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