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AM5728: How to read pcie data on EP side

Puneeth K
Prodigy 60 points
Part Number: AM5728

Hi,

I have configured my sitara AM5728 processor as endpoint i.e pcie2_ep on dts. This EP is connected to zynqmp  which is configured as root complex.

Now I want to read data on sitara EP side using devmem tool. But when I give "devmem2 0x30000000" command, my kernel is hanging & I am not able to proceed further.

How can read read pcie data on EP side. Please help on this.

Thank you.

  • 0
    Prodigy 60 points

    Hi,

    My Kernel hang problem is solved now. My pci link was not up when I was running devmem command.

    Once the pci link between zynqmp and sitara Am5728 is up, then I can able to run devmem command.

    But how can I do read and write operation in sitara EP using devmem and where can see my pci BAR address in EP. Please help on this.

    Thank you.

  • 0 in reply to Puneeth K
    TI__Mastermind 23125 points

    Puneeth, 

    sorry for the delayed response. on your last question, can you restate the question, as I am not sure if you are trying to find out the PCIe memory map from EP side (?), if so, you can use lspci from RC side to list all exported BAR windows from EP. 

    regards

    Jian