Hi,
When i power on a ARM cortex A57, How many of the 4 Exception levels will be supported?
How can i set such that only exception levels EL0 and EL1 are supported in my program? How can i activate each exception levels?
I have to set it such that normally the app should work on EL0 and when an exception occurs, it should go to EL1. How can i do that?
regards,
Ajeesh
AFAIK, interrupts/exceptions in EL0/EL1 go to the vector table which belongs to the current state.
You can define, if exceptions in EL1 go up to EL2/EL3.
But I would not recommend to stay in EL2/EL3 but rather switch to EL1 which is similar to the SYS/SVC mode on ARMv7-A.