1.\" $NetBSD: amdtemp.4,v 1.12 2018/12/29 20:29:46 is Exp $ 2.\"- 3.\" Copyright (c) 2008 Christoph Egger 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD: src/share/man/man4/coretemp.4,v 1.4 2007/10/15 20:00:19 netchild Exp $ 28.\" 29.Dd January 28, 2018 30.Dt AMDTEMP 4 31.Os 32.Sh NAME 33.Nm amdtemp 34.Nd AMD CPU on-die digital thermal sensor 35.Sh SYNOPSIS 36.Cd "amdtemp* at amdnb_miscbus?" 37.Sh DESCRIPTION 38The 39.Nm 40driver provides support for the on-die digital thermal sensor present 41on AMD K8, AMD Barcelona, AMD Phenom, AMD Griffin, AMD Fusion, 42AMD Bobcat, and AMD Puma CPUs. 43.Pp 44These sensors were officially introduced in AMD K8 Revision F processors, 45and provide 0.5\(deC accuracy. 46Precision was improved in Revision G chips, 47which provide two more bits for 0.25\(deC steppings. 48Each core 49has two temperature sensors, and there are up to two cores per CPU socket. 50.Pp 51AMD Barcelona, AMD Phenom, AMD Griffin, AMD Fusion, 52AMD Bobcat, and AMD Puma provide 0.125\(degC 53accuracy and provide one temperature sensor for each CPU socket. 54.Pp 55The 56.Nm 57driver reports temperatures through the 58.Xr envsys 4 59API. 60.Bl -column "CPUN sensor0" "Units" "Typical Use" -offset indent 61.It Sy "Sensor" Ta Sy "Units" Ta Sy "Typical Use" 62.It CPU Ns Em N No sensor0 Ta \(*mK Ta cpu Ns Em N No temperature 63.El 64.Sh SEE ALSO 65.Xr envsys 4 , 66.Xr envstat 8 , 67.Xr powerd 8 68.Sh HISTORY 69The 70.Nm 71driver first appeared in 72.Ox 4.4 73named 74.Dq kate . 75It was then ported to 76.Nx 5.0 . 77The driver has been renamed with support for newer AMD CPUs. 78.Sh AUTHORS 79.An -nosplit 80The 81.Nm 82driver was written by 83.An Constantine A. Murenin Aq Mt cnst@openbsd.org 84whilst at the University of Waterloo. 85It was adapted to 86.Nx 87by 88.An Christoph Egger . 89