blob: b152f0ef30c04f4a1e13104318b72c8da248a21f (
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
|
/*
* Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
* Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
#ifndef __ASM_ARCH_MEMORY_H
#define __ASM_ARCH_MEMORY_H
#include <asm/page.h>
#include <asm/sizes.h>
/*
* Physical DRAM offset.
*/
#define PHYS_OFFSET UL(0x40000000)
#ifndef __ASSEMBLY__
#ifdef CONFIG_DMA_ZONE_SIZE
#define MXC_DMA_ZONE_SIZE ((CONFIG_DMA_ZONE_SIZE * SZ_1M) >> PAGE_SHIFT)
#else
#define MXC_DMA_ZONE_SIZE ((12 * SZ_1M) >> PAGE_SHIFT)
#endif
static inline void __arch_adjust_zones(int node, unsigned long *zone_size,
unsigned long *zhole_size)
{
if (node != 0)
return;
/* Create separate zone to reserve memory for DMA */
zone_size[1] = zone_size[0] - MXC_DMA_ZONE_SIZE;
zone_size[0] = MXC_DMA_ZONE_SIZE;
zhole_size[1] = zhole_size[0];
zhole_size[0] = 0;
}
#define arch_adjust_zones(node, size, holes) \
__arch_adjust_zones(node, size, holes)
#endif
/*
* Virtual view <-> DMA view memory address translations
* virt_to_bus: Used to translate the virtual address to an
* address suitable to be passed to set_dma_addr
* bus_to_virt: Used to convert an address for DMA operations
* to an address that the kernel can use.
*/
#define __virt_to_bus(x) __virt_to_phys(x)
#define __bus_to_virt(x) __phys_to_virt(x)
#define ISA_DMA_THRESHOLD (0x0003ffffULL)
#define CONSISTENT_DMA_SIZE SZ_32M
#endif
|
