io.h

 1/* SPDX-License-Identifier: GPL-2.0-only */
 2/*
 3 *  arch/arm/mach-rpc/include/mach/io.h
 4 *
 5 *  Copyright (C) 1997 Russell King
 6 *
 7 * Modifications:
 8 *  06-Dec-1997	RMK	Created.
 9 */
10#ifndef __ASM_ARM_ARCH_IO_H
11#define __ASM_ARM_ARCH_IO_H
12
13#include <mach/hardware.h>
14
15#define IO_SPACE_LIMIT 0xffff
16
17/*
18 * We need PC style IO addressing for:
19 *  - floppy (at 0x3f2,0x3f4,0x3f5,0x3f7)
20 *  - parport (at 0x278-0x27a, 0x27b-0x27f, 0x778-0x77a)
21 *  - 8250 serial (only for compile)
22 *
23 * These peripherals are found in an area of MMIO which looks very much
24 * like an ISA bus, but with registers at the low byte of each word.
25 */
26#define __io(a)		(PCIO_BASE + ((a) << 2))
27
28#endif