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/*
This file is based on:
$XFree86: xc/programs/Xserver/hw/xfree86/etc/scanpci.c,v 3.34.2.17 1998/11/10 11:55:40 dawes Exp $
Modified for readability by Nick Kurshev
*/
/*
* Copyright 1995 by Robin Cutshaw <robin@XFree86.Org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the names of the above listed copyright holder(s)
* not be used in advertising or publicity pertaining to distribution of
* the software without specific, written prior permission. The above listed
* copyright holder(s) make(s) no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* THE ABOVE LISTED COPYRIGHT HOLDER(S) DISCLAIM(S) ALL WARRANTIES WITH REGARD
* TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS, IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE
* LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
* DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <errno.h>
#include <sys/param.h>
#include <sys/file.h>
#include <machine/sysarch.h>
#ifndef GCCUSESGAS
#define GCCUSESGAS
#endif
static int io_fd;
static __inline__ int enable_os_io(void)
{
io_fd = -1 ;
#if !defined(USE_I386_IOPL)
if ((io_fd = open("/dev/io", O_RDWR, 0)) < 0) {
perror("/dev/io");
return errno;
}
#else
if (i386_iopl(1) < 0) {
perror("i386_iopl");
return errno;
}
#endif /* USE_I386_IOPL */
return 0;
}
static __inline__ int disable_os_io(void)
{
#if !defined(USE_I386_IOPL)
close(io_fd);
#else
if (i386_iopl(0) < 0) {
perror("i386_iopl");
return errno;
}
#endif /* NetBSD1_1 */
return 0;
}
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