59 lines
2.2 KiB
Groff
59 lines
2.2 KiB
Groff
.\" $NetBSD: cpu.4,v 1.1 2002/03/24 22:29:56 bjh21 Exp $
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.\"
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.\" Copyright (c) 2000 Ben Harris.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd December 11, 2000
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.Os
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.Dt CPU 4 acorn26
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.Sh NAME
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.Nm cpu
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.Nd Device driver for CPU-specific features
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.Sh SYNOPSIS
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.Cd cpu0 at root flags 0
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.Cd options CPU_ARM2
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.Cd options CPU_ARM250
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.Cd options CPU_ARM3
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.Sh DESCRIPTION
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The
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.Nm
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driver provides a convenient hook for identifying the system's CPU and setting
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various parameters relating to it.
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.Pp
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Setting the bottom bit of the flags will cause the cache on the ARM3 to be
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disabled, otherwise it's enabled.
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.Pp
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The following options are available relating to the
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.Nm
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driver:
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.Bl -ohang
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.It Cd options CPU_ARM2
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Enables support for ARM2 CPUs.
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.It Cd options CPU_ARM250
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Enables support for ARM2as CPUs (as found in the ARM250).
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.It Cd options CPU_ARM3
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Enables support for ARM3 CPUs.
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.El
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