Redirection of interrupts to microprocessors
US5428799A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | May 27, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A redirector in either software or hardware can is used to distribute global interrupts among all processors of a multiprocessor (MP) system, which may have multiple architecturally-isolated buses. When redirecting interrupts using software, a default processor receives all interrupts and redirects them to destination processors. When redirecting interrupts using hardware, a discrete redirector in hardware forwards all interrupts to particular processors based on a routing, or look-up, table. Another implementation incorporates interrupt snooping with either software or hardware interrupt redirection where interrupt response is critical for I/O cards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.