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DPaul4's avatar
DPaul4
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7 years ago

Error while loading rbf file from linux with overlay method

We are trying to load rbf using linux as per the method referenced in this blog https://forum.rocketboards.org/t/load-fpga-rbf-from-device-tree-overlay-example/999/17 However we are getting the be...
FawazJ_Altera's avatar
FawazJ_Altera
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7 years ago

The Linux will not boot if FPGA is not configured. This is due to the dtb file. It has some drivers that are loaded by kernel. if anything wrong happens to the FPGA, the kernel will break. The recommended flow would be using the generic dtb (which has only the HPS related stuff). Once linux is booting, you can overlay the custom dtb (where it has information about the FPGA image, FPGA IPs, and drivers needed for Linux).

Thanks

  • DPaul4's avatar
    DPaul4
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    7 years ago

    We used the linux image downloaded from the terasic website (Linux Console (kernel 4.5)).

    https://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&No=1046&PartNo=4

    When we look into the ./arch/arm/boot/dts/socfpga.dtsi file the node mentioned in overlay is present.

    base_fpga_region: base-fpga-region {

    compatible = "fpga-region";

    fpga-mgr = <&fpgamgr0>;

    #address-cells = <0x1>;

    #size-cells = <0x1>;

    };

    any other idea how to debug?