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/* Copyright (C) 1996, 1998 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
/* 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. */
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 is nonzero,
permission to access any I/O port is granted. This call requires
root privileges. */
extern int iopl __P ((int __level));
/* The functions that actually perform reads and writes. */
#ifdef __i386__
/*
* For i386, glibc defines the in* and out* functions as static inlines
* in this header file. For a number of other archs, these appear to be
* external functions. Since uClibc shares this header amongst archs,
* stash the i386 stuff in bits/io_i386.h for now to cut down on clutter
* and still give expected behavior.
*/
#include <bits/io_i386.h>
#else
extern unsigned char inb (unsigned long port);
extern unsigned short inw (unsigned long port);
extern unsigned long inl (unsigned long port);
extern void outb (unsigned char value, unsigned long port);
extern void outw (unsigned short value, unsigned long port);
extern void outl (unsigned long value, unsigned long port);
#endif /* __i386__ */
__END_DECLS
#endif /* _SYS_IO_H */
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