[U-Boot] Reading uninitialized SDRAM values on OMAP4460 (PandaBoard)

[Sricharan R]

On Wednesday 08 May 2013 06:54 PM, An Schall wrote:
> Hi there,
>
> my task is to output the uninitialized SDRAM values over UART during device
> startup.
>
> Therefore, I first searched for the code that handles the SDRAM
> initialization since I have to put my code in front of it. After digging
> through the code and reading some mailing list entries, I guess it takes
> place either in:
>
> arch/arm/cpu/armv7/start.S: after line 159 (after CPU was set to SVC3232
> mode)
>
> or
>
> arch/arm/cpu/armv7/omap-common/lowlevel_init.S (which is quiet confusing to
> me).
>
> I guess it takes place in start.S. If you could confirm this, it would be
> very helpful.ti
>
> Next, I need to configure UART so I can iterate over the SDRAM and put each
> single byte on UART.
>
> Do you have any information where I can find info on how to write ASM to
> configure UART? ARM helpcenter is way too huge to find info in reasonable
> time.
>
> Thanks in advance,
> André
>
>
>
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 If your task is print the the uninitialised EMIF registers, then just
 add prints before the function sdram_init() in s_init

  arch/arm/cpu/armv7/omap-common/hwinit-common.c

Regards,
 Sricharan