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Diffstat (limited to 'arch/sh/kernel/dma-coherent.c')
-rw-r--r--arch/sh/kernel/dma-coherent.c51
1 files changed, 2 insertions, 49 deletions
diff --git a/arch/sh/kernel/dma-coherent.c b/arch/sh/kernel/dma-coherent.c
index d4811691b93c..cd46a9825e3c 100644
--- a/arch/sh/kernel/dma-coherent.c
+++ b/arch/sh/kernel/dma-coherent.c
@@ -3,60 +3,13 @@
* Copyright (C) 2004 - 2007 Paul Mundt
*/
#include <linux/mm.h>
-#include <linux/init.h>
#include <linux/dma-noncoherent.h>
-#include <linux/module.h>
#include <asm/cacheflush.h>
#include <asm/addrspace.h>
-void *arch_dma_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
- gfp_t gfp, unsigned long attrs)
+void arch_dma_prep_coherent(struct page *page, size_t size)
{
- void *ret, *ret_nocache;
- int order = get_order(size);
-
- gfp |= __GFP_ZERO;
-
- ret = (void *)__get_free_pages(gfp, order);
- if (!ret)
- return NULL;
-
- /*
- * Pages from the page allocator may have data present in
- * cache. So flush the cache before using uncached memory.
- */
- arch_sync_dma_for_device(virt_to_phys(ret), size,
- DMA_BIDIRECTIONAL);
-
- ret_nocache = (void __force *)ioremap(virt_to_phys(ret), size);
- if (!ret_nocache) {
- free_pages((unsigned long)ret, order);
- return NULL;
- }
-
- split_page(pfn_to_page(virt_to_phys(ret) >> PAGE_SHIFT), order);
-
- *dma_handle = virt_to_phys(ret);
- if (!WARN_ON(!dev))
- *dma_handle -= PFN_PHYS(dev->dma_pfn_offset);
-
- return ret_nocache;
-}
-
-void arch_dma_free(struct device *dev, size_t size, void *vaddr,
- dma_addr_t dma_handle, unsigned long attrs)
-{
- int order = get_order(size);
- unsigned long pfn = (dma_handle >> PAGE_SHIFT);
- int k;
-
- if (!WARN_ON(!dev))
- pfn += dev->dma_pfn_offset;
-
- for (k = 0; k < (1 << order); k++)
- __free_pages(pfn_to_page(pfn + k), 0);
-
- iounmap(vaddr);
+ __flush_purge_region(page_address(page), size);
}
void arch_sync_dma_for_device(phys_addr_t paddr, size_t size,