Configurable cache and method to configure same
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United States of America Patent
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Jan 27, 2015
Issued Date -
N/A
app pub date -
Mar 19, 2014
filing date -
Mar 3, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A method includes receiving an address at a tag state array of a cache, wherein the cache is configurable to have a first size and a second size that is smaller than the first size. The method further includes identifying a first portion of the address as a set index, wherein the first portion has a same number of bits when the cache has the first size as when the cache has the second size. The method further includes using the set index to locate at least one tag field of the tag state array, identifying a second portion of the address to compare to a value stored at the at least one tag field, locating at least one state field of the tag state array that is associated with a particular tag field that matches the second portion, identifying a cache line based on a comparison of a third portion of the address to at least one status bit of the at least one state field when the cache has the second size, and retrieving the cache line.
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