| * Dynamic DMA mapping support. |
| * We never have any address translations to worry about, so this |
| #include <linux/string.h> |
| void *dma_alloc_coherent(struct device *dev, size_t size, |
| dma_addr_t *dma_handle, int gfp) |
| /* ignore region specifiers */ |
| gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); |
| if (dev == NULL || (*dev->dma_mask < 0xffffffff)) |
| ret = (void *)__get_free_pages(gfp, get_order(size)); |
| *dma_handle = virt_to_phys(ret); |
| void dma_free_coherent(struct device *dev, size_t size, |
| void *vaddr, dma_addr_t dma_handle) |
| free_pages((unsigned long)vaddr, get_order(size)); |