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/* Copyright (C) 1996, 1999 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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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) __THROW;
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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) __THROW;
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/* Return the physical address of the DENSE I/O memory or NULL if none
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is available (e.g. on a jensen). */
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extern unsigned long int _bus_base (void) __THROW __attribute__ ((const));
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extern unsigned long int bus_base (void) __THROW __attribute__ ((const));
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/* Return the physical address of the SPARSE I/O memory. */
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extern unsigned long _bus_base_sparse (void) __THROW __attribute__ ((const));
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extern unsigned long bus_base_sparse (void) __THROW __attribute__ ((const));
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/* Return the HAE shift used by the SPARSE I/O memory. */
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extern int _hae_shift (void) __THROW __attribute__ ((const));
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extern int hae_shift (void) __THROW __attribute__ ((const));
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/* Previous three are deprecated in favour of the following, which
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knows about multiple PCI "hoses". Provide the PCI bus and dfn
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numbers just as to pciconfig_read/write. */
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enum __pciconfig_iobase_which
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{
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IOBASE_HOSE = 0, /* Return hose index. */
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IOBASE_SPARSE_MEM = 1, /* Return physical memory addresses. */
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IOBASE_DENSE_MEM = 2,
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IOBASE_SPARSE_IO = 3,
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IOBASE_DENSE_IO = 4
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};
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extern long pciconfig_iobase(enum __pciconfig_iobase_which __which,
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unsigned long int __bus,
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unsigned long int __dfn)
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__THROW __attribute__ ((const));
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/* Access PCI space protected from machine checks. */
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extern int pciconfig_read (unsigned long int __bus,
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unsigned long int __dfn,
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unsigned long int __off,
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unsigned long int __len,
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unsigned char *__buf) __THROW;
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extern int pciconfig_write (unsigned long int __bus,
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unsigned long int __dfn,
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unsigned long int __off,
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unsigned long int __len,
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unsigned char *__buf) __THROW;
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/* Userspace declarations. */
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extern unsigned int inb (unsigned long __port) __THROW;
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extern unsigned int inw (unsigned long __port) __THROW;
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extern unsigned int inl (unsigned long __port) __THROW;
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extern void outb (unsigned char __b, unsigned long __port) __THROW;
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extern void outw (unsigned short __w, unsigned long __port) __THROW;
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extern void outl (unsigned int __l, unsigned long __port) __THROW;
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__END_DECLS
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#endif /* _SYS_IO_H */
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