Data synchronization hardware primitive in an embedded...

Details Data synchronization hardware primitive in an embedded... Data synchronization hardware primitive in an embedded...

2006-11-14

2006-11-14

An, Meng-Ai T. (Department: 2195)

Electrical computers and digital processing systems: virtual mac

Task management or control

Process scheduling

C718S103000, C711S147000

Reexamination Certificate

active

07137118

ABSTRACT:
An embedded symmetrical multiprocessor system includes arbitration logic that determines which central processing unit has access to shared memory. Upon grant of access, the memory address is stored in a memory address register. An address compare circuit compares the access address of any other central processing unit with this stored address. Upon a match, the arbitration logic stalls the second accessing central processing unit until expiration of a programmable number of wait states following the first access. These wait states give the first central processing unit enough time to determine the state of a lock variable and take control of an operation protected by the lock variable. The application boot code can determine how long the read-check-write operation requires and program that value into the wait-state generator.

REFERENCES:
patent: 4847757 (1989-07-01), Smith
patent: 5740404 (1998-04-01), Baji
patent: 6009495 (1999-12-01), DeRoo et al.
patent: 6014729 (2000-01-01), Lannan et al.
patent: 6954873 (2005-10-01), Jain
Altera, “System Design Using SOPC Builder” (Dec. 2004).

Affiliated with

Also associated with

Rating

Data synchronization hardware primitive in an embedded... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data synchronization hardware primitive in an embedded..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data synchronization hardware primitive in an embedded... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3678024