[U-Boot] Is running another .scr file from within boot.scr possible?

[U.Mutlu]

U.Mutlu wrote on 04/07/2019 08:05 PM:
> Hi,
> is it possible to exec another .scr file from within boot.scr ?
> Or is there another alternative to auto-run a different script file?
>
> The goal is to have different script files, one say for normal boot from SD,
> and the other say for booting from a tftp-server.
>
> Btw, is the interpreter that runs the boot.scr a sh/bash interpreter?

Another question is:
once boot.scr is started, is it still possible conditionally or 
unconditionally to return to the u-boot CLI prompt?