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ac54c6a4e2
The PowerPC CPU has bits in MSR (DR and IR) which control whether addresses are translated. We should respect these instead of mixing physical addresses and translated addresses into the same address space. This is mostly mass-renaming calls to memory accesses APIs from places which expect address translation to use a different version from those which do not expect address translation. This does very little on its own, but it's the first step to a correct BAT implementation.
58 lines
1.3 KiB
C++
58 lines
1.3 KiB
C++
// Copyright 2013 Dolphin Emulator Project
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// Licensed under GPLv2
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// Refer to the license.txt file included.
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#pragma once
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#include <cstddef>
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#ifdef _WIN32
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#include <windows.h>
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#endif
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#include "Common/CommonTypes.h"
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// This class lets you create a block of anonymous RAM, and then arbitrarily map views into it.
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// Multiple views can mirror the same section of the block, which makes it very convenient for emulating
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// memory mirrors.
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class MemArena
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{
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public:
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void GrabSHMSegment(size_t size);
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void ReleaseSHMSegment();
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void *CreateView(s64 offset, size_t size, void *base = nullptr);
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void ReleaseView(void *view, size_t size);
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// This finds 1 GB in 32-bit, 16 GB in 64-bit.
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static u8 *FindMemoryBase();
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private:
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#ifdef _WIN32
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HANDLE hMemoryMapping;
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#else
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int fd;
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#endif
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};
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enum {
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MV_MIRROR_PREVIOUS = 1,
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MV_FAKE_VMEM = 2,
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MV_WII_ONLY = 4,
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};
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struct MemoryView
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{
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u8** out_ptr;
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u64 virtual_address;
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u32 size;
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u32 flags;
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void* mapped_ptr;
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void* view_ptr;
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u32 shm_position;
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};
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// Uses a memory arena to set up an emulator-friendly memory map according to
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// a passed-in list of MemoryView structures.
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u8 *MemoryMap_Setup(MemoryView *views, int num_views, u32 flags, MemArena *arena);
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void MemoryMap_Shutdown(MemoryView *views, int num_views, u32 flags, MemArena *arena);
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