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DMA: Batch multi-word transfers together

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This commit is contained in:
Connor McLaughlin
2019-10-13 16:48:11 +10:00
parent 88ec178380
commit ec8c5d4bb6
12 changed files with 273 additions and 149 deletions
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10
src/core/bus.h
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@ -38,16 +38,24 @@ public:
bool WriteByte(PhysicalMemoryAddress address, u8 value);
bool WriteHalfWord(PhysicalMemoryAddress address, u16 value);
bool WriteWord(PhysicalMemoryAddress address, u32 value);
template<MemoryAccessType type, MemoryAccessSize size>
TickCount DispatchAccess(PhysicalMemoryAddress address, u32& value);
// Optimized variant for burst/multi-word read/writing.
TickCount ReadWords(PhysicalMemoryAddress address, u32* words, u32 word_count);
TickCount WriteWords(PhysicalMemoryAddress address, const u32* words, u32 word_count);
void PatchBIOS(u32 address, u32 value, u32 mask = UINT32_C(0xFFFFFFFF));
void SetExpansionROM(std::vector<u8> data);
private:
enum : u32
{
RAM_BASE = 0x00000000,
RAM_SIZE = 0x200000,
RAM_MASK = RAM_SIZE - 1,
RAM_MIRROR_END = 0x800000,
EXP1_BASE = 0x1F000000,
EXP1_SIZE = 0x800000,
EXP1_MASK = EXP1_SIZE - 1,