[U-Boot-Users] Question about uboot environment variables and setting uboot in the parallel flash

Wolfgang Denk wd at denx.de
Mon Jun 12 11:03:26 CEST 2006


in message <448B71A2.70507 at randrlabs.com> you wrote:
> I wander, if I could ask you a question Wolfgang.

Of course you can. You just did.

> I am trying to load uboot 1.1.4 directly into a parallel flash on a 
> board similar to 91rm9200ek. I have written a driver, and the loading to 
> flash occurs perfect without errors.
> However, I have a problem, after the board resets. Once uboot 1.1.4 
> loads, it crashes. I believe that the Environment variables are being 
> saved and overwritten by uboot. I am experiemnting with settings, but I 
> don't know the solution yet.

U-Boot does not automatically write to flash memory, only  on  behalf
of user commands.

> Here is what I do:
> Load uboot into ram
> Execute uboot from ram
> Load uboot into flash

This is a different image of U-Boot, one configured correctly (i.  e.
for booting from flash)? Otherwise see the FAQ:

> Reboot
> Uboot loads to prompt and crashes

Well, debug the code. Obviously your port / configuration is broken.

> Sorry to bug, but I don't have anywhere else to go,

Well, you *also* posted on the mailing list. 

Best regards,

Wolfgang Denk

Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Syntactic sugar causes cancer of the semicolon.
                - Epigrams in Programming, ACM SIGPLAN Sept. 1982

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