| /* | |
| * 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> | |
| #include <asm/memory.h> | |
| #include <asm/cacheflush.h> | |
| extern struct dma_map_ops swiotlb_dma_map_ops; | |
| static inline struct dma_map_ops *get_dma_ops(struct device *dev) | |
| { | |
| 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) {} | |
| static inline void dma_cache_sync(struct device *dev, void *vaddr, | |
| size_t size, enum dma_data_direction direction) | |
| { | |
| unsigned long start = (unsigned long)vaddr; | |
| unsigned long end = start + size; | |
| switch (direction) { | |
| case DMA_NONE: | |
| BUG(); | |
| case DMA_FROM_DEVICE: | |
| case DMA_BIDIRECTIONAL: /* writeback and invalidate */ | |
| __cpuc_dma_flush_range(start, end); | |
| break; | |
| case DMA_TO_DEVICE: /* writeback only */ | |
| __cpuc_dma_clean_range(start, end); | |
| break; | |
| } | |
| } | |
| #endif /* __KERNEL__ */ | |
| #endif |