NAME

       fdtbus — Flattened Device Tree bus driver

SYNOPSIS

       options FDT

DESCRIPTION

       The  fdtbus  abstract  bus driver is the primary connection and translation layer between fdt(4) hardware
       resources description and FreeBSD native newbus device drivers framework.  For an embedded system  fdtbus
       represents peripherals typically found on a highly integrated chip (system-on-chip).

       The fdtbus driver provides generic, common infrastructure for all fdt(4) oriented device drivers, and its
       main responsibilities are the following:

       •   Creating newbus children that reflect fdt(4) nodes in the flattened device tree.

       •   Managing SYS_RES_IRQ resources.

       •   Managing SYS_RES_MEMORY, SYS_RES_IOPORT resources.

SEE ALSO

       fdt(4), openfirm(4), simplebus(4)

STANDARDS

       IEEE  Std  1275:  IEEE  Standard  for Boot (Initialization Configuration) Firmware: Core Requirements and
       Practices (Open Firmware).

       Power.org Standard for Embedded Power Architecture Platform Requirements (ePAPR).

HISTORY

       The fdtbus support first appeared in FreeBSD 9.0.

AUTHORS

       The fdtbus support was developed by Semihalf under sponsorship from the FreeBSD Foundation.  This  manual
       page was written by Rafal Jaworowski.

Debian                                            July 12, 2010                                        FDTBUS(4)