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 FDTBUS 4 33.Os 34.Sh NAME 35.Nm fdtbus 36.Nd Flattened Device Tree bus driver 37.Sh SYNOPSIS 38.Cd "options FDT" 39.Sh DESCRIPTION 40The 41.Nm 42abstract bus driver is the primary connection and translation layer between 43.Xr fdt 4 44hardware resources description and 45.Fx 46native newbus device drivers framework. 47For an embedded system 48.Nm 49represents peripherals typically found on a highly integrated chip 50(system-on-chip). 51.Pp 52The 53.Nm 54driver provides generic, common infrastructure for all 55.Xr fdt 4 56oriented device drivers, and its main responsibilities are the 57following: 58.Bl -bullet 59.It 60Creating newbus children that reflect 61.Xr fdt 4 62nodes in the flattened device tree. 63.It 64Managing SYS_RES_IRQ resources. 65.It 66Managing SYS_RES_MEMORY, SYS_RES_IOPORT resources. 67.El 68.Sh SEE ALSO 69.Xr fdt 4 , 70.Xr openfirm 4 , 71.Xr simplebus 4 72.Sh STANDARDS 73IEEE Std 1275: IEEE Standard for Boot (Initialization Configuration) Firmware: 74Core Requirements and Practices 75.Pq Vt Open Firmware . 76.Pp 77Power.org Standard for Embedded Power Architecture Platform Requirements 78.Pq Vt ePAPR . 79.Sh HISTORY 80The 81.Nm 82support first appeared in 83.Fx 9.0 . 84.Sh AUTHORS 85The 86.Nm 87support was developed by Semihalf under sponsorship from the FreeBSD 88Foundation. 89This manual page was written by 90.An Rafal Jaworowski . 91