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author | bms <bms@FreeBSD.org> | 2003-09-25 19:14:40 +0000 |
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committer | bms <bms@FreeBSD.org> | 2003-09-25 19:14:40 +0000 |
commit | b73973612aa7e3a7e398aba62ebad855c0367d3d (patch) | |
tree | e01b4279d0379d99a4b87d84fb66a6d2b44e7b06 /share/man/man9/pmap_is_modified.9 | |
parent | a3c2b54eb89b24e55e83341d4783f0baaabf6d97 (diff) | |
download | FreeBSD-src-b73973612aa7e3a7e398aba62ebad855c0367d3d.zip FreeBSD-src-b73973612aa7e3a7e398aba62ebad855c0367d3d.tar.gz |
Add manual page documentation for the machine-independent PMAP subsystem.
Include documentation of alc's new pmap_extract_and_hold() function.
Reviewed by: hmp
Approved by: jake (mentor)
Diffstat (limited to 'share/man/man9/pmap_is_modified.9')
-rw-r--r-- | share/man/man9/pmap_is_modified.9 | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/share/man/man9/pmap_is_modified.9 b/share/man/man9/pmap_is_modified.9 new file mode 100644 index 0000000..e58256f --- /dev/null +++ b/share/man/man9/pmap_is_modified.9 @@ -0,0 +1,70 @@ +.\" +.\" Copyright (c) 2003 Bruce M Simpson <bms@spc.org> +.\" All rights reserved. +.\" +.\" Redistribution and use in source and binary forms, with or without +.\" modification, are permitted provided that the following conditions +.\" are met: +.\" 1. Redistributions of source code must retain the above copyright +.\" notice, this list of conditions and the following disclaimer. +.\" 2. Redistributions in binary form must reproduce the above copyright +.\" notice, this list of conditions and the following disclaimer in the +.\" documentation and/or other materials provided with the distribution. +.\" +.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +.\" SUCH DAMAGE. +.\" +.\" $FreeBSD$ +.\" +.Dd July 21, 2003 +.Dt PMAP_IS_MODIFIED 9 +.Sh NAME +.Nm pmap_is_modified , +.Nm pmap_ts_modified +.Nd return information about physical pages +.Sh SYNOPSIS +.In sys/param.h +.In vm/vm.h +.In vm/pmap.h +.Ft boolean_t +.Fn pmap_is_modified "vm_page_t m" +.Ft int +.Fn pmap_ts_referenced "vm_page_t m" +.Sh DESCRIPTION +The +.Fn pmap_is_modified +and +.Fn pmap_ts_referenced +functions return information about physical pages. +.Sh RETURN VALUES +The +.Fn pmap_is_modified +function returns the status of the +.Sq "page modified" +bit for the physical page +.Fa m . +.Pp +The +.Fn pmap_ts_referenced +function returns a count of reference bits for a page +.Fa m , +clearing those bits. +It is not necessary for every reference bit to be cleared, but it is +necessary that 0 only be returned when there are no remaining reference +bits set on the page. +.Sh SEE ALSO +.Xr pmap 9 , +.Xr pmap_clear_modify 9 , +.Xr pmap_clear_reference 9 +.Sh AUTHORS +This manual page was written by +.An Bruce M Simpson Aq bms@spc.org . |