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Petalinux How to add a custom FSBL?

wernerfs

Hi everyone.

I am currently quite familiarized with the basic petalinux workflow. 

I can say proudly that Ubuntu is running on a custom MPSoC board, but this is not enough. I need to find a way to modify the Petalinux FSBL to include the initialization of a missing peripheral. I have read the guide where it says that a patch should be used to alter the FSBL. Sadly, I am unfamiliar with patches, and from what I understand they only allow modifying the code in a file. I need to add more sources and alter the content on the xfsbl_hooks.

Thanks.

  • Why don't you check out YouTube to get some assistance?

  • in reply to KellyGreene

    Thanks, I have checked online on several sites but the flow is just not clear enough. I took the xsa file from vivado and built a new platform project in Vitis indicating that the targeted os is linux. After this, I loaded the bif and root files from my previous linux implementation and let Vitis generate the boot components.

    Once I had the fsbl sources I modified them and built the platform project. I got the "fsbl.elf". I went to my petalinux project and disabled the FSBL from the linux components in the configuration, and rebuilt the project. Finally, I packaged the project with the vitis FSBL. I added the files to the SD card and turned on the board. The result was nothing. 

    Anyways, I will try to do everything without using the old bif file which points to the wrong files. I don't think changes in the FSBL mean changes in the PMU.