sysdeps/unix/sysv/linux/ia64/sys/io.h

   1 /* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3      Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _SYS_IO_H
  21 #define _SYS_IO_H       1
  22
  23 #include <features.h>
  24
  25 __BEGIN_DECLS
  26
  27 /* If TURN_ON is TRUE, request for permission to do direct i/o on the
  28    port numbers in the range [FROM,FROM+NUM-1].  Otherwise, turn I/O
  29    permission off for that range.  This call requires root privileges.
  30
  31    Portability note: not all Linux platforms support this call.  Most
  32    platforms based on the PC I/O architecture probably will, however.
  33    E.g., Linux/Alpha for Alpha PCs supports this.  */
  34 extern int ioperm (unsigned long int __from, unsigned long int __num,
  35                    int __turn_on);
  36
  37 /* Set the I/O privilege level to LEVEL.  If LEVEL>3, permission to
  38    access any I/O port is granted.  This call requires root
  39    privileges. */
  40 extern int iopl (int __level);
  41
  42 extern unsigned int _inb (unsigned long int __port);
  43 extern unsigned int _inb (unsigned long int __port);
  44 extern unsigned int _inw (unsigned long int __port);
  45 extern unsigned int _inl (unsigned long int __port);
  46 extern void _outb (unsigned char __val, unsigned long int __port);
  47 extern void _outw (unsigned short __val, unsigned long int __port);
  48 extern void _outl (unsigned int __val, unsigned long int __port);
  49
  50 #define inb     _inb
  51 #define inw     _inw
  52 #define inl     _inl
  53 #define outb    _outb
  54 #define outw    _outw
  55 #define outl    _outl
  56
  57 /* Access PCI space protected from machine checks.  */
  58 extern int pciconfig_read (unsigned long int __bus, unsigned long int __dfn,
  59                            unsigned long int __off, unsigned long int __len,
  60                            unsigned char *__buf);
  61
  62 extern int pciconfig_write (unsigned long int __bus, unsigned long int __dfn,
  63                             unsigned long int __off, unsigned long int __len,
  64                             unsigned char *__buf);
  65
  66 __END_DECLS
  67
  68 #endif /* _SYS_IO_H */