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From: Sricharan R <r.sricharan@ti.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] Reading uninitialized SDRAM values on OMAP4460 (PandaBoard)
Date: Thu, 9 May 2013 18:29:43 +0530	[thread overview]
Message-ID: <518B9DBF.6010600@ti.com> (raw)
In-Reply-To: <CAKz=uXFRRAnwuoQ0A4u6=oS5Q=U_2ATYxDk5SupzyXA0S-cT0Q@mail.gmail.com>

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,
> Andr?
>
>
>
> _______________________________________________
> U-Boot mailing list
> U-Boot at lists.denx.de
> http://lists.denx.de/mailman/listinfo/u-boot
 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

  reply	other threads:[~2013-05-09 12:59 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-08 13:24 [U-Boot] Reading uninitialized SDRAM values on OMAP4460 (PandaBoard) An Schall
2013-05-09 12:59 ` Sricharan R [this message]
2013-05-17  8:01   ` André Schaller

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