Patents by Inventor Sean James SALISBURY

Sean James SALISBURY 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).

  • Patent number: 10796040
    Abstract: A method comprises generating, using a computer, an integrated circuit layout including a plurality of data handling nodes interconnected by routing circuitry defining data packet routes between the plurality of data handling nodes; for a transaction source node configured to generate data packets associated with a data handling translation between that transaction source node and a transaction target node and having one or more routing data fields controlling routing of the data packet, detecting, using the computer, a difference between a first routing controlled by the one or more routing data fields and a selected second routing provided by the integrated circuit layout; and providing, using the computer, one or more data mapping nodes in the integrated circuit layout to map an initial value of one or more of the routing data fields of a data packet generated by the transaction source node to a mapped data value, so that the mapped data value controls routing of the data packet using the selected second r
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: October 6, 2020
    Assignee: ARM LIMITED
    Inventors: Sean James Salisbury, Zheng Xu, Arthur Brian Laughton, Charles Filip Brej
  • Patent number: 10740032
    Abstract: Data access routing circuitry 4, 6 is provided for routing data access request to a selected destination node. The data access routing circuitry supports read requests requiring a read response, write requests requiring a write response and at least one type of atomic data access request requiring both a read response and a write response. Resource allocation circuitry 70, 71 is provided to control allocation of resource for handling data access requests which require a read response. The resource allocation circuitry 70, 71 reserves resource for handling the at least one type of atomic data access request and prevents use of the reserved resource 76 for handling read requests.
    Type: Grant
    Filed: October 1, 2018
    Date of Patent: August 11, 2020
    Assignee: Arm Limited
    Inventors: Chiranjeev Acharya, Sean James Salisbury, Eduard Vardanyan, Arthur Brian Laughton
  • Publication number: 20200250281
    Abstract: A method comprises generating, using a computer, an integrated circuit layout including a plurality of data handling nodes interconnected by routing circuitry defining data packet routes between the plurality of data handling nodes; for a transaction source node configured to generate data packets associated with a data handling translation between that transaction source node and a transaction target node and having one or more routing data fields controlling routing of the data packet, detecting, using the computer, a difference between a first routing controlled by the one or more routing data fields and a selected second routing provided by the integrated circuit layout; and providing, using the computer, one or more data mapping nodes in the integrated circuit layout to map an initial value of one or more of the routing data fields of a data packet generated by the transaction source node to a mapped data value, so that the mapped data value controls routing of the data packet using the selected second r
    Type: Application
    Filed: February 5, 2019
    Publication date: August 6, 2020
    Inventors: Sean James SALISBURY, Zheng XU, Arthur Brian LAUGHTON, Charles Filip BREJ
  • Patent number: 10565146
    Abstract: An interconnect, and method of handling supplementary data in an interconnect, are provided. The interconnect has routing circuitry providing a plurality of paths, and routing control circuitry to use the plurality of paths to establish routes through the interconnect between source devices and destination devices coupled to the interconnect, to enable system data to be routed through the interconnect between the source devices and the destination devices. The system data relates to functional operation of a system comprising the interconnect, the source devices and the destination devices. At least a subset of the paths are redundant paths whose use by the routing control circuitry provides the system data with resilience to faults when routing the system data through the interconnect.
    Type: Grant
    Filed: January 2, 2018
    Date of Patent: February 18, 2020
    Assignee: Arm Limited
    Inventors: Andrew Brian Thomas Hopkins, Sean James Salisbury
  • Publication number: 20190379573
    Abstract: An interconnection network is provided for managing data transfer between a plurality of nodes of an integrated circuit. The interconnection network has at least one transmission path originating from an upstream location of the interconnection network, each transmission path being arranged to transmit data blocks from the upstream location to an associated downstream location within that transmission path. Digest generation circuitry is used to generate digests for data blocks, and fault detection circuitry provided in association with the upstream location is arranged to determine presence of a fault condition in the interconnection network. The digest generation circuitry is arranged to generate an upstream digest for a given data block at the upstream location, and to generate a corresponding downstream digest for the given data block at the associated downstream location.
    Type: Application
    Filed: May 28, 2019
    Publication date: December 12, 2019
    Inventors: Julian Jose Hilgemberg PONTES, Andrew David TUNE, Sean James SALISBURY
  • Patent number: 10437750
    Abstract: An interconnect for providing data access between nodes of an integrated circuit, comprises a predetermined type of ingress port comprising routing circuitry responsive to a read-triggering request received from a requesting node to select from a selected egress port via which signals are to be routed to a destination node to control the destination node to return at least one read response dependent on data read from a target storage location. In response to the read-triggering request, the routing circuitry obtains a relative data width indication specifying whether read responses received at the selected egress port have a narrower data width than read responses to be provided to the requesting node by the predetermined type of ingress port, and controls allocation of resource for handling the read-triggering request or the at least one read response depending on the relative data width indication.
    Type: Grant
    Filed: December 21, 2017
    Date of Patent: October 8, 2019
    Assignee: ARM Limited
    Inventors: Arthur Brian Laughton, Sean James Salisbury, Chiranjeev Acharya, Eduard Vardanyan
  • Publication number: 20190205276
    Abstract: An interconnect, and method of handling supplementary data in an interconnect, are provided. The interconnect has routing circuitry providing a plurality of paths, and routing control circuitry to use the plurality of paths to establish routes through the interconnect between source devices and destination devices coupled to the interconnect, to enable system data to be routed through the interconnect between the source devices and the destination devices. The system data relates to functional operation of a system comprising the interconnect, the source devices and the destination devices. At least a subset of the paths are redundant paths whose use by the routing control circuitry provides the system data with resilience to faults when routing the system data through the interconnect.
    Type: Application
    Filed: January 2, 2018
    Publication date: July 4, 2019
    Inventors: Andrew Brian Thomas HOPKINS, Sean James SALISBURY
  • Publication number: 20190196990
    Abstract: An interconnect for providing data access between nodes of an integrated circuit, comprises a predetermined type of ingress port comprising routing circuitry responsive to a read-triggering request received from a requesting node to select from a selected egress port via which signals are to be routed to a destination node to control the destination node to return at least one read response dependent on data read from a target storage location. In response to the read-triggering request, the routing circuitry obtains a relative data width indication specifying whether read responses received at the selected egress port have a narrower data width than read responses to be provided to the requesting node by the predetermined type of ingress port, and controls allocation of resource for handling the read-triggering request or the at least one read response depending on the relative data width indication.
    Type: Application
    Filed: December 21, 2017
    Publication date: June 27, 2019
    Inventors: Arthur Brian LAUGHTON, Sean James SALISBURY, Chiranjeev ACHARYA, Eduard VARDANYAN
  • Publication number: 20190163400
    Abstract: Data access routing circuitry 4, 6 is provided for routing data access request to a selected destination node. The data access routing circuitry supports read requests requiring a read response, write requests requiring a write response and at least one type of atomic data access request requiring both a read response and a write response. Resource allocation circuitry 70, 71 is provided to control allocation of resource for handling data access requests which require a read response. The resource allocation circuitry 70, 71 reserves resource for handling the at least one type of atomic data access request and prevents use of the reserved resource 76 for handling read requests.
    Type: Application
    Filed: October 1, 2018
    Publication date: May 30, 2019
    Inventors: Chiranjeev ACHARYA, Sean James SALISBURY, Eduard VARDANYAN, Arthur Brian LAUGHTON
  • Patent number: 10255103
    Abstract: Transaction handling apparatus comprises a response buffer; and tracking circuitry to store data defining each transaction issued by one or more transaction master devices and to control routing of a transaction response to a given transaction either to the response buffer or as an output to the transaction master device which issued the given transaction; the response buffer being configured to access an indicator for each buffered transaction response indicating whether a response has been output by the apparatus for a previously issued transaction, on which that buffered transaction response depends, and to output the buffered transaction response to the transaction master device which issued that transaction when the previously issued transaction has already been output by the apparatus.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: April 9, 2019
    Assignee: ARM Limited
    Inventors: Chiranjeev Acharya, Arthur Brian Laughton, Sean James Salisbury
  • Patent number: 10169236
    Abstract: A cache coherency controller comprises a directory indicating, for memory addresses cached by one or more of a group of one or more cache memories connectable in a coherent cache structure, which of the cache memories are caching those memory addresses; and control circuitry configured to detect a directory entry relating to a memory address to be accessed so as to coordinate, amongst the cache memories, an access to a memory address by one of the cache memories or a coherent agent in instances when the directory entry indicates that another of the cache memories is caching that memory address; the control circuitry being responsive to status data indicating whether each cache memory in the group is currently subject to cache coherency control so as to take into account, in the detection of the directory entry relating to the memory address to be accessed, only those cache memories in the group which are currently subject to cache coherency control.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: January 1, 2019
    Assignee: ARM Limited
    Inventors: Sean James Salisbury, Andrew David Tune
  • Publication number: 20180285145
    Abstract: Transaction handling apparatus comprises a response buffer; and tracking circuitry to store data defining each transaction issued by one or more transaction master devices and to control routing of a transaction response to a given transaction either to the response buffer or as an output to the transaction master device which issued the given transaction; the response buffer being configured to access an indicator for each buffered transaction response indicating whether a response has been output by the apparatus for a previously issued transaction, on which that buffered transaction response depends, and to output the buffered transaction response to the transaction master device which issued that transaction when the previously issued transaction has already been output by the apparatus.
    Type: Application
    Filed: April 4, 2017
    Publication date: October 4, 2018
    Inventors: Chiranjeev ACHARYA, Arthur Brian LAUGHTON, Sean James SALISBURY
  • Patent number: 9977742
    Abstract: A cache coherency controller comprises a directory indicating, for memory addresses cached by a group of two or more cache memories in a coherent cache structure, which of the cache memories are caching those memory addresses, the directory being associative so that multiple memory addresses map to an associative set of more than one directory entry; and control logic responsive to a memory address to be newly cached, and configured to detect whether one or more of the set of directory entries mapped to that memory address is available for storage of an indication of which of the two or more cache memories are caching that memory address; the control logic being configured so that when all of the set of directory entries mapped to that memory address are occupied, the control logic is configured to select one of the set of directory entries as a directory entry to be overwritten and the corresponding cached information to be invalidated, the control logic being configured to select a directory entry to be ove
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: May 22, 2018
    Assignee: ARM Limited
    Inventors: Andrew David Tune, Sean James Salisbury
  • Patent number: 9928195
    Abstract: An interconnect, and method of operation of an interconnect, are provided for connecting a plurality of master devices and a plurality of slave devices. Hazard management circuitry is used to serialize transactions to overlapping addresses. In addition, gating circuitry ensures ordered write observation (OWO) behavior at an interface to one or more of the master devices, the gating circuitry receiving write address transfers of write transactions and performing a gating operation to gate onward propagation of the write address transfers to the slave devices in order to ensure the OWO behavior. The gating circuitry performs the gating operation under control of the hazard management circuitry. Hence, for write transactions that are subjected to hazard checking by the hazard management circuitry, this removes the need to implement any other processes to specifically manage OWO behavior for those write transactions.
    Type: Grant
    Filed: December 4, 2015
    Date of Patent: March 27, 2018
    Assignee: ARM Limited
    Inventors: Andrew David Tune, Peter Andrew Riocreux, Sean James Salisbury, Daniel Adam Sara, George Robert Scott Lloyd
  • Patent number: 9892072
    Abstract: Interconnect circuitry for connecting transaction masters to transaction slaves includes response modification circuitry. The response modification circuitry includes shortlist buffer circuitry storing identification for modification target transaction responses. The response modification circuitry uses this identification data to identify among a stream of transaction responses in transit a modification target transaction response. The response modification circuitry then serves to form a modified transaction response to be sent in place of the modification target transaction response to the transaction master.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: February 13, 2018
    Assignee: ARM Limited
    Inventors: Andrew David Tune, Arthur Brian Laughton, Daniel Adam Sara, Sean James Salisbury, Peter Andrew Riocreux
  • Patent number: 9852088
    Abstract: A system-on-check integrated circuit 2 includes interconnect circuitry 4 connecting a plurality of transaction sources to a plurality of transaction destinations. The interconnect circuitry 4 includes a reorder buffer for buffering access transactions and hazard checking circuitry 46, 48, 50, 52 for performing hazard checks, such as point-of-serialization checks and identifier reuse checks. Check suppression circuitry 62, 64, 66, 68 serves to suppress one or more hazard checks depending upon one or more state variables that themselves depend upon access transactions other than the access transaction for which the hazard checking is or is not to be suppressed. As an example, hazard checking may be suppressed if it is known that there are no other access transactions currently buffered within the reorder buffer 26 or alternatively no other access transactions from the same transaction source buffered within the reorder buffer 26.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: December 26, 2017
    Assignee: ARM Limited
    Inventors: Andrew David Tune, Daniel Sara, Sean James Salisbury, Arthur Laughton, Peter Andrew Riocreux
  • Patent number: 9727466
    Abstract: An interconnect and method of managing a snoop filter within such an interconnect are provided. The interconnect is used to connect a plurality of devices, including a plurality of master devices where one or more of the master devices has an associated cache storage. The interconnect comprises coherency control circuitry to perform coherency control operations for data access transactions received by the interconnect from the master devices. In performing those operations, the coherency control circuitry has access to snoop filter circuitry that maintains address-dependent caching indication data, and is responsive to a data access transaction specifying a target address to produce snoop control data providing an indication of which master devices have cached data for the target address in their associated cache storage.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: August 8, 2017
    Assignee: ARM Limited
    Inventors: Andrew David Tune, Sean James Salisbury
  • Patent number: 9639470
    Abstract: An interconnect has coherency control circuitry for performing coherency control operations and a snoop filter for identifying which devices coupled to the interconnect have cached data from a given address. When an address is looked up in the snoop filter and misses, and there is no spare snoop filter entry available, then the snoop filter selects a victim entry corresponding to a victim address, and issues an invalidate transaction for invalidating locally cached copies of the data identified by the victim. The coherency control circuitry for performing coherency checking operations for data access transactions is reused for performing coherency control operations for the invalidate transaction issued by the snoop filter. This greatly reduces the circuitry complexity of the snoop filter.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: May 2, 2017
    Assignee: ARM Limited
    Inventors: Sean James Salisbury, Andrew David Tune, Jamshed Jalal, Mark David Werkheiser
  • Publication number: 20160350220
    Abstract: A cache coherency controller comprises a directory indicating, for memory addresses cached by one or more of a group of one or more cache memories connectable in a coherent cache structure, which of the cache memories are caching those memory addresses; and control circuitry configured to detect a directory entry relating to a memory address to be accessed so as to coordinate, amongst the cache memories, an access to a memory address by one of the cache memories or a coherent agent in instances when the directory entry indicates that another of the cache memories is caching that memory address; the control circuitry being responsive to status data indicating whether each cache memory in the group is currently subject to cache coherency control so as to take into account, in the detection of the directory entry relating to the memory address to be accessed, only those cache memories in the group which are currently subject to cache coherency control.
    Type: Application
    Filed: April 20, 2016
    Publication date: December 1, 2016
    Inventors: Sean James SALISBURY, Andrew David TUNE
  • Publication number: 20160350219
    Abstract: A cache coherency controller comprises a directory indicating, for memory addresses cached by a group of two or more cache memories in a coherent cache structure, which of the cache memories are caching those memory addresses, the directory being associative so that multiple memory addresses map to an associative set of more than one directory entry; and control logic responsive to a memory address to be newly cached, and configured to detect whether one or more of the set of directory entries mapped to that memory address is available for storage of an indication of which of the two or more cache memories are caching that memory address; the control logic being configured so that when all of the set of directory entries mapped to that memory address are occupied, the control logic is configured to select one of the set of directory entries as a directory entry to be overwritten and the corresponding cached information to be invalidated, the control logic being configured to select a directory entry to be ove
    Type: Application
    Filed: April 20, 2016
    Publication date: December 1, 2016
    Inventors: Andrew David TUNE, Sean James SALISBURY