If the processor is in Hypervisor mode (Firmware behaviour after 2/10/2015) then Ultibo switches it to Supervisor mode during initial boot.

If the processor is in Hypervisor mode (Firmware behaviour after 2/10/2015) then Ultibo switches it to Supervisor mode during initial boot.

   

   

If the configuration option RPI3_SECURE_BOOT is set to 1 then Ultibo switches the processor back to Secure world during initial boot (see note below).

If the configuration option ARMSecureBoot is set to 1 then Ultibo switches the processor back to Secure world during initial boot (see note below).

   

   

Ultibo then switches the processor to System mode for all operations and remains in either the Secure or Non Secure World as per the option above.

Ultibo then switches the processor to System mode for all operations and remains in either the Secure or Non Secure World as per the option above.

Secondary cores also switch back to the Secure world using the same technique however they do not need to install the new SMC vector and instead use the one installed by the primary core.

Secondary cores also switch back to the Secure world using the same technique however they do not need to install the new SMC vector and instead use the one installed by the primary core.