1*e5cc2e7eSschwarze.\" $OpenBSD: pwdog.4,v 1.7 2013/07/16 16:05:49 schwarze Exp $ 2d6ded4feSmbalmer.\" 3d6ded4feSmbalmer.\" Copyright (c) 2006 Marc Balmer <mbalmer@openbsd.org> 4d6ded4feSmbalmer.\" 5d6ded4feSmbalmer.\" Permission to use, copy, modify, and distribute this software for any 6d6ded4feSmbalmer.\" purpose with or without fee is hereby granted, provided that the above 7d6ded4feSmbalmer.\" copyright notice and this permission notice appear in all copies. 8d6ded4feSmbalmer.\" 9d6ded4feSmbalmer.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10d6ded4feSmbalmer.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11d6ded4feSmbalmer.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12d6ded4feSmbalmer.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13d6ded4feSmbalmer.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14d6ded4feSmbalmer.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15d6ded4feSmbalmer.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16d6ded4feSmbalmer.\" 17*e5cc2e7eSschwarze.Dd $Mdocdate: July 16 2013 $ 18d6ded4feSmbalmer.Dt PWDOG 4 19d6ded4feSmbalmer.Os 20d6ded4feSmbalmer.Sh NAME 21d6ded4feSmbalmer.Nm pwdog 22d7704198Sjmc.Nd Quancom PWDOG1 watchdog timer device 23d6ded4feSmbalmer.Sh SYNOPSIS 24d6ded4feSmbalmer.Cd "pwdog0 at pci?" 25d6ded4feSmbalmer.Sh DESCRIPTION 26d6ded4feSmbalmerThe 27d6ded4feSmbalmer.Nm 2801e8a3dcSjmcdriver provides support for Quancom PWDOG1 boards. 29d6ded4feSmbalmer.Pp 30d6ded4feSmbalmerIf the kernel crashes, the watchdog timer is not reset and the system will 31d6ded4feSmbalmerreboot (assuming a proper connection is made between the PWDOG1 and 32d6ded4feSmbalmerthe motherboard). 33d6ded4feSmbalmerAlternatively, the watchdog can be reinitialized via a userland process which 34d6ded4feSmbalmerensures that process scheduling, not just kernel timeout processing, is still 35d6ded4feSmbalmertaking place. 36d6ded4feSmbalmerSee 37d6ded4feSmbalmer.Xr watchdog 4 38d6ded4feSmbalmerand 39d6ded4feSmbalmer.Xr watchdogd 8 40d6ded4feSmbalmerfor more information. 41d6ded4feSmbalmer.Pp 42f9c6b42eSjmcThe timeout period of the PWDOG1 card is set using DIP switches and cannot 4301e8a3dcSjmcbe changed by software. 44d6ded4feSmbalmer.Sh SEE ALSO 45d6ded4feSmbalmer.Xr intro 4 , 46d6ded4feSmbalmer.Xr pci 4 , 47d6ded4feSmbalmer.Xr watchdog 4 , 48d6ded4feSmbalmer.Xr watchdogd 8 49d6ded4feSmbalmer.Sh HISTORY 50d6ded4feSmbalmerThe 51d6ded4feSmbalmer.Nm 52d6ded4feSmbalmerdriver first appeared in 53d6ded4feSmbalmer.Ox 4.1 . 54d6ded4feSmbalmer.Sh AUTHORS 55d6ded4feSmbalmerThe 56d6ded4feSmbalmer.Nm 57d6ded4feSmbalmerdriver was written by 58*e5cc2e7eSschwarze.An Marc Balmer Aq Mt mbalmer@openbsd.org . 59