release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-ixp23xx/include/mach/memory.h

   1 /*
   2  * arch/arm/mach-ixp23xx/include/mach/memory.h
   3  *
   4  * Copyright (c) 2003-2004 Intel Corp.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.
  10  */
  11
  12 #ifndef __ASM_ARCH_MEMORY_H
  13 #define __ASM_ARCH_MEMORY_H
  14
  15 #include <mach/hardware.h>
  16
  17 /*
  18  * Physical DRAM offset.
  19  */
  20 #define PHYS_OFFSET             (0x00000000)
  21
  22 #define IXP23XX_PCI_SDRAM_OFFSET (*((volatile int *)IXP23XX_PCI_SDRAM_BAR) & 0xfffffff0)
  23
  24 #define __phys_to_bus(x)        ((x) + (IXP23XX_PCI_SDRAM_OFFSET - PHYS_OFFSET))
  25 #define __bus_to_phys(x)        ((x) - (IXP23XX_PCI_SDRAM_OFFSET - PHYS_OFFSET))
  26
  27 #define __virt_to_bus(v)        __phys_to_bus(__virt_to_phys(v))
  28 #define __bus_to_virt(b)        __phys_to_virt(__bus_to_phys(b))
  29 #define __pfn_to_bus(p)         __phys_to_bus(__pfn_to_phys(p))
  30 #define __bus_to_pfn(b)         __phys_to_pfn(__bus_to_phys(b))
  31
  32 #define arch_is_coherent()      1
  33
  34 #endif