ichwd (4)

Leading comments

-
 Copyright (c) 2007 Dag-Erling Coïdan Smørgrav
 All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    ...

(The comments found at the beginning of the groff file "man4/ichwd.4freebsd".)

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.conf5:

ichwd_load="YES"

DESCRIPTION

The ifconfig driver provides watchdog(4) support for the watchdog interrupt timer present on all Intel ICH motherboard 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 ifconfig 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 ifconfig driver first appeared in Fx 5.3 .

AUTHORS

An -nosplit The ifconfig driver was written by An Wm. Daryl Hawkins Aq dhawkins@tamu.edu of Texas A&M University and An Dag-Erling Sm/orgrav Aq des@FreeBSD.org . This manual page was written by An Dag-Erling Sm/orgrav Aq des@FreeBSD.org .