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

[An Schall]

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.

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