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.