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#ifndef GUARD_DMA3_H
#define GUARD_DMA3_H
#include "global.h"
// Maximum amount of data we will transfer in one operation
#define MAX_DMA_BLOCK_SIZE 0x1000
#define DMA_REQUEST_COPY32 1
#define DMA_REQUEST_FILL32 2
#define DMA_REQUEST_COPY16 3
#define DMA_REQUEST_FILL16 4
#define DMA3_16BIT 0
#define DMA3_32BIT 1
#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)
// Cancel pending DMA3 requests
void ClearDma3Requests(void);
// Handle pending DMA3 requests
void ProcessDma3Requests(void);
// Copy size bytes from src to dest.
// mode takes a DMA3_*BIT macro
// Returns the request index
s16 RequestDma3Copy(const void *src, void *dest, u16 size, u8 mode);
// Fill size bytes at dest with value.
// mode takes a DMA3_*BIT macro
// Returns the request index
s16 RequestDma3Fill(s32 value, void *dest, u16 size, u8 mode);
// index is the return value from RequestDma3*
// if index = -1, will check if any request is pending
// otherwise, checks if the specified request is pending
// Returns -1 if pending, 0 otherwise
s16 WaitDma3Request(s16 index);
#endif // GUARD_DMA3_H
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