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+<table class="head">
+ <tr>
+ <td class="head-ltitle">pchtherm(4)</td>
+ <td class="head-vol">Device Drivers Manual</td>
+ <td class="head-rtitle">pchtherm(4)</td>
+ </tr>
+</table>
+<div class="manual-text">
+<section class="Sh">
+<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
+<p class="Pp"><code class="Nm">pchtherm</code> &#x2014; <span class="Nd">Intel
+ PCH thermal subsystem</span></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
+<p class="Pp"><code class="Cd">device pci</code>
+ <br/>
+ <code class="Cd">device pchtherm</code></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
+<p class="Pp">The <code class="Nm">pchtherm</code> driver provides access to
+ sensor data and configuration installed in Intel PCH chipset.
+ <code class="Nm">pchtherm</code> configuration register.</p>
+<p class="Pp">The access to <code class="Nm">pchtherm</code> data is made via
+ the <a class="Xr">sysctl(8)</a> interface:</p>
+<div class="Bd Pp Li">
+<pre>dev.pchtherm.0.ctt: 115.0C
+dev.pchtherm.0.temperature: 28.5C
+dev.pchtherm.0.t2temp: 91.0C
+dev.pchtherm.0.t1temp: 86.0C
+dev.pchtherm.0.t0temp: 81.0C
+dev.pchtherm.0.tahv: 83.0C
+dev.pchtherm.0.talv: 30.0C
+dev.pchtherm.0.pmtime: 32
+dev.pchtherm.0.pmtemp: 50.0C
+dev.pchtherm.0.%parent: pci0
+dev.pchtherm.0.%pnpinfo: vendor=0x8086 device=0x9d31 subvendor=0x17aa subdevice=0x2256 class=0x118000
+dev.pchtherm.0.%location: slot=20 function=2 dbsf=pci0:0:20:2
+dev.pchtherm.0.%driver: pchtherm
+dev.pchtherm.0.%desc: Skylake PCH Thermal Subsystem
+dev.pchtherm.%parent:</pre>
+</div>
+<dl class="Bl-tag">
+ <dt id="dev.pchtherm._d.temperature"><var class="Va">dev.pchtherm.%d.temperature</var></dt>
+ <dd>Is the read-only value of the current temperature read by the sensor.</dd>
+ <dt id="dev.pchtherm._d.ctt"><var class="Va">dev.pchtherm.%d.ctt</var></dt>
+ <dd>When the system reaches this temperature, it will shut down. This will not
+ appear when this feature is disabled and locked down.</dd>
+ <dt id="dev.pchtherm._d.t0temp"><var class="Va">dev.pchtherm.%d.t0temp</var></dt>
+ <dd>When temperature is under this value, system will be in T0 state.</dd>
+ <dt id="dev.pchtherm._d.t1temp"><var class="Va">dev.pchtherm.%d.t1temp</var></dt>
+ <dd>When temperature is over <var class="Va">t0temp</var> and under this
+ value, system will be in T1 state.</dd>
+ <dt id="dev.pchtherm._d.t2temp"><var class="Va">dev.pchtherm.%d.t2temp</var></dt>
+ <dd>When temperature is over <var class="Va">t1temp</var> and under this
+ value, system will be in T2 state. Over this value, system will be in T3
+ state.</dd>
+ <dt id="dev.pchtherm._d.talv"><var class="Va">dev.pchtherm.%d.talv</var></dt>
+ <dd>Lower alart value. This will not appear when sensor enable bit is locked
+ down and the value is zero(which will show -50.0C).</dd>
+ <dt id="dev.pchtherm._d.tahv"><var class="Va">dev.pchtherm.%d.tahv</var></dt>
+ <dd>High alart value. This will not appear when sensor enable bit is locked
+ down and the value is zero(which will show -50.0C).</dd>
+ <dt id="dev.pchtherm._d.pmtemp"><var class="Va">dev.pchtherm.%d.pmtemp</var></dt>
+ <dd>Sensor Power management temperature. Under this temperature, sensor will
+ idle during <var class="Va">pmtime</var> second.</dd>
+ <dt id="dev.pchtherm._d.pmtime"><var class="Va">dev.pchtherm.%d.pmtime</var></dt>
+ <dd>Sensor idle duration when low temperature.</dd>
+ <dt id="dev.pchtherm._d.pch_hot_level"><var class="Va">dev.pchtherm.%d.pch_hot_level</var></dt>
+ <dd>When temperature is higher than this value, PCHHOT# pin will assert. This
+ value is not appear when this feature is disabled and locked down.</dd>
+</dl>
+<p class="Pp">Please check the PCH datasheets for more details.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="CAVEATS"><a class="permalink" href="#CAVEATS">CAVEATS</a></h1>
+<p class="Pp">All values are read-only. And it do not support event interrupt
+ for now.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
+ ALSO</a></h1>
+<p class="Pp"><a class="Xr">sysctl(8)</a></p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
+<p class="Pp">The <code class="Nm">pchtherm</code> driver first appeared in
+ <span class="Ux">FreeBSD 13.0</span>.</p>
+</section>
+<section class="Sh">
+<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
+<p class="Pp">The <code class="Nm">pchtherm</code> driver and this manual page
+ were written by <span class="An">Takanori Watanabe</span>
+ &lt;<a class="Mt" href="mailto:takawata@FreeBSD.org">takawata@FreeBSD.org</a>&gt;.</p>
+</section>
+</div>
+<table class="foot">
+ <tr>
+ <td class="foot-date">March 15, 2020</td>
+ <td class="foot-os">FreeBSD 15.0</td>
+ </tr>
+</table>