TDA2SA: About DDR Memory change Issue

Part Number: TDA2SA

Hi SIr 

We used TDA2 for development and we change the DDR P/N and size (512MB).

Where should we modify about DDR timing setting and memory size setting ? 

As we know , we should modify SBL first. 

Do we need to modify other parts to let system can boot successfully and work well. ( for example : where to modify size for app image) 

please advise 

BR

Yimin