[U-Boot] Zynq Zybo booting with mainline U-Boot

[Masahiro Yamada]

Hi Simon,


On Mon, 2 Feb 2015 22:00:25 -0700
Simon Glass <sjg at chromium.org> wrote:

> Hi,
> 
> I have one of boards and would like to get mainline U-Boot booting on it.
> 
> I have followed the instructions for creating a BOOT.BIN file comprised of:
> 
> - boot.elf
> - .bit file
> - u-boot.elf
> 
> and putting it on a a micro-SD card.
> 
> This works OK with the diligent master branch from github. I can boot normally.
> 
> However this is 2013.10. Mainline U-Boot uses device tree so
> presumably the elf file does not work. I expect we need to use
> u-boot-dtb.bin.
> 
> However since this is not an elf file I'm not sure how to build the
> image using the 'Create Zynq Boot Image' tool.
> 
> I don't see any instructions in REAME.zynq about how to create an SD card.
> 
> Any pointers please?
> 


I have a Zynq ZC706 board.

The follwing is what I tried to run u-boot mainline.


I hope it will work for Zybo board, too.


[1] If you are using Xilinx hardware tool (Vivado or ISE)
    you can generate  ps7_init.[ch] or ps7_init_gpl.[ch].

    Copy the C file and the header into borad/xilinx/zynq directory


[2] Build

    make zynq_zybo_defconfig  && make


[3] Download the python script to generate boot.bin

   git clone git://github.com/Xilinx/u-boot-xlnx.git

    Copy  tools/zynq-boot-bin.py   to  ~/bin  or somewhere you like



[4] Generate boot.bin

zynq-boot-bin.py -o boot.bin -u u-boot/spl/u-boot-spl.bin


[5] Copy  boot.bin and u-boot-dtb.img  to your SD card




Please give it a try.

The problem about the instruction above is FPAG bit file is not loaded.



Another way instead of [4] might be:


Describe foo.bif as follows

image:
{
        [bootloader]fsbl.elf
        fpga.bit
        [load=0x04000000,startup=0x04000000]u-boot/u-boot-dtb.bin
}

and 
$ bootgen -image foo.bif -w on -o boot.bin





I have not working on Zynq these days.
I hope Michal can support us.





Best Regards
Masahiro Yamada