1.\" 2.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.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 July 21, 2003 29.Dt PMAP_IS_MODIFIED 9 30.Sh NAME 31.Nm pmap_is_modified , 32.Nm pmap_ts_modified 33.Nd return information about physical pages 34.Sh SYNOPSIS 35.In sys/param.h 36.In vm/vm.h 37.In vm/pmap.h 38.Ft boolean_t 39.Fn pmap_is_modified "vm_page_t m" 40.Ft int 41.Fn pmap_ts_referenced "vm_page_t m" 42.Sh DESCRIPTION 43The 44.Fn pmap_is_modified 45and 46.Fn pmap_ts_referenced 47functions return information about physical pages. 48.Sh RETURN VALUES 49The 50.Fn pmap_is_modified 51function returns the status of the 52.Sq "page modified" 53bit for the physical page 54.Fa m . 55.Pp 56The 57.Fn pmap_ts_referenced 58function returns a count of reference bits for a page 59.Fa m , 60clearing those bits. 61It is not necessary for every reference bit to be cleared, but it is 62necessary that 0 only be returned when there are no remaining reference 63bits set on the page. 64.Sh SEE ALSO 65.Xr pmap 9 , 66.Xr pmap_clear_modify 9 , 67.Xr pmap_clear_reference 9 68.Sh AUTHORS 69This manual page was written by 70.An Bruce M Simpson Aq bms@spc.org . 71