kernel: implement transfer memory
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7a0da729b4
commit
e797a917a9
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@ -2949,6 +2949,23 @@ Result KPageTable::UnlockForIpcUserBuffer(KProcessAddress address, size_t size)
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KMemoryAttribute::Locked, nullptr));
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}
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Result KPageTable::LockForTransferMemory(KPageGroup* out, KProcessAddress address, size_t size,
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KMemoryPermission perm) {
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R_RETURN(this->LockMemoryAndOpen(out, nullptr, address, size, KMemoryState::FlagCanTransfer,
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KMemoryState::FlagCanTransfer, KMemoryPermission::All,
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KMemoryPermission::UserReadWrite, KMemoryAttribute::All,
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KMemoryAttribute::None, perm, KMemoryAttribute::Locked));
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}
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Result KPageTable::UnlockForTransferMemory(KProcessAddress address, size_t size,
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const KPageGroup& pg) {
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R_RETURN(this->UnlockMemory(address, size, KMemoryState::FlagCanTransfer,
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KMemoryState::FlagCanTransfer, KMemoryPermission::None,
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KMemoryPermission::None, KMemoryAttribute::All,
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KMemoryAttribute::Locked, KMemoryPermission::UserReadWrite,
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KMemoryAttribute::Locked, std::addressof(pg)));
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}
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Result KPageTable::LockForCodeMemory(KPageGroup* out, KProcessAddress addr, size_t size) {
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R_RETURN(this->LockMemoryAndOpen(
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out, nullptr, addr, size, KMemoryState::FlagCanCodeMemory, KMemoryState::FlagCanCodeMemory,
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@ -104,6 +104,9 @@ public:
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Result CleanupForIpcServer(KProcessAddress address, size_t size, KMemoryState dst_state);
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Result CleanupForIpcClient(KProcessAddress address, size_t size, KMemoryState dst_state);
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Result LockForTransferMemory(KPageGroup* out, KProcessAddress address, size_t size,
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KMemoryPermission perm);
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Result UnlockForTransferMemory(KProcessAddress address, size_t size, const KPageGroup& pg);
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Result LockForCodeMemory(KPageGroup* out, KProcessAddress addr, size_t size);
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Result UnlockForCodeMemory(KProcessAddress addr, size_t size, const KPageGroup& pg);
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Result MakeAndOpenPageGroup(KPageGroup* out, KProcessAddress address, size_t num_pages,
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@ -1,6 +1,7 @@
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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include "common/scope_exit.h"
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#include "core/hle/kernel/k_process.h"
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#include "core/hle/kernel/k_resource_limit.h"
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#include "core/hle/kernel/k_transfer_memory.h"
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@ -9,28 +10,50 @@
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namespace Kernel {
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KTransferMemory::KTransferMemory(KernelCore& kernel)
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: KAutoObjectWithSlabHeapAndContainer{kernel} {}
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: KAutoObjectWithSlabHeapAndContainer{kernel}, m_lock{kernel} {}
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KTransferMemory::~KTransferMemory() = default;
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Result KTransferMemory::Initialize(KProcessAddress address, std::size_t size,
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Svc::MemoryPermission owner_perm) {
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Result KTransferMemory::Initialize(KProcessAddress addr, std::size_t size,
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Svc::MemoryPermission own_perm) {
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// Set members.
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m_owner = GetCurrentProcessPointer(m_kernel);
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// TODO(bunnei): Lock for transfer memory
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// Get the owner page table.
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auto& page_table = m_owner->GetPageTable();
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// Construct the page group, guarding to make sure our state is valid on exit.
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m_page_group.emplace(m_kernel, page_table.GetBlockInfoManager());
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auto pg_guard = SCOPE_GUARD({ m_page_group.reset(); });
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// Lock the memory.
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R_TRY(page_table.LockForTransferMemory(std::addressof(*m_page_group), addr, size,
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ConvertToKMemoryPermission(own_perm)));
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// Set remaining tracking members.
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m_owner->Open();
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m_owner_perm = owner_perm;
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m_address = address;
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m_size = size;
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m_owner_perm = own_perm;
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m_address = addr;
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m_is_initialized = true;
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m_is_mapped = false;
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// We succeeded.
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pg_guard.Cancel();
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R_SUCCEED();
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}
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void KTransferMemory::Finalize() {}
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void KTransferMemory::Finalize() {
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// Unlock.
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if (!m_is_mapped) {
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const size_t size = m_page_group->GetNumPages() * PageSize;
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ASSERT(R_SUCCEEDED(
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m_owner->GetPageTable().UnlockForTransferMemory(m_address, size, *m_page_group)));
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}
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// Close the page group.
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m_page_group->Close();
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m_page_group->Finalize();
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}
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void KTransferMemory::PostDestroy(uintptr_t arg) {
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KProcess* owner = reinterpret_cast<KProcess*>(arg);
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@ -38,4 +61,54 @@ void KTransferMemory::PostDestroy(uintptr_t arg) {
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owner->Close();
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}
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Result KTransferMemory::Map(KProcessAddress address, size_t size, Svc::MemoryPermission map_perm) {
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// Validate the size.
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R_UNLESS(m_page_group->GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
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// Validate the permission.
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R_UNLESS(m_owner_perm == map_perm, ResultInvalidState);
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// Lock ourselves.
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KScopedLightLock lk(m_lock);
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// Ensure we're not already mapped.
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R_UNLESS(!m_is_mapped, ResultInvalidState);
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// Map the memory.
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const KMemoryState state = (m_owner_perm == Svc::MemoryPermission::None)
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? KMemoryState::Transfered
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: KMemoryState::SharedTransfered;
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R_TRY(GetCurrentProcess(m_kernel).GetPageTable().MapPageGroup(
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address, *m_page_group, state, KMemoryPermission::UserReadWrite));
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// Mark ourselves as mapped.
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m_is_mapped = true;
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R_SUCCEED();
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}
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Result KTransferMemory::Unmap(KProcessAddress address, size_t size) {
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// Validate the size.
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R_UNLESS(m_page_group->GetNumPages() == Common::DivideUp(size, PageSize), ResultInvalidSize);
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// Lock ourselves.
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KScopedLightLock lk(m_lock);
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// Unmap the memory.
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const KMemoryState state = (m_owner_perm == Svc::MemoryPermission::None)
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? KMemoryState::Transfered
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: KMemoryState::SharedTransfered;
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R_TRY(GetCurrentProcess(m_kernel).GetPageTable().UnmapPageGroup(address, *m_page_group, state));
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// Mark ourselves as unmapped.
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ASSERT(m_is_mapped);
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m_is_mapped = false;
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R_SUCCEED();
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}
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size_t KTransferMemory::GetSize() const {
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return m_is_initialized ? m_page_group->GetNumPages() * PageSize : 0;
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}
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} // namespace Kernel
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@ -3,6 +3,9 @@
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#pragma once
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#include <optional>
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#include "core/hle/kernel/k_page_group.h"
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#include "core/hle/kernel/slab_helpers.h"
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#include "core/hle/kernel/svc_types.h"
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#include "core/hle/result.h"
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@ -48,16 +51,19 @@ public:
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return m_address;
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}
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size_t GetSize() const {
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return m_is_initialized ? m_size : 0;
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}
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size_t GetSize() const;
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Result Map(KProcessAddress address, size_t size, Svc::MemoryPermission map_perm);
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Result Unmap(KProcessAddress address, size_t size);
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private:
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std::optional<KPageGroup> m_page_group{};
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KProcess* m_owner{};
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KProcessAddress m_address{};
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KLightLock m_lock;
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Svc::MemoryPermission m_owner_perm{};
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size_t m_size{};
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bool m_is_initialized{};
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bool m_is_mapped{};
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};
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} // namespace Kernel
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@ -71,15 +71,59 @@ Result CreateTransferMemory(Core::System& system, Handle* out, u64 address, u64
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}
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Result MapTransferMemory(Core::System& system, Handle trmem_handle, uint64_t address, uint64_t size,
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MemoryPermission owner_perm) {
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UNIMPLEMENTED();
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R_THROW(ResultNotImplemented);
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MemoryPermission map_perm) {
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// Validate the address/size.
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R_UNLESS(Common::IsAligned(address, PageSize), ResultInvalidAddress);
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R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize);
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R_UNLESS(size > 0, ResultInvalidSize);
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R_UNLESS((address < address + size), ResultInvalidCurrentMemory);
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// Validate the permission.
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R_UNLESS(IsValidTransferMemoryPermission(map_perm), ResultInvalidState);
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// Get the transfer memory.
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KScopedAutoObject trmem = GetCurrentProcess(system.Kernel())
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.GetHandleTable()
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.GetObject<KTransferMemory>(trmem_handle);
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R_UNLESS(trmem.IsNotNull(), ResultInvalidHandle);
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// Verify that the mapping is in range.
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R_UNLESS(GetCurrentProcess(system.Kernel())
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.GetPageTable()
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.CanContain(address, size, KMemoryState::Transfered),
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ResultInvalidMemoryRegion);
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// Map the transfer memory.
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R_TRY(trmem->Map(address, size, map_perm));
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// We succeeded.
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R_SUCCEED();
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}
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Result UnmapTransferMemory(Core::System& system, Handle trmem_handle, uint64_t address,
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uint64_t size) {
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UNIMPLEMENTED();
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R_THROW(ResultNotImplemented);
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// Validate the address/size.
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R_UNLESS(Common::IsAligned(address, PageSize), ResultInvalidAddress);
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R_UNLESS(Common::IsAligned(size, PageSize), ResultInvalidSize);
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R_UNLESS(size > 0, ResultInvalidSize);
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R_UNLESS((address < address + size), ResultInvalidCurrentMemory);
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// Get the transfer memory.
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KScopedAutoObject trmem = GetCurrentProcess(system.Kernel())
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.GetHandleTable()
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.GetObject<KTransferMemory>(trmem_handle);
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R_UNLESS(trmem.IsNotNull(), ResultInvalidHandle);
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// Verify that the mapping is in range.
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R_UNLESS(GetCurrentProcess(system.Kernel())
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.GetPageTable()
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.CanContain(address, size, KMemoryState::Transfered),
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ResultInvalidMemoryRegion);
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// Unmap the transfer memory.
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R_TRY(trmem->Unmap(address, size));
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R_SUCCEED();
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}
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Result MapTransferMemory64(Core::System& system, Handle trmem_handle, uint64_t address,
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