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Linux/arch/arm/mach-ks8695/include/mach/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 #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
 52 

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