1.\" $OpenBSD: fhc.4,v 1.8 2008/01/18 22:06:01 jmc Exp $ 2.\" 3.\" Copyright (c) 2004 Jason L. Wright (jason@thought.net) 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17.\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18.\" DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, 19.\" INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 20.\" (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21.\" SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 23.\" STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 24.\" ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 25.\" POSSIBILITY OF SUCH DAMAGE. 26.\" 27.Dd $Mdocdate: January 18 2008 $ 28.Dt FHC 4 sparc64 29.Os 30.Sh NAME 31.Nm fhc 32.Nd SPARC64 FireHose controller 33.Sh SYNOPSIS 34.Cd "fhc* at central?" 35.Cd "fhc* at mainbus0" 36.Sh DESCRIPTION 37The 38.Nm 39device provides support for the 40FireHose controllers 41found on Sunfire, Starfire, and Wildfire 42UltraSPARC systems. 43These devices are used for board level 44functions on these systems. 45This device also controls an LED for each slot. 46This LED can be made to blink based on the load average on most systems 47by setting the 48.Xr sysctl 3 49variable 50.Ar machdep.led_blink 51to a non-zero value. 52.Sh HARDWARE 53.Ox 54includes the following 55.Nm 56drivers, sorted by driver name: 57.Pp 58.Bl -tag -width zs/zstty/zskbd(4) -offset ind -compact 59.It Xr clkbrd 4 60SPARC64 Clock Board 61.It Xr clock 4 62Real-time clock 63.It Xr environ 4 64SPARC64 temperature sensor 65.It Xr zs/zstty/zskbd 4 66Zilog 8530 (ZSCC) serial communications driver 67.El 68.Sh SEE ALSO 69.Xr sysctl 3 , 70.Xr central 4 , 71.Xr intro 4 72.Sh HISTORY 73.Ox 74support for the 75.Nm 76first appeared in 77.Ox 3.7 . 78