公开(公告)号：US11314648B2

公开(公告)日：2022-04-26

申请号：US15427421

申请日：2017-02-08

Applicant: ARM Limited

Inventor： Michael Filippo ,  Jamshed Jalal ,  Kias Magnus Bruce ,  Alex James Waugh ,  Geoffray Lacourba ,  Paul Gilbert Meyer ,  Bruce James Mathewson ,  Phanindra Kumar Mannava

IPC: G06F12/0862 ,  G06F12/0831 ,  G06F12/0811 ,  G06F15/78 ,  G06F11/34

Abstract: Data processing apparatus comprises a data access requesting node; data access circuitry to receive a data access request from the data access requesting node and to route the data access request for fulfilment by one or more data storage nodes selected from a group of two or more data storage nodes; and indication circuitry to provide a source indication to the data access requesting node, to indicate an attribute of the one or more data storage nodes which fulfilled the data access request; the data access requesting node being configured to vary its operation in response to the source indication.

公开(公告)号：US11221951B1

公开(公告)日：2022-01-11

申请号：US17028248

申请日：2020-09-22

Applicant: Arm Limited

Inventor： Abhishek Raja ,  Kias Magnus Bruce ,  Albin Pierrick Tonnerre

IPC: G06F12/00 ,  G06F12/0802 ,  G06F3/06

Abstract: A tag check performed for a memory access operation comprises determining whether an address tag associated with a target address of the access corresponds to a guard tag stored in the memory system associated with a memory system location to be accessed. A given tag check architecturally required for a tag-checked load operation can be skipped when a number of tag-check-skip conditions are satisfied, including at least: that there is an older tag-checked store operation awaiting a pending tag check, for which a guard tag checked in the pending tag check is associated with a same block of one or more memory system locations as a guard tag to be checked in the given tag check; and that the address tag for the tag-checked load operation is the same as the address tag for the older tag-checked store operation.