Custom FIFO read in Nios IDE

I created a custom fifo in sopc builder and i am trying to read data from fifo. However, i got no idea about how to manipulate it .Is it right if i make a pointer which points at the base address of the fifo ?

As i am a starter in FPGA & NIOS,or maybe my question is so simple, i would be so appreciate if some give some advice when i meet this kind of problem...
Thanks.