Method and apparatus for non-speculative pre-fetch operation in data packet processing
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United States of America Patent
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May 9, 2006
Grant Date -
Feb 21, 2002
app pub date -
Jul 5, 2001
filing date -
Feb 8, 2000
priority date (Note) -
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Abstract
A system is provided for enabling a non-speculative pre-fetch operation for processing instructions to be performed in the background ahead of immediate packet processing by a packet processor. The system comprises a packet-management unit for accepting data packets and en-queuing them for processing, a processor unit for processing the data packets, a processor core memory for holding context registers and functional units for processing, a memory for holding a plurality of instruction threads and a software-configurable hardware table for relating queues to pointers to beginnings of instruction threads. The packet-management unit selects an available context in the processor core for processing of a data packet, consults the table, and communicates the pointer to the processor, enabling the processor to perform the non-speculative pre-fetch for instructions.
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