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-.\"	$OpenBSD: mem.4,v 1.3 2007/05/31 19:19:54 jmc Exp $
-.\"
-.\" Copyright (c) 1991 The Regents of the University of California.
-.\" 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.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
-.\"
-.\"	from: @(#)mem.4	5.3 (Berkeley) 5/2/91
-.\"
-.Dd $Mdocdate: May 31 2007 $
-.Dt MEM 4 cats
-.Os
-.Sh NAME
-.Nm mem ,
-.Nm kmem
-.Nd memory files
-.Sh DESCRIPTION
-The special file
-.Pa /dev/mem
-is an interface to the physical memory of the computer.
-Byte offsets in this file are interpreted as physical memory addresses.
-Reading and writing this file is equivalent to reading and writing
-memory itself.
-Only offsets within the bounds of
-.Pa /dev/mem
-are allowed.
-.Pp
-Kernel virtual memory is accessed through the interface
-.Pa /dev/kmem
-in the same manner as
-.Pa /dev/mem .
-Only kernel virtual addresses that are currently mapped to memory are allowed.
-.Pp
-On cats, physical memory is contiguous.
-The kernel virtual memory begins at address
-.Li 0xf0000000 .
-.Pp
-Writeability of these devices is controlled by the system
-.Xr securelevel 7 .
-.Sh FILES
-.Bl -tag -width Pa -compact
-.It Pa /dev/mem
-.It Pa /dev/kmem
-.El
-.Sh SEE ALSO
-.Xr securelevel 7
-.Sh HISTORY
-The
-.Pa /dev/mem
-and
-.Pa /dev/kmem
-files appeared in
-.At v6 .