libdha/sysdep/pci_bsdi.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 #include <errno.h>
   7 #include <sys/file.h>
   8 #include <sys/ioctl.h>
   9 #include <i386/isa/pcconsioctl.h>
  10 #ifndef GCCUSESGAS
  11 #define GCCUSESGAS
  12 #endif
  13
  14 static int io_fd;
  15
  16 static __inline__ int enable_os_io(void)
  17 {
  18     io_fd = -1 ;
  19     if ((io_fd = open("/dev/console", O_RDWR, 0)) < 0) {
  20         perror("/dev/console");
  21         return(errno);
  22     }
  23     if (ioctl(io_fd, PCCONENABIOPL, 0) < 0) {
  24         perror("ioctl(PCCONENABIOPL)");
  25         return(errno);
  26     }
  27     return(0);
  28 }
  29
  30 static __inline__ int disable_os_io(void)
  31 {
  32     if (ioctl(io_fd, PCCONDISABIOPL, 0) < 0) {
  33         perror("ioctl(PCCONDISABIOPL)");
  34         close(io_fd);
  35         return(errno);
  36     }
  37     close(io_fd);
  38     return(0);
  39 }