1 .\" $NetBSD: spdmem.4,v 1.2 2008/09/17 12:37:41 pgoyette Exp $
3 .\"Copyright (c) 2007 Nicolas Joly
4 .\"Copyright (c) 2007 Paul Goyette
5 .\"All rights reserved.
7 .\"Redistribution and use in source and binary forms, with or without
8 .\"modification, are permitted provided that the following conditions
10 .\"1. Redistributions of source code must retain the above copyright
11 .\" notice, this list of conditions and the following disclaimer.
12 .\"2. Redistributions in binary form must reproduce the above copyright
13 .\" notice, this list of conditions and the following disclaimer in the
14 .\" documentation and/or other materials provided with the distribution.
15 .\"3. The name of the author may not be used to endorse or promote products
16 .\" derived from this software without specific prior written permission.
18 .\"THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
19 .\"``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
20 .\"TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21 .\"PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
22 .\"BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 .\"CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 .\"SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25 .\"INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26 .\"CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27 .\"ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28 .\"POSSIBILITY OF SUCH DAMAGE.
35 .Nd Generic Memory Module Serial Presence Detect
37 .Cd "spdmem* at iic? addr 0x50"
38 .Cd "spdmem* at iic? addr 0x51"
39 .Cd "spdmem* at iic? addr 0x52"
40 .Cd "spdmem* at iic? addr 0x53"
44 driver provides support for generic memory module Serial Presence Detect.
45 During kernel boot it displays module type, and where possible, the size and
46 rated speed of the memory module. Additional information such as bank
47 configuration and width is printed if the kernel is booted in verbose mode.
49 The Serial Presence Detect data for each memory module is also made accessible
50 to user mode via sysctl(8). An entry for each
52 device is created under the 'hw' top-level MIB.
59 driver first appeared in
66 .An Nicolas Joly <njoly@pasteur.fr>
67 with additional work by
68 .An Paul Goyette <paul@whooppee.com> .