1 /*
2  * (C) Copyright 2007
3  * Stelian Pop <stelian@popies.net>
4  * Lead Tech Design <www.leadtechdesign.com>
5  *
6  * SPDX-License-Identifier:	GPL-2.0+
7  */
8 #ifndef __ASM_X86_DMA_MAPPING_H
9 #define __ASM_X86_DMA_MAPPING_H
10 
11 #define	dma_mapping_error(x, y)	0
12 
13 enum dma_data_direction {
14 	DMA_BIDIRECTIONAL	= 0,
15 	DMA_TO_DEVICE		= 1,
16 	DMA_FROM_DEVICE		= 2,
17 };
18 
19 static inline void *dma_alloc_coherent(size_t len, unsigned long *handle)
20 {
21 	*handle = (unsigned long)memalign(ARCH_DMA_MINALIGN, len);
22 	return (void *)*handle;
23 }
24 
25 static inline void dma_free_coherent(void *addr)
26 {
27 	free(addr);
28 }
29 
30 static inline unsigned long dma_map_single(volatile void *vaddr, size_t len,
31 					   enum dma_data_direction dir)
32 {
33 	return (unsigned long)vaddr;
34 }
35 
36 static inline void dma_unmap_single(volatile void *vaddr, size_t len,
37 				    unsigned long paddr)
38 {
39 }
40 
41 #endif /* __ASM_X86_DMA_MAPPING_H */
42