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+/* 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 */