Providing a trustworthy indication of the current state of a multi-processor data processing apparatus
US9268942B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 12, 2013 |
| Grant date | Feb 23, 2016 |
| Priority date | — |
| Expiry date | Apr 19, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/034
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A data processing apparatus formed on an integrated circuit comprising: a plurality of processors; power control circuitry configured to control power up and power down of the processors; a read only memory for storing boot up software for booting up each of the processors. The power control circuitry is configured to respond to receipt of a check state request, to control one of the processors that is currently powered down to power up and to access the boot up software. The boot up software accessed in response to the check state request controls the processor to perform a measurement indicative of a current state of the data processing apparatus and to output a value indicative of the measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.