| /* |
| * (C) Copyright 2007 |
| * Stelian Pop <stelian@popies.net> |
| * Lead Tech Design <www.leadtechdesign.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| #ifndef __ASM_ARM_DMA_MAPPING_H |
| #define __ASM_ARM_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_ARM_DMA_MAPPING_H */ |
