47 lines
1.7 KiB
C
47 lines
1.7 KiB
C
/* Copyright (C) 1996 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef _SYS_IO_H
|
|
|
|
#define _SYS_IO_H 1
|
|
#include <features.h>
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/* Get constants from kernel header files. */
|
|
#include <asm/io.h>
|
|
|
|
/* If TURN_ON is TRUE, request for permission to do direct i/o on the
|
|
port numbers in the range [FROM,FROM+NUM-1]. Otherwise, turn I/O
|
|
permission off for that range. This call requires root privileges.
|
|
|
|
Portability note: not all Linux platforms support this call. Most
|
|
platforms based on the PC I/O architecture probably will, however.
|
|
E.g., Linux/Alpha for Alpha PCs supports this. */
|
|
extern int ioperm __P ((unsigned long int __from, unsigned long int __num,
|
|
int __turn_on));
|
|
|
|
/* Set the I/O privilege level to LEVEL. If LEVEL>3, permission to
|
|
access any I/O port is granted. This call requires root
|
|
privileges. */
|
|
extern int iopl __P ((int __level));
|
|
|
|
__END_DECLS
|
|
|
|
#endif /* _SYS_IO_H */
|