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
29