AMDSBWD(4) BSD Kernel Interfaces Manual AMDSBWD(4)NAME
amdsbwd -- device driver for the AMD SB600/SB700/SB710/SB750 watchdog timer
SYNOPSIS
To compile this driver into the kernel, place the following line in your kernel configuration file:
device amdsbwd
Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
amdsbwd_load="YES"
DESCRIPTION
The amdsbwd driver provides watchdog(4) support for the watchdog timers present on AMD SB600 and SB7xx south bridge chips.
SEE ALSO watchdog(4), watchdog(8), watchdogd(8), watchdog(9)HISTORY
The amdsbwd driver first appeared in FreeBSD 9.0.
AUTHORS
The amdsbwd driver was written by Andiry Gapon <avg@FreeBSD.org>. This manual page was written by Andiry Gapon <avg@FreeBSD.org>.
BSD November 30, 2009 BSD
Check Out this Related Man Page
WBWD(4) BSD Kernel Interfaces Manual WBWD(4)NAME
wbwd -- device driver for watchdog timer found on Winbond Super I/O chips
SYNOPSIS
To compile this driver into the kernel, place the following line in your kernel configuration file:
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:
o 83627HF/F/HG/G Rev. G
o 83627HF/F/HG/G Rev. J
o 83627HF/F/HG/G Rev. UD-A
o 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 FreeBSD 10.0.
AUTHORS
This manual page was written by Bjoern A. Zeeb <bz@FreeBSD.org>.
BSD December 28, 2012 BSD
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