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