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, 07  Ralf Baechle <ralf@linux-mips.org>
 7 * Copyright (C) 2007 Lemote, Inc. & Institute of Computing Technology
 8 * Author: Fuxin Zhang, zhangfx@lemote.com
 9 *
10 */
11#ifndef __ASM_MACH_LOONGSON_DMA_COHERENCE_H
12#define __ASM_MACH_LOONGSON_DMA_COHERENCE_H
13
14struct device;
15
16static inline dma_addr_t plat_map_dma_mem(struct device *dev, void *addr,
17					  size_t size)
18{
19	return virt_to_phys(addr) | 0x80000000;
20}
21
22static inline dma_addr_t plat_map_dma_mem_page(struct device *dev,
23					       struct page *page)
24{
25	return page_to_phys(page) | 0x80000000;
26}
27
28static inline unsigned long plat_dma_addr_to_phys(struct device *dev,
29	dma_addr_t dma_addr)
30{
31#if defined(CONFIG_CPU_LOONGSON2F) && defined(CONFIG_64BIT)
32	return (dma_addr > 0x8fffffff) ? dma_addr : (dma_addr & 0x0fffffff);
33#else
34	return dma_addr & 0x7fffffff;
35#endif
36}
37
38static inline void plat_unmap_dma_mem(struct device *dev, dma_addr_t dma_addr,
39	size_t size, enum dma_data_direction direction)
40{
41}
42
43static inline int plat_dma_supported(struct device *dev, u64 mask)
44{
45	/*
46	 * we fall back to GFP_DMA when the mask isn't all 1s,
47	 * so we can't guarantee allocations that must be
48	 * within a tighter range than GFP_DMA..
49	 */
50	if (mask < DMA_BIT_MASK(24))
51		return 0;
52
53	return 1;
54}
55
56static inline void plat_extra_sync_for_device(struct device *dev)
57{
58}
59
60static inline int plat_dma_mapping_error(struct device *dev,
61					 dma_addr_t dma_addr)
62{
63	return 0;
64}
65
66static inline int plat_device_is_coherent(struct device *dev)
67{
68	return 0;
69}
70
71#endif /* __ASM_MACH_LOONGSON_DMA_COHERENCE_H */