[U-Boot] loading via jtag

[E Robertson <e.robertson.svg@gmail.com>]

On Thursday 02 July 2009 02:22:16 am Frank Svendsb?e wrote:
> On Thu, Jul 2, 2009 at 6:10 AM, E Robertson<e.robertson.svg@gmail.com> 
wrote:
> > Hi All,
> > Has anyone used the JTAG like the BDI2000 to load u-boot onto a
> > at91sam9263? I've done it on other boards but some some reason the
> > code will not execute
> > from on board SDRAM. To avoid initializing the external memory via
> > jtag, I use the bootstrap code to do the setup then load u-boot and
> > run it.
> > For reason(s) I haven't figured out yet, the code will not external
> > memory. Has anyone done this before and can provide some help?
> > Thanks.
>
> How come you want to execute it from RAM? Is the board without flash?
> Could you instead replace the "bootstrap" loader with U-Boot?
>
> It the SDRAM controller is already setup, I guess you must recode U-Boot
> and tell it not to touch/re-initialize the memory controller...
>
> Btw, look at
> http://www.denx.de/wiki/view/DULG/CanUBootBeConfiguredSuchThatItCanBeStarte
>dInRAM
>
> - Frank


In this case, I believe things are a bit different. U-boot is not relocated 
because the bootstrap already does this and the bootstrap does all the init 
needed to set up ram (among other things). I'm tracking a problem which is why 
I'm trying to run it from ram. I've done quite a bit of modifications to the 
point where I believe this should work, but apparently I may have overlooked 
something.