66 lines
2.2 KiB
Groff
66 lines
2.2 KiB
Groff
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.\"
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.\" Copyright (c) 2014 Alan L. Cox <alc@rice.edu>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd July 17, 2014
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.Dt PMAP_UNWIRE 9
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.Os
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.Sh NAME
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.Nm pmap_unwire
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.Nd unwire a range of virtual pages
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.Sh SYNOPSIS
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.In sys/param.h
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.In vm/vm.h
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.In vm/pmap.h
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.Ft void
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.Fo pmap_unwire
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.Fa "pmap_t pmap" "vm_offset_t start" "vm_offset_t end"
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.Fc
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.Sh DESCRIPTION
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The function
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.Fn pmap_unwire
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removes the wired attribute from each of the virtual-to-physical page mappings
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within the virtual address range from
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.Fa start
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to
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.Fa end
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of the physical map
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.Fa pmap .
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Every valid mapping within that range is required to have the wired attribute
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set.
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Invalid mappings are ignored, since they cannot have the wired attribute set.
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.Sh NOTES
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Only the function
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.Xr pmap_enter 9
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can be used to set the wired attribute of a virtual-to-physical page mapping.
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.Sh SEE ALSO
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.Xr pmap 9 ,
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.Xr pmap_enter 9 ,
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.Xr pmap_wired_count 9
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.Sh AUTHORS
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This manual page was written by
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.An Alan L. Cox Aq alc@rice.edu .
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