How to Run Custom U-Boot or Bare-Metal Program on Qbox

[alpha-beta-user]

This work is so handsome.

Now I want to run my own generated U-Boot or bare-metal program on Qbox. Is this feasible? What should I pay attention to when doing this?
Currently, I tried running my custom U-Boot program, and I observed (via QEMU's -d exec option) that after executing the first instruction, it directly jumps to address 0x200. Could you please help explain what might cause this behavior?

[markfoodyburton]

Typically that's an undefined instruction, or your trying to execute e.g. an EL3 instruction while at EL1. If you need EL2 or 3 support, make sure to add has_el2 or has_el3 to your cpu configuration.