Qsys memory range

Hello all,

I've been curious why Qsys has kept the 32 bit address range restriction from SOPC builder. In my particular case, I have 16GB of DDR3 I would like to completely map into PCIe. I know about the new address window bridge, but aside from being a bit of a nuisance to switch windows, I can foresee problems with PCIe switch prefetching and returning data from the wrong window. Perhaps thats an unjustified concern since PCIe is supposed to discard any data that isn't immediately consumed, but that reason aside, it still seems like an arbitrary restriction.

-Sean