1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * (C) Copyright 2007 4 * Stelian Pop <stelian (at) popies.net> 5 * Lead Tech Design <www.leadtechdesign.com> 6 */ 7 #ifndef __ASM_ARM_DMA_MAPPING_H 8 #define __ASM_ARM_DMA_MAPPING_H 9 10 #include <linux/dma-direction.h> 11 12 #define dma_mapping_error(x, y) 0 13 14 static inline void *dma_alloc_coherent(size_t len, unsigned long *handle) 15 { 16 *handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len); 17 return (void *)*handle; 18 } 19 20 static inline void dma_free_coherent(void *addr) 21 { 22 free(addr); 23 } 24 25 static inline unsigned long dma_map_single(volatile void *vaddr, size_t len, 26 enum dma_data_direction dir) 27 { 28 return (unsigned long)vaddr; 29 } 30 31 static inline void dma_unmap_single(volatile void *vaddr, size_t len, 32 unsigned long paddr) 33 { 34 } 35 36 #endif /* __ASM_ARM_DMA_MAPPING_H */ 37
