diff options
Diffstat (limited to 'arch/sh/mm')
-rw-r--r-- | arch/sh/mm/consistent.c | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c index 1622ae6b9dbd..792f36129062 100644 --- a/arch/sh/mm/consistent.c +++ b/arch/sh/mm/consistent.c @@ -1,10 +1,6 @@ /* - * arch/sh/mm/consistent.c - * * Copyright (C) 2004 - 2007 Paul Mundt * - * Declared coherent memory functions based on arch/x86/kernel/pci-dma_32.c - * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. @@ -13,83 +9,7 @@ #include <linux/init.h> #include <linux/platform_device.h> #include <linux/dma-mapping.h> -#include <linux/dma-debug.h> #include <linux/io.h> -#include <linux/module.h> -#include <linux/gfp.h> -#include <asm/cacheflush.h> -#include <asm/addrspace.h> - -void *dma_generic_alloc_coherent(struct device *dev, size_t size, - dma_addr_t *dma_handle, gfp_t gfp, - unsigned long attrs) -{ - 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. - */ - sh_sync_dma_for_device(ret, size, DMA_BIDIRECTIONAL); - - ret_nocache = (void __force *)ioremap_nocache(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 dma_generic_free_coherent(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); -} - -void sh_sync_dma_for_device(void *vaddr, size_t size, - enum dma_data_direction direction) -{ - void *addr = sh_cacheop_vaddr(vaddr); - - switch (direction) { - case DMA_FROM_DEVICE: /* invalidate only */ - __flush_invalidate_region(addr, size); - break; - case DMA_TO_DEVICE: /* writeback only */ - __flush_wback_region(addr, size); - break; - case DMA_BIDIRECTIONAL: /* writeback and invalidate */ - __flush_purge_region(addr, size); - break; - default: - BUG(); - } -} static int __init memchunk_setup(char *str) { |