Thanks to all who responded earlier, we have advanced in our understanding.
Just to be clear, after configuring the PCIe, simply writing or reading the the appropriate address in the DSP memory space will trigger the PCIe address translation mechanism, correct? This seems to be what is happening in the PCIe sample project (PCIE_evmc6657_wSoCFile_C66BiosExampleProject).
Also, using DMA as the mechanism works as well? I see what looks like an edma transfer test in that code as well.
Thanks for patiently answering my questions, we are just getting ramped up on this technology.