1.\" $NetBSD: intio.4,v 1.2 2002/01/15 01:36:02 wiz Exp $ 2.\" 3.\" Copyright (c) 1998 MINOURA Makoto 4.\" Copyright (c) 1998 NetBSD Foundation, Inc. 5.\" All rights reserved. 6.\" 7.\" Redistribution and use in source and binary forms, with or without 8.\" modification, are permitted provided that the following conditions 9.\" are met: 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in the 14.\" documentation and/or other materials provided with the distribution. 15.\" 3. All advertising materials mentioning features or use of this software 16.\" must display the following acknowledgement: 17.\" This product includes software developed by Minoura Makoto. 18.\" 4. The name of the author may not be used to endorse or promote products 19.\" derived from this software without specific prior written permission 20.\" 21.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 27.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31.\" 32.Dd September 10, 2001 33.Dt INTIO 4 hp300 34.Os 35.Sh NAME 36.Nm intio 37.Nd hp300 internal I/O space driver 38.Sh SYNOPSIS 39.Cd "intio0 at mainbus0" 40.Sh DESCRIPTION 41.Nm 42is a virtual device corresponding to the hp300 internal I/O space. 43.Pp 44Internal I/O space spans the hp300 physical address space, and is 45mapped permanently in the kernel virtual space at the very early time 46of the kernel startup procedure. 47.Pp 48.Nm 49driver manages the internal I/O space of hp300. 50.Pp 51.Bl -bullet -offset indent -tag 52.It 53Address range management to avoid confliction of address space of 54which devices probe by touching hardware port is difficult. 55.It 56Interrupt vector management. 57.It 58.Xr bus_space 9 59and 60.Xr bus_dma 9 61implementation. 62.It 63Other utility functions. 64.El 65.Pp 66.Nm 67is always required to run the 68.Nx 69kernel. 70.Sh SEE ALSO 71.Xr bus_dma 9 , 72.Xr bus_space 9 73