Patents Assigned to Sun Mocrosystems, Inc.
  • Apparatus and method to prevent overwriting of modified cache entries prior to write back
    Patent number: 6286082
    Abstract: A hazard control circuit for a cache controller that prevents overwriting of modified cache data without write back. The cache controller controls a non-blocking, N-way set associative cache that uses a write-back cache-coherency protocol. The hazard control circuit prevents data loss by deferring assignment until after completion of a pending fill for that way. The hazard control circuit of the present invention includes a transit hazard buffer, a stall assertion circuit and a way assignment circuit.
    Type: Grant
    Filed: April 19, 1999
    Date of Patent: September 4, 2001
    Assignee: Sun Mocrosystems, Inc.
    Inventors: Anuradha N. Moudgal, Belliappa M. Kuttanna