/* Copyright (C) 1996, 1998, 1999 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #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. */ extern int ioperm (unsigned long int __from, unsigned long int __num, int __turn_on) __THROW; libc_hidden_proto(ioperm) /* Set the I/O privilege level to LEVEL. If LEVEL is nonzero, permission to access any I/O port is granted. This call requires root privileges. */ extern int iopl (int __level) __THROW; /* The functions that actually perform reads and writes. */ extern unsigned char inb (unsigned long int port) __THROW; extern unsigned short int inw (unsigned long int port) __THROW; extern unsigned long int inl (unsigned long int port) __THROW; extern void outb (unsigned char value, unsigned long int port) __THROW; extern void outw (unsigned short value, unsigned long int port) __THROW; extern void outl (unsigned long value, unsigned long int port) __THROW; __END_DECLS #endif /* _SYS_IO_H */