NAME
fdtbus —
Flattened Device Tree bus
driver
SYNOPSIS
options FDT
DESCRIPTION
Thefdtbus 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
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.