Interrupt controller
US11429426B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2019 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | May 1, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2009/45591
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.