SPDMEM(4) FreeBSD Kernel Interfaces Manual SPDMEM(4)
NAME
spdmem - Generic Memory Module Serial Presence Detect
SYNOPSIS
spdmem* at iic? addr 0x50
spdmem* at iic? addr 0x51
spdmem* at iic? addr 0x52
spdmem* at iic? addr 0x53
spdmem* at iic? addr 0x54
spdmem* at iic? addr 0x55
spdmem* at iic? addr 0x56
spdmem* at iic? addr 0x57
DESCRIPTION
The spdmem driver provides support for generic memory module Serial
Presence Detect. During kernel boot it displays module type, and where
possible, the size and rated speed of the memory module. Additional
information such as bank configuration and width is printed if the kernel
is booted in verbose mode.
The Serial Presence Detect data for each memory module is also made
accessible to user mode via sysctl(8). An entry for each spdmem device
is created under the hw top-level MIB.
Some SPD ROMs also have a temperature sensor. It's supported by
sdtemp(4).
SEE ALSO
iic(4), intro(4), sdtemp(4)
HISTORY
The spdmem driver first appeared in NetBSD 5.0.
AUTHORS
The spdmem driver was written by Nicolas Joly <
[email protected]> with
additional work by Paul Goyette <
[email protected]>.
FreeBSD 14.1-RELEASE-p8 July 27, 2016 FreeBSD 14.1-RELEASE-p8