arch/arm/mach-footbridge/include/mach/io.h

   1 /*
   2  *  arch/arm/mach-footbridge/include/mach/io.h
   3  *
   4  *  Copyright (C) 1997-1999 Russell King
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  *  Modifications:
  11  *   06-12-1997 RMK     Created.
  12  *   07-04-1999 RMK     Major cleanup
  13  */
  14 #ifndef __ASM_ARM_ARCH_IO_H
  15 #define __ASM_ARM_ARCH_IO_H
  16
  17 #ifdef CONFIG_MMU
  18 #define MMU_IO(a, b)    (a)
  19 #else
  20 #define MMU_IO(a, b)    (b)
  21 #endif
  22
  23 #define PCIO_SIZE       0x00100000
  24 #define PCIO_BASE       MMU_IO(0xff000000, 0x7c000000)
  25
  26 #define IO_SPACE_LIMIT 0xffff
  27
  28 /*
  29  * Translation of various region addresses to virtual addresses
  30  */
  31 #define __io(a)                 ((void __iomem *)(PCIO_BASE + (a)))
  32 #if 1
  33 #define __mem_pci(a)            (a)
  34 #else
  35
  36 static inline void __iomem *___mem_pci(void __iomem *p)
  37 {
  38         unsigned long a = (unsigned long)p;
  39         BUG_ON(a <= 0xc0000000 || a >= 0xe0000000);
  40         return p;
  41 }
  42
  43 #define __mem_pci(a)            ___mem_pci(a)
  44 #endif
  45
  46 #endif