blob: 8140e053ccd351332f33d3df8decccfdeb86074b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
/*
* linux/arch/unicore32/include/asm/dma-mapping.h
*
* Code specific to PKUnity SoC and UniCore ISA
*
* Copyright (C) 2001-2010 GUAN Xue-tao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __UNICORE_DMA_MAPPING_H__
#define __UNICORE_DMA_MAPPING_H__
#ifdef __KERNEL__
#include <linux/mm_types.h>
#include <linux/scatterlist.h>
#include <linux/swiotlb.h>
#include <asm/memory.h>
#include <asm/cacheflush.h>
extern struct dma_map_ops swiotlb_dma_map_ops;
static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
return &swiotlb_dma_map_ops;
}
#include <asm-generic/dma-mapping-common.h>
static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
if (dev && dev->dma_mask)
return addr + size - 1 <= *dev->dma_mask;
return 1;
}
static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
return paddr;
}
static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
{
return daddr;
}
static inline void dma_mark_clean(void *addr, size_t size) {}
static inline void dma_cache_sync(struct device *dev, void *vaddr,
size_t size, enum dma_data_direction direction)
{
unsigned long start = (unsigned long)vaddr;
unsigned long end = start + size;
switch (direction) {
case DMA_NONE:
BUG();
case DMA_FROM_DEVICE:
case DMA_BIDIRECTIONAL: /* writeback and invalidate */
__cpuc_dma_flush_range(start, end);
break;
case DMA_TO_DEVICE: /* writeback only */
__cpuc_dma_clean_range(start, end);
break;
}
}
#endif /* __KERNEL__ */
#endif
|
