[U-Boot] Run U-boot from Flash!

[U-Boot] Run U-boot from Flash!

[manojatl]

Hi,

We are in the process of porting linux to our custom board. We are using
u-boot-1.1.6 as bootloader. We are able to successfully port u-boot in RAM
to our custom board. But we want to run the u-boot from flash. We understand
that u-boot is capable of relocating the code from flash to ram. But we
didn't find any idea for changing the address of '_start', which is always
loaded with TEXT_BASE address. 
Expecting a postive response. 

Thanks 
Manu
 


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[U-Boot] Run U-boot from Flash!

[Stefano Babic]

On 06/24/2011 03:53 PM, manojatl wrote:
> 
> Hi,
> 

Hi,

> We are in the process of porting linux to our custom board. We are using
> u-boot-1.1.6 as bootloader.

Before you waste your time: make a pleasure to yourself and update to
the last U-Boot code, better from GIT repository (git.denx.de). Your
version is so old that it is quite difficult to find someone remembering
details about it.

> We are able to successfully port u-boot in RAM
> to our custom board. But we want to run the u-boot from flash. We understand
> that u-boot is capable of relocating the code from flash to ram.

You have not indicated which architecture you have (ARM,PPC, ...), and
from which board you are basing your porting.

> Expecting a postive response. 

Start using last code and check again if you have relevant issues.

Best regards,
Stefano Babic

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=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80  Email: office at denx.de
=====================================================================

[U-Boot] Run U-boot from Flash!

[Wolfgang Denk]

Dear manojatl,

In message <31920053.post@talk.nabble.com> you wrote:
> 
> We are in the process of porting linux to our custom board. We are using
> u-boot-1.1.6 as bootloader. We are able to successfully port u-boot in RAM

First, U-Boot 1.1.6 is more than 5 years old and only of interest to
paleontologists - like a dinosaur.  I tmakes absolutely no sense
putting any efforts n such old code.  Please do yourself (and us) a
favour and use current code (i. e. v2011-06-rc3 or later).

> to our custom board. But we want to run the u-boot from flash. We understand
> that u-boot is capable of relocating the code from flash to ram. But we
> didn't find any idea for changing the address of '_start', which is always
> loaded with TEXT_BASE address. 

Then just change the setting of TEXT_BASE as needed.

Note that it would have been helpful if you had mentioned which
architecture / CPU / board you are talking about.

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
If you're out of tree, you don't exist.
     - David Woodhouse in <1304620350.2398.29.camel@i7.infradead.org>