I am working on DMA connection between Xilinx FPGA and PC over PCIe. However, the DMA transfer from FPGA to Computer doesn't work. I dumped the PCIe package sent by FPGA via ChipScope:
(header)0x6000_0002,0x0600_01FF,(Address)0x0000_0000,0x3740_0000,(data)0x0000_0001,0x0000_0002
which should write 0x1,0x2 to memory address 0x3740_0000, but the write didn't happen. On the other hand, the read from the same address worked perfectly. I have tried both the 32bit and 64bits address, none of them could be succeed. The computer I am working on is an AMD 64bit machine. what did I miss?