From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- arch/m68knommu/kernel/dma.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 arch/m68knommu/kernel/dma.c (limited to 'arch/m68knommu/kernel/dma.c') diff --git a/arch/m68knommu/kernel/dma.c b/arch/m68knommu/kernel/dma.c new file mode 100644 index 000000000000..14b19c4161f4 --- /dev/null +++ b/arch/m68knommu/kernel/dma.c @@ -0,0 +1,36 @@ +/* + * Dynamic DMA mapping support. + * + * We never have any address translations to worry about, so this + * is just alloc/free. + */ + +#include +#include +#include +#include +#include + +void *dma_alloc_coherent(struct device *dev, size_t size, + dma_addr_t *dma_handle, int gfp) +{ + void *ret; + /* ignore region specifiers */ + gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); + + if (dev == NULL || (*dev->dma_mask < 0xffffffff)) + gfp |= GFP_DMA; + ret = (void *)__get_free_pages(gfp, get_order(size)); + + if (ret != NULL) { + memset(ret, 0, size); + *dma_handle = virt_to_phys(ret); + } + return 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)); +} -- cgit v1.2.3