forked from luck/tmp_suning_uos_patched
sh: Add SH-5 support to the consistent DMA impl.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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@ -1,7 +1,7 @@
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/*
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* arch/sh/mm/consistent.c
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*
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* Copyright (C) 2004 Paul Mundt
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* Copyright (C) 2004 - 2007 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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@ -16,7 +16,7 @@
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void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *handle)
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{
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struct page *page, *end, *free;
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void *ret;
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void *ret, *vp;
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int order;
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size = PAGE_ALIGN(size);
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@ -28,13 +28,20 @@ void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *handle)
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split_page(page, order);
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ret = page_address(page);
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memset(ret, 0, size);
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*handle = virt_to_phys(ret);
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vp = ioremap_nocache(*handle, size);
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if (!vp) {
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free_pages((unsigned long)ret, order);
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return NULL;
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}
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memset(vp, 0, size);
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/*
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* We must flush the cache before we pass it on to the device
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*/
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__flush_purge_region(ret, size);
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dma_cache_sync(NULL, ret, size, DMA_BIDIRECTIONAL);
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page = virt_to_page(ret);
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free = page + (size >> PAGE_SHIFT);
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@ -47,24 +54,31 @@ void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *handle)
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}
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}
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return P2SEGADDR(ret);
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return vp;
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}
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EXPORT_SYMBOL(consistent_alloc);
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void consistent_free(void *vaddr, size_t size)
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void consistent_free(void *vaddr, size_t size, dma_addr_t dma_handle)
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{
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unsigned long addr = P1SEGADDR((unsigned long)vaddr);
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struct page *page=virt_to_page(addr);
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int num_pages=(size+PAGE_SIZE-1) >> PAGE_SHIFT;
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int i;
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struct page *page;
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unsigned long addr;
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for(i=0;i<num_pages;i++) {
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__free_page((page+i));
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}
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addr = (unsigned long)phys_to_virt((unsigned long)dma_handle);
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page = virt_to_page(addr);
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free_pages(addr, get_order(size));
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iounmap(vaddr);
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}
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EXPORT_SYMBOL(consistent_free);
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void consistent_sync(void *vaddr, size_t size, int direction)
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{
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void * p1addr = (void*) P1SEGADDR((unsigned long)vaddr);
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#ifdef CONFIG_CPU_SH5
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void *p1addr = vaddr;
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#else
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void *p1addr = (void*) P1SEGADDR((unsigned long)vaddr);
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#endif
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switch (direction) {
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case DMA_FROM_DEVICE: /* invalidate only */
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@ -80,8 +94,4 @@ void consistent_sync(void *vaddr, size_t size, int direction)
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BUG();
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}
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}
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EXPORT_SYMBOL(consistent_alloc);
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EXPORT_SYMBOL(consistent_free);
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EXPORT_SYMBOL(consistent_sync);
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@ -10,7 +10,7 @@ extern struct bus_type pci_bus_type;
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/* arch/sh/mm/consistent.c */
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extern void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *handle);
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extern void consistent_free(void *vaddr, size_t size);
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extern void consistent_free(void *vaddr, size_t size, dma_addr_t handle);
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extern void consistent_sync(void *vaddr, size_t size, int direction);
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#define dma_supported(dev, mask) (1)
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@ -50,7 +50,7 @@ static inline void dma_free_coherent(struct device *dev, size_t size,
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return;
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}
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consistent_free(vaddr, size);
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consistent_free(vaddr, size, dma_handle);
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}
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#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
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