Method and apparatus for delegation of secure operating mode access privilege from processor to peripheral
US7827326B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2007 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Jun 19, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/74
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a processing system comprising a processor and a plurality of peripherals coupled to the processor, access privileges of a secure operating mode of the processor are delegated to at least a given one of the peripherals. The given peripheral is configured to store, in a secure portion of that peripheral, state information indicative of the processor being in a secure operating mode. The given peripheral is further configured to utilize the stored state information to allow the given peripheral to access at least one resource that is accessible to the processor in the secure operating mode but is not otherwise accessible to the given peripheral. The processing system may comprise, for example, a system on a chip, wherein the processor and peripherals are combined into a single integrated circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.