Bus request mechanism for bus master which is parked on a shared bus

摘要

A method and mechanism for arbitrating access to a bus. A client which is parked on a bus is allowed to gain access to the bus without having to go through arbitration. A client which is parked on the bus does not request access to the bus before beginning a transaction. If another client makes a high priority request for the bus, it gains access to the bus over a parked client. The parked client keeps a count of detected high priority request cycles. Upon reaching a threshold, the parked client requests the bus. The high priority client may then be made aware of the parked client's need for the bus and yield at an appropriate time.