blob: 518ba5848dd6c921dec86e84942edeb687c57f0a [file] [log] [blame]
* 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.
#ifdef __KERNEL__
#include <linux/mm_types.h>
#include <linux/scatterlist.h>
#include <linux/swiotlb.h>
#include <asm/memory.h>
#include <asm/cacheflush.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) {}
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:
case DMA_BIDIRECTIONAL: /* writeback and invalidate */
__cpuc_dma_flush_range(start, end);
case DMA_TO_DEVICE: /* writeback only */
__cpuc_dma_clean_range(start, end);
#endif /* __KERNEL__ */