50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
/*
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* linux/arch/unicore32/include/asm/dma-mapping.h
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __UNICORE_DMA_MAPPING_H__
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#define __UNICORE_DMA_MAPPING_H__
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#ifdef __KERNEL__
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#include <linux/mm_types.h>
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#include <linux/scatterlist.h>
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#include <linux/swiotlb.h>
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extern const struct dma_map_ops swiotlb_dma_map_ops;
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static inline const struct dma_map_ops *get_arch_dma_ops(struct bus_type *bus)
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{
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return &swiotlb_dma_map_ops;
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}
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static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
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{
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if (dev && dev->dma_mask)
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return addr + size - 1 <= *dev->dma_mask;
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return 1;
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}
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static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
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{
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return paddr;
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}
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static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
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{
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return daddr;
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}
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static inline void dma_mark_clean(void *addr, size_t size) {}
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#endif /* __KERNEL__ */
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#endif
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