diff options
author | Dale Rahn <drahn@cvs.openbsd.org> | 2001-09-30 05:17:35 +0000 |
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committer | Dale Rahn <drahn@cvs.openbsd.org> | 2001-09-30 05:17:35 +0000 |
commit | 93f1dd41e975cfb72141eddb115328dafbc39f11 (patch) | |
tree | 6026564bc6b2ed30a1a0d436af2e6bc0a67fab80 /share | |
parent | 9282c7dbcfdf9ac66648d17cdc8c89d4cd7be4a0 (diff) |
Add one of the standard manpages, long missing on powerpc/macppc.
Copied from mac68k, with tweaks.
Diffstat (limited to 'share')
-rw-r--r-- | share/man/man4/man4.macppc/mem.4 | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/share/man/man4/man4.macppc/mem.4 b/share/man/man4/man4.macppc/mem.4 new file mode 100644 index 00000000000..fef7d9b4222 --- /dev/null +++ b/share/man/man4/man4.macppc/mem.4 @@ -0,0 +1,85 @@ +.\" Copyright (c) 1992, 1993 +.\" The Regents of the University of California. All rights reserved. +.\" +.\" This software was developed by the Computer Systems Engineering group +.\" at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and +.\" contributed to Berkeley. +.\" +.\" 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. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. 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 8.1 (Berkeley) 6/5/93 +.\" $OpenBSD: mem.4,v 1.1 2001/09/30 05:17:34 drahn Exp $ +.\" $NetBSD: mem.4,v 1.1 1997/06/08 17:40:57 ender Exp $ +.\" +.Dd Sep 30, 2001 +.Dt MEM 4 macppc +.Os +.Sh NAME +.Nm mem , +.Nm kmem +.Nd main memory +.Sh DESCRIPTION +The file +.Nm /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. +An error will be returned if an attempt is made to reference +an offset outside of +.Nm /dev/mem . +.Pp +Kernel virtual memory is accessed via the file +.Nm /dev/kmem +in the same manner as +.Nm /dev/mem . +Only kernel virtual addresses that are currently mapped to memory are allowed. +.Pp +On the +.Tn Macintosh , +physical memory may be discontiguous; +kernel virtual memory begins at +.Ad 0x00000000 . +.Pp +Writeability of these devices is controlled by the system +.Xr securelevel 7 . +.Sh FILES +.Bl -tag -width /dev/kmem -compact +.It Pa /dev/mem +.It Pa /dev/kmem +.El +.Sh SEE ALSO +.Xr securelevel 7 +.Sh HISTORY +The files +.Nm mem +and +.Nm kmem +appeared in +.At v6 . |