Patents by Inventor Gary N. Hammon

Gary N. Hammon has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and apparatus for pre-validating regions in a virtual addressing scheme
    Patent number: 6230248
    Abstract: A method and apparatus pre-validate regions in a virtual addressing scheme by storing both the virtual region number (VRN) bits and region identifiers (RIDs) in translation lookaside buffer (TLB) entries. By storing both the VRN bits and RIDs in TLB entries, the region registers can be bypassed when performing most TLB accesses, thereby removing region registers the critical path of the TLB look-up process and enhancing system performance. A TLB in accordance with the present invention includes entries having a valid field, a region pre-validation valid (rpV) field, a virtual region number (VRN) field, a virtual page number (VPN) field, a region identifier (RID) field, a protection and access attributes field, and a physical page number (PPN) field. In addition, a set of region registers contains the RIDs that are active at any given time.
    Type: Grant
    Filed: October 12, 1998
    Date of Patent: May 8, 2001
    Assignee: Institute for the Development of Emerging Architectures, L.L.C.
    Inventors: Stephen G. Burger, James O. Hays, Jonathan K. Ross, William R. Bryg, Rajiv Gupta, Gary N. Hammon, Koichi Yamada