| /* |
| * 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 |
