74 lines
2.6 KiB
Groff
74 lines
2.6 KiB
Groff
.\" $NetBSD: intio.4,v 1.6 2001/10/21 09:42:41 wiz Exp $
|
|
.\"
|
|
.\" Copyright (c) 1998 MINOURA Makoto
|
|
.\" Copyright (c) 1998 NetBSD Foundation, Inc.
|
|
.\" 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. All advertising materials mentioning features or use of this software
|
|
.\" must display the following acknowledgement:
|
|
.\" This product includes software developed by Minoura Makoto.
|
|
.\" 4. 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.
|
|
.\"
|
|
.Dd March 17, 1999
|
|
.Os
|
|
.Dt INTIO 4 x68k
|
|
.Sh NAME
|
|
.Nm intio
|
|
.Nd X68K internal I/O space driver
|
|
.Sh SYNOPSIS
|
|
.Cd "intio0 at mainbus0"
|
|
.Sh DESCRIPTION
|
|
.Nm
|
|
is a virtual device corresponding to the x68k internal I/O space.
|
|
.Pp
|
|
Internal I/O space spans from 0xc00000 to 0xffffff of the x68k
|
|
physical address space, and is mapped permanently in the kernel virtual space
|
|
at the very early time of the kernel startup procedure.
|
|
.Pp
|
|
.Nm
|
|
driver manages the internal I/O space of x68k.
|
|
.Pp
|
|
.Bl -bullet -offset indent -tag
|
|
.It
|
|
Address range management to avoid confliction of address space of
|
|
which devices probe by touching hardware port is difficult.
|
|
.It
|
|
Interrupt vector management.
|
|
.It
|
|
.Xr bus_space 9
|
|
and
|
|
.Xr bus_dma 9
|
|
implementation.
|
|
.It
|
|
Other utility functions.
|
|
.El
|
|
.Pp
|
|
.Nm
|
|
is always required to run the
|
|
.Nx
|
|
kernel.
|
|
.Sh SEE ALSO
|
|
.Xr intro 4 ,
|
|
.Xr bus_dma 9 ,
|
|
.Xr bus_space 9
|