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80 lines
1.8 KiB
80 lines
1.8 KiB
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file COPYING in the main directory of this archive |
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* for more details. |
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*/ |
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#undef DEBUG |
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#include <linux/dma-map-ops.h> |
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#include <linux/device.h> |
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#include <linux/kernel.h> |
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#include <linux/platform_device.h> |
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#include <linux/scatterlist.h> |
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#include <linux/slab.h> |
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#include <linux/vmalloc.h> |
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#include <linux/export.h> |
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#include <asm/cacheflush.h> |
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#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE) |
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void arch_dma_prep_coherent(struct page *page, size_t size) |
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{ |
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cache_push(page_to_phys(page), size); |
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} |
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pgprot_t pgprot_dmacoherent(pgprot_t prot) |
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{ |
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if (CPU_IS_040_OR_060) { |
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pgprot_val(prot) &= ~_PAGE_CACHE040; |
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pgprot_val(prot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S; |
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} else { |
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pgprot_val(prot) |= _PAGE_NOCACHE030; |
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} |
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return prot; |
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} |
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#else |
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#include <asm/cacheflush.h> |
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void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle, |
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gfp_t gfp, unsigned long attrs) |
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{ |
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void *ret; |
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if (dev == NULL || (*dev->dma_mask < 0xffffffff)) |
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gfp |= GFP_DMA; |
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ret = (void *)__get_free_pages(gfp, get_order(size)); |
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if (ret != NULL) { |
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memset(ret, 0, size); |
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*dma_handle = virt_to_phys(ret); |
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} |
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return ret; |
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} |
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void arch_dma_free(struct device *dev, size_t size, void *vaddr, |
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dma_addr_t dma_handle, unsigned long attrs) |
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{ |
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free_pages((unsigned long)vaddr, get_order(size)); |
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} |
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#endif /* CONFIG_MMU && !CONFIG_COLDFIRE */ |
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void arch_sync_dma_for_device(phys_addr_t handle, size_t size, |
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enum dma_data_direction dir) |
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{ |
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switch (dir) { |
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case DMA_BIDIRECTIONAL: |
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case DMA_TO_DEVICE: |
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cache_push(handle, size); |
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break; |
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case DMA_FROM_DEVICE: |
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cache_clear(handle, size); |
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break; |
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default: |
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pr_err_ratelimited("dma_sync_single_for_device: unsupported dir %u\n", |
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dir); |
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break; |
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} |
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}
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