Mesen2/Core/SNES/SnesDmaController.h
Sour 30d28c83a5 SNES: Performance improvements
This makes performance equal or slightly better to what it was before all of the recent accuracy improvements
2024-12-24 22:56:57 +09:00

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1.4 KiB
C++

#pragma once
#include "pch.h"
#include "SNES/SnesCpuTypes.h"
#include "SNES/DmaControllerTypes.h"
#include "Utilities/ISerializable.h"
class SnesMemoryManager;
class SnesDmaController final : public ISerializable
{
private:
static constexpr uint8_t HdmaChannelFlag = 0x40;
SnesDmaControllerState _state = {};
bool _needToProcess = false;
bool _hdmaPending = false;
bool _hdmaInitPending = false;
bool _dmaStartDelay = false;
bool _dmaPending = false;
uint32_t _dmaClockCounter = 0;
uint8_t _activeChannel = 0; //Used by debugger's event viewer
SnesMemoryManager *_memoryManager;
void CopyDmaByte(uint32_t addressBusA, uint16_t addressBusB, bool fromBtoA);
void RunDma(DmaChannelConfig &channel);
void RunHdmaTransfer(DmaChannelConfig &channel);
bool ProcessHdmaChannels();
bool IsLastActiveHdmaChannel(uint8_t channel);
bool InitHdmaChannels();
void SyncStartDma();
void SyncEndDma();
void UpdateNeedToProcessFlag();
bool HasActiveDmaChannel();
public:
SnesDmaController(SnesMemoryManager *memoryManager);
SnesDmaControllerState& GetState();
void Reset();
void BeginHdmaTransfer();
void BeginHdmaInit();
__forceinline bool HasPendingTransfer() { return _needToProcess; }
bool ProcessPendingTransfers();
void Write(uint16_t addr, uint8_t value);
uint8_t Read(uint16_t addr);
uint8_t GetActiveChannel();
DmaChannelConfig GetChannelConfig(uint8_t channel);
void Serialize(Serializer &s) override;
};