1.\" $NetBSD: amdtemp.4,v 1.1 2008/04/22 22:37:13 cegger 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 April 22, 2008 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 pci? dev ? function ?" 37.Sh DESCRIPTION 38The 39.Nm 40driver provides support for the on-die digital thermal sensor present 41on AMD K8, AMD Barcelona, AMD Phenoms and AMD Griffin CPUs. 42.Pp 43These sensors were officially introduced in AMD K8 Revision F processors, 44and provide 0.5 degC accuracy. Precision was improved in Revision 45G chips, which provide two more bits for 0.25 degC steppings. Each core 46has two temperature sensors, and there are be up to two cores per CPU socket. 47.Pp 48AMD Barcelona, AMD Phenom and AMD Griffin provide 0.125 degC accuracy 49and provide one temperature sensor for each CPU socket. 50.Pp 51The 52.Nm 53driver reports temperatures through the 54.Xr envsys 4 55API. 56.Bl -column "Sensor " "Units" "Typical" -offset indent 57.It Sy "Sensor " Ta Sy "Units" Ta Sy "Typical Use" 58.It Li "CPUN sensor0" Ta "uK" Ta "cpuN temperature" 59.El 60.Sh SEE ALSO 61.Xr envstat 4 , 62.Xr powerd 8 63.Sh HISTORY 64The 65.Nm 66driver first appeared in 67.Ox 4.4 68named 69.Xr kate 4 . 70And then was ported to 71.Nx 5.0 . 72The driver has been renamed with support for newer AMD CPUs. 73.Sh AUTHORS 74.An -nosplit 75The 76.Nm 77driver was written by 78.An Constantine A. Murenin <cnst@openbsd.org> 79whilst at the University of Waterloo. It was adapted to 80.Nx 81by 82.An Christoph Egger . 83