ab0d27fa896935555622e0975e16dec4313a2817
[muen/linux.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 #ifndef __ASSEMBLY__
19
20 #ifdef CONFIG_PCI
21
22 /* PCI mappings */
23 #define __virt_to_bus(x)        ((x) - PAGE_OFFSET + KS8695_PCIMEM_PA)
24 #define __bus_to_virt(x)        ((x) - KS8695_PCIMEM_PA + PAGE_OFFSET)
25
26 /* Platform-bus mapping */
27 extern struct bus_type platform_bus_type;
28 #define is_lbus_device(dev)             (dev && dev->bus == &platform_bus_type)
29 #define __arch_dma_to_virt(dev, x)      ({ (void *) (is_lbus_device(dev) ? \
30                                         __phys_to_virt(x) : __bus_to_virt(x)); })
31 #define __arch_virt_to_dma(dev, x)      ({ is_lbus_device(dev) ? \
32                                         (dma_addr_t)__virt_to_phys((unsigned long)x) \
33                                         : (dma_addr_t)__virt_to_bus(x); })
34 #define __arch_pfn_to_dma(dev, pfn)     \
35         ({ dma_addr_t __dma = __pfn_to_phys(pfn); \
36            if (!is_lbus_device(dev)) \
37                 __dma = __dma - PHYS_OFFSET + KS8695_PCIMEM_PA; \
38            __dma; })
39
40 #define __arch_dma_to_pfn(dev, x)       \
41         ({ dma_addr_t __dma = x;                                \
42            if (!is_lbus_device(dev))                            \
43                 __dma += PHYS_OFFSET - KS8695_PCIMEM_PA;        \
44            __phys_to_pfn(__dma);                                \
45         })
46
47 #endif
48
49 #endif
50
51 #endif