PCIe base address.

Hello all.

I can catch access from PCIe to my BAR. But how I can decode address related to start BAR address of PCIe. If I will make register at 0x1234 from BAR0. Should I sub each PCIe access transaction from BAR address and compare with 0x1234? How I can get BAR address from BAR at PCIe card side? Altera SG dma looks like decode only BAR "Chip select" and first 128 bytes address.