公开(公告)号：US20240241755A1

公开(公告)日：2024-07-18

申请号：US18098334

申请日：2023-01-18

Applicant: Arm Limited

Inventor： Richard Andrew PATERSON ,  Jonathan BAKER

IPC: G06F9/50 ,  G06F9/46 ,  G06F9/54

CPC classification number: G06F9/5033 ,  G06F9/466 ,  G06F9/544

Abstract: An apparatus and method for controlling access to a shared resource accessible to a plurality of initiator components is provided. The apparatus has shared resource management circuitry to select, from amongst the plurality of initiator components, a currently granted initiator component that is currently allowed to access the shared resource, and to identify the currently granted initiator component within a storage structure. Gating circuitry is located in a communication path between the given initiator component and the shared resource which, on receipt of a given transaction initiated by a given initiator component, determines with reference to the storage structure whether the given initiator component is the currently granted initiator component. The gating circuitry is arranged, when the currently granted initiator component is the given initiator component, to allow onward propagation of the given transaction to the shared resource, and is arranged, when the currently granted initiator component is other than the given initiator component, to block onward propagation of the given transaction to the shared resource and to trigger a recovery action to seek to facilitate future handling of the given transaction.

公开(公告)号：US20190073011A1

公开(公告)日：2019-03-07

申请号：US16035884

申请日：2018-07-16

Applicant: ARM Limited

Inventor： Richard Andrew PATERSON ,  Seow Chuan LIM ,  Alessandro RENZI

IPC: G06F1/28 ,  G06F1/32

Abstract: An integrated circuit comprises first and second power domains, and a message handling unit to control passing of messages sent from a sender device in the first power domain to a receiver device in the second power domain. The message handling unit writes messages sent from the sender device to a message storage area, provided in the second power domain. The message handling unit is responsive to a message send request from the sender device requesting sending of at least one message to the receiver device when at least one device in the second power domain is in a quiescent state, to transmit a wakeup request to a second domain power controller to request that said at least one device in the second power domain transitions from the quiescent state to an awake state.

公开(公告)号：US20180309565A1

公开(公告)日：2018-10-25

申请号：US15493429

申请日：2017-04-21

Applicant: ARM Limited

Inventor： Richard Andrew PATERSON ,  Simon CROSSLEY ,  Ramnath Bommu Subbiah SWAMY ,  Steven Douglas KRUEGER ,  Anitha KONA

IPC: H04L7/00 ,  H04L12/26

Abstract: A method for correlating first and second local time counts in first and second integrated circuits is provided. The first and second integrated circuits communicate via a communication network. A separate time control signal path is also provided between the integrated circuits. The method comprises determining a signal propagation latency associated with propagation of a latency determining signal between the integrated circuits on the time control signal path, and correlating the first and second local time counts in dependence on the signal propagation latency and a time correlating signal transmitted on the time control signal path.