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/* Copyright (C) 1999-2023 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 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
<https://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 */
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