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
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