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

   1 /*
   2  *  arch/arm/mach-rpc/include/mach/io.h
   3  *
   4  *  Copyright (C) 1997 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-Dec-1997 RMK     Created.
  12  */
  13 #ifndef __ASM_ARM_ARCH_IO_H
  14 #define __ASM_ARM_ARCH_IO_H
  15
  16 #include <mach/hardware.h>
  17
  18 #define IO_SPACE_LIMIT 0xffff
  19
  20 /*
  21  * We need PC style IO addressing for:
  22  *  - floppy (at 0x3f2,0x3f4,0x3f5,0x3f7)
  23  *  - parport (at 0x278-0x27a, 0x27b-0x27f, 0x778-0x77a)
  24  *  - 8250 serial (only for compile)
  25  *
  26  * These peripherals are found in an area of MMIO which looks very much
  27  * like an ISA bus, but with registers at the low byte of each word.
  28  */
  29 #define __io(a)         (PCIO_BASE + ((a) << 2))
  30
  31 #endif