1.\" $OpenBSD: runway.4,v 1.5 2007/05/31 19:19:54 jmc Exp $ 2.\" 3.\" Copyright (c) 2004 Michael Shalayeff 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF MIND, 21.\" USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25.\" 26.Dd $Mdocdate: May 31 2007 $ 27.Dt RUNWAY 4 hppa 28.Os 29.Sh NAME 30.Nm runway 31.Nd Runway bus 32.Sh SYNOPSIS 33.Cd "uturn* at mainbus?" 34.Sh DESCRIPTION 35The 36.Nm 37bus is a CPU and memory bus on systems based on the PA-7200, 38PA-8000, and later CPUs. 39The 40.Nm 41bus is a 64-bit multiplexed address/data bus with support for cache 42coherency and allows up to 4-way SMP system configurations. 43.Pp 44One or two 45.Xr uturn 4 46bridges connect the 47.Nm 48bus to the system's 49.Xr gsc 4 50or 51.Xr pci 4 52buses. 53.Sh SEE ALSO 54.Xr cpu 4 , 55.Xr dino 4 , 56.Xr gsc 4 , 57.Xr intro 4 , 58.Xr pci 4 , 59.Xr uturn 4 60.Sh HISTORY 61The 62.Nm 63driver 64first appeared in 65.Ox 3.7 . 66