libdha/sysdep/pci_mach386.c

   1 /*
   2    This file is based on:
   3    $XFree86: xc/programs/Xserver/hw/xfree86/etc/scanpci.c,v 3.34.2.17 1998/11/10 11:55:40 dawes Exp $
   4    Modified for readability by Nick Kurshev
   5 */
   6
   7 #include <errno.h>
   8
   9 static int io_fd;
  10
  11 static __inline__ int enable_os_io(void)
  12 {
  13     io_fd = -1 ;
  14     if ((io_fd = open("/dev/iopl", O_RDWR, 0)) < 0) {
  15         perror("/dev/iopl");
  16         return(errno);
  17     }
  18     return(0);
  19 }
  20
  21 static __inline__ int disable_os_io(void)
  22 {
  23     close(io_fd);
  24     return(0);
  25 }