| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Russell King | 1234e3f | 2015-07-24 09:10:55 +0100 | [diff] [blame] | 2 | #ifndef DMA_H |
| 3 | #define DMA_H |
| 4 | |
| 5 | #include <asm/glue-cache.h> |
| 6 | |
| 7 | #ifndef MULTI_CACHE |
| 8 | #define dmac_map_area __glue(_CACHE,_dma_map_area) |
| 9 | #define dmac_unmap_area __glue(_CACHE,_dma_unmap_area) |
| 10 | |
| 11 | /* |
| 12 | * These are private to the dma-mapping API. Do not use directly. |
| 13 | * Their sole purpose is to ensure that data held in the cache |
| 14 | * is visible to DMA, or data written by DMA to system memory is |
| 15 | * visible to the CPU. |
| 16 | */ |
| 17 | extern void dmac_map_area(const void *, size_t, int); |
| 18 | extern void dmac_unmap_area(const void *, size_t, int); |
| 19 | |
| 20 | #else |
| 21 | |
| 22 | /* |
| 23 | * These are private to the dma-mapping API. Do not use directly. |
| 24 | * Their sole purpose is to ensure that data held in the cache |
| 25 | * is visible to DMA, or data written by DMA to system memory is |
| 26 | * visible to the CPU. |
| 27 | */ |
| 28 | #define dmac_map_area cpu_cache.dma_map_area |
| 29 | #define dmac_unmap_area cpu_cache.dma_unmap_area |
| 30 | |
| 31 | #endif |
| 32 | |
| 33 | #endif |