1.\" 2.\" Copyright (c) 2010 The FreeBSD Foundation 3.\" 4.\" This software was developed by Semihalf under sponsorship from 5.\" the FreeBSD Foundation. 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.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" $FreeBSD$ 29.\" 30.Dd July 12, 2010 31.Dt SIMPLEBUS 4 32.Os 33.Sh NAME 34.Nm simplebus 35.Nd ePAPR simple-bus driver 36.Sh SYNOPSIS 37.Cd "options FDT" 38.Sh DESCRIPTION 39This bus driver is dedicated for the 40.Pa simple-bus 41node of a flattened device tree compliant with the 42.Pa ePAPR 43specification. 44.Pp 45The 46.Nm 47entity does not represent any physical element by itself, it is rather an 48umbrella node grouping integrated on-chip peripherals like interrupt 49controller, connectivity controllers, accelerating engines and so on. 50.Pp 51The driver is generic and common for all flattened device tree nodes claiming 52.Pa simple-bus 53compatibility. 54It 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. 82This manual page was written by 83.An Rafal Jaworowski . 84