0d26449dd6
As we've got rid of the bit-31 set IO addresses, we can now use the standard inb() definitions and reduce the IO space limit to 64K. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
36 lines
890 B
C
36 lines
890 B
C
/*
|
|
* arch/arm/mach-rpc/include/mach/io.h
|
|
*
|
|
* Copyright (C) 1997 Russell King
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Modifications:
|
|
* 06-Dec-1997 RMK Created.
|
|
*/
|
|
#ifndef __ASM_ARM_ARCH_IO_H
|
|
#define __ASM_ARM_ARCH_IO_H
|
|
|
|
#include <mach/hardware.h>
|
|
|
|
#define IO_SPACE_LIMIT 0xffff
|
|
|
|
/*
|
|
* We need PC style IO addressing for:
|
|
* - floppy (at 0x3f2,0x3f4,0x3f5,0x3f7)
|
|
* - parport (at 0x278-0x27a, 0x27b-0x27f, 0x778-0x77a)
|
|
* - 8250 serial (only for compile)
|
|
*
|
|
* These peripherals are found in an area of MMIO which looks very much
|
|
* like an ISA bus, but with registers at the low byte of each word.
|
|
*/
|
|
#define __io(a) (PCIO_BASE + ((a) << 2))
|
|
|
|
/*
|
|
* 1:1 mapping for ioremapped regions.
|
|
*/
|
|
#define __mem_pci(x) (x)
|
|
|
|
#endif
|