/* Copyright (C) 1999-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

     Contributed by David Mosberger-Tang <davidm@hpl.hp.com>

   The GNU C Library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Lesser General Public

   License as published by the Free Software Foundation; either

   version 2.1 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

   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public

   License along with the GNU C Library; if not, see

   <http://www.gnu.org/licenses/>.  */

#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.

   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 (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 (int __level);

extern unsigned int _inb (unsigned long int __port);

extern unsigned int _inb (unsigned long int __port);

extern unsigned int _inw (unsigned long int __port);

extern unsigned int _inl (unsigned long int __port);

extern void _outb (unsigned char __val, unsigned long int __port);

extern void _outw (unsigned short __val, unsigned long int __port);

extern void _outl (unsigned int __val, unsigned long int __port);

#define inb	_inb

#define inw	_inw

#define inl	_inl

#define outb	_outb

#define outw	_outw

#define outl	_outl

/* Access PCI space protected from machine checks.  */

extern int pciconfig_read (unsigned long int __bus, unsigned long int __dfn,

			   unsigned long int __off, unsigned long int __len,

			   unsigned char *__buf);

extern int pciconfig_write (unsigned long int __bus, unsigned long int __dfn,

			    unsigned long int __off, unsigned long int __len,

			    unsigned char *__buf);

__END_DECLS

#endif /* _SYS_IO_H */