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+.\"
+.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD$
+.\"
+.Dd July 21, 2003
+.Dt PMAP_CHANGE_WIRING 9
+.Os
+.Sh NAME
+.Nm pmap_change_wiring
+.Nd change physical wiring for a map or virtual address pair
+.Sh SYNOPSIS
+.In sys/param.h
+.In vm/vm.h
+.In vm/pmap.h
+.Ft void
+.Fn pmap_change_wiring "pmap_t pmap" "vm_offset_t va" "boolean_t wired"
+.Sh DESCRIPTION
+The
+.Fn pmap_change_wiring
+function changes the wiring attribute for the page at virtual address
+.Fa va
+in the physical map
+.Fa pmap .
+A wired page gets its name from being
+.Dq wired
+into the system page tables so that it will not be paged out.
+.Pp
+The mapping must already exist in the
+.Fa pmap .
+If
+.Fa wired
+is
+.Dv TRUE ,
+the map's wired page count will be incremented; if
+.Dv FALSE ,
+it will be decremented.
+.Pp
+It is typically called by the
+.Fn vm_fault_unwire
+function.
+.Sh SEE ALSO
+.Xr pmap 9
+.Sh AUTHORS
+This manual page was written by
+.An Bruce M Simpson Aq Mt bms@spc.org .