Interrupt controller utilising programmable priority values
US7506091B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 2006 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Apr 5, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/26
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An interrupt controller 2 is provided with priority registers 6 storing priority values P0-P9 used to determine prioritisation between received interrupt signals I0-I9. A priority value accessing circuit 10 provides multiple mappings to the priority values stored in dependence upon the priority value manager 16, 18, seeking to make an access. In this way, a first priority value manager 18, such as a secure operating system, can be given exclusive access to the highest priority values whilst a second priority value manager 16, such as a non-secure operating system, can be given access to a range of priority values as stored which are of a lower priority and yet as written or read by the non-secure operating system appear to the non-secure operating system to have a different, such as higher, priority level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.