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

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

[Jayant Chauhan]

Hey fellas,
I am in a fix...and am a newbie...
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...

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...
So I want to somehow use offsets to be used by the linker...
Is that possible? And can nething be done to TEXT_BASE value in CONFIG.MK
file to do this ?

thanks alot in advance guys

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

[Wolfgang Denk]

In message <14143068.post@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
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And NEVER post HTML here.

Best regards,

Wolfgang Denk

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