mirror of https://gitee.com/openkylin/linux.git
47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
/*
|
|
* Copyright 2004-2009 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#ifndef _BLACKFIN_DMA_MAPPING_H
|
|
#define _BLACKFIN_DMA_MAPPING_H
|
|
|
|
#include <asm/cacheflush.h>
|
|
|
|
extern void
|
|
__dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir);
|
|
static inline void
|
|
__dma_sync_inline(dma_addr_t addr, size_t size, enum dma_data_direction dir)
|
|
{
|
|
switch (dir) {
|
|
case DMA_NONE:
|
|
BUG();
|
|
case DMA_TO_DEVICE: /* writeback only */
|
|
flush_dcache_range(addr, addr + size);
|
|
break;
|
|
case DMA_FROM_DEVICE: /* invalidate only */
|
|
case DMA_BIDIRECTIONAL: /* flush and invalidate */
|
|
/* Blackfin has no dedicated invalidate (it includes a flush) */
|
|
invalidate_dcache_range(addr, addr + size);
|
|
break;
|
|
}
|
|
}
|
|
static inline void
|
|
_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir)
|
|
{
|
|
if (__builtin_constant_p(dir))
|
|
__dma_sync_inline(addr, size, dir);
|
|
else
|
|
__dma_sync(addr, size, dir);
|
|
}
|
|
|
|
extern const struct dma_map_ops bfin_dma_ops;
|
|
|
|
static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
|
|
{
|
|
return &bfin_dma_ops;
|
|
}
|
|
|
|
#endif /* _BLACKFIN_DMA_MAPPING_H */
|