viawd(4) [freebsd man page]

VIAWD(4)						   BSD Kernel Interfaces Manual 						  VIAWD(4)

NAME

     viawd -- device driver for VIA south bridge watchdog timer

SYNOPSIS

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

	   device viawd

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

	   viawd_load="YES"

DESCRIPTION

     The viawd driver provides watchdog(4) support for the watchdog interrupt timer present on VIA south bridge chipset (VT8251, CX700, VX800,
     VX855, VX900).

     The VIA south bridge have a built-in watchdog timer, which can be enabled and disabled by user's program and set between 1 to 1023 seconds.

     The viawd driver when unloaded with running watchdog will reschedule the watchdog to 5 minutes.

SEE ALSO

     watchdog(4), watchdog(8), watchdogd(8), watchdog(9)

HISTORY

     The viawd driver first appeared in FreeBSD 10.0.

AUTHORS

     The viawd driver and this manual page were written by Fabien Thomas <fabient@FreeBSD.org>.

BSD
								 December 7, 2011							       BSD

ntwdt(7D)							      Devices								 ntwdt(7D)

NAME

       ntwdt - Netra--based application watchdog timer driver

SYNOPSIS

       /dev/ntwdt

DESCRIPTION

       The  ntwdt  driver is a multithreaded, loadable, non-STREAMS pseudo driver that provides an application with an interface for controlling a
       system watchdog timer.

       The ntwdt driver implements a virtual watchdog timer that a privileged application (Effective UID == 0) controls via IOCTLs.

CONFIGURATION

       You configure the ntwdt driver by modifying the contents of the ntwdt.conf file.

ERRORS

       An open() fails if:

       EPERM	 Effective user ID is not zero.

       ENOENT	 /dev/ntwdt is not present or driver is not installed.

       EAGAIN	 /dev/ntwdt has already been successfully open()'d.

FILES

       /dev/ntwdt		   Special character device.

       kernel/drv/sparcv9/ntwdt    SPARC ntwdt driver binary.

       kernel/drv/ntwdt.conf	   Driver configuraton file.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcakr.u		   |
       +-----------------------------+-----------------------------+
       |Architecture		     |SPARC			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       driver.conf(4), attributes(5)

       Writing Device Drivers

SunOS 5.11							    05 Feb 2005 							 ntwdt(7D)