How to boot u-boot with EL1 on LX2160

[m_kei]

Currently, we are developing on LX2160Ardb.

According to the "Layerscape Software Development Kit User Guide", the lx2160ardb has a "Boot flow" called TF-A, in which BL31 boots U-Boot at EL2. In this flow, BL31 boots U-Boot on EL2.

I want to boot U-Boot in EL1, do I need to change BL31 for this? Do I need to change BL31 or BL2?
Also, is there any documentation that explains the method?

[yipingwang · Accepted solution]

I discussed with LSDK development team.

First you need to modify BL31, maybe you also need to modify u-boot, no need to modify BL2.

We don't have this kind of document, we never have this kind of requirement previously.