81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
|
// Copyright 2019 yuzu Emulator Project
|
||
|
|
// Licensed under GPLv2 or any later version
|
||
|
|
// Refer to the license.txt file included.
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <vector>
|
||
|
|
#include <boost/icl/interval_map.hpp>
|
||
|
|
#include "common/common_types.h"
|
||
|
|
#include "common/memory_hook.h"
|
||
|
|
|
||
|
|
namespace Common {
|
||
|
|
|
||
|
|
enum class PageType : u8 {
|
||
|
|
/// Page is unmapped and should cause an access error.
|
||
|
|
Unmapped,
|
||
|
|
/// Page is mapped to regular memory. This is the only type you can get pointers to.
|
||
|
|
Memory,
|
||
|
|
/// Page is mapped to regular memory, but also needs to check for rasterizer cache flushing and
|
||
|
|
/// invalidation
|
||
|
|
RasterizerCachedMemory,
|
||
|
|
/// Page is mapped to a I/O region. Writing and reading to this page is handled by functions.
|
||
|
|
Special,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct SpecialRegion {
|
||
|
|
enum class Type {
|
||
|
|
DebugHook,
|
||
|
|
IODevice,
|
||
|
|
} type;
|
||
|
|
|
||
|
|
MemoryHookPointer handler;
|
||
|
|
|
||
|
|
bool operator<(const SpecialRegion& other) const {
|
||
|
|
return std::tie(type, handler) < std::tie(other.type, other.handler);
|
||
|
|
}
|
||
|
|
|
||
|
|
bool operator==(const SpecialRegion& other) const {
|
||
|
|
return std::tie(type, handler) == std::tie(other.type, other.handler);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* A (reasonably) fast way of allowing switchable and remappable process address spaces. It loosely
|
||
|
|
* mimics the way a real CPU page table works.
|
||
|
|
*/
|
||
|
|
struct PageTable {
|
||
|
|
explicit PageTable(std::size_t page_size_in_bits);
|
||
|
|
~PageTable();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Resizes the page table to be able to accomodate enough pages within
|
||
|
|
* a given address space.
|
||
|
|
*
|
||
|
|
* @param address_space_width_in_bits The address size width in bits.
|
||
|
|
*/
|
||
|
|
void Resize(std::size_t address_space_width_in_bits);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Contains MMIO handlers that back memory regions whose entries in the `attribute` vector is
|
||
|
|
* of type `Special`.
|
||
|
|
*/
|
||
|
|
boost::icl::interval_map<VAddr, std::set<SpecialRegion>> special_regions;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* 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{};
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace Common
|