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 __virt_to_bus(v)                                                \
  23         ({ unsigned int ret;                                            \
  24         ret = ((__virt_to_phys(v) - 0x00000000) +                       \
  25          (*((volatile int *)IXP23XX_PCI_SDRAM_BAR) & 0xfffffff0));      \
  26         ret; })
  27
  28 #define __bus_to_virt(b)                                                \
  29         ({ unsigned int data;                                           \
  30         data = *((volatile int *)IXP23XX_PCI_SDRAM_BAR);                \
  31          __phys_to_virt((((b - (data & 0xfffffff0)) + 0x00000000))); })
  32
  33 #define arch_is_coherent()      1
  34
  35 #endif