mirror of
https://github.com/SourMesen/Mesen2.git
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30d28c83a5
This makes performance equal or slightly better to what it was before all of the recent accuracy improvements
63 lines
No EOL
1.4 KiB
C++
63 lines
No EOL
1.4 KiB
C++
#pragma once
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#include "pch.h"
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#include "SNES/SnesCpuTypes.h"
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#include "SNES/DmaControllerTypes.h"
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#include "Utilities/ISerializable.h"
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class SnesMemoryManager;
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class SnesDmaController final : public ISerializable
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{
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private:
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static constexpr uint8_t HdmaChannelFlag = 0x40;
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SnesDmaControllerState _state = {};
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bool _needToProcess = false;
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bool _hdmaPending = false;
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bool _hdmaInitPending = false;
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bool _dmaStartDelay = false;
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bool _dmaPending = false;
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uint32_t _dmaClockCounter = 0;
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uint8_t _activeChannel = 0; //Used by debugger's event viewer
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SnesMemoryManager *_memoryManager;
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void CopyDmaByte(uint32_t addressBusA, uint16_t addressBusB, bool fromBtoA);
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void RunDma(DmaChannelConfig &channel);
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void RunHdmaTransfer(DmaChannelConfig &channel);
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bool ProcessHdmaChannels();
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bool IsLastActiveHdmaChannel(uint8_t channel);
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bool InitHdmaChannels();
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void SyncStartDma();
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void SyncEndDma();
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void UpdateNeedToProcessFlag();
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bool HasActiveDmaChannel();
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public:
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SnesDmaController(SnesMemoryManager *memoryManager);
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SnesDmaControllerState& GetState();
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void Reset();
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void BeginHdmaTransfer();
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void BeginHdmaInit();
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__forceinline bool HasPendingTransfer() { return _needToProcess; }
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bool ProcessPendingTransfers();
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void Write(uint16_t addr, uint8_t value);
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uint8_t Read(uint16_t addr);
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uint8_t GetActiveChannel();
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DmaChannelConfig GetChannelConfig(uint8_t channel);
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void Serialize(Serializer &s) override;
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}; |