How do you use the Avalong memory map to interface external memory

I am trying to access data from a DDR4 SDRAM connected to an Arria 10 and store it in a fifo buffer sequentially, and I read that you can use an emif hard memory controller to access the DDR4 memory through the avalong mm interface, but I do not know how I would go about doing it . I am quite new to using FPGAs so any help would be much appreciated.