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Cache with Multiple Access Pipelines

  • US 20120079204A1
  • Filed: 08/18/2011
  • Published: 03/29/2012
  • Est. Priority Date: 09/28/2010
  • Status: Active Grant
First Claim
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1. A method of operating a cache having shared memory and tags, the method comprising:

  • accessing the cache via a first pipeline for use by a processor to access cached data from the shared memory;

    accessing the cache via a second pipeline for use by a memory access unit to access the shared memory;

    maintaining a first set of tags for use by the first pipeline to control access to the shared memory;

    maintaining a second set of tags for use by the second pipeline to access the shared memory; and

    arbitrating for access to the shared memory for a transaction request in the first pipeline and for a transaction request in the second pipeline after each pipeline has checked its respective set of tags, wherein a winner of the arbitration is granted access to the shared memory.

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