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Additional function execute command for secure C6748

Good day experts,

I am currently working on a PC application, which more or less does the same thing as TI's Secure UART Host, in order to boot applications over UART0 for the secure C6748.

I have been using a serial port monitoring program to see how various boot commands are sent between the Secure UART Host and the secure ROM bootloader of the C6748. I am aware that some of the boot commands differ or are not present for the secure ROM bootloader, but I can't seem to find information on some of the new commands. In particular, a unknown Function Execute Command (0x5853590D). Once the secure ROM bootloader ACKs the command, the function index and argument count is specified (as for the non-secure case). In this case:

- Index = 0x0B (11)

- Argument count = 0x04

I cannot find any information on this particular pre-defined ROM function. What does it do? Can you please provide me with some more documentation?