Method of updating cache state information where stores only...

Details Method of updating cache state information where stores only... Method of updating cache state information where stores only...

2007-11-27

2007-11-27

Ellis, Kevin L. (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

Reexamination Certificate

active

10897348

ABSTRACT:
The present invention provides a method of updating the cache state information for store transactions in an system in which store transactions only read the cache state information upon entering the unit pipe or store portion of the store/load queue. In this invention, store transactions in the unit pipe and queue are checked whenever a cache line is modified, and their cache state information updated as necessary. When the modification is an invalidate, the check tests that the two share the same physical addressable location. When the modification is a validate, the check tests that the two involve the same data cache line.

REFERENCES:
patent: 5717896 (1998-02-01), Yung et al.
patent: 5913054 (1999-06-01), Mallick et al.
patent: 2002/0188817 (2002-12-01), Norden et al.
patent: 2003/0225980 (2003-12-01), Henry et al.
patent: 2005/0138295 (2005-06-01), Hammarlund et al.

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