NAME¶
simplebus
—
ePAPR simple-bus driver
SYNOPSIS¶
options FDT
DESCRIPTION¶
This bus driver is dedicated for the
simple-bus node of a flattened device tree
compliant with the
ePAPR specification.
The
simplebus
entity does not represent any
physical element by itself, it is rather an umbrella node grouping integrated
on-chip peripherals like interrupt controller, connectivity controllers,
accelerating engines and so on.
The driver is generic and common for all flattened device tree nodes claiming
simple-bus compatibility. It iterates over
direct descendants of the
simple-bus node,
instantiates newbus children and assigns resources to them, based on the
configuration data retrieved from the nodes properties in
fdt(4).
Note the
simplebus
does not manage device
resources and passes through any requests to the
fdtbus(4) layer.
SEE ALSO¶
fdt(4),
fdtbus(4),
openfirm(4)
STANDARDS¶
Power.org Standard for Embedded Power Architecture Platform Requirements
(
ePAPR).
HISTORY¶
The
simplebus
support first appeared in
FreeBSD 9.0.
AUTHORS¶
The
simplebus
support was developed by
Semihalf under sponsorship from the FreeBSD Foundation. This manual page was
written by
Rafal Jaworowski.