amdtemp(4) - NetBSD Manual Pages

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AMDTEMP(4)              NetBSD Kernel Interfaces Manual             AMDTEMP(4)


NAME
amdtemp -- AMD CPU on-die digital thermal sensor
SYNOPSIS
amdtemp* at amdnb_miscbus?
DESCRIPTION
The amdtemp driver provides support for the on-die digital thermal sensor present on AMD K8, AMD Barcelona, AMD Phenom, AMD Griffin, AMD Fusion, AMD Bobcat, and AMD Puma CPUs. These sensors were officially introduced in AMD K8 Revision F processors, and provide 0.5C accuracy. Precision was improved in Revision G chips, which provide two more bits for 0.25C steppings. Each core has two tem- perature sensors, and there are up to two cores per CPU socket. AMD Barcelona, AMD Phenom, AMD Griffin, AMD Fusion, AMD Bobcat, and AMD Puma provide 0.125gC 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 K cpuN temperature
SEE ALSO
envsys(4), envstat(8), powerd(8)
HISTORY
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.
AUTHORS
The amdtemp driver was written by Constantine A. Murenin <cnst@openbsd.org> whilst at the University of Waterloo. It was adapted to NetBSD by Christoph Egger. NetBSD 9.0 January 28, 2018 NetBSD 9.0
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