I used the adsp-sc5xx_ez-kit evaluation board to verify that the second-stage loader function，and it can work properly.
I referred to the demo(SC573_SSL.zip) in the url. ADSP-SC572 Second stage loader won't boot main app with ad-_rom_boot()
However, our product uses the ADSP-21573, so I transplanted the code from the SC573_SSL project to the ADSP-21573 project and it did not work properly.
Could you please provide SSL project for adsp-21573?