[U-Boot-Users] u-boot TEXT_BASE relocatable

Wolfgang Denk wd at denx.de
Tue Dec 4 08:27:22 CET 2007

In message <14143068.post at talk.nabble.com> you wrote:
> I have my u-boot for ARM926Ejs...
> And there are two DDR banks. The problem is I want to be able to run u-boot
> from both the banks...

Oops? U-Boot will (if configured properly) map all banks of RAM as a
single contiguous memory area and use it all.

> Reason? I need to do DDR testing (so need to change the offset values at
> times in the control registers of the DDR)...
> So if u-boot runs from Bank A, I can test Bank B, but as soon as I try and
> change control register of Bank A...my system crashes or resets...

Sounds as if you don't present us all information.  Normally,  i.  e.
when  booting from NOR flash, U-Boot does the RAM testing while still
running from flash, i. e. before relocation.

You sound as if U-Boot was not booting from flash  memory,  but  from
some  sort of storage device like NAND or data flash. In this case it
is the responsibility of the bootstrap loader which sets  up  RAM  to
test it before using it.

> ------=_Part_54830_4138933.1196732954043
> Content-Type: text/html; charset=us-ascii
> Content-Transfer-Encoding: 7bit

And NEVER post HTML here.

Best regards,

Wolfgang Denk

DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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