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68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
/* Copyright (C) 1999-2014 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _SYS_IO_H
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#define _SYS_IO_H 1
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#include <features.h>
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__BEGIN_DECLS
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/* If TURN_ON is TRUE, request for permission to do direct i/o on the
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port numbers in the range [FROM,FROM+NUM-1]. Otherwise, turn I/O
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permission off for that range. This call requires root privileges.
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Portability note: not all Linux platforms support this call. Most
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platforms based on the PC I/O architecture probably will, however.
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E.g., Linux/Alpha for Alpha PCs supports this. */
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extern int ioperm (unsigned long int __from, unsigned long int __num,
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int __turn_on);
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/* Set the I/O privilege level to LEVEL. If LEVEL>3, permission to
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access any I/O port is granted. This call requires root
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privileges. */
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extern int iopl (int __level);
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extern unsigned int _inb (unsigned long int __port);
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extern unsigned int _inb (unsigned long int __port);
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extern unsigned int _inw (unsigned long int __port);
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extern unsigned int _inl (unsigned long int __port);
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extern void _outb (unsigned char __val, unsigned long int __port);
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extern void _outw (unsigned short __val, unsigned long int __port);
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extern void _outl (unsigned int __val, unsigned long int __port);
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#define inb _inb
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#define inw _inw
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#define inl _inl
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#define outb _outb
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#define outw _outw
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#define outl _outl
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/* Access PCI space protected from machine checks. */
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extern int pciconfig_read (unsigned long int __bus, unsigned long int __dfn,
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unsigned long int __off, unsigned long int __len,
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unsigned char *__buf);
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extern int pciconfig_write (unsigned long int __bus, unsigned long int __dfn,
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unsigned long int __off, unsigned long int __len,
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unsigned char *__buf);
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__END_DECLS
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#endif /* _SYS_IO_H */
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