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RapidIO Subsystem Guide


RapidIO is a high speed switched fabric interconnect with features aimed at the embedded market. RapidIO provides support for memory-mapped I/O as well as message-based transactions over the switched fabric network. RapidIO has a standardized discovery mechanism not unlike the PCI bus standard that allows simple detection of devices in a network.

This documentation is provided for developers intending to support RapidIO on new architectures, write new drivers, or to understand the subsystem internals.

Known Bugs and Limitations


None. ;)


Access/management of RapidIO memory regions is not supportedMultiple host enumeration is not supported

RapidIO driver interface

Drivers are provided a set of calls in order to interface with the subsystem to gather info on devices, request/map memory region resources, and manage mailboxes/doorbells.



This chapter contains the autogenerated documentation of the RapidIO subsystem.


Enumeration and Discovery

Driver functionality

Device model support

Sysfs support

PPC32 support


The following people have contributed to the RapidIO subsystem directly or indirectly: Matt Portermporter@kernel.crashing.orgRandy Vinsonrvinson@mvista.comDan

The following people have contributed to this document: Matt

About This Book


  • Matt Porter

Copyright 2005

  • MontaVista Software, Inc.

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