Regarding Stm32mp157a_Dk1

[Sindhu Vadde]

We are using stm32mp157a_dk1. we want to know cortex_A7 core0 is in secure or non secure mode? How will come to know processor mode is in secure/non secure? If it is secure how to change it to non secure?

[PatrickF]

Hi,

this is very generic question, mostly related to Cortex-A7 and Linux implementation

For OpenSTLinux security aspects:

https://wiki.st.com/stm32mpu/wiki/Security_overview

https://wiki.st.com/stm32mpu/wiki/Boot_chain_overview#STM32MP15_boot_chain

For Cortex-A7, please have a look to ARM documentations:

https://developer.arm.com/documentation/ddi0464/f/Programmers-Model/Security-Extensions-architecture/System-boot-sequence

https://developer.arm.com/documentation/ddi0406/latest

Regards.

[Sindhu Vadde]

I refereed all the documents but ,i didn't understand that's why i am asking.