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/*
Copyright 2016-2019 StapleButter
This file is part of melonDS.
melonDS is free software: you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with melonDS. If not, see http://www.gnu.org/licenses/.
*/
#ifndef DMA_H
#define DMA_H
#include "types.h"
class DMA
{
public:
DMA(u32 cpu, u32 num);
~DMA();
void Reset();
void DoSavestate(Savestate* file);
void WriteCnt(u32 val);
void Start();
s32 Run(s32 cycles);
bool IsInMode(u32 mode)
{
return ((mode == StartMode) && (Cnt & 0x80000000));
}
void StartIfNeeded(u32 mode)
{
if ((mode == StartMode) && (Cnt & 0x80000000))
Start();
}
void StopIfNeeded(u32 mode)
{
if (mode == StartMode)
Cnt &= ~0x80000000;
}
void StallIfRunning()
{
if (Executing) Stall = true;
}
u32 SrcAddr;
u32 DstAddr;
u32 Cnt;
private:
u32 CPU, Num;
u32 StartMode;
u32 CurSrcAddr;
u32 CurDstAddr;
u32 RemCount;
u32 IterCount;
u32 SrcAddrInc;
u32 DstAddrInc;
u32 CountMask;
bool Running;
bool InProgress;
bool Executing;
bool Stall;
bool IsGXFIFODMA;
};
#endif
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