diff options
Diffstat (limited to 'arch/arm/mm/dma.h')
| -rw-r--r-- | arch/arm/mm/dma.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/arm/mm/dma.h b/arch/arm/mm/dma.h new file mode 100644 index 0000000000..aaef64b7f1 --- /dev/null +++ b/arch/arm/mm/dma.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef DMA_H +#define DMA_H + +#include <asm/glue-cache.h> + +#ifndef MULTI_CACHE +#define dmac_map_area __glue(_CACHE,_dma_map_area) +#define dmac_unmap_area __glue(_CACHE,_dma_unmap_area) + +/* + * These are private to the dma-mapping API. Do not use directly. + * Their sole purpose is to ensure that data held in the cache + * is visible to DMA, or data written by DMA to system memory is + * visible to the CPU. + */ +extern void dmac_map_area(const void *, size_t, int); +extern void dmac_unmap_area(const void *, size_t, int); + +#else + +/* + * These are private to the dma-mapping API. Do not use directly. + * Their sole purpose is to ensure that data held in the cache + * is visible to DMA, or data written by DMA to system memory is + * visible to the CPU. + */ +#define dmac_map_area cpu_cache.dma_map_area +#define dmac_unmap_area cpu_cache.dma_unmap_area + +#endif + +#endif |