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Diffstat (limited to 'static/freebsd/man4/atrtc.4 4.html')
| -rw-r--r-- | static/freebsd/man4/atrtc.4 4.html | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/static/freebsd/man4/atrtc.4 4.html b/static/freebsd/man4/atrtc.4 4.html new file mode 100644 index 00000000..1488f8fb --- /dev/null +++ b/static/freebsd/man4/atrtc.4 4.html @@ -0,0 +1,52 @@ +<table class="head"> + <tr> + <td class="head-ltitle">ATRTC(4)</td> + <td class="head-vol">Device Drivers Manual</td> + <td class="head-rtitle">ATRTC(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">atrtc</code> — <span class="Nd">AT + Real-Time Clock (RTC) driver</span></p> +</section> +<section class="Sh"> +<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1> +<p class="Pp">This driver is a mandatory part of i386/amd64 kernels.</p> +<p class="Pp">The following tunables are settable from the + <a class="Xr">loader(8)</a>:</p> +<dl class="Bl-ohang"> + <dt id="hint.atrtc."><var class="Va">hint.atrtc.</var><var class="Ar">X</var><var class="Va">.clock</var></dt> + <dd>controls event timers functionality support. Setting to 0, disables it. + Default value is 1.</dd> + <dt id="hw.atrtc.enabled"><var class="Va">hw.atrtc.enabled</var></dt> + <dd>Forces enabling or disabling of the device(s). Setting to 0 disables it, + setting to 1 enables it, bypassing any platform configuration hints. + Default value is -1 (autodetect).</dd> +</dl> +</section> +<section class="Sh"> +<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1> +<p class="Pp">This driver uses RTC hardware to supply kernel with time-of-day + clock with 1 second resolution and one event timer. This hardware uses base + frequency of 32768Hz for advancing time-of-day clock and generating periodic + interrupts. Interrupts could be generated with fixed number of frequencies, + from 2Hz to 8192Hz, obtained by dividing base frequency by one of supported + power-of-2 divisors.</p> +<p class="Pp">Event timer provided by the driver is irrelevant to CPU power + states.</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">apic(4)</a>, <a class="Xr">attimer(4)</a>, + <a class="Xr">eventtimers(4)</a>, <a class="Xr">hpet(4)</a></p> +</section> +</div> +<table class="foot"> + <tr> + <td class="foot-date">December 15, 2022</td> + <td class="foot-os">FreeBSD 15.0</td> + </tr> +</table> |
