From System Design:
"Arm CoreLink System Guidance for Mobile is a collection of resources to provide a representative view of typical compute subsystems that can be designed and implemented using specific generations of Arm IP. These compute subsystems address the expected requirements of a specific segment of the mobile market."
We support the SGM-775 platform as part of the Arm Platform deliverables. SGM-775 is based on Cortex-A75 and Cortex-A55 in a big.LITTLE combination, with the Mali-G72 graphics processor:
Follow the instructions here to fetch and build the latest Arm Platforms deliverables, then follow the instructions here to run the deliverables on your SGM-775 FVP.