cyclone IV GX PCIE

1、QSYS is used to call the PCIE core to communicate with PC, and the PCIE core communicates through the avalon-mm bus and the local interface (self-programmed), which can realize subsequent data reading and writing, and the corresponding address of all data is offset by two digits.

2、I wonder if there is a place to set in the driver.Or maybe I'm using the wrong Avalon bus。

3、here is another possibility. Is there a 2-bit offset in the address of PCIE?