Prefetch control in a data processing system

Details Prefetch control in a data processing system Prefetch control in a data processing system

2005-03-22

2005-03-22

Gaffin, Jeffrey (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Peripheral adapting

C710S306000

Reexamination Certificate

active

06871246

ABSTRACT:
A data processing system (10) includes an interconnect (22) where a first interconnect master (12) and a second interconnect master (14) are coupled to the interconnect. A shared storage (35) is coupled to the interconnect for use by the first and second interconnect masters. The data processing system also includes a first control storage circuit (60, 64) which corresponds to the first interconnect master and a second control storage circuit (62, 66) which corresponds to the second interconnect master. In one embodiment, prefetch circuitry (40) is coupled to the first control storage circuit and to the second control storage circuit for selecting one of the first and second control storage circuits based upon which one of the first and second interconnect masters is requesting an access to the shared storage. The prefetch circuitry can then use the selected control storage circuit to determine a prefetch operation triggered by the access to the shared storage.

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