hps in qsys

Hello.

Somebody enlighten me about the use of hps in qsys.

When I add hps in qsys, I need to specify the ports, that are connected to the memory, and its parameters. Do I understand correctly that this is necessary to possible use hps memory in fpga (using fpga2hps sdram)? if not, what does it do? And if so, how to avoid these settings if I do not plan to use this feature. Thanks.