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.Dd July 17, 2014 27.Dt PMAP_IS_MODIFIED 9 28.Os 29.Sh NAME 30.Nm pmap_is_modified , 31.Nm pmap_ts_modified 32.Nd return information about physical pages 33.Sh SYNOPSIS 34.In sys/param.h 35.In vm/vm.h 36.In vm/pmap.h 37.Ft bool 38.Fn pmap_is_modified "vm_page_t m" 39.Ft int 40.Fn pmap_ts_referenced "vm_page_t m" 41.Sh DESCRIPTION 42The 43.Fn pmap_is_modified 44and 45.Fn pmap_ts_referenced 46functions return information about physical pages. 47.Sh RETURN VALUES 48The 49.Fn pmap_is_modified 50function returns the status of the 51.Dq "page modified" 52bit for the physical page 53.Fa m . 54.Pp 55The 56.Fn pmap_ts_referenced 57function returns a count of reference bits for a page 58.Fa m , 59clearing those bits. 60It is not necessary for every reference bit to be cleared, but it is 61necessary that 0 only be returned when there are no remaining reference 62bits set on the page. 63.Sh SEE ALSO 64.Xr pmap 9 , 65.Xr pmap_clear_modify 9 66.Sh AUTHORS 67This manual page was written by 68.An Bruce M Simpson Aq Mt bms@spc.org . 69