tco
—
Intel Controller Hub TCO watchdog timer device
The tco
driver provides support for the watchdog timer
included in the Intel Controller Hub (ICH).
Setting the timer interval and arming the watchdog is performed
using the wdogctl(8)
utility. For ICH5 and earlier controllers, the interval is in the range of 2
to 23 seconds; for ICH6 and newer controllers, the interval is in the range
of 1 to 367 seconds.
The tco
driver first appeared in NetBSD
8.0. In earlier releases of NetBSD the driver
was included as part of the
x86/ichlpcib(4) driver.