[U-Boot] cpu/arm926ejs/start.S question

Fabio Estevam festevam at gmail.com
Fri Jul 8 02:54:50 CEST 2011


Hi Andre,

On Thu, Jul 7, 2011 at 6:38 PM, Andre Renaud <andre at bluewatersys.com> wrote:
> Hello,
> I am working on an i.MX25 board, and would like to know the recommended
> mechanism for putting code in before the first instruction in the
> executable, but outside the *_spl system.
>
> Basically, the i.MX25 has a smart boot rom in the CPU, which will
> extract the first block, and interpret it (as data, rather than
...

Just to make sure I understand: you want to boot MX25 from internal
mode (from ROM), correct?

We currently do this on the MX51 and we pass the DDR timings, IOMUX,
etc via the DCD (Device Configuration Data) mechanism.

You can refer to: board/freescale/mx51evk/imximage.cfg

I plan to work on adding support for MX25PDK board and I would like to
get it to boot from internal mode (NAND and SD card), but this will
take some time as I will be out for one month.

Would be interested to know whether you get any progress on this side.

Thanks,

Fabio Estevam


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