I have a AM65x EVM board. I want to develop secure boot by optee. i have some questions following :
1. how about the develop steps for secure boot feature in this board ?
2. how to write key in eFuse ?
3. how to write key in development status, you know the eFuse just can write one time, but I will write many times key in development status
4. secure boot is singed the firmware or encrypt firmware ?