/* Copyright (C) 1996, 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. 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) __THROW; /* 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) __THROW; /* Return the physical address of the DENSE I/O memory or NULL if none is available (e.g. on a jensen). */ extern unsigned long int _bus_base (void) __THROW __attribute__ ((const)); extern unsigned long int bus_base (void) __THROW __attribute__ ((const)); /* Return the physical address of the SPARSE I/O memory. */ extern unsigned long _bus_base_sparse (void) __THROW __attribute__ ((const)); extern unsigned long bus_base_sparse (void) __THROW __attribute__ ((const)); /* Return the HAE shift used by the SPARSE I/O memory. */ extern int _hae_shift (void) __THROW __attribute__ ((const)); extern int hae_shift (void) __THROW __attribute__ ((const)); /* Previous three are deprecated in favour of the following, which knows about multiple PCI "hoses". Provide the PCI bus and dfn numbers just as to pciconfig_read/write. */ enum __pciconfig_iobase_which { IOBASE_HOSE = 0, /* Return hose index. */ IOBASE_SPARSE_MEM = 1, /* Return physical memory addresses. */ IOBASE_DENSE_MEM = 2, IOBASE_SPARSE_IO = 3, IOBASE_DENSE_IO = 4 }; extern long pciconfig_iobase(enum __pciconfig_iobase_which __which, unsigned long int __bus, unsigned long int __dfn) __THROW __attribute__ ((const)); /* 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) __THROW; extern int pciconfig_write (unsigned long int __bus, unsigned long int __dfn, unsigned long int __off, unsigned long int __len, unsigned char *__buf) __THROW; /* Userspace declarations. */ extern unsigned int inb (unsigned long __port) __THROW; extern unsigned int inw (unsigned long __port) __THROW; extern unsigned int inl (unsigned long __port) __THROW; extern void outb (unsigned char __b, unsigned long __port) __THROW; extern void outw (unsigned short __w, unsigned long __port) __THROW; extern void outl (unsigned int __l, unsigned long __port) __THROW; __END_DECLS #endif /* _SYS_IO_H */