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.Os 31.Sh NAME 32.Nm pmap_is_modified , 33.Nm pmap_ts_modified 34.Nd return information about physical pages 35.Sh SYNOPSIS 36.In sys/param.h 37.In vm/vm.h 38.In vm/pmap.h 39.Ft boolean_t 40.Fn pmap_is_modified "vm_page_t m" 41.Ft int 42.Fn pmap_ts_referenced "vm_page_t m" 43.Sh DESCRIPTION 44The 45.Fn pmap_is_modified 46and 47.Fn pmap_ts_referenced 48functions return information about physical pages. 49.Sh RETURN VALUES 50The 51.Fn pmap_is_modified 52function returns the status of the 53.Dq "page modified" 54bit for the physical page 55.Fa m . 56.Pp 57The 58.Fn pmap_ts_referenced 59function returns a count of reference bits for a page 60.Fa m , 61clearing those bits. 62It is not necessary for every reference bit to be cleared, but it is 63necessary that 0 only be returned when there are no remaining reference 64bits set on the page. 65.Sh SEE ALSO 66.Xr pmap 9 , 67.Xr pmap_clear_modify 9 , 68.Xr pmap_clear_reference 9 69.Sh AUTHORS 70This manual page was written by 71.An Bruce M Simpson Aq bms@spc.org . 72