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https://github.com/torvalds/linux
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8126cab004
dma.c doesn't need most of the headers it includes. Also there is no point in undefining the DEBUG symbol given that it isn't used anywhere in this small file. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Greg Ungerer <gerg@linux-m68k.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Greg Ungerer <gerg@linux-m68k.org>
46 lines
1 KiB
C
46 lines
1 KiB
C
/*
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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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* for more details.
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*/
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#include <linux/dma-map-ops.h>
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#include <linux/kernel.h>
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#include <asm/cacheflush.h>
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#ifndef CONFIG_COLDFIRE
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void arch_dma_prep_coherent(struct page *page, size_t size)
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{
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cache_push(page_to_phys(page), size);
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}
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pgprot_t pgprot_dmacoherent(pgprot_t prot)
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{
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if (CPU_IS_040_OR_060) {
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pgprot_val(prot) &= ~_PAGE_CACHE040;
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pgprot_val(prot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
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} else {
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pgprot_val(prot) |= _PAGE_NOCACHE030;
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}
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return prot;
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}
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#endif /* CONFIG_MMU && !CONFIG_COLDFIRE */
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void arch_sync_dma_for_device(phys_addr_t handle, size_t size,
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enum dma_data_direction dir)
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{
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switch (dir) {
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case DMA_BIDIRECTIONAL:
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case DMA_TO_DEVICE:
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cache_push(handle, size);
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break;
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case DMA_FROM_DEVICE:
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cache_clear(handle, size);
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break;
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default:
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pr_err_ratelimited("dma_sync_single_for_device: unsupported dir %u\n",
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dir);
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break;
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}
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}
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