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46 lines
1.1 KiB
C
46 lines
1.1 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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* Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
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* Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
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*
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*/
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#ifndef __ASM_MACH_GENERIC_DMA_COHERENCE_H
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#define __ASM_MACH_GENERIC_DMA_COHERENCE_H
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#if 0
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#define PCI_DMA_OFFSET 0x20000000
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#else
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#define PCI_DMA_OFFSET 0x00000000
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#endif
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struct device;
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static dma_addr_t plat_map_dma_mem(struct device *dev, void *addr, size_t size)
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{
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return virt_to_phys(addr) + (dev != NULL ? PCI_DMA_OFFSET : 0);
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}
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static dma_addr_t plat_map_dma_mem_page(struct device *dev, struct page *page)
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{
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return page_to_phys(page) + (dev != NULL ? PCI_DMA_OFFSET : 0);
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}
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static unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
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{
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return (dma_addr > PCI_DMA_OFFSET ? dma_addr - PCI_DMA_OFFSET : dma_addr);
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}
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static void plat_unmap_dma_mem(dma_addr_t dma_addr)
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{
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}
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static inline int plat_device_is_coherent(struct device *dev)
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{
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return 0;
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}
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#endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */
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