Terasic DE4 - SDRAM 4GB IP sample

Hello there,

I have a Stratix board Terasic DE4 and want to run SDRAM 4GB that I have. But I couldn't find any information, or sample to use SDRAM in Qsys or SOPC. I have DSL 4GB brand name. Do I need to buy IP for this SDRAM?

Best,
Sean