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Microzed booting with uboot-spl! NO FSBL!

Former Member

I've been able to get the microzed booting using the U-boot secondary bootloader system. I plan on getting it running on the zedboard next week.

This is completely open source, and doesn't use any of that FSBL nonsense.

This u-boot builds boot.bin and u-boot.img. Now boot.bin loads a u-boot.img file on the MMC card.


https://github.com/vxmdesign/u-boot-xlnx

I have a buildroot distro using it now. You can find it on my zynq page.

http://www.vxmdesign.com/zynq.html

-Chris



  • 0

    What about using the .bit files on the SPI ?

    Does that still work the same ? In the past I've used the Xilinx FSBL with my own u-boot and bitstream files, so that I could flash the SPI. How does that work if you don't use the FSBL ?

  • 0 in reply to Former Member

    I put a copy of my output artifacts on my website.
    http://www.vxmdesign.com/zynq.html
    (Towards the bottom of the page, but just posted, so it might take a few hours for akamai propagate it)
    You should be able to put those on an sd card and boot the system and try out loading bit files and the spi interface.

    I don't have the hardware infront of me right now, so I can't test it, but I would guess my uboot can load bit files and load the qspi.

    So, Xilinx supports loading the bit files from the fsbl, u-boot, and in linux. The default card image from this website loads the bit files from uboot.

    In my projects I don't load bit files in u-boot and have I not tried to access the qspi. However, my u-boot.img should be basically a stock Xilinx u-boot, so what works on there should work on mine. I have noticed a few subtle changes, so there might be bugs I haven't seen. If it doesn't work, please send me an email (on my website). I'd like to know about it.

    Just FYI:

    My distro will not:
    Load the images in the spl boot.bin. This isn't impossible, and if someone wants to figure it out they can. I know some applications want the fpga loaded within a few milliseconds of power being turned on. If you need that, you'd have to stick with the fsbl.
    My distro will not boot from qspi. It is a bit of work to make this work.

    Both of those things are possible. I just don't have the time to do it, and it isn't needed for my projects so I have no plans to support them right now.

    Good luck!
    -Chris