tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 2006 Ralf Baechle <ralf@linux-mips.org>
7 *
8 */
9#ifndef __ASM_MACH_GENERIC_DMA_COHERENCE_H
10#define __ASM_MACH_GENERIC_DMA_COHERENCE_H
11
12struct device;
13
14static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
15 size_t size)
16{
17 return virt_to_phys(addr);
18}
19
20static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
21 struct page *page)
22{
23 return page_to_phys(page);
24}
25
26static inline unsigned long plat_dma_addr_to_phys(dma_addr_t dma_addr)
27{
28 return dma_addr;
29}
30
31static inline void plat_unmap_dma_mem(dma_addr_t dma_addr)
32{
33}
34
35static inline int plat_device_is_coherent(struct device *dev)
36{
37#ifdef CONFIG_DMA_COHERENT
38 return 1;
39#endif
40#ifdef CONFIG_DMA_NONCOHERENT
41 return 0;
42#endif
43}
44
45#endif /* __ASM_MACH_GENERIC_DMA_COHERENCE_H */