LXR linux/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 */
  27extern 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