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 February 14, 2018 29.Dt PMAP_QENTER 9 30.Os 31.Sh NAME 32.Nm pmap_qenter , 33.Nm pmap_qremove 34.Nd manage temporary kernel space mappings 35.Sh SYNOPSIS 36.In sys/param.h 37.In vm/vm.h 38.In vm/pmap.h 39.Ft void 40.Fn pmap_qenter "vm_offset_t sva" "vm_page_t *m" "int count" 41.Ft void 42.Fn pmap_qremove "vm_offset_t sva" "int count" 43.Sh DESCRIPTION 44The 45.Fn pmap_qenter 46function accepts a linear array of 47.Fa count 48pointers to wired pages 49.Fa *m , 50and enters each of these pages into the kernel virtual address (KVA) space, 51beginning at the address 52.Fa sva . 53The pages are mapped non-executable. 54.Pp 55The 56.Fn pmap_qremove 57function tears out a mapping from the kernel virtual address space, 58beginning at 59.Fa sva 60and for 61.Fa count 62pages. 63.Sh IMPLEMENTATION NOTES 64The 65.Fn pmap_qenter 66function is intended for temporary mappings that do not require page 67modification or reference counting. 68Old mappings are simply overwritten. 69The pages 70.Em must 71be wired into physical memory. 72.Pp 73The corresponding 74.Fn pmap_qremove 75function is intended to remove such temporary mappings. 76.Sh SEE ALSO 77.Xr pmap 9 78.Sh AUTHORS 79This manual page was written by 80.An Bruce M Simpson Aq Mt bms@spc.org . 81