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
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