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+.\"-
+.\" Copyright (c) 1999 Matthew R. Green
+.\" 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. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. The name of the author may not be used to endorse or promote products
+.\"    derived from this software without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
+.\"
+.\"	from: OpenBSD: ebus.4,v 1.6 2004/09/23 18:28:51 jason Exp
+.\"	from: NetBSD: ebus.4,v 1.3 2002/03/13 21:42:20 wiz Exp
+.\" $FreeBSD$
+.\"
+.Dd September 1, 2006
+.Dt EBUS 4 sparc64
+.Os
+.Sh NAME
+.Nm ebus
+.Nd "EBus controller and bus"
+.Sh SYNOPSIS
+.Cd "device ebus"
+.Sh DESCRIPTION
+The
+.Nm
+driver provides support for the EBus controller and bus found in most
+.Tn PCI
+based
+.Tn UltraSPARC
+systems.
+The
+.Tn EBus
+bus is designed to provide the ability to put
+.Tn ISA
+and traditional
+.Tn Intel
+style peripherals in a
+.Tn SPARC
+based system with a minimal amount of glue logic.
+In
+.Tn UltraSPARC
+systems it is implemented with either a PCIO or a PCIO-2 chip from
+.Tn Sun Microelectronics .
+The PCIO chip also implements a
+.Xr hme 4
+compatible
+.Tn PCI
+network device.
+The PCIO-2 chip also implements a
+.Xr fwohci 4
+compatible
+.Tn IEEE
+.Tn 1394
+.Tn OHCI
+interface, a
+.Xr gem 4
+compatible
+.Tn PCI
+network device and an
+.Xr ohci 4
+compatible
+.Tn OHCI
+.Tn USB
+controller.
+The
+.Tn EBus
+has four DMA channels,
+similar to the DMA seen in the
+.Xr esp 4
+.Tn SCSI
+DMA.
+.Sh SEE ALSO
+.Xr atkbdc 4 ,
+.Xr auxio 4 ,
+.Xr eeprom 4 ,
+.Xr rtc 4 ,
+.Xr scc 4 ,
+.Xr snd_audiocs 4 ,
+.Xr uart 4
+.Rs
+.%Q "Sun Microelectronics"
+.%T "Peripheral Component Interconnect Input Output Controller"
+.%V "Part No.: 802-7837-01"
+.%D "March 1997"
+.%U "http://www.sun.com/oem/products/manuals/802-7837.pdf"
+.Re
+.Sh HISTORY
+The
+.Nm
+driver first appeared in
+.Nx 1.5 .
+The first
+.Fx
+version to include it was
+.Fx 5.0 .
+.Sh AUTHORS
+.An -nosplit
+The
+.Nm
+driver was written by
+.An "Matthew R. Green"
+and ported to
+.Fx
+by
+.An "Thomas Moestl" Aq tmm@FreeBSD.org .