1 /* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
27 /* If TURN_ON is TRUE, request for permission to do direct i/o on the
28 port numbers in the range [FROM,FROM+NUM-1]. Otherwise, turn I/O
29 permission off for that range. This call requires root privileges.
31 Portability note: not all Linux platforms support this call. Most
32 platforms based on the PC I/O architecture probably will, however.
33 E.g., Linux/Alpha for Alpha PCs supports this. */
34 extern int ioperm (unsigned long int __from
, unsigned long int __num
,
37 /* Set the I/O privilege level to LEVEL. If LEVEL>3, permission to
38 access any I/O port is granted. This call requires root
40 extern int iopl (int __level
);
42 extern unsigned int _inb (unsigned long int __port
);
43 extern unsigned int _inb (unsigned long int __port
);
44 extern unsigned int _inw (unsigned long int __port
);
45 extern unsigned int _inl (unsigned long int __port
);
46 extern void _outb (unsigned char __val
, unsigned long int __port
);
47 extern void _outw (unsigned short __val
, unsigned long int __port
);
48 extern void _outl (unsigned int __val
, unsigned long int __port
);
57 /* Access PCI space protected from machine checks. */
58 extern int pciconfig_read (unsigned long int __bus
, unsigned long int __dfn
,
59 unsigned long int __off
, unsigned long int __len
,
60 unsigned char *__buf
);
62 extern int pciconfig_write (unsigned long int __bus
, unsigned long int __dfn
,
63 unsigned long int __off
, unsigned long int __len
,
64 unsigned char *__buf
);
68 #endif /* _SYS_IO_H */