Merge commit 'v2.6.39' into 20110526
[linux-2.6.git] / arch / arm / mach-ks8695 / include / mach / memory.h
1 /*
2  * arch/arm/mach-ks8695/include/mach/memory.h
3  *
4  * Copyright (C) 2006 Andrew Victor
5  *
6  * KS8695 Memory definitions
7  *
8  * This file is licensed under  the terms of the GNU General Public
9  * License version 2. This program is licensed "as is" without any
10  * warranty of any kind, whether express or implied.
11  */
12
13 #ifndef __ASM_ARCH_MEMORY_H
14 #define __ASM_ARCH_MEMORY_H
15
16 #include <mach/hardware.h>
17
18 /*
19  * Physical SRAM offset.
20  */
21 #define PLAT_PHYS_OFFSET                KS8695_SDRAM_PA
22
23 #ifndef __ASSEMBLY__
24
25 #ifdef CONFIG_PCI
26
27 /* PCI mappings */
28 #define __virt_to_bus(x)        ((x) - PAGE_OFFSET + KS8695_PCIMEM_PA)
29 #define __bus_to_virt(x)        ((x) - KS8695_PCIMEM_PA + PAGE_OFFSET)
30
31 /* Platform-bus mapping */
32 extern struct bus_type platform_bus_type;
33 #define is_lbus_device(dev)             (dev && dev->bus == &platform_bus_type)
34 #define __arch_dma_to_virt(dev, x)      ({ (void *) (is_lbus_device(dev) ? \
35                                         __phys_to_virt(x) : __bus_to_virt(x)); })
36 #define __arch_virt_to_dma(dev, x)      ({ is_lbus_device(dev) ? \
37                                         (dma_addr_t)__virt_to_phys(x) : (dma_addr_t)__virt_to_bus(x); })
38 #define __arch_pfn_to_dma(dev, pfn)     \
39         ({ dma_addr_t __dma = __pfn_to_phys(pfn); \
40            if (!is_lbus_device(dev)) \
41                 __dma = __dma - PHYS_OFFSET + KS8695_PCIMEM_PA; \
42            __dma; })
43
44 #define __arch_dma_to_pfn(dev, x)       \
45         ({ dma_addr_t __dma = x;                                \
46            if (!is_lbus_device(dev))                            \
47                 __dma += PHYS_OFFSET - KS8695_PCIMEM_PA;        \
48            __phys_to_pfn(__dma);                                \
49         })
50
51 #endif
52
53 #endif
54
55 #endif