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ichwd - Intel ICH watchdog timer driver
This driver provides access to the watchdog timer (WDT) present on all
Intel ICH chipsets.
The ICH WDT counts down in ticks of approximately 0.6 seconds; the exact
value depends on hardware quality and environmental factors. Supported
watchdog intervals range from 2 to 63 ticks.
Note that on some ICH-based systems, the WDT may be present but disabled,
either in hardware or by the BIOS. The ichwd driver attempts to detect
this condition and will refuse to attach if it believes the WDT is
watchdog(4), watchdog(8), watchdogd(8), watchdog(9)
Using the Intel ICH Family Watchdog Timer (WDT), Intel Application Note
AP-725, Document Number 292273-001.
The ichwd driver appeared in FreeBSD 5.3.
The ichwd driver was written by Wm. Daryl Hawkins 〈email@example.com〉 and
Dag-Erling Smørgrav 〈des@FreeBSD.org〉. This manual page was written by
Dag-Erling Smørgrav 〈des@FreeBSD.org〉.