GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  WBWD (4)

NAME

wbwd - device driver for watchdog timer found on Winbond Super I/O chips

CONTENTS

Synopsis
Description
Sysctl Variables
See Also
History
Authors

SYNOPSIS

To compile this driver into the kernel, place the following line in your kernel configuration file:


.Cd device wbwd

Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

wbwd_load="YES"

DESCRIPTION

The wbwd driver provides watchdog(4) support for the watchdog interrupt timer present on at least the following Winbond Super I/O chips:

  • 83627HF/F/HG/G Rev. G
  • 83627HF/F/HG/G Rev. J
  • 83627HF/F/HG/G Rev. UD-A
  • 83627DHG IC ver. 5

SYSCTL VARIABLES

The wbwd driver provides the following options as sysctl(8) variables.
dev.wbwd.0.timeout_override
  This variable allows to program the timer to a value independent on the one provided by the watchdog(4) framework while still relying on the regular updates from e.g. watchdogd(8). This is particularly useful if your system provides multiple watchdogs and you want them to fire in a special sequence to trigger an NMI after a shorter period than the reset timeout for example. The value set must not be lower than the sleep time of watchdogd(8). A value of 0 disables this feature and the timeout value provided by watchdog(4) will be used.
dev.wbwd.0.debug_verbose
  If set this sysctl will tell the driver to log its current state before and after the timer reset on each invocation from watchdog(9) to the kernel message buffer for debugging.
dev.wbwd.0.debug
  This read-only value gives the state of some registers on last update.

The wbwd driver also provides further sysctl options that are hidden by default. See the source code for more information.

SEE ALSO

watchdog(4), device.hints(5), watchdog(8), watchdogd(8), watchdog(9)

HISTORY

The wbwd driver first appeared in
.Fx 10.0 .

AUTHORS


.An -nosplit This manual page was written by
.An Bjoern A. Zeeb Aq bz@FreeBSD.org .
Search for    or go to Top of page |  Section 4 |  Main Index


Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.