80 lines
No EOL
1.6 KiB
C++
80 lines
No EOL
1.6 KiB
C++
#pragma once
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#include "stdafx.h"
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#include "CpuTypes.h"
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#include "../Utilities/ISerializable.h"
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class MemoryManager;
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struct DmaChannelConfig
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{
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bool DmaActive;
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bool InvertDirection;
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bool Decrement;
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bool FixedTransfer;
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bool HdmaIndirectAddressing;
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uint8_t TransferMode;
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uint16_t SrcAddress;
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uint8_t SrcBank;
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uint16_t TransferSize;
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uint8_t DestAddress;
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uint16_t HdmaTableAddress;
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uint8_t HdmaBank;
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uint8_t HdmaLineCounterAndRepeat;
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bool DoTransfer;
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bool HdmaFinished;
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bool UnusedFlag;
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};
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class DmaController final : public ISerializable
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{
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private:
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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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uint8_t _hdmaChannels = 0;
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bool _dmaPending = false;
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uint64_t _dmaStartClock = 0;
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uint8_t _activeChannel = 0; //Used by debugger's event viewer
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DmaChannelConfig _channel[8] = {};
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MemoryManager *_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 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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DmaController(MemoryManager *memoryManager);
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void Reset();
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void BeginHdmaTransfer();
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void BeginHdmaInit();
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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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}; |