageTableImpl();
         std::size_t remaining_size = size;
         std::size_t page_index = dest_addr >> PAGE_BITS;
         std::size_t page_offset = dest_addr & PAGE_MASK;
@@ -432,7 +415,7 @@ struct Memory::Impl {
                 break;
             }
             case Common::PageType::RasterizerCachedMemory: {
-                u8* const host_ptr = GetPointerFromVMA(process, current_vaddr);
+                u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
                 system.GPU().InvalidateRegion(current_vaddr, copy_amount);
                 std::memset(host_ptr, 0, copy_amount);
                 break;
@@ -453,7 +436,7 @@ struct Memory::Impl {
 
     void CopyBlock(const Kernel::Process& process, VAddr dest_addr, VAddr src_addr,
                    const std::size_t size) {
-        const auto& page_table = process.VMManager().page_table;
+        const auto& page_table = process.PageTable().PageTableImpl();
         std::size_t remaining_size = size;
         std::size_t page_index = src_addr >> PAGE_BITS;
         std::size_t page_offset = src_addr & PAGE_MASK;
@@ -479,7 +462,7 @@ struct Memory::Impl {
                 break;
             }
             case Common::PageType::RasterizerCachedMemory: {
-                const u8* const host_ptr = GetPointerFromVMA(process, current_vaddr);
+                const u8* const host_ptr{GetPointerFromRasterizerCachedMemory(current_vaddr)};
                 system.GPU().FlushRegion(current_vaddr, copy_amount);
                 WriteBlock(process, dest_addr, host_ptr, copy_amount);
                 break;
@@ -512,7 +495,7 @@ struct Memory::Impl {
 
         u64 num_pages = ((vaddr + size - 1) >> PAGE_BITS) - (vaddr >> PAGE_BITS) + 1;
         for (unsigned i = 0; i < num_pages; ++i, vaddr += PAGE_SIZE) {
-            Common::PageType& page_type = current_page_table->attributes[vaddr >> PAGE_BITS];
+            Common::PageType& page_type{current_page_table->attributes[vaddr >> PAGE_BITS]};
 
             if (cached) {
                 // Switch page type to cached if now cached
@@ -544,7 +527,7 @@ struct Memory::Impl {
                     // that this area is already unmarked as cached.
                     break;
                 case Common::PageType::RasterizerCachedMemory: {
-                    u8* pointer = GetPointerFromVMA(vaddr & ~PAGE_MASK);
+                    u8* pointer{GetPointerFromRasterizerCachedMemory(vaddr & ~PAGE_MASK)};
                     if (pointer == nullptr) {
                         // It's possible that this function has been called while updating the
                         // pagetable after unmapping a VMA. In that case the underlying VMA will no
@@ -573,9 +556,9 @@ struct Memory::Impl {
      * @param memory     The memory to map.
      * @param type       The page type to map the memory as.
      */
-    void MapPages(Common::PageTable& page_table, VAddr base, u64 size, u8* memory,
+    void MapPages(Common::PageTable& page_table, VAddr base, u64 size, PAddr target,
                   Common::PageType type) {
-        LOG_DEBUG(HW_Memory, "Mapping {} onto {:016X}-{:016X}", fmt::ptr(memory), base * PAGE_SIZE,
+        LOG_DEBUG(HW_Memory, "Mapping {:016X} onto {:016X}-{:016X}", target, base * PAGE_SIZE,
                   (base + size) * PAGE_SIZE);
 
         // During boot, current_page_table might not be set yet, in which case we need not flush
@@ -593,19 +576,26 @@ struct Memory::Impl {
         ASSERT_MSG(end <= page_table.pointers.size(), "out of range mapping at {:016X}",
                    base + page_table.pointers.size());
 
-        std::fill(page_table.attributes.begin() + base, page_table.attributes.begin() + end, type);
+        if (!target) {
+            while (base != end) {
+                page_table.pointers[base] = nullptr;
+                page_table.attributes[base] = type;
+                page_table.backing_addr[base] = 0;
 
-        if (memory == nullptr) {
-            std::fill(page_table.pointers.begin() + base, page_table.pointers.begin() + end,
-                      memory);
+                base += 1;
+            }
         } else {
             while (base != end) {
-                page_table.pointers[base] = memory - (base << PAGE_BITS);
+                page_table.pointers[base] =
+                    system.DeviceMemory().GetPointer(target) - (base << PAGE_BITS);
+                page_table.attributes[base] = type;
+                page_table.backing_addr[base] = target - (base << PAGE_BITS);
+
                 ASSERT_MSG(page_table.pointers[base],
                            "memory mapping base yield a nullptr within the table");
 
                 base += 1;
-                memory += PAGE_SIZE;
+                target += PAGE_SIZE;
             }
         }
     }
@@ -640,7 +630,7 @@ struct Memory::Impl {
             ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
             break;
         case Common::PageType::RasterizerCachedMemory: {
-            const u8* const host_ptr = GetPointerFromVMA(vaddr);
+            const u8* const host_ptr{GetPointerFromRasterizerCachedMemory(vaddr)};
             system.GPU().FlushRegion(vaddr, sizeof(T));
             T value;
             std::memcpy(&value, host_ptr, sizeof(T));
@@ -682,7 +672,7 @@ struct Memory::Impl {
             ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr);
             break;
         case Common::PageType::RasterizerCachedMemory: {
-            u8* const host_ptr{GetPointerFromVMA(vaddr)};
+            u8* const host_ptr{GetPointerFromRasterizerCachedMemory(vaddr)};
             system.GPU().InvalidateRegion(vaddr, sizeof(T));
             std::memcpy(host_ptr, &data, sizeof(T));
             break;
@@ -703,12 +693,7 @@ void Memory::SetCurrentPageTable(Kernel::Process& process) {
     impl->SetCurrentPageTable(process);
 }
 
-void Memory::MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size,
-                             Kernel::PhysicalMemory& memory, VAddr offset) {
-    impl->MapMemoryRegion(page_table, base, size, memory, offset);
-}
-
-void Memory::MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size, u8* target) {
+void Memory::MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size, PAddr target) {
     impl->MapMemoryRegion(page_table, base, size, target);
 }
 
@@ -845,4 +830,4 @@ bool IsKernelVirtualAddress(const VAddr vaddr) {
     return KERNEL_REGION_VADDR <= vaddr && vaddr < KERNEL_REGION_END;
 }
 
-} // namespace Memory
+} // namespace Core::Memory

src/core/memory.h

@@ -23,7 +23,7 @@ class PhysicalMemory;
 class Process;
 } // namespace Kernel
 
-namespace Memory {
+namespace Core::Memory {
 
 /**
  * Page size used by the ARM architecture. This is the smallest granularity with which memory can
@@ -66,19 +66,6 @@ public:
      */
     void SetCurrentPageTable(Kernel::Process& process);
 
-    /**
-     * Maps an physical buffer onto a region of the emulated process address space.
-     *
-     * @param page_table The page table of the emulated process.
-     * @param base       The address to start mapping at. Must be page-aligned.
-     * @param size       The amount of bytes to map. Must be page-aligned.
-     * @param memory     Physical buffer with the memory backing the mapping. Must be of length
-     *                   at least `size + offset`.
-     * @param offset     The offset within the physical memory. Must be page-aligned.
-     */
-    void MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size,
-                         Kernel::PhysicalMemory& memory, VAddr offset);
-
     /**
      * Maps an allocated buffer onto a region of the emulated process address space.
      *
@@ -88,7 +75,7 @@ public:
      * @param target     Buffer with the memory backing the mapping. Must be of length at least
      *                   `size`.
      */
-    void MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size, u8* target);
+    void MapMemoryRegion(Common::PageTable& page_table, VAddr base, u64 size, PAddr target);
 
     /**
      * Maps a region of the emulated process address space as a IO region.
@@ -503,4 +490,4 @@ private:
 /// Determines if the given VAddr is a kernel address
 bool IsKernelVirtualAddress(VAddr vaddr);
 
-} // namespace Memory
+} // namespace Core::Memory

src/core/memory/cheat_engine.cpp

@@ -10,13 +10,15 @@
 #include "core/core_timing.h"
 #include "core/core_timing_util.h"
 #include "core/hardware_properties.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/service/hid/controllers/npad.h"
 #include "core/hle/service/hid/hid.h"
 #include "core/hle/service/sm/sm.h"
+#include "core/memory.h"
 #include "core/memory/cheat_engine.h"
 
-namespace Memory {
+namespace Core::Memory {
 
 constexpr s64 CHEAT_ENGINE_TICKS = static_cast<s64>(Core::Hardware::BASE_CLOCK_RATE / 12);
 constexpr u32 KEYPAD_BITMASK = 0x3FFFFFF;
@@ -194,11 +196,12 @@ void CheatEngine::Initialize() {
     metadata.process_id = system.CurrentProcess()->GetProcessID();
     metadata.title_id = system.CurrentProcess()->GetTitleID();
 
-    const auto& vm_manager = system.CurrentProcess()->VMManager();
-    metadata.heap_extents = {vm_manager.GetHeapRegionBaseAddress(), vm_manager.GetHeapRegionSize()};
-    metadata.address_space_extents = {vm_manager.GetAddressSpaceBaseAddress(),
-                                      vm_manager.GetAddressSpaceSize()};
-    metadata.alias_extents = {vm_manager.GetMapRegionBaseAddress(), vm_manager.GetMapRegionSize()};
+    const auto& page_table = system.CurrentProcess()->PageTable();
+    metadata.heap_extents = {page_table.GetHeapRegionStart(), page_table.GetHeapRegionSize()};
+    metadata.address_space_extents = {page_table.GetAddressSpaceStart(),
+                                      page_table.GetAddressSpaceSize()};
+    metadata.alias_extents = {page_table.GetAliasCodeRegionStart(),
+                              page_table.GetAliasCodeRegionSize()};
 
     is_pending_reload.exchange(true);
 }
@@ -230,4 +233,4 @@ void CheatEngine::FrameCallback(u64 userdata, s64 cycles_late) {
     core_timing.ScheduleEvent(CHEAT_ENGINE_TICKS - cycles_late, event);
 }
 
-} // namespace Memory
+} // namespace Core::Memory

src/core/memory/cheat_engine.h

@@ -20,7 +20,7 @@ class CoreTiming;
 struct EventType;
 } // namespace Core::Timing
 
-namespace Memory {
+namespace Core::Memory {
 
 class StandardVmCallbacks : public DmntCheatVm::Callbacks {
 public:
@@ -84,4 +84,4 @@ private:
     Core::System& system;
 };
 
-} // namespace Memory
+} // namespace Core::Memory

src/core/memory/dmnt_cheat_types.h

@@ -26,7 +26,7 @@
 
 #include "common/common_types.h"
 
-namespace Memory {
+namespace Core::Memory {
 
 struct MemoryRegionExtents {
     u64 base{};
@@ -55,4 +55,4 @@ struct CheatEntry {
     CheatDefinition definition{};
 };
 
-} // namespace Memory
+} // namespace Core::Memory

src/core/memory/dmnt_cheat_vm.cpp

@@ -27,7 +27,7 @@
 #include "core/memory/dmnt_cheat_types.h"
 #include "core/memory/dmnt_cheat_vm.h"
 
-namespace Memory {
+namespace Core::Memory {
 
 DmntCheatVm::DmntCheatVm(std::unique_ptr<Callbacks> callbacks) : callbacks(std::move(callbacks)) {}
 
@@ -1210,4 +1210,4 @@ void DmntCheatVm::Execute(const CheatProcessMetadata& metadata) {
     }
 }
 
-} // namespace Memory
+} // namespace Core::Memory

src/core/memory/dmnt_cheat_vm.h

@@ -30,7 +30,7 @@
 #include "common/common_types.h"
 #include "core/memory/dmnt_cheat_types.h"
 
-namespace Memory {
+namespace Core::Memory {
 
 enum class CheatVmOpcodeType : u32 {
     StoreStatic = 0,
@@ -318,4 +318,4 @@ private:
                                       MemoryAccessType mem_type, u64 rel_address);
 };
 
-}; // namespace Memory
+}; // namespace Core::Memory

src/core/reporter.cpp

@@ -16,9 +16,11 @@
 #include "core/arm/arm_interface.h"
 #include "core/core.h"
 #include "core/hle/kernel/hle_ipc.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
 #include "core/hle/result.h"
 #include "core/hle/service/lm/manager.h"
+#include "core/memory.h"
 #include "core/reporter.h"
 #include "core/settings.h"
 
@@ -108,14 +110,13 @@ json GetProcessorStateData(const std::string& architecture, u64 entry_point, u64
 
 json GetProcessorStateDataAuto(Core::System& system) {
     const auto* process{system.CurrentProcess()};
-    const auto& vm_manager{process->VMManager()};
     auto& arm{system.CurrentArmInterface()};
 
     Core::ARM_Interface::ThreadContext64 context{};
     arm.SaveContext(context);
 
     return GetProcessorStateData(process->Is64BitProcess() ? "AArch64" : "AArch32",
-                                 vm_manager.GetCodeRegionBaseAddress(), context.sp, context.pc,
+                                 process->PageTable().GetCodeRegionStart(), context.sp, context.pc,
                                  context.pstate, context.cpu_registers);
 }
 
@@ -147,7 +148,8 @@ json GetFullDataAuto(const std::string& timestamp, u64 title_id, Core::System& s
 }
 
 template <bool read_value, typename DescriptorType>
-json GetHLEBufferDescriptorData(const std::vector<DescriptorType>& buffer, Memory::Memory& memory) {
+json GetHLEBufferDescriptorData(const std::vector<DescriptorType>& buffer,
+                                Core::Memory::Memory& memory) {
     auto buffer_out = json::array();
     for (const auto& desc : buffer) {
         auto entry = json{
@@ -167,7 +169,7 @@ json GetHLEBufferDescriptorData(const std::vector<DescriptorType>& buffer, Memor
     return buffer_out;
 }
 
-json GetHLERequestContextData(Kernel::HLERequestContext& ctx, Memory::Memory& memory) {
+json GetHLERequestContextData(Kernel::HLERequestContext& ctx, Core::Memory::Memory& memory) {
     json out;
 
     auto cmd_buf = json::array();

src/core/tools/freezer.cpp

@@ -16,7 +16,7 @@ namespace {
 
 constexpr s64 MEMORY_FREEZER_TICKS = static_cast<s64>(Core::Hardware::BASE_CLOCK_RATE / 60);
 
-u64 MemoryReadWidth(Memory::Memory& memory, u32 width, VAddr addr) {
+u64 MemoryReadWidth(Core::Memory::Memory& memory, u32 width, VAddr addr) {
     switch (width) {
     case 1:
         return memory.Read8(addr);
@@ -32,7 +32,7 @@ u64 MemoryReadWidth(Memory::Memory& memory, u32 width, VAddr addr) {
     }
 }
 
-void MemoryWriteWidth(Memory::Memory& memory, u32 width, VAddr addr, u64 value) {
+void MemoryWriteWidth(Core::Memory::Memory& memory, u32 width, VAddr addr, u64 value) {
     switch (width) {
     case 1:
         memory.Write8(addr, static_cast<u8>(value));
@@ -53,7 +53,7 @@ void MemoryWriteWidth(Memory::Memory& memory, u32 width, VAddr addr, u64 value)
 
 } // Anonymous namespace
 
-Freezer::Freezer(Core::Timing::CoreTiming& core_timing_, Memory::Memory& memory_)
+Freezer::Freezer(Core::Timing::CoreTiming& core_timing_, Core::Memory::Memory& memory_)
     : core_timing{core_timing_}, memory{memory_} {
     event = Core::Timing::CreateEvent(
         "MemoryFreezer::FrameCallback",

src/core/tools/freezer.h

@@ -16,7 +16,7 @@ class CoreTiming;
 struct EventType;
 } // namespace Core::Timing
 
-namespace Memory {
+namespace Core::Memory {
 class Memory;
 }
 
@@ -38,7 +38,7 @@ public:
         u64 value;
     };
 
-    explicit Freezer(Core::Timing::CoreTiming& core_timing_, Memory::Memory& memory_);
+    explicit Freezer(Core::Timing::CoreTiming& core_timing_, Core::Memory::Memory& memory_);
     ~Freezer();
 
     // Enables or disables the entire memory freezer.
@@ -82,7 +82,7 @@ private:
 
     std::shared_ptr<Core::Timing::EventType> event;
     Core::Timing::CoreTiming& core_timing;
-    Memory::Memory& memory;
+    Core::Memory::Memory& memory;
 };
 
 } // namespace Tools

src/tests/core/arm/arm_test_common.cpp

@@ -6,6 +6,7 @@
 
 #include "common/page_table.h"
 #include "core/core.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
 #include "core/memory.h"
 #include "tests/core/arm/arm_test_common.h"
@@ -18,12 +19,7 @@ TestEnvironment::TestEnvironment(bool mutable_memory_)
     auto& system = Core::System::GetInstance();
 
     auto process = Kernel::Process::Create(system, "", Kernel::Process::ProcessType::Userland);
-    page_table = &process->VMManager().page_table;
-
-    std::fill(page_table->pointers.begin(), page_table->pointers.end(), nullptr);
-    page_table->special_regions.clear();
-    std::fill(page_table->attributes.begin(), page_table->attributes.end(),
-              Common::PageType::Unmapped);
+    page_table = &process->PageTable().PageTableImpl();
 
     system.Memory().MapIoRegion(*page_table, 0x00000000, 0x80000000, test_memory);
     system.Memory().MapIoRegion(*page_table, 0x80000000, 0x80000000, test_memory);

src/video_core/memory_manager.cpp

@@ -6,8 +6,8 @@
 #include "common/assert.h"
 #include "common/logging/log.h"
 #include "core/core.h"
+#include "core/hle/kernel/memory/page_table.h"
 #include "core/hle/kernel/process.h"
-#include "core/hle/kernel/vm_manager.h"
 #include "core/memory.h"
 #include "video_core/gpu.h"
 #include "video_core/memory_manager.h"
@@ -17,10 +17,7 @@ namespace Tegra {
 
 MemoryManager::MemoryManager(Core::System& system, VideoCore::RasterizerInterface& rasterizer)
     : rasterizer{rasterizer}, system{system} {
-    std::fill(page_table.pointers.begin(), page_table.pointers.end(), nullptr);
-    std::fill(page_table.attributes.begin(), page_table.attributes.end(),
-              Common::PageType::Unmapped);
-    page_table.Resize(address_space_width);
+    page_table.Resize(address_space_width, page_bits, false);
 
     // Initialize the map with a single free region covering the entire managed space.
     VirtualMemoryArea initial_vma;
@@ -55,9 +52,9 @@ GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, u64 size) {
 
     MapBackingMemory(gpu_addr, system.Memory().GetPointer(cpu_addr), aligned_size, cpu_addr);
     ASSERT(system.CurrentProcess()
-               ->VMManager()
-               .SetMemoryAttribute(cpu_addr, size, Kernel::MemoryAttribute::DeviceMapped,
-                                   Kernel::MemoryAttribute::DeviceMapped)
+               ->PageTable()
+               .SetMemoryAttribute(cpu_addr, size, Kernel::Memory::MemoryAttribute::DeviceShared,
+                                   Kernel::Memory::MemoryAttribute::DeviceShared)
                .IsSuccess());
 
     return gpu_addr;
@@ -70,9 +67,9 @@ GPUVAddr MemoryManager::MapBufferEx(VAddr cpu_addr, GPUVAddr gpu_addr, u64 size)
 
     MapBackingMemory(gpu_addr, system.Memory().GetPointer(cpu_addr), aligned_size, cpu_addr);
     ASSERT(system.CurrentProcess()
-               ->VMManager()
-               .SetMemoryAttribute(cpu_addr, size, Kernel::MemoryAttribute::DeviceMapped,
-                                   Kernel::MemoryAttribute::DeviceMapped)
+               ->PageTable()
+               .SetMemoryAttribute(cpu_addr, size, Kernel::Memory::MemoryAttribute::DeviceShared,
+                                   Kernel::Memory::MemoryAttribute::DeviceShared)
                .IsSuccess());
     return gpu_addr;
 }
@@ -89,9 +86,10 @@ GPUVAddr MemoryManager::UnmapBuffer(GPUVAddr gpu_addr, u64 size) {
 
     UnmapRange(gpu_addr, aligned_size);
     ASSERT(system.CurrentProcess()
-               ->VMManager()
-               .SetMemoryAttribute(cpu_addr.value(), size, Kernel::MemoryAttribute::DeviceMapped,
-                                   Kernel::MemoryAttribute::None)
+               ->PageTable()
+               .SetMemoryAttribute(cpu_addr.value(), size,
+                                   Kernel::Memory::MemoryAttribute::DeviceShared,
+                                   Kernel::Memory::MemoryAttribute::None)
                .IsSuccess());
 
     return gpu_addr;
@@ -147,16 +145,8 @@ T MemoryManager::Read(GPUVAddr addr) const {
         return value;
     }
 
-    switch (page_table.attributes[addr >> page_bits]) {
-    case Common::PageType::Unmapped:
-        LOG_ERROR(HW_GPU, "Unmapped Read{} @ 0x{:08X}", sizeof(T) * 8, addr);
-        return 0;
-    case Common::PageType::Memory:
-        ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", addr);
-        break;
-    default:
     UNREACHABLE();
-    }
+
     return {};
 }
 
@@ -173,17 +163,7 @@ void MemoryManager::Write(GPUVAddr addr, T data) {
         return;
     }
 
-    switch (page_table.attributes[addr >> page_bits]) {
-    case Common::PageType::Unmapped:
-        LOG_ERROR(HW_GPU, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
-                  static_cast<u32>(data), addr);
-        return;
-    case Common::PageType::Memory:
-        ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", addr);
-        break;
-    default:
     UNREACHABLE();
-    }
 }
 
 template u8 MemoryManager::Read<u8>(GPUVAddr addr) const;
@@ -249,18 +229,11 @@ void MemoryManager::ReadBlock(GPUVAddr src_addr, void* dest_buffer, const std::s
         const std::size_t copy_amount{
             std::min(static_cast<std::size_t>(page_size) - page_offset, remaining_size)};
 
-        switch (page_table.attributes[page_index]) {
-        case Common::PageType::Memory: {
         const VAddr src_addr{page_table.backing_addr[page_index] + page_offset};
         // Flush must happen on the rasterizer interface, such that memory is always synchronous
         // when it is read (even when in asynchronous GPU mode). Fixes Dead Cells title menu.
         rasterizer.FlushRegion(src_addr, copy_amount);
         memory.ReadBlockUnsafe(src_addr, dest_buffer, copy_amount);
-            break;
-        }
-        default:
-            UNREACHABLE();
-        }
 
         page_index++;
         page_offset = 0;
@@ -305,18 +278,11 @@ void MemoryManager::WriteBlock(GPUVAddr dest_addr, const void* src_buffer, const
         const std::size_t copy_amount{
             std::min(static_cast<std::size_t>(page_size) - page_offset, remaining_size)};
 
-        switch (page_table.attributes[page_index]) {
-        case Common::PageType::Memory: {
         const VAddr dest_addr{page_table.backing_addr[page_index] + page_offset};
         // Invalidate must happen on the rasterizer interface, such that memory is always
         // synchronous when it is written (even when in asynchronous GPU mode).
         rasterizer.InvalidateRegion(dest_addr, copy_amount);
         memory.WriteBlockUnsafe(dest_addr, src_buffer, copy_amount);
-            break;
-        }
-        default:
-            UNREACHABLE();
-        }
 
         page_index++;
         page_offset = 0;
@@ -362,8 +328,8 @@ void MemoryManager::CopyBlockUnsafe(GPUVAddr dest_addr, GPUVAddr src_addr, const
 
 bool MemoryManager::IsGranularRange(GPUVAddr gpu_addr, std::size_t size) {
     const VAddr addr = page_table.backing_addr[gpu_addr >> page_bits];
-    const std::size_t page = (addr & Memory::PAGE_MASK) + size;
-    return page <= Memory::PAGE_SIZE;
+    const std::size_t page = (addr & Core::Memory::PAGE_MASK) + size;
+    return page <= Core::Memory::PAGE_SIZE;
 }
 
 void MemoryManager::MapPages(GPUVAddr base, u64 size, u8* memory, Common::PageType type,
@@ -375,12 +341,13 @@ void MemoryManager::MapPages(GPUVAddr base, u64 size, u8* memory, Common::PageTy
     ASSERT_MSG(end <= page_table.pointers.size(), "out of range mapping at {:016X}",
                base + page_table.pointers.size());
 
-    std::fill(page_table.attributes.begin() + base, page_table.attributes.begin() + end, type);
-
     if (memory == nullptr) {
-        std::fill(page_table.pointers.begin() + base, page_table.pointers.begin() + end, memory);
-        std::fill(page_table.backing_addr.begin() + base, page_table.backing_addr.begin() + end,
-                  backing_addr);
+        while (base != end) {
+            page_table.pointers[base] = nullptr;
+            page_table.backing_addr[base] = 0;
+
+            base += 1;
+        }
     } else {
         while (base != end) {
             page_table.pointers[base] = memory;

src/video_core/memory_manager.h

@@ -179,7 +179,7 @@ private:
     /// End of address space, based on address space in bits.
     static constexpr GPUVAddr address_space_end{1ULL << address_space_width};
 
-    Common::BackingPageTable page_table{page_bits};
+    Common::PageTable page_table;
     VMAMap vma_map;
     VideoCore::RasterizerInterface& rasterizer;
 

src/video_core/rasterizer_accelerated.cpp

@@ -23,15 +23,15 @@ constexpr auto RangeFromInterval(Map& map, const Interval& interval) {
 
 } // Anonymous namespace
 
-RasterizerAccelerated::RasterizerAccelerated(Memory::Memory& cpu_memory_)
+RasterizerAccelerated::RasterizerAccelerated(Core::Memory::Memory& cpu_memory_)
     : cpu_memory{cpu_memory_} {}
 
 RasterizerAccelerated::~RasterizerAccelerated() = default;
 
 void RasterizerAccelerated::UpdatePagesCachedCount(VAddr addr, u64 size, int delta) {
     std::lock_guard lock{pages_mutex};
-    const u64 page_start{addr >> Memory::PAGE_BITS};
-    const u64 page_end{(addr + size + Memory::PAGE_SIZE - 1) >> Memory::PAGE_BITS};
+    const u64 page_start{addr >> Core::Memory::PAGE_BITS};
+    const u64 page_end{(addr + size + Core::Memory::PAGE_SIZE - 1) >> Core::Memory::PAGE_BITS};
 
     // Interval maps will erase segments if count reaches 0, so if delta is negative we have to
     // subtract after iterating
@@ -44,8 +44,8 @@ void RasterizerAccelerated::UpdatePagesCachedCount(VAddr addr, u64 size, int del
         const auto interval = pair.first & pages_interval;
         const int count = pair.second;
 
-        const VAddr interval_start_addr = boost::icl::first(interval) << Memory::PAGE_BITS;
-        const VAddr interval_end_addr = boost::icl::last_next(interval) << Memory::PAGE_BITS;
+        const VAddr interval_start_addr = boost::icl::first(interval) << Core::Memory::PAGE_BITS;
+        const VAddr interval_end_addr = boost::icl::last_next(interval) << Core::Memory::PAGE_BITS;
         const u64 interval_size = interval_end_addr - interval_start_addr;
 
         if (delta > 0 && count == delta) {

src/video_core/rasterizer_accelerated.h

@@ -11,7 +11,7 @@
 #include "common/common_types.h"
 #include "video_core/rasterizer_interface.h"
 
-namespace Memory {
+namespace Core::Memory {
 class Memory;
 }
 
@@ -20,7 +20,7 @@ namespace VideoCore {
 /// Implements the shared part in GPU accelerated rasterizers in RasterizerInterface.
 class RasterizerAccelerated : public RasterizerInterface {
 public:
-    explicit RasterizerAccelerated(Memory::Memory& cpu_memory_);
+    explicit RasterizerAccelerated(Core::Memory::Memory& cpu_memory_);
     ~RasterizerAccelerated() override;
 
     void UpdatePagesCachedCount(VAddr addr, u64 size, int delta) override;
@@ -30,7 +30,7 @@ private:
     CachedPageMap cached_pages;
     std::mutex pages_mutex;
 
-    Memory::Memory& cpu_memory;
+    Core::Memory::Memory& cpu_memory;
 };
 
 } // namespace VideoCore