104 lines
2.2 KiB
C++
104 lines
2.2 KiB
C++
/*
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Copyright 2016-2023 melonDS team
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This file is part of melonDS.
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melonDS is free software: you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with melonDS. If not, see http://www.gnu.org/licenses/.
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*/
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#ifndef DSI_NDMA_H
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#define DSI_NDMA_H
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#include "types.h"
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#include "Savestate.h"
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namespace melonDS
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{
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class DSi;
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class DSi_NDMA
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{
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public:
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DSi_NDMA(u32 cpu, u32 num, melonDS::DSi& dsi);
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~DSi_NDMA();
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void Reset();
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void DoSavestate(Savestate* file);
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void WriteCnt(u32 val);
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void Start();
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void Run();
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void Run9();
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void Run7();
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bool IsInMode(u32 mode)
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{
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return ((mode == StartMode) && (Cnt & 0x80000000));
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}
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bool IsRunning() { return Running!=0; }
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void StartIfNeeded(u32 mode)
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{
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if ((mode == StartMode) && (Cnt & 0x80000000))
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Start();
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}
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void StopIfNeeded(u32 mode)
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{
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if (mode == StartMode)
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Cnt &= ~0x80000000;
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}
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void StallIfRunning()
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{
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if (Executing) Stall = true;
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}
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u32 SrcAddr;
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u32 DstAddr;
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u32 TotalLength; // total length, when transferring multiple blocks
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u32 BlockLength; // length of one transfer
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u32 SubblockTimer; // optional delay between subblocks (only in round-robin mode)
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u32 FillData;
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u32 Cnt;
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private:
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melonDS::DSi& DSi;
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u32 CPU, Num;
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u32 StartMode;
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u32 CurSrcAddr;
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u32 CurDstAddr;
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u32 SubblockLength; // length transferred per run when delay is used
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u32 RemCount;
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u32 IterCount;
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u32 TotalRemCount;
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u32 SrcAddrInc;
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u32 DstAddrInc;
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u32 Running;
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bool InProgress;
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bool Executing;
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bool Stall;
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bool IsGXFIFODMA;
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};
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}
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#endif // DSI_NDMA_H
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