47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
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/*
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* Copyright 2004-2009 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef _BLACKFIN_DMA_MAPPING_H
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#define _BLACKFIN_DMA_MAPPING_H
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#include <asm/cacheflush.h>
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extern void
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__dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir);
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static inline void
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__dma_sync_inline(dma_addr_t addr, size_t size, enum dma_data_direction dir)
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{
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switch (dir) {
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case DMA_NONE:
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BUG();
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case DMA_TO_DEVICE: /* writeback only */
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flush_dcache_range(addr, addr + size);
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break;
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case DMA_FROM_DEVICE: /* invalidate only */
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case DMA_BIDIRECTIONAL: /* flush and invalidate */
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/* Blackfin has no dedicated invalidate (it includes a flush) */
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invalidate_dcache_range(addr, addr + size);
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break;
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}
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}
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static inline void
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_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir)
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{
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if (__builtin_constant_p(dir))
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__dma_sync_inline(addr, size, dir);
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else
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__dma_sync(addr, size, dir);
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}
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extern const struct dma_map_ops bfin_dma_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 &bfin_dma_ops;
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}
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#endif /* _BLACKFIN_DMA_MAPPING_H */
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