69 lines
2.4 KiB
Groff
69 lines
2.4 KiB
Groff
.\" $NetBSD: ebus.4,v 1.2 2011/02/14 21:13:17 pooka Exp $
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.\"
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.\" Copyright (c) 2010 NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This file is derived from work contributed by Microsoft Corporation.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd July 17, 2010
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.Dt EBUS 4 emips
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.Os
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.Sh NAME
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.Nm ebus
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.Nd eMIPS Extensible I/O BUS driver
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.Sh SYNOPSIS
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.Cd "ebus0 at mainbus0"
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.Sh DESCRIPTION
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.Nm
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is a virtual device for the Extensible I/O BUS realized with eMIPS
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on FPGA boards such as the BEE3, Xilinx XUP, and Xilinx ML40x systems.
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.Pp
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Devices on the BUS can generally be relocated and can be found by
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scanning the Peripheral Mapping Table at the top of the BUS physical space.
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The driver is responsible for identifying devices that are currently available,
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and to map them into the kernel virtual space during the kernel startup procedure.
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.Pp
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The
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.Nm
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driver manages the Extensible I/O BUS on eMIPS and provides
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.Pp
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.Bl -bullet -offset indent
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.It
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Address range management to avoid conflicts.
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.It
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Interrupt vector management.
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.It
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Other utility functions.
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.El
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.Pp
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.Nm
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is always required to run the
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.Nx
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kernel.
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.Sh SEE ALSO
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.Xr intro 4 ,
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.Xr ace 4 ,
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.Xr dz 4 ,
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.Xr eclock 4 ,
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.Xr enic 4
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