1.\" $OpenBSD: tcpcib.4,v 1.5 2013/07/16 16:05:49 schwarze Exp $ 2.\" 3.\" Copyright (c) 2012 Matt Dainty <matt@bodgit-n-scarper.com> 4.\" 5.\" Permission to use, copy, modify, and distribute this software for any 6.\" purpose with or without fee is hereby granted, provided that the above 7.\" copyright notice and this permission notice appear in all copies. 8.\" 9.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 10.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 11.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 12.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 13.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 14.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 15.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 16.\" 17.Dd $Mdocdate: July 16 2013 $ 18.Dt TCPCIB 4 i386 19.Os 20.Sh NAME 21.Nm tcpcib 22.Nd Intel Atom E600 series LPC bridge, timecounter and watchdog timer 23.Sh SYNOPSIS 24.Cd "tcpcib* at pci?" 25.Cd "isa* at tcpcib?" 26.Sh DESCRIPTION 27The 28.Nm 29driver provides support for the Intel Atom E600 series LPC bridge and 30implements a 64-bit 14.3 MHz timecounter using the HPET timer. 31.Pp 32The 33.Nm 34driver also provides the standard 35.Xr watchdog 4 36interface to the watchdog timer and may be used with 37.Xr watchdogd 8 . 38The watchdog timer can be configured via 39.Xr sysctl 8 . 40.Pp 41Once the watchdog timer resets the CPU, the driver reports it on the 42next boot displaying the ``reboot on timeout'' message in the 43.Xr dmesg 8 . 44.Pp 45The maximum timeout value supported by the watchdog timer is 600 46seconds. 47.Sh SEE ALSO 48.Xr intro 4 , 49.Xr isa 4 , 50.Xr pci 4 , 51.Xr watchdog 4 , 52.Xr sysctl 8 , 53.Xr watchdogd 8 54.Sh HISTORY 55The 56.Nm 57driver first appeared in 58.Ox 5.2 . 59.Sh AUTHORS 60The 61.Nm 62driver was written by 63.An Matt Dainty Aq Mt matt@bodgit-n-scarper.com . 64.Sh BUGS 65Apart from the core 66.Xr pcib 4 67functionality, timecounter and the 68.Xr watchdog 4 69interface, the driver doesn't support any other aspects of the hardware. 70