FreeBSD Manual Pages
ICHWD(4) Kernel Interfaces Manual ICHWD(4) NAME ichwd -- device driver for the Intel ICH watchdog interrupt timer SYNOPSIS To compile this driver into the kernel, place the following line in your kernel configuration file: device ichwd Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): ichwd_load="YES" DESCRIPTION The ichwd driver provides watchdog(4) support for the watchdog inter- rupt timer present on all Intel ICH motherboard chipsets. The ICH WDT counts down in ticks of approximately 0.6 seconds; the ex- act value depends on hardware quality and environmental factors. Sup- ported watchdog intervals range from 2 to 63 ticks. Note that on some ICH-based systems, the WDT may be present but dis- abled, 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 disabled. SEE ALSO 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. HISTORY The ichwd driver first appeared in FreeBSD 5.3. AUTHORS The ichwd driver was written by Wm. Daryl Hawkins <dhawkins@tamu.edu> of Texas A&M University and Dag-Erling Smorgrav <des@FreeBSD.org>. This manual page was written by Dag-Erling Smorgrav <des@FreeBSD.org>. FreeBSD 14.3 August 20, 2008 ICHWD(4)
NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | AUTHORS
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=ichwd&sektion=4&manpath=FreeBSD+14.3-RELEASE+and+Ports>