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.