72 lines
2.6 KiB
Groff
72 lines
2.6 KiB
Groff
.\" $NetBSD: intio.4,v 1.3 2000/11/07 05:44:50 lukem Exp $
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.\"
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.\" Copyright (c) 1998 MINOURA Makoto
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.\" Copyright (c) 1998 NetBSD Foundation, Inc.
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.\" All rights reserved.
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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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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by Minoura Makoto.
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.\" 4. The name of the author may not be used to endorse or promote products
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.\" derived from this software without specific prior written permission
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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 Mar. 17, 1999
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.Os
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.Dt INTIO 4 x68k
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.Sh NAME
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.Nm intio
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.Nd X68K internal I/O space driver
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.Sh SYNOPSIS
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.Cd "intio0 at mainbus0"
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.Sh DESCRIPTION
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.Nm
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is a virtual device corresponding to the x68k internal I/O space.
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.Pp
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Internal I/O space spans from 0xc00000 to 0xffffff of the x68k
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physical address space, and is mapped permanently in the kernel virtual space
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at the very early time of the kernel startup procedure.
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.Pp
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.Nm
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driver manages the internal I/O space of x68k.
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.Pp
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.Bl -bullet -offset indent -tag
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.It
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Address range management to avoid confliction of address space of
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which devices probe by touching hardware port is difficult.
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.It
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Interrupt vector management.
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.It
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.Xr bus_space 9
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and
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.Xr bus_dma 9
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implementation.
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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 NetBSD kernel.
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.Sh SEE ALSO
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.Xr intro 4 ,
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.Xr bus_space 9 ,
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.Xr bus_dma 9 .
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