Review changes for #819 and merge

1 files changed, 55 insertions, 0 deletions

diff --git a/gflib/dma3.h b/gflib/dma3.h
new file mode 100644
index 000000000..8eff34f55
--- /dev/null
+++ b/gflib/dma3.h
@@ -0,0 +1,55 @@
+#ifndef GUARD_DMA3_H
+#define GUARD_DMA3_H
+
+// Maximum amount of data we will transfer in one operation
+#define MAX_DMA_BLOCK_SIZE 0x1000
+
+#define Dma3CopyLarge_(src, dest, size, bit)               \
+{                                                          \
+    const void *_src = src;                                \
+    void *_dest = dest;                                    \
+    u32 _size = size;                                      \
+    while (1)                                              \
+    {                                                      \
+        if (_size <= MAX_DMA_BLOCK_SIZE)                   \
+        {                                                  \
+            DmaCopy##bit(3, _src, _dest, _size);           \
+            break;                                         \
+        }                                                  \
+        DmaCopy##bit(3, _src, _dest, MAX_DMA_BLOCK_SIZE);  \
+        _src += MAX_DMA_BLOCK_SIZE;                        \
+        _dest += MAX_DMA_BLOCK_SIZE;                       \
+        _size -= MAX_DMA_BLOCK_SIZE;                       \
+    }                                                      \
+}
+
+#define Dma3CopyLarge16_(src, dest, size) Dma3CopyLarge_(src, dest, size, 16)
+#define Dma3CopyLarge32_(src, dest, size) Dma3CopyLarge_(src, dest, size, 32)
+
+#define Dma3FillLarge_(value, dest, size, bit)             \
+{                                                          \
+    void *_dest = dest;                                    \
+    u32 _size = size;                                      \
+    while (1)                                              \
+    {                                                      \
+        if (_size <= MAX_DMA_BLOCK_SIZE)                   \
+        {                                                  \
+            DmaFill##bit(3, value, _dest, _size);          \
+            break;                                         \
+        }                                                  \
+        DmaFill##bit(3, value, _dest, MAX_DMA_BLOCK_SIZE); \
+        _dest += MAX_DMA_BLOCK_SIZE;                       \
+        _size -= MAX_DMA_BLOCK_SIZE;                       \
+    }                                                      \
+}
+
+#define Dma3FillLarge16_(value, dest, size) Dma3FillLarge_(value, dest, size, 16)
+#define Dma3FillLarge32_(value, dest, size) Dma3FillLarge_(value, dest, size, 32)
+
+void ClearDma3Requests(void);
+void ProcessDma3Requests(void);
+s16 RequestDma3Copy(const void *src, void *dest, u16 size, u8 mode);
+s16 RequestDma3Fill(s32 value, void *dest, u16 size, u8 mode);
+s16 CheckForSpaceForDma3Request(s16 index);
+
+#endif // GUARD_DMA3_H