Dynamic remapping of address registers for address translation between multiple busses

Abstract

Address translation between various peripheral bus interfaces is provided through a bus interface device. Specifically, the bus interface device translates incoming transactions from a source bus interface to a different address or location within a destination bus interface. Flexibility for communications between multiple bus interfaces having different, possibly conflicting, address spaces is ensured by allowing the internal translation registers to be dynamically reprogrammed. Reprogramming of the translation registers may occur during runtime bus operations. These registers define translation windows within which a transaction will be claimed and translated to the destination bus interface. Translation is accomplished using the translation registers to identify portions of the incoming received address which should not be translated because those portions contain the information to be communicated. At the same time, portions identifying only the location of the information are translated to identify a different location within the destination address space.