On Thu, Nov 10, 2011 at 11:47 AM, Timur Tabi timur@freescale.com wrote:
I boot off of SDCARD (P2020COME_SDCARD_config). To write the U-Boot image to the microSD card, I use a tool provided with the BSP called "boot_format-1.0.0". Maybe you are familiar with it?
I think that qualifies as multi-stage booting. The SD card is not mapped at address fff00000 at POR time, which is needed to boot a single-stage U-Boot. Therefore, you must have a multi-stage U-Boot.
I'm not familiar with boot_format-1.0.0, but my guess is that it creates the pre-boot loader.
Timur,
Did you test your CCSRBAR changes with a board that uses the on chip rom as well as L2SRAM to boot? Does the COME board load from SDCARD to DDR or to L2SRAM? I suspect it's L2SRAM since this board has 512kB which is large enough for a stock u-boot image.
-M