74 lines
2.4 KiB
Groff
74 lines
2.4 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_OBJECT_INIT_PT 9
|
|
.Os
|
|
.Sh NAME
|
|
.Nm pmap_object_init_pt
|
|
.Nd initialize page tables for a VM object
|
|
.Sh SYNOPSIS
|
|
.In sys/param.h
|
|
.In vm/vm.h
|
|
.In vm/pmap.h
|
|
.Ft void
|
|
.Fo pmap_object_init_pt
|
|
.Fa "pmap_t pmap" "vm_offset_t addr" "vm_object_t object"
|
|
.Fa "vm_pindex_t pindex" "vm_size_t size" "int limit"
|
|
.Fc
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn pmap_object_init_pt
|
|
function preloads the page table entries into the specified physical map
|
|
.Fa pmap ,
|
|
for the given
|
|
.Fa object
|
|
at the virtual address
|
|
.Fa addr ,
|
|
for
|
|
.Fa size
|
|
bytes, beginning at the page index
|
|
.Fa pindex
|
|
within the object.
|
|
The map bits
|
|
.Fa limit
|
|
are heeded when creating the mapping.
|
|
.Sh IMPLEMENTATION NOTES
|
|
This function is not strictly required by an architecture's
|
|
.Xr pmap 9
|
|
implementation, but it does provide performance benefits if implemented.
|
|
.Pp
|
|
It is intended to eliminate the blast of soft faults on process
|
|
startup, and immediately following a call to
|
|
.Xr mmap 2 .
|
|
.Sh SEE ALSO
|
|
.Xr pmap 9 ,
|
|
.Xr vm_map 9
|
|
.Sh AUTHORS
|
|
This manual page was written by
|
|
.An Bruce M Simpson Aq bms@spc.org .
|