[U-Boot] Linking some code to internal SRAM instead of SDRAM

[Wolfgang Denk]

Dear Alexander Stein,

In message <201006161018.48802.alexander.stein at systec-electronic.com> you wrote:
> 
> A new approach would be to link lowlevel_init directly at 0x00200000 (which is 
> AT91SAM9260_SRAM0_BASE) but the code is located next to the "normal" .text 
> segment. I've prepared a change to cpu/arm926ejs/u-boot.lds (I know it's still 
> 2010.3 but that shouldn't matter now) which links lowlevel_init to 0x00200000. 
> I added the symbols __lowlevel_init_start and __lowlevel_init_end to be used 
> to copy the function from it's LMA to it's VMA address.
> I'm rather unsure if this will work as I thought, Of course more has to be 
> done, like 
> * Make SRAM address configureable
> * Only link to this if CONFIG_SKIP_LOWLEVEL_INIT is not defined
> * Maybe create a region for that
> * ...
> Any opinions, hints, more elegant methods? 

Who loads the code to SRAM?

Best regards,

Wolfgang Denk

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