ichwd(4)
NAME
ichwd - Intel ICH watchdog timer driver
SYNOPSIS
device ichwd
DESCRIPTION
- This driver provides access to the watchdog timer (WDT) pre
- sent on all
Intel ICH chipsets. - The ICH WDT counts down in ticks of approximately 0.6 sec
- onds; 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 at - tempts to detect
this condition and will refuse to attach if it believes the - WDT is disabled.
SEE ALSO
watchdog(4), watchdog(8), watchdogd(8), watchdog(9)
- Using the Intel ICH Family Watchdog Timer (WDT), Intel Ap
- plication Note
AP-725, Document Number 292273-001.
HISTORY
The ichwd driver appeared in FreeBSD 5.3.
AUTHORS
- The ichwd driver was written by Wm. Daryl Hawkins
- <dhawkins@tamu.edu> and
Dag-Erling Smorgrav <des@FreeBSD.org>. This manual page was - written by
Dag-Erling Smorgrav <des@FreeBSD.org>. - BSD May 11, 2004