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

Dear Alexander Stein,

In message 201006161018.48802.alexander.stein@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