mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-18 10:35:55 +00:00
80 lines
2.5 KiB
Groff
80 lines
2.5 KiB
Groff
.\"
|
|
.\" 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_QENTER 9
|
|
.Os
|
|
.Sh NAME
|
|
.Nm pmap_qenter ,
|
|
.Nm pmap_qremove
|
|
.Nd manage temporary kernel space mappings
|
|
.Sh SYNOPSIS
|
|
.In sys/param.h
|
|
.In vm/vm.h
|
|
.In vm/pmap.h
|
|
.Ft void
|
|
.Fn pmap_qenter "vm_offset_t sva" "vm_page_t *m" "int count"
|
|
.Ft void
|
|
.Fn pmap_qremove "vm_offset_t sva" "int count"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn pmap_qenter
|
|
function accepts a linear array of
|
|
.Fa count
|
|
pointers to wired pages
|
|
.Fa *m ,
|
|
and enters each of these pages into the kernel virtual address (KVA) space,
|
|
beginning at the address
|
|
.Fa sva .
|
|
.Pp
|
|
The
|
|
.Fn pmap_qremove
|
|
function tears out a mapping from the kernel virtual address space,
|
|
beginning at
|
|
.Fa sva
|
|
and for
|
|
.Fa count
|
|
pages.
|
|
.Sh IMPLEMENTATION NOTES
|
|
The
|
|
.Fn pmap_qenter
|
|
function is intended for temporary mappings that do not require page
|
|
modification or reference counting.
|
|
Old mappings are simply overwritten.
|
|
The pages
|
|
.Em must
|
|
be wired into physical memory.
|
|
.Pp
|
|
The corresponding
|
|
.Fn pmap_qremove
|
|
function is intended to remove such temporary mappings.
|
|
.Sh SEE ALSO
|
|
.Xr pmap 9
|
|
.Sh AUTHORS
|
|
This manual page was written by
|
|
.An Bruce M Simpson Aq bms@spc.org .
|