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 
10 enum dma_data_direction {
11 	DMA_BIDIRECTIONAL	= 0,
12 	DMA_TO_DEVICE		= 1,
13 	DMA_FROM_DEVICE		= 2,
14 };
15 
16 static 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 
22 static 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 
28 static 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