[U-Boot] Nokia N900: Broken comment after commit 278b90ce (configs: Migrate CONFIG_SYS_TEXT_BASE)

[Pali Rohár]

On Thursday 27 December 2018 13:56:57 Tom Rini wrote:
> On Thu, Dec 27, 2018 at 07:45:15PM +0100, Pali Rohár wrote:
> 
> > Hi! Now I spotted that CONFIG_SYS_TEXT_BASE was moved/removed in commit
> > 278b90ce786f73faf29aa522d5d101e1da006378 from include/configs/nokia_rx51.h
> > file, but comment which described value for that macro is still on old
> > place. See diff:
> > 
> > http://git.denx.de/?p=u-boot.git;a=blobdiff;f=include/configs/nokia_rx51.h;h=c9901e52510110ea34bd1ac6bcdc2a90a9bada8d;hp=6312ed737c7104b331c11c8e88808fcc10654718;hb=278b90ce786f73faf29aa522d5d101e1da006378;hpb=7c8f00e484658c673d32d8422c96cb64bb571063
> > 
> > Tom, can you move also comment to place where is now
> > CONFIG_SYS_TEXT_BASE value for Nokia N900?
> 
> I'm a little confused.  We migrated the value set there to
> configs/nokia_rx51_defconfig where it's still 0x80008000 should it have
> been 0x80400000 ?  But that's not what the code was doing..

I do not know current state of U-Boot loading, but in past there was a
problem with Nokia N900. On N900, U-Boot image is loaded by Nokia's
bootloader at *random* address. And U-Boot needed to be at fixed base
address, therefore for N900 U-Boot low level init, there is a code which
moves U-Boot itself from *random* address to fixed based.

> > Anyway, now I tested in qemu n900 emulator U-Boot version from master
> > git branch and it is still working and able to boot 2.6.28 Maemo kernel!
> 
> Can you update .travis.yml to include running the n900 qemu setup?
> Thanks!

There are 3 problems:

1) It needs Linaro arm version of qemu.

2) It needs proprietary Nokia bootloader.

3) It needs proprietary Nokia tool for creating bootable image for qemu.

Those images and tools probably disappeared from internet, but I still
have copies. License allows me to redistribute them for non-commercial
usage.

IIRC Linaro version of qemu is not available in distributions anymore,
so it would be needed to compile it from sources.

So... makes it any value? And if yes, it is also possible from license /
redistribution point of view?

-- 
Pali Rohár
pali.rohar at gmail.com
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