Patent · US Active

Systems and methods for secure boot ROM patch

US9471785B2 · kind B2 · utility

4Cited by

4References

13Claims

0Family size

Assignee

Freeescale Semiconductor, Inc. · US

Inventors

Asim Abbas Zaidi · Austin, US
Chongbin Fan · Shanghai, CN
Fareeduddin A. Mohammed · Austin, US
Mingle Sun · Shanghai, CN
Glen G. Wienecke · Fredericksburg, US
Rodney D. Ziolkowski · Del Mar, US

Key dates

Filing date	Aug 30, 2013
Grant date	Oct 18, 2016
Priority date	—
Expiry date	Sep 5, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG06F21/572
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A data processing system includes a boot read only memory (ROM) configured to store boot code; one time programmable (OTP) storage circuitry configured to store patch instructions; a random access memory (RAM); and a processor coupled to the boot ROM, the OTP storage circuitry, and the RAM. The processor is configured to: in response to a reset of the data processing system, copy one or more patch instructions from the OTP storage circuitry into the RAM, and during execution of the boot code, execute a patch instruction from the RAM in place of a boot instruction of the boot code.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.