Linux Kernel  3.7.1
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memory.h
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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((unsigned long)x) \
38  : (dma_addr_t)__virt_to_bus(x); })
39 #define __arch_pfn_to_dma(dev, pfn) \
40  ({ dma_addr_t __dma = __pfn_to_phys(pfn); \
41  if (!is_lbus_device(dev)) \
42  __dma = __dma - PHYS_OFFSET + KS8695_PCIMEM_PA; \
43  __dma; })
44 
45 #define __arch_dma_to_pfn(dev, x) \
46  ({ dma_addr_t __dma = x; \
47  if (!is_lbus_device(dev)) \
48  __dma += PHYS_OFFSET - KS8695_PCIMEM_PA; \
49  __phys_to_pfn(__dma); \
50  })
51 
52 #endif
53 
54 #endif
55 
56 #endif