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
32