1/* 2 * Copyright (C) 2013 Andes Technology Corporation 3 * Ken Kuo, Andes Technology Corporation <ken_kuo@andestech.com> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7#ifndef __ASM_NDS_DMA_MAPPING_H 8#define __ASM_NDS_DMA_MAPPING_H 9 10enum dma_data_direction { 11 DMA_BIDIRECTIONAL = 0, 12 DMA_TO_DEVICE = 1, 13 DMA_FROM_DEVICE = 2, 14}; 15 16static void *dma_alloc_coherent(size_t len, unsigned long *handle) 17{ 18 *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len); 19 return (void *)*handle; 20} 21 22static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, 23 enum dma_data_direction dir) 24{ 25 return (unsigned long)vaddr; 26} 27 28static inline void dma_unmap_single(volatile void *vaddr, size_t len, 29 unsigned long paddr) 30{ 31} 32 33#endif /* __ASM_NDS_DMA_MAPPING_H */ 34