Patents by Inventor Iat Pui Chan

Iat Pui Chan 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).

  • Snooping with access permissions
    Patent number: 10942865
    Abstract: A method and apparatus are provided to enable snoop forwarding to occur together with memory protection. A data processing apparatus in, for instance, the form of a home node forwards a snoop forwarding request on behalf of a requester to a target, the snoop forwarding request being capable of indicating one or more access permissions of the target in relation to the data. A further data processing apparatus in the form of, for instance, a receiver node may receive the snoop forwarding request and based on its own permissions that are provided in the snoop forwarding request, together with the state of the data, either provide a response back to the requester or the home node. In a still further data processing apparatus in the form of, for instance, a Memory Protection Unit (MPU), a regular snoop forwarding request made to a target in relation to data can be forwarded to the target or demoted to a non-forwarding snoop request based on the permissions of the target in relation to the data at the MPU.
    Type: Grant
    Filed: June 13, 2019
    Date of Patent: March 9, 2021
    Assignee: Arm Limited
    Inventors: Gurunath Ramagiri, Tushar P. Ringe, Mukesh Patel, Jamshed Jalal, Iat Pui Chan, Lakshmi Joga Vishnu Vardhan Badukonda
  • Snooping With Access Permissions
    Publication number: 20200394141
    Abstract: A method and apparatus are provided to enable snoop forwarding to occur together with memory protection. A data processing apparatus in, for instance, the form of a home node forwards a snoop forwarding request on behalf of a requester to a target, the snoop forwarding request being capable of indicating one or more access permissions of the target in relation to the data. A further data processing apparatus in the form of, for instance, a receiver node may receive the snoop forwarding request and based on its own permissions that are provided in the snoop forwarding request, together with the state of the data, either provide a response back to the requester or the home node. In a still further data processing apparatus in the form of, for instance, a Memory Protection Unit (MPU), a regular snoop forwarding request made to a target in relation to data can be forwarded to the target or demoted to a non-forwarding snoop request based on the permissions of the target in relation to the data at the MPU.
    Type: Application
    Filed: June 13, 2019
    Publication date: December 17, 2020
    Applicant: Arm Limited
    Inventors: Gurunath Ramagiri, Tushar P. Ringe, Mukesh Patel, Jamshed Jalal, Iat Pui Chan, Lakshmi Joga Vishnu Vardhan Badukonda