74 lines
2.5 KiB
Groff
74 lines
2.5 KiB
Groff
.\" $NetBSD: spdmem.4,v 1.4 2011/04/29 10:40:46 wiz Exp $
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.\"
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.\"Copyright (c) 2007 Nicolas Joly
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.\"Copyright (c) 2007 Paul Goyette
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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 AND CONTRIBUTORS
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.\"``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\"TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\"PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\"BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\"CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\"SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\"INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\"CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\"ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\"POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd August 10, 2007
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.Dt SPDMEM 4
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.Os
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.Sh NAME
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.Nm spdmem
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.Nd Generic Memory Module Serial Presence Detect
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.Sh SYNOPSIS
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.Cd "spdmem* at iic? addr 0x50"
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.Cd "spdmem* at iic? addr 0x51"
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.Cd "spdmem* at iic? addr 0x52"
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.Cd "spdmem* at iic? addr 0x53"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for generic memory module Serial Presence Detect.
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During kernel boot it displays module type, and where possible, the size and
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rated speed of the memory module.
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Additional information such as bank configuration and width is
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printed if the kernel is booted in verbose mode.
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.Pp
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The Serial Presence Detect data for each memory module is also made accessible
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to user mode via
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.Xr sysctl 8 .
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An entry for each
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.Nm
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device is created under the
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.Dv hw
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top-level MIB.
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.Sh SEE ALSO
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.Xr iic 4 ,
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.Xr intro 4
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.Sh HISTORY
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The
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.Nm
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driver first appeared in
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.Nx 5.0 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm
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driver was written by
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.An Nicolas Joly Aq njoly@pasteur.fr
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with additional work by
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.An Paul Goyette Aq paul@whooppee.com .
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