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CPU/Recompiler: Implement LUT-based fastmem

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This commit is contained in:
Connor McLaughlin
2020-11-23 01:06:25 +10:00
parent 44b3c9be6e
commit bf2e38aed5
26 changed files with 1177 additions and 454 deletions
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18
src/core/bus.h
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@ -82,10 +82,15 @@ enum : size_t
// Offsets within the memory arena.
MEMORY_ARENA_RAM_OFFSET = 0,
#ifdef WITH_FASTMEM
#ifdef WITH_MMAP_FASTMEM
// Fastmem region size is 4GB to cover the entire 32-bit address space.
FASTMEM_REGION_SIZE = UINT64_C(0x100000000)
FASTMEM_REGION_SIZE = UINT64_C(0x100000000),
#endif
RAM_CODE_PAGE_COUNT = (RAM_SIZE + (HOST_PAGE_SIZE + 1)) / HOST_PAGE_SIZE,
FASTMEM_LUT_NUM_PAGES = 0x100000, // 0x100000000 >> 12
FASTMEM_LUT_NUM_SLOTS = FASTMEM_LUT_NUM_PAGES * 2,
};
bool Initialize();
@ -93,15 +98,14 @@ void Shutdown();
void Reset();
bool DoState(StateWrapper& sw);
#ifdef WITH_FASTMEM
void UpdateFastmemViews(bool enabled, bool isolate_cache);
CPUFastmemMode GetFastmemMode();
void UpdateFastmemViews(CPUFastmemMode mode, bool isolate_cache);
bool CanUseFastmemForAddress(VirtualMemoryAddress address);
#endif
void SetExpansionROM(std::vector<u8> data);
void SetBIOS(const std::vector<u8>& image);
extern std::bitset<CPU_CODE_CACHE_PAGE_COUNT> m_ram_code_bits;
extern std::bitset<RAM_CODE_PAGE_COUNT> m_ram_code_bits;
extern u8* g_ram; // 2MB RAM
extern u8 g_bios[BIOS_SIZE]; // 512K BIOS ROM
@ -114,7 +118,7 @@ ALWAYS_INLINE static bool IsRAMAddress(PhysicalMemoryAddress address)
/// Returns the code page index for a RAM address.
ALWAYS_INLINE static u32 GetRAMCodePageIndex(PhysicalMemoryAddress address)
{
return (address & RAM_MASK) / CPU_CODE_CACHE_PAGE_SIZE;
return (address & RAM_MASK) / HOST_PAGE_SIZE;
}
/// Returns true if the specified page contains code.