1.\" 2.\" Copyright (c) 2010 The FreeBSD Foundation 3.\" All rights reserved. 4.\" 5.\" This software was developed by Semihalf under sponsorship from 6.\" the FreeBSD Foundation. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 17.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27.\" SUCH DAMAGE. 28.\" 29.\" $FreeBSD$ 30.\" 31.Dd July 12, 2010 32.Dt SIMPLEBUS 4 33.Os 34.Sh NAME 35.Nm simplebus 36.Nd ePAPR simple-bus driver 37.Sh SYNOPSIS 38.Cd "options FDT" 39.Sh DESCRIPTION 40This bus driver is dedicated for the 41.Pa simple-bus 42node of a flattened device tree compliant with the 43.Pa ePAPR 44specification. 45.Pp 46The 47.Nm 48entity does not represent any physical element by itself, it is rather an 49umbrella node grouping integrated on-chip peripherals like interrupt 50controller, connectivity controllers, accelerating engines and so on. 51.Pp 52The driver is generic and common for all flattened device tree nodes claiming 53.Pa simple-bus 54compatibility. It iterates over direct descendants of the 55.Pa simple-bus 56node, instantiates newbus children and assigns resources to them, based on the 57configuration data retrieved from the nodes properties in 58.Xr fdt 4 . 59.Pp 60Note the 61.Nm 62does not manage device resources and passes through any requests to the 63.Xr fdtbus 4 64layer. 65.Sh SEE ALSO 66.Xr fdt 4 , 67.Xr fdtbus 4 , 68.Xr openfirm 4 69.Sh STANDARDS 70Power.org Standard for Embedded Power Architecture Platform Requirements 71.Pq Vt ePAPR . 72.Sh HISTORY 73The 74.Nm 75support first appeared in 76.Fx 9.0 . 77.Sh AUTHORS 78The 79.Nm 80support was developed by Semihalf under sponsorship from the FreeBSD 81Foundation. This manual page was written by 82.An Rafal Jaworowski . 83