diff options
| -rw-r--r-- | arch/nds32/include/asm/dma-mapping.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/nds32/include/asm/dma-mapping.h b/arch/nds32/include/asm/dma-mapping.h new file mode 100644 index 0000000..25e5a1b --- /dev/null +++ b/arch/nds32/include/asm/dma-mapping.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2013 Andes Technology Corporation + * Ken Kuo, Andes Technology Corporation <ken_kuo@andestech.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#ifndef __ASM_NDS_DMA_MAPPING_H +#define __ASM_NDS_DMA_MAPPING_H + +enum dma_data_direction { + DMA_BIDIRECTIONAL = 0, + DMA_TO_DEVICE = 1, + DMA_FROM_DEVICE = 2, +}; + +static void *dma_alloc_coherent(size_t len, unsigned long *handle) +{ + *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len); + return (void *)*handle; +} + +static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, + enum dma_data_direction dir) +{ + return (unsigned long)vaddr; +} + +static inline void dma_unmap_single(volatile void *vaddr, size_t len, + unsigned long paddr) +{ +} + +#endif /* __ASM_NDS_DMA_MAPPING_H */ |