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.\" Copyright 2019, Joyent, Inc.
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.Dd November 16, 2019
.Dt AMDF17NBDF 7D
.Os
.Sh NAME
.Nm amdf17nbdf
.Nd AMD Family 17h Northbridge and Data Fabric Driver
.Sh SYNOPSIS
.Pa /dev/sensors/temperature/cpu/*
.Sh DESCRIPTION
The
.Nm
driver provides the system access to the Northbridge and Data Fabric
devices on AMD Family 17h
.Pq Zen, Zen+, and Zen 2
processors allowing the operating system to communicate with the system
management unit
.Pq SMU .
.Pp
From this, the driver exposes temperature sensors.
On Family 17h systems, temperature sensors exist for each Zeppelin die,
of which there may be multiple in a single package.
This means that each sensor covers more than one core.
.Pp
Temperature information is available to the system via the fault
management architecture
.Pq FMA .
The file system location and programming interface to the
.Nm
driver are considered
.Sy Volatile ,
subject to change without notice, and should not be used directly.
Raw temperature information can be dumped through the FMA developer
utility fmtopo.
.Sh SEE ALSO
.Xr fmadm 1M
.Rs
.%A AMD
.%B Open-Source Register Reference For AMD Family 17h Processors Models 00h-2Fh
.%D July, 2018
.Re