Electrical computers and digital data processing systems: input/ – Access locking
Reexamination Certificate
2006-01-11
2008-12-09
Patel, Ashok B (Department: 2154)
Electrical computers and digital data processing systems: input/
Access locking
C710S220000, C710S240000
Reexamination Certificate
active
07464208
ABSTRACT:
In a multiprocessor, access to shared resources is provided by a semaphore control mechanism, herein disclosed. The semaphore control mechanism provides for a high degree of programmable firmware reuse requiring relatively few modifications from a uniprocessor. The semaphore control mechanism receives one or more semaphore modification requests from one or more requesting devices, identifies an ownership state of a semaphore corresponding to the one or more semaphore modification requests, arbitrates to identify modification request from a particular requesting device to succeed if the identified ownership state corresponds to the particular requesting device or if the identified ownership state corresponds to no ownership.
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Nguyen Hang
Tu Steven
Intel Corporation
Mennemeier Lawrence M.
Patel Ashok B
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