A split operation such as a split read or a split write is handled by a bus
bridge circuit. The bus bridge receives the read or write command from a
requesting device, where the command includes a bus number for routing a
completion of the command. The bus bridge then compares the bus number
received from the requesting device with the return route bus number range
of the bus bridge, and issues a split response to the requesting device if
the bus number matches the return route bus number range of the bus
bridge. If the bus number does not match the return route bus number
range, then the command is aborted.
