Hi,

On 11 March 2014 05:39, Thilo Cestonaro thilo@cestona.ro wrote:

Hey!

When I build my Uboot with the CONFIG_OF_SEPARATE set to gain access to the compiled dtb, Uboot can't find my concatenated dtb during the boot. After injecting the pulbic keys for the verified boot, I cat the u-boot.dtb behind the u-boot.bin. After that I mkimage the u-boot.img as usuall.

I found, that if I change the offset where the fdt_blob is searched for by +300, it finds the dtb correctly. Like this:

---

#elif defined CONFIG_OF_SEPARATE /* FDT is at end of image */

•   gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE);
  

•   gd->fdt_blob = (void *)(_end_ofs + _TEXT_BASE + 300);
  

#endif

But I can't explain why this might be. The 300 isn't a random value! I calculated it via some debug output and it works reliably. But like it is with these workarounds, I don't like them! So I'm searching for an answer.

Any ideas, why the offset is not _end_ofs + _TEXT_BASE, like it should be?

I just saw this now. You probably already know the outcome, but for the record, commit 8974292 added a check for this problem, and it was fixed for TI boards. Specifically for the Beaglebone, see doc/uImage.FIT/beaglebone_vboot.txt for a walk-through.

Regards, Simon