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+.\" $NetBSD: fwhrng.4,v 1.3 2017/02/18 22:39:02 wiz Exp $
+.\"
+.\" Copyright (c) 2010 Jukka Ruohonen <jruohonen@iki.fi>
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Neither the name of the author nor the names of any
+.\" contributors may be used to endorse or promote products derived
+.\" from this software without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
+.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+.\" POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd February 17, 2017
+.Dt FWHRNG 4 x86
+.Os
+.Sh NAME
+.Nm fwhrng
+.Nd Intel Firmware Hub Random Number Generator
+.Sh SYNOPSIS
+.Cd "fwhrng* at ichlpcib?"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for hardware Random Number Generator
+.Pq Tn RNG
+available on some Intel Firmware Hubs
+.Pq Tn FWHs .
+The
+.Nm
+driver accesses the
+.Tn RNG
+through an
+.Tn I/O
+controller hub
+.Pq Tn ICH .
+.Sh SEE ALSO
+.Xr rnd 4 ,
+.Xr x86/ichlpcib 4
+.Rs
+.%A Intel Corporation
+.%T Intel 82802AB/82802AC Firmware Hub (FWH)
+.%D November, 2000
+.%U http://download.intel.com/design/chipsets/datashts/29065804.pdf
+.Re
+.Sh CAVEATS
+The entropy source is not tested for randomness.