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.Dd July 12, 2010 29.Dt SIMPLEBUS 4 30.Os 31.Sh NAME 32.Nm simplebus 33.Nd ePAPR simple-bus driver 34.Sh SYNOPSIS 35.Cd "options FDT" 36.Sh DESCRIPTION 37This bus driver is dedicated for the 38.Pa simple-bus 39node of a flattened device tree compliant with the 40.Pa ePAPR 41specification. 42.Pp 43The 44.Nm 45entity does not represent any physical element by itself, it is rather an 46umbrella node grouping integrated on-chip peripherals like interrupt 47controller, connectivity controllers, accelerating engines and so on. 48.Pp 49The driver is generic and common for all flattened device tree nodes claiming 50.Pa simple-bus 51compatibility. 52It iterates over direct descendants of the 53.Pa simple-bus 54node, instantiates newbus children and assigns resources to them, based on the 55configuration data retrieved from the nodes properties in 56.Xr fdt 4 . 57.Pp 58Note the 59.Nm 60does not manage device resources and passes through any requests to the 61.Xr fdtbus 4 62layer. 63.Sh SEE ALSO 64.Xr fdt 4 , 65.Xr fdtbus 4 , 66.Xr openfirm 4 67.Sh STANDARDS 68Power.org Standard for Embedded Power Architecture Platform Requirements 69.Pq Vt ePAPR . 70.Sh HISTORY 71The 72.Nm 73support first appeared in 74.Fx 9.0 . 75.Sh AUTHORS 76The 77.Nm 78support was developed by Semihalf under sponsorship from the FreeBSD 79Foundation. 80This manual page was written by 81.An Rafal Jaworowski . 82