Pull thermal into release branch
[linux-drm-fsl-dcu.git] / arch / m68knommu / kernel / dma.c
1 /*
2  * Dynamic DMA mapping support.
3  *
4  * We never have any address translations to worry about, so this
5  * is just alloc/free.
6  */
7
8 #include <linux/types.h>
9 #include <linux/mm.h>
10 #include <linux/string.h>
11 #include <asm/io.h>
12
13 void *dma_alloc_coherent(struct device *dev, size_t size,
14                            dma_addr_t *dma_handle, int gfp)
15 {
16         void *ret;
17         /* ignore region specifiers */
18         gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
19
20         if (dev == NULL || (*dev->dma_mask < 0xffffffff))
21                 gfp |= GFP_DMA;
22         ret = (void *)__get_free_pages(gfp, get_order(size));
23
24         if (ret != NULL) {
25                 memset(ret, 0, size);
26                 *dma_handle = virt_to_phys(ret);
27         }
28         return ret;
29 }
30
31 void dma_free_coherent(struct device *dev, size_t size,
32                          void *vaddr, dma_addr_t dma_handle)
33 {
34         free_pages((unsigned long)vaddr, get_order(size));
35 }