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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
*/
#include <errno.h>
#ifdef __i386__
#include <sys/perm.h>
#else
#ifndef __sparc__
#include <sys/io.h>
#endif
#endif
#include "config.h"
#ifdef CONFIG_DHAHELPER
#include <fcntl.h>
int dhahelper_initialized = 0;
int dhahelper_fd = 0;
#endif
#if defined(__sparc__) || defined(__powerpc__)
#define iopl(x) (0)
#endif
static __inline__ int enable_os_io(void)
{
#ifdef CONFIG_DHAHELPER
dhahelper_fd = open("/dev/dhahelper", O_RDWR);
if (dhahelper_fd > 0)
{
dhahelper_initialized = 1;
return(0);
}
dhahelper_initialized = -1;
#endif
if (iopl(3) != 0)
return(errno);
return(0);
}
static __inline__ int disable_os_io(void)
{
#ifdef CONFIG_DHAHELPER
if (dhahelper_initialized == 1)
close(dhahelper_fd);
else
#endif
if (iopl(0) != 0)
return(errno);
return(0);
}
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