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/share/man/man9/pmap_zero_page.9

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 1.\"
 2.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org>
 3.\" All rights reserved.
 4.\"
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26.\" $FreeBSD$
27.\"
28.Dd July 21, 2003
29.Dt PMAP_ZERO 9
30.Os
31.Sh NAME
32.Nm pmap_zero_page ,
33.Nm pmap_zero_area ,
34.Nm pmap_zero_idle
35.Nd zero-fill a page using machine-dependent optimizations
36.Sh SYNOPSIS
37.In sys/param.h
38.In vm/vm.h
39.In vm/pmap.h
40.Ft void
41.Fn pmap_zero_page "vm_page_t m"
42.Ft void
43.Fn pmap_zero_page_area "vm_page_t m" "int off" "int size"
44.Ft void
45.Fn pmap_zero_page_idle "vm_page_t m"
46.Sh DESCRIPTION
47The
48.Fn pmap_zero_page
49function zero-fills an entire page using machine-dependent optimizations.
50The
51.Fn pmap_zero_page_area
52function is used to zero-fill an area of a page.
53The range specified must not cross a page boundary; it must be contained
54entirely within a single page.
55.Pp
56The
57.Fn pmap_zero_page_idle
58interface is used by the
59.Nm vm_pagezero
60process.
61The system-wide
62.Va Giant
63lock should not be required to be held in order to call this interface.
64.Sh IMPLEMENTATION NOTES
65This function is required to be implemented for each architecture supported by
66.Fx .
67.Sh SEE ALSO
68.Xr bzero 3 ,
69.Xr pmap 9
70.Sh AUTHORS
71This manual page was written by
72.An Bruce M Simpson Aq bms@spc.org .