Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2006-05-16
2006-05-16
Verbrugge, Kevin (Department: 2189)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S002000, C711S118000, C711S154000, C711S170000, C711S205000, C711S206000
Reexamination Certificate
active
07047382
ABSTRACT:
A method and system for allowing a processor or I/O master to address more system memory than physically exists are described. A Compressed Memory Management Unit (CMMU) may keep least recently used pages compressed, and most recently and/or frequently used pages uncompressed in physical memory. The CMMU translates system addresses into physical addresses, and may manage the compression and/or decompression of data at the physical addresses as required. The CMMU may provide data to be compressed or decompressed to a compression/decompression engine. In some embodiments, the data to be compressed or decompressed may be provided to a plurality of compression/decompression engines that may be configured to operate in parallel. The CMMU may pass the resulting physical address to the system memory controller to access the physical memory. A CMMU may be integrated in a processor, a system memory controller or elsewhere within the system.
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International Search Report, Application No. PCT/US 01/45147, Mailed Nov. 15, 2002.
Alvarez, II Manuel J.
Dye Thomas A.
Geiger Peter
Adams Michael P.
Quickshift, Inc.
Verbrugge Kevin
Winstead Sechrest & Minick P.C.
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