[meta-xilinx] SPL->ATF->Linux

[Jean-Francois Dagenais]

Hi guys,

Is this possible? I am shooting for fastest boot possible and thought this would be the way to achieve it. What is the smallest cost I have to expect for having u-boot proper in the boot flow? I.e. is my assumption that I must skip it to achieve fastest boot true.

FYI, I've decided to postpone fpga load to linux init. This simplifies things a bit in SPL, but there is still the mix of ATF and Falcon which I am not sure. I am fuzzy on the ATF terminology so thank you for bearing with me as I learn.

Can anyone point to a working example (board config .h and defconfig files for example) or which pieces are required to make it work. 

I found this on arm-community: "Solved the problem. U-Boot SPL copies ATF in OCRAM, and ATF calls Kernel directly passing in the FDT address."

BTW, we boot both SD and eMMC on the same board. Right now I got my SPL to open a FIT image made by kernel-fitimage.bbclass but it obviously doesn't go far.

But its still a bit vague. If I have to guess, the FIT image would describe to load the kernel at an address which also appears in my dts/dtb so ATF knows where to jump to next.

Thanks for clues an pointers fellas!