Patent ID: 6901475

Claim:
A method of operating a processor based system, the system comprising a hub coupled to a processor by a processor bus and coupled to a memory device by a memory bus, said hub being connected to a first device by a first link bus, the first device communicating with the processor and the memory device via the hub, said method comprising the steps of: detecting at the first device an occurrence of an event from a second device connected to the first device; identifying an event type of the detected event; determining if data buffers of the first device must be flushed based on the indentified event type; flushing targeted data buffers of the first device to memory if it is determined that data buffers of the first device must be flushed; composing a message identifying the occurrence of the detected event, the message comprising at least the identified event type; and transmitting the composed message to the hub over the first link bus.