initrd problem with device tree

initrd problem with device tree

[John Linn]

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I realize I'm asking below about u-boot, but I'm really trying to better
understand how initrd should work with device trees.  I have also posted
a question to the u-boot user group.

 

When I build the device tree blob into the kernel image and load the
kernel image with my probe, it finds the initrd fine just using
root=/dev/ram and with the kernel configured properly.

 

With the same kernel configuration, when I run with u-boot, the only way
for the kernel to find the initrd is to put linux,initrd-start and
initrd-end in my device tree. I found these items in an old patch from
David Gibson and I'm not sure if or when they should be used.

 

I also notice in booting-without-of.txt, off_mem_rsvmap, but it's not
clear if and how I should be using it to help the problem.

 

Thanks,

John

 

 



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