72 lines
2.4 KiB
Groff
72 lines
2.4 KiB
Groff
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.\"
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.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
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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 21, 2003
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.Dt PMAP_ZERO 9
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.Sh NAME
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.Nm pmap_zero_page ,
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.Nm pmap_zero_area ,
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.Nm pmap_zero_idle
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.Nd zero-fill a page using machine-dependent optimizations
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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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.Fn pmap_zero_page "vm_page_t m"
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.Ft void
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.Fn pmap_zero_page_area "vm_page_t m" "int off" "int size"
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.Ft void
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.Fn pmap_zero_page_idle "vm_page_t m"
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.Sh DESCRIPTION
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The
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.Fn pmap_zero_page
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function zero-fills an entire page using machine-dependent optimizations.
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The
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.Fn pmap_zero_page_area
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function is used to zero-fill an area of a page.
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The range specified must not cross a page boundary; it must be contained
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entirely within a single page.
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.Pp
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The
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.Fn pmap_zero_page_idle
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interface is used by the
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.Em vm_pagezero
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process.
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The system-wide
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.Fa Giant
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lock should not be required to be held in order to call this interface.
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.Sh IMPLEMENTATION NOTES
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This function is required to be implemented for each architecture supported by
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.Fx .
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.Sh SEE ALSO
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.Xr bzero 3 ,
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.Xr pmap 9
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.Sh AUTHORS
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This manual page was written by
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.An Bruce M Simpson Aq bms@spc.org .
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