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
9 #include <linux/dma-noncoherent.h>
10 #include <linux/device.h>
11 #include <linux/kernel.h>
12 #include <linux/platform_device.h>
13 #include <linux/scatterlist.h>
14 #include <linux/slab.h>
15 #include <linux/vmalloc.h>
16 #include <linux/export.h>
18 #include <asm/pgalloc.h>
20 #if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
21 void arch_dma_prep_coherent(struct page *page, size_t size)
23 cache_push(page_to_phys(page), size);
26 pgprot_t pgprot_dmacoherent(pgprot_t prot)
28 if (CPU_IS_040_OR_060) {
29 pgprot_val(prot) &= ~_PAGE_CACHE040;
30 pgprot_val(prot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
32 pgprot_val(prot) |= _PAGE_NOCACHE030;
38 #include <asm/cacheflush.h>
40 void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
41 gfp_t gfp, unsigned long attrs)
45 if (dev == NULL || (*dev->dma_mask < 0xffffffff))
47 ret = (void *)__get_free_pages(gfp, get_order(size));
51 *dma_handle = virt_to_phys(ret);
56 void arch_dma_free(struct device *dev, size_t size, void *vaddr,
57 dma_addr_t dma_handle, unsigned long attrs)
59 free_pages((unsigned long)vaddr, get_order(size));
62 #endif /* CONFIG_MMU && !CONFIG_COLDFIRE */
64 void arch_sync_dma_for_device(phys_addr_t handle, size_t size,
65 enum dma_data_direction dir)
68 case DMA_BIDIRECTIONAL:
70 cache_push(handle, size);
73 cache_clear(handle, size);
76 pr_err_ratelimited("dma_sync_single_for_device: unsupported dir %u\n",