Re-build linux-xlnx , u-boot for Pynq Z1

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1

Hello

I wanted to change some kernel configuration and re-build (cross compile) linux kernel. My target board is Pynz Z1.

I have followed simpler steps in this post. I successfully could get uImage. The article provides boot.bin and devicetree.dtb. I used these files along with uImage.

However, everytime I boot the board using SD Card, the boot process freezes after the kernel message “Starting kernel…”. Am I missing something in this kernel re-build process.

I really appreciate any help. Thanks.

2

It looks like the device tree has some issues. Not sure where you got the dtb file, but it is possibly not compatible with Pynq z1.

I am not sure why you want to rebuild the linux kernel since if you are using our sdbuild process, the petalinux project should just have everything - kernels, fsbl, u-boot, etc. What are you trying to do?

3

Thank you very much for the reply. I have not gone through the sdbuild flow. I have taken linux-xlnx, configured and built to get uImage.

I need to enable the kernel configuration CONFIG_DEBUG_INFO during the build, which is disabled in the default kernel image I downloaded from pynq.io.

4

Ok, so the best way to enable that kernel configuration, is to adjust that kernel configuration, and rebuild the boot_files using the SD make flow. Something like

  1. Change kernel configurations in PYNQ/pynq.cfg at master · Xilinx/PYNQ · GitHub

  2. Rebuild the boot file only.

    make boot_files BOARDDIR=<your_board_folder>

After this you will see the boot files in sdbuild/boot and you need to replace the boot files in your SD card partition.

2 Likes
5

Thank you so much! It worked!