Freescale Semiconductor,inc.

Nxp USA, Inc.

Glen G Wienecke

Lawrence Loren Case

Rodney D Ziolkowski

Simon Gallimore

Mingle Sun

Charles E Cannon

Chongbin Fan

Asim A Zaidi

Fareeduddin A Mohammed

A resource domain controller in a data processing system stores information that is used to group various resources, such as bus masters and peripherals, into common domains. Each group can be referred to as a resource domain and can include one or more data processor and peripheral devices. The resource domain information is then used to determine whether a particular access request from a data processor is authorized to access its intended target, e.g., one of the peripheral devices, by determining whether the access request and the intended target each belong to a common resource domain. If so, the access request is allowed, otherwise the access request is prevented from being successfully completed.

Resource domain partioning in a data processing system

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.

Systems and methods for secure boot ROM patch

Growing community of inventors

Fredericksburg, TX, United States of America

Glen G Wienecke