Method and apparatus for communicating data across a bus bridge upon request

An apparatus for a processor to communicate data across a first bus and a bus bridge to a processing means on a remote second bus comprising:

• a) means for storing the data into a processor memory
• b) means for notifying the bus bridge, coupled to the processor and the first bus and the second bus, that the data is in the processor memory;
• c) means for reading the data from the processor memory across the first bus upon request of the bus bridge;
• and
• d) means for forwarding the data from the bus bridge to the processing means across the second bus upon request of the processing means.

A data processing system for a processor to communicate data across a first bus and a bus bridge to a processing means on a second bus comprising:

• a) a processor for processing the data;
• b) a processor memory for storing the data to be processed;
• c) means for notifying the bus bridge, coupled to the processor and the first bus and the second bus, that the data is in the processor memory;
• d) means for reading the data from the processor memory across the first bus upon request of the bus bridge;
• and
• e) means for forwarding the data from the bus bridge to the processing means across the second bus upon request of the processing means.

A computer program product stored in memory for instructing a processor to communicate data across a first bus and a bus bridge to a processing means on a second bus comprising:

• a) means stored in memory for storing the data into a processor memory:
• b) means stored in memory for notifying the bus bridge, coupled to the processor and the first bus and the second bus, that the data is in the processor memory;
• c) means stored in memory for reading the data from the processor memory across the first bus upon request of the bus bridge;
• and
• d) means stored in memory for forwarding the data from the bus bridge to the processing means across the second bus upon request of the processing means.