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ManthanWankar's avatar
ManthanWankar
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3 years ago

Kernel restart issue while trying to read or write from the address space of hps2fpga and lwhps2fpga

Currently working on a Arria 10 FPGA and faced this issue while trying to access the gpio connected on the lwhps to fpga bridge but when i try to access the lwhps2fpgs address section(0xff200000) my kernel stucks and restarts.

below i have mentioned the bridge device tree

fpga-bridge@ff200000 {
compatible = “altr,socfpga-lwhps2fpga-bridge”;
reg = <0xff200000 0x00200000>;
resets = <0x06 0x61>;
clocks = <0x08>;
bridge-enable = <0x01>;
altr,l3-syscon = <0x99>;
phandle = <0x5b>;
init_val = <1>;

};

fpga-bridge@c0000000 {
compatible = “altr,socfpga-hps2fpga-bridge”;
reg = <0xc0000000 0x3c000000>;
resets = <0x06 0x60>;
clocks = <0x08>;
bridge-enable = <0x01>;
altr,l3-syscon = <0x99>;
phandle = <0x5c>;
init_val = <1>;
};
been following this guide from rocket board: https://www.rocketboards.org/foswiki/Documentation/BuildingBootloaderCycloneVAndArria10
and also can any one please share the correct device tree for fpga2hps and fpgs2sdram bridge device tree node

Configuration

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  • ManthanWankar's avatar
    ManthanWankar
    Icon for New Contributor rankNew Contributor
    3 years ago

    also changed the memory reg value from reg = <0x0 0x40000000> to reg = <0x0 0x80000000> in the uboot dtsi

  • aikeu's avatar
    aikeu
    Icon for Regular Contributor rankRegular Contributor
    3 years ago

    Hi ManthanWankar,


    Your custom board has only memory size changes, I think can change only the memory size for that in the device tree. The rest remain the same as by default the GSRD has considered the bridge enable functionality.


    Thanks.

    Regards,

    Aik Eu


  • aikeu's avatar
    aikeu
    Icon for Regular Contributor rankRegular Contributor
    3 years ago

    Hi ManthanWankar,


    Any follow up with the previous comment?


    Thanks.

    Regards,

    Aik Eu


  • aikeu's avatar
    aikeu
    Icon for Regular Contributor rankRegular Contributor
    3 years ago

    Hi ManthanWankar,


    We do not receive any response from you to the previous question/reply/answer that I have provided. This thread will be transitioned to community support. If you have a new question, feel free to open a new thread to get the support from Intel experts. Otherwise, the community users will continue to help you on this thread. Thank you


    Thanks.

    Regards,

    Aik Eu


  • ManthanWankar's avatar
    ManthanWankar
    Icon for New Contributor rankNew Contributor
    3 years ago

    Hey,

    got it working , upgraded to quartus 23.2 and downloaded the GSRD again, made changes on the lwhps2fpga bridge and had a reset which was mapped from top module to qsys which further was mapped to bridges. that reset was causing the restart issue, solved it .