How can I create a dual boot system with DIGI evalboard ConnectCore 6ul sbc pro?

Hi

I want create a dual boot system with DIGI evalboard ConnectCore 6ul sbc pro.
The image for dual boot should be the core-image-base on the NAND FLASH.

  • How can I use the DIGI ‘update-firmware’ service for such a dual boot (because the swupdate service is not accessible directly)?
  • How do I have to change the existing sw-description file?
  • How do I have to change the existing preinstall-swu.sh?
  • How do I have to change the existing swu.inc?
  • Do I have to change U-Boot or any Partition tables?

Regards
Michael