Assigning pin config from Delfino F28375S C28x to External memory device

Hii,

      I'm a beginner. I would like to know, how to interface my Delfino F28375S C28x mc to the external memory device which has only 8 address pins, and here controller(with EMIF) which consists of maximum 22 address pins, is it possible to assign remaining address pins as GPIOs in my mc?

Thanks in advance....