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AMDTEMP(4) NetBSD Kernel Interfaces Manual AMDTEMP(4)
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amdtemp -- AMD CPU on-die digital thermal sensor
amdtemp* at amdnb_miscbus?
The amdtemp driver provides support for the on-die digital thermal sensor
present on AMD K8, AMD Barcelona, AMD Phenom, AMD Griffin, and AMD Fusion
These sensors were officially introduced in AMD K8 Revision F processors,
and provide 0.5 degC accuracy. Precision was improved in Revision G
chips, which provide two more bits for 0.25 degC steppings. Each core
has two temperature sensors, and there are up to two cores per CPU
AMD Barcelona, AMD Phenom, AMD Griffin, and AMD Fusion provide 0.125 degC
accuracy and provide one temperature sensor for each CPU socket.
The amdtemp driver reports temperatures through the envsys(4) API.
Sensor Units Typical Use
CPUN sensor0 uK cpuN temperature
envsys(4), envstat(8), powerd(8)
The amdtemp driver first appeared in OpenBSD 4.4 named ``kate''. It was
then ported to NetBSD 5.0. The driver has been renamed with support for
newer AMD CPUs.
The amdtemp driver was written by Constantine A. Murenin
<email@example.com> whilst at the University of Waterloo. It was adapted
to NetBSD by Christoph Egger.
NetBSD 8.0 January 28, 2018 NetBSD 8.0