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