[U-Boot-Users] u-boot hangs after relocating itself to ram

Andre Puschmann andre.puschmann at stud.tu-ilmenau.de
Sat Dec 2 12:56:34 CET 2006

Hello everybody,
yesterday I solved my problem. It was a faulty sdram initialization.
But still don't know why the values I used before didn't work.
But its  kind of robustness that the systems works with the values
assumed not to work.
Anyway, thank you for your help.

Best regards,


Andre Puschmann wrote:
> Hey folkes,
> I have ported u-boot to a custom board based on a freescale mpc5200. I
> can successfully copy u-boot into flash using the connected bdi2000 and
> we get some output on the debug port. It seems that the board crashes
> right after relocation to ram (see output). I already
> read the regarding faq entry but I'm not sure if this problem has
> something to do with faulty sdram initialization.
> this is the output than comes up on the console:
> 20030.56> U-Boot 1.1.6-ge4bbd8da-dirty (Nov 27 2006 - 18:46:24)
> 20030.56>
> 20030.56> CPU:   MPC5200 v1.2, Core v1.1 at 396 MHz
> 20030.56>        Bus 132 MHz, IPB 66 MHz, PCI 33 MHz
> 20030.57> Board: MPC5200 ECU
> 20030.57> I2C:   85 kHz, ready
> 20030.57> DRAM:   8 MB
> 20030.57> FLASH:
> I'm using eldk 4.0 + insight to debug the problem. I can single-step
> through the code up to the point where it branches to sdram.
> After relocation I loaded a new symbol file width offset 0x7d8000, since
> this is the dest-address for relocate_code().
> If I continue running from that point on the board crashes at 0x7dc314
> which is in function loadtask(). In assembler the code looks like this:
> "0x7dc314	<loadtask+48>:		lwz     r11,-32768(r30)"
> Can this be a sdram related problem or what might cause this behavior?
> Any comments and suggestions are more than welcome.
> Best regards,
> André Puschmann
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