Hi anonimcs,
The DDR cal require the peripheral.rbf in order for the HPS DDR to up and work.
Can check on the Reducing Arria 10 Fabric Configuration Time section for more info:
https://www.rocketboards.org/foswiki/Documentation/BuildingBootloaderCycloneVAndArria10#Option_351_45_Separate_Configuration_Files
Thanks.
Regards,
Aik Eu