NIOS V/g - peripherals under 2GB Peripheral Region

Hello,

I am trying to clarify the information provided in the following KB:

Why are the peripherals under 2gb peripheral region still cached by the NIOS V/g

Does the above KB recommends to have non-cacheable peripheral regions above the 2GB address - that is, non-cacheable space starts from address 0x80000000, or any address above that?

Thank you,

D.