| 1 | /* |
|---|---|
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file COPYING in the main directory of this archive |
| 4 | * for more details. |
| 5 | */ |
| 6 | |
| 7 | #include <linux/dma-map-ops.h> |
| 8 | #include <linux/kernel.h> |
| 9 | #include <asm/cacheflush.h> |
| 10 | |
| 11 | #ifndef CONFIG_COLDFIRE |
| 12 | void arch_dma_prep_coherent(struct page *page, size_t size) |
| 13 | { |
| 14 | cache_push(page_to_phys(page), size); |
| 15 | } |
| 16 | |
| 17 | pgprot_t pgprot_dmacoherent(pgprot_t prot) |
| 18 | { |
| 19 | if (CPU_IS_040_OR_060) { |
| 20 | pgprot_val(prot) &= ~_PAGE_CACHE040; |
| 21 | pgprot_val(prot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S; |
| 22 | } else { |
| 23 | pgprot_val(prot) |= _PAGE_NOCACHE030; |
| 24 | } |
| 25 | return prot; |
| 26 | } |
| 27 | #endif /* CONFIG_MMU && !CONFIG_COLDFIRE */ |
| 28 | |
| 29 | void arch_sync_dma_for_device(phys_addr_t handle, size_t size, |
| 30 | enum dma_data_direction dir) |
| 31 | { |
| 32 | switch (dir) { |
| 33 | case DMA_BIDIRECTIONAL: |
| 34 | case DMA_TO_DEVICE: |
| 35 | cache_push(handle, size); |
| 36 | break; |
| 37 | case DMA_FROM_DEVICE: |
| 38 | cache_clear(handle, size); |
| 39 | break; |
| 40 | default: |
| 41 | pr_err_ratelimited("dma_sync_single_for_device: unsupported dir %u\n", |
| 42 | dir); |
| 43 | break; |
| 44 | } |
| 45 | } |
| 46 |