Add and activate the man page for memcontrol(8).

Reviewed by:	msmith

usr.sbin/memcontrol/Makefile

@@ -1,4 +1,6 @@
+# $FreeBSD$
+
 PROG=		memcontrol
-NOMAN=		yes
+MAN8=		memcontrol.8
 
 .include <bsd.prog.mk>

usr.sbin/memcontrol/memcontrol.8

@@ -0,0 +1,113 @@
+.\" Copyright (c) 1999 Chris Costello
+.\" 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 September 28, 1999
+.Dt MEMCONTROL 8
+.Os FreeBSD
+.Sh NAME
+.Nm memcontrol
+.Nd "Control system cache behaviour with respect to memory"
+.Sh SYNOPSIS
+.Nm
+.Ar list
+.Op Fl a
+.Pp
+.Nm
+.Ar set
+.Fl b Ar base
+.Fl l Ar length
+.Fl o Ar owner
+.Ar attribute
+.Pp
+.Nm
+.Ar clear
+.Fl o Ar owner
+.Pp
+.Nm
+.Ar clear
+.Fl b Ar base
+.Fl l Ar length
+.Sh DESCRIPTION
+A number of supported system architectures allow the behaviour of the CPU
+cache to be programmed to behave differently depending on the region being
+written.
+.Pp
+.Nm Memcontrol
+provides an interface to this facility, allowing CPU cache behavior to
+be altered for ranges of system physical memory.
+.Pp
+These ranges are typically power-of-2 aligned and sized, however the specific
+rules governing their layout vary between architectures.  The
+.Nm memcontrol
+program does not attempt to enforce these rules, however the system will
+reject any attempt to set an illegal combination.
+.Bl -tag -width clear
+.It Ar list
+List range slots.
+.Bl -tag -width xxxxxx
+.It Op Fl a
+List all range slots, even those that are inactive
+.El
+.It Ar set
+Set memory range attributes.
+.Bl -tag -width xxxxxx
+.It Fl b Ar base
+Memory range base address
+.It Fl l Ar length
+Length of memory range in bytes, power of 2
+.It Fl o Ar owner
+Text identifier for this setting (7 char max)
+.It Ar attribute
+Attributes applied to this range; one of
+.Ar uncacheable ,
+.Ar write-combine ,
+.Ar write-through ,
+.Ar write-back ,
+.Ar write-protect
+.El
+.It Ar clear
+Clear memory range attributes. Ranges may be cleared by owner or by
+base/length combination.
+.Pp
+To clear based on ownership:
+.Bl -tag -width xxxxxx
+.It Fl o Ar owner
+All ranges with this owner will be cleared
+.El
+.Pp
+To clear based on the base/length combination:
+.Bl -tag -width xxxxxx
+.It Fl b Ar base
+Memory range base address
+.It Fl l Ar length
+Length of memory range in bytes, power of 2
+.El
+.Pp
+Base and length must exactly match an existing range.
+.El
+.Sh SEE ALSO
+.Xr ioctl 2 ,
+.Xr mem 4