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