sysdeps/unix/sysv/linux/ia64/sys/io.h

   1 /* Copyright (C) 1999-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #ifndef _SYS_IO_H
  19 #define _SYS_IO_H       1
  20
  21 #include <features.h>
  22
  23 __BEGIN_DECLS
  24
  25 /* If TURN_ON is TRUE, request for permission to do direct i/o on the
  26    port numbers in the range [FROM,FROM+NUM-1].  Otherwise, turn I/O
  27    permission off for that range.  This call requires root privileges.
  28
  29    Portability note: not all Linux platforms support this call.  Most
  30    platforms based on the PC I/O architecture probably will, however.
  31    E.g., Linux/Alpha for Alpha PCs supports this.  */
  32 extern int ioperm (unsigned long int __from, unsigned long int __num,
  33                    int __turn_on);
  34
  35 /* Set the I/O privilege level to LEVEL.  If LEVEL>3, permission to
  36    access any I/O port is granted.  This call requires root
  37    privileges. */
  38 extern int iopl (int __level);
  39
  40 extern unsigned int _inb (unsigned long int __port);
  41 extern unsigned int _inb (unsigned long int __port);
  42 extern unsigned int _inw (unsigned long int __port);
  43 extern unsigned int _inl (unsigned long int __port);
  44 extern void _outb (unsigned char __val, unsigned long int __port);
  45 extern void _outw (unsigned short __val, unsigned long int __port);
  46 extern void _outl (unsigned int __val, unsigned long int __port);
  47
  48 #define inb     _inb
  49 #define inw     _inw
  50 #define inl     _inl
  51 #define outb    _outb
  52 #define outw    _outw
  53 #define outl    _outl
  54
  55 /* Access PCI space protected from machine checks.  */
  56 extern int pciconfig_read (unsigned long int __bus, unsigned long int __dfn,
  57                            unsigned long int __off, unsigned long int __len,
  58                            unsigned char *__buf);
  59
  60 extern int pciconfig_write (unsigned long int __bus, unsigned long int __dfn,
  61                             unsigned long int __off, unsigned long int __len,
  62                             unsigned char *__buf);
  63
  64 __END_DECLS
  65
  66 #endif /* _SYS_IO_H */