[maemo-leste] Broken u-boot on n900 hw (possibly CONFIG_POSITION_INDEPENDENT)

[Sicelo]

On Sun, Oct 09, 2022 at 09:33:17PM +0200, Pali Rohár wrote:
> Hello!
> 
> Current u-boot from master branch does not work on n900 hw. It does not
> show anything on display, there just nokia logo.
> 
> In qemu it is working fine and all tests are passing. Also in qemu is
> display working without any problem.
> 
> Could you help me to debug it? Maybe something is printed to serial
> console? Or maybe serial console could be used for printf-debugging?
> 
> I just figured out that disabling CONFIG_POSITION_INDEPENDENT u-boot
> option make it working again. But it requires to restoring older version
> of lowlevel_init.S file which does not depend on POSITION_INDEPENDENT:
> 
>     git checkout 7c4ad9821758f98db127e9d6864671c906c02d3b -- board/nokia/rx51/lowlevel_init.S
> 
> And also setting CONFIG_SYS_TEXT_BASE=0x80008000 (to some value in RAM).

Hi

I have a really crude serial console setup in place now, but very little
time, and even less experience with u-boot. I should be able to do the
tests for you on Saturday night (UTC+2). Perhaps over IRC might be a
good idea, in case I need some hand-holding, and if you still need the
help by then.

Regards
Sicelo