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     siba — Sonic Inc. Silicon Backplane driver


     To compile this driver into the kernel, add the following lines to the kernel configuration

           device bhnd
           device siba

     To load the driver as a module at boot, add this line to loader.conf(5):



     The siba driver provides bhnd(4) support for devices based on the Sonic Inc. Silicon
     Backplane, an interblock communications architecture found in earlier Broadcom Home
     Networking Division wireless chipsets and embedded systems.

     A common interconnect connects all of the Silicon Backplane's functional blocks.  These
     functional blocks, known as cores, use the Open Core Protocol (OCP) interface to communicate
     with agents attached to the Silicon Backplane.

     Each core can have an initiator agent that passes read and write requests onto the system
     backplane and a target agent that returns responses to those requests.  Not all cores
     contain both an initiator and a target agent.  Initiator agents are present in cores that
     contain host interfaces (PCI, PCMCIA), embedded processors (MIPS), or DMA processors
     associated with communications cores.


     bcma(4), bhnd(4), intro(4)


     The siba device driver first appeared in FreeBSD 8.0.  The driver was rewritten for
     FreeBSD 11.0 to support the common Broadcom bhnd(4) bus interface.


     The siba driver was originally written by Bruce M. Simpson <> and Weongyo
     Jeong <>.  The driver was rewritten for FreeBSD 11.0 by Landon Fuller