DMA support!

DMA.h

@@ -0,0 +1,56 @@
+/*
+    Copyright 2016-2017 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 WriteCnt(u32 val);
+    void Start();
+
+    void StartIfNeeded(u32 mode)
+    {
+        if ((mode == StartMode) && (Cnt & 0x80000000))
+            Start();
+    }
+
+    u32 SrcAddr;
+    u32 DstAddr;
+    u32 Cnt;
+
+private:
+    u32 CPU, Num;
+
+    u32 StartMode;
+    u32 CurSrcAddr;
+    u32 CurDstAddr;
+    u32 RemCount;
+    u32 SrcAddrInc;
+    u32 DstAddrInc;
+};
+
+#endif