Unknown | 65 lines | 65 code | 0 blank | 0 comment | 0 complexity | 10d1629f8b13082a207859625ee58352 MD5 | raw file
1.\" 2.\" Copyright (c) 2003 Bruce M Simpson <firstname.lastname@example.org> 3.\" All rights reserved. 4.\" 5.\" Redistribution and use in source and binary forms, with or without 6.\" modification, are permitted provided that the following conditions 7.\" are met: 8.\" 1. Redistributions of source code must retain the above copyright 9.\" notice, this list of conditions and the following disclaimer. 10.\" 2. Redistributions in binary form must reproduce the above copyright 11.\" notice, this list of conditions and the following disclaimer in the 12.\" documentation and/or other materials provided with the distribution. 13.\" 14.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24.\" SUCH DAMAGE. 25.\" 26.\" $FreeBSD$ 27.\" 28.Dd June 10, 2005 29.Dt PMAP_INIT 9 30.Os 31.Sh NAME 32.Nm pmap_init , 33.Nm pmap_init2 34.Nd initialize the pmap subsystem 35.Sh SYNOPSIS 36.In sys/param.h 37.In vm/vm.h 38.In vm/pmap.h 39.Ft void 40.Fn pmap_init "void" 41.Ft void 42.Fn pmap_init2 "void" 43.Sh DESCRIPTION 44The 45.Fn pmap_init 46function initializes the 47.Xr pmap 9 48sub-system. 49It is called during system initialization by 50.Fn vm_init , 51to initialize any structures that the 52.Nm 53system needs in order to map between physical and virtual memory. 54.Pp 55The 56.Fn pmap_init2 57function initializes a zone for the PV entries. 58These are used to implement page sharing at the physical level. 59A high water mark is set so that the system can recover from 60excessive numbers of PV entries. 61.Sh SEE ALSO 62.Xr pmap 9 63.Sh AUTHORS 64This manual page was written by 65.An Bruce M Simpson Aq email@example.com .