[ECOS] RE: FLASH initialization failed, AM29LV400BB on CME-555

[Miguel Josue Vega <mserrano at engin dot umich dot edu>]

Hi Roman and ecos list,

Thanks for your advice. My teammate Eric used GDB to confirm that
something bad is indeed occuring at address 0xD978. This address is
from _mem_copy. The instruction is lbz r1,0(r4) where the contents
of r4 is 8e00000(which we suspected to be out of external RAM range).
We found out that the default redboot build has external RAM mapped
from 0x800000 to 0x87FFFF. I think that this might be incorrect since this
default mapping applies to when the CME-555 board has 512K of AM29LV200
type memory. Since our CME-555 board came with AM29LV400BB type RAM, we
have double that amount (1M). Does anyone know what kind of changes I have
to make to the configuration to take this into account? I have the idea
to manually change the memory mapping in the following:

mlt_powerpc_cme555_rom.ldi
mlt_powerpc_cme555_rom.h

Is this a good approach to take?

Thanks,
Miguel Vega
FEGI Team
University of Michigan

On Tue, 1 Jun 2004, Rycerz Roman-G11565 wrote:

> Hi....
>
>
> You shouldn't get the 1st message you did about the "+FLASH: driver init failed: Driver does not support device..."
> If you truly have removed the flash support... Rebuild Redboot with a fresh set of directories... I.e. delete them.
>
> The other message is that Redboot is barfing on powerup.. 1 trick I was clued in about, is before you power up the board
> Make sure gdb is open and the connection to target started.  When you hit the power, gdb should connect and tell you where it is unhappy.
> What it looks like is that is something bad is at address 0000d978
>
>
> Roman
>
>
> -----Original Message-----
> From: Miguel Josue Vega [mailto:mserrano@engin.umich.edu]
> Sent: Tuesday, June 01, 2004 12:05 PM
> To: Roman Rycerz
> Cc: ecos-discuss@sources.redhat.com
> Subject: FLASH initialization failed, AM29LV400BB on CME-555
>
>
> Hi Roman,
>
> We have gotten RedBoot (ROM-startup) to run on our Axiom CME-555 board. The board has AMD AM29LV400BB external flash. When we built a default RedBoot build with no FLASH support we get the following message before the startup banner: "+FLASH: driver init failed: Driver does not support device..."
>
> When we configure redboot for AM29LV400 type flash we do not get a startup banner at all, instead we get the following output: "+$T0b40:0000d978;01:00400f2c;#50".
>
> I do not understand why we get the output since RedBoot was configured for the type of flash on the board. Any suggestions?
>
> Thanks,
> Miguel Vega
> FEGI Team
> University of Michigan
>

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