Dear Dmitry,
In message 846497610.1234947971.54288136.73867@mcgi74.rambler.ru you wrote:
I've a board quite similar to AT91RM9200DK. I've compiled U-Boot 1.1.2 and 1.3.4 for it and both work fine with images loaded via tftp. When I try to boot same images from flash I got kernel running fine until this: ... No filesystem could mount root, tried: ext2 cramfs vfat romfs Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0)
Yes, that's a know limitation (or call it feature, or bug, as you like) of the ARM kernel.
Seems like initrd is not copied to RAM by U-Boot.
No, of course it is not copied. Why should we copy the compressed image to ram? That's just a waste of CPU cycles. The kernel can read it from flash as well.
Patches for this problem were submitted a few times since kenrel version 2.4.17 or so, and posted and re-posted again and again here on the ML. Search the archives for details.
What am I missing?
You're running on ARM...
Best regards,
Wolfgang Denk