io.h

一个微型操作系统源码

/*
 * OSV
 * Copyright (C) 2002 Ciprian DOSOFTEI <[e-mail]>
 * All rights reserved.
 * 
 * http://backster.free.fr/osv
 *
 * This file is part of the OSV project. OSV is free software, also known as
 * "open source"; you can redistribute it and/or modify it under the terms 
 * of the GNU General Public License (GPL), version 2, as published by the Free
 * Software Foundation (FSF). To explore alternate licensing terms, contact 
 * the author at [e-mail] or [phone].
 * 
 * OSV is distributed in the hope that it will be useful, but WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GPL for more details.  You should have
 * received a copy of the GPL along with OSV; see the file COPYING.  If
 * not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
 */
 
#include <asm/types.h>

#define io_wait()   inb(0x80)

#define inl(port) \
({ dword _tmp__; \
	asm volatile("inl %1, %0" : "=a" (_tmp__) : "d" ((word)(port))); \
	_tmp__; })
#define inportl(port) inl(port)

#define inw(port) \
({ word _tmp__; \
	asm volatile(".byte 0x66; inl %1, %0" : "=a" (_tmp__) : "d" ((word)(port))); \
	_tmp__; })
#define inportw(port) inw(port)

#define inb(port) \
({ byte _tmp__; \
	asm volatile("inb %1, %0" : "=a" (_tmp__) : "d" ((word)(port))); \
	_tmp__; })
#define inportb(port) inb(port)

#define outl(port, val) \
({ asm volatile("outl %0, %1" : : "a" ((dword)val) , "d" ((word)(port))); })
#define outportl(port, val) outl(port, val)

#define outw(port, val) \
({asm volatile(".byte 0x66; outl %0, %1" : : "a" ((word)(val)) , "d" ((word)(port))); })
#define outportw(port, val) outw(port, val)

#define outb(port, val) \
({ asm volatile("outb %0, %1" : : "a" ((byte)(val)) , "d" ((word)(port))); })
#define outportb(port, val) outb(port, val)