Invention Grant
- Patent Title: Interrupt controller
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Application No.: US17056896Application Date: 2019-05-01
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Publication No.: US11429426B2Publication Date: 2022-08-30
- Inventor: Timothy Nicholas Hay , Martin Weidmann , Michael Alexander Kennedy , Andrew John Turner
- Applicant: Arm Limited
- Applicant Address: GB Cambridge
- Assignee: Arm Limited
- Current Assignee: Arm Limited
- Current Assignee Address: GB Cambridge
- Agency: Nixon & Vanderhye P.C.
- Priority: GB1808587 20180524
- International Application: PCT/GB2019/051211 WO 20190501
- International Announcement: WO2019/224515 WO 20191128
- Main IPC: G06F9/48
- IPC: G06F9/48 ; G06F9/455 ; G06F9/52 ; G06F9/54

Abstract:
An interrupt controller comprises issue circuitry to issue interrupt requests to a processing element and control circuitry to detect presence of a race condition in association with at least one pending interrupt request to be issued, and to set a barrier indicator when the race condition has been resolved. In response to the race condition being present, the issue circuitry is configured to select one of the at least one pending interrupt requests, to issue to the processing element the selected pending interrupt request followed by a dummy request over a path that ensures that the processing element receives the selected pending interrupt request prior to receiving the dummy request. On receiving an acknowledgement indicating that the processing element has received the dummy request, the control circuitry is then configured to set the barrier indicator.
Public/Granted literature
- US20210271512A1 INTERRUPT CONTROLLER Public/Granted day:2021-09-02
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