i386_get_ioperm.c

来自「基于组件方式开发操作系统的OSKIT源代码」· C语言 代码 · 共 58 行

/*-
 * Copyright (c) 1998 Jonathan Lemon
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	$Id: i386_get_ioperm.c,v 1.2 1998/07/28 15:22:35 jlemon Exp $
 */

#if defined(LIBC_RCS) && !defined(lint)
static const char rcsid[] = "$Id: i386_get_ioperm.c,v 1.2 1998/07/28 15:22:35 jlemon Exp $";
#endif /* LIBC_RCS and not lint */

#include <machine/sysarch.h>

struct parms {
	unsigned int 	start;
	unsigned int	length;
        int	 	enable;
};

int
i386_get_ioperm(unsigned int start, unsigned int *length, int *enable)
{
	struct parms p;
	int error;

	p.start = start;
	p.length = *length;
	p.enable = *enable;

	error = sysarch(I386_GET_IOPERM, (char *)&p);

	*length = p.length;
	*enable = p.enable;

	return (error);
}