fdtbus —
Flattened Device Tree bus driver
options FDT
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.
fdt(4),
openfirm(4),
simplebus(4)
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).
The
fdtbus support first appeared in
FreeBSD 9.0.
The
fdtbus support was developed by Semihalf under
sponsorship from the FreeBSD Foundation. This manual page was written by
Rafal Jaworowski.