Re: Problems with PM826 card

Hello,

  Thanks a bunch for your guidance. It helped a lot. I was able to
download my Linux image to memory and in flash memory after through cp.
But in both the cases when I tried to boot my linux,  the setup got
restarted after giving the message

bootm 100000

## Booting image at 00100000 ...
  Image Name:   2.4.5-pre1 initrd for
PM826
  Created:      2003-09-04  13:43:13
UTC
  Image Type:   PowerPC Linux Kernel Image
(gz
  Data Size:    516901 Bytes = 504 kB = 0
MB
  Load Address: 00000000
  Entry Point:  0000000c
  Verifying Checksum ... OK
  Uncompressing Kernel Image ...

Could any one please help me what could be the possible problem as I am
totally new to this area. Or If I can get some pointer on where to look
for this trouble It would be a great help.

Thanks & Regards,
Bhavin Shah
Embedded Engineer
eInfochips Ltd.,
bhavinp@einfochips.com

Wolfgang Denk wrote:

Dear Bhavin,

in message [ref] you wrote:

quoted

   I am using a PM826 card with our own developed carrier extension
board. I have build the ppcboot image. I am booting the image from flash

Please upgrade. PPCBoot is pretty old, and  a  lot  of  modifications
have been added lately. Please use a recent version of U-Boot instead
(0.4.7).

quoted

and through serial communication SCC and I have configured the correct
serial channel number from our card's schematics. Now, the ppcboot works
but, when I try to write something in flash through ppcboot (either
'loadb' command or 'nm' command) the flash contents are not getting

Neither the "loadb" nor "nm" commands can operate directly  on  flash
memory.  please  download to RAM (or modify the RAM contents) and use
the "cp" command to write to flash.

quoted

changed. All other functionality of ppcboot works like erase, read, etc.
but all the functionality related to 'write to flash' is not working.

I think all these things are working fine, you are  just  using  them
wrong.

quoted

Can any one please suggest me what could be the possible reason??

Read the documentation; see
http://www.denx.de/twiki/bin/view/DULG/Manual

quoted

Also, I have one separate program which, I downloaded from somewhere
which does some read/write operation to the PM826 card's flash. Through
that program the writing is working perfect.

It's working perfectly in PPCBoot and U-Boot, too. Just remember that
the  command  to  write  to  flash  is  "cp"   (and   it's   variants
"cp.{l|w|b}").

quoted

Has it something to do with ppcboot configuration or the addressing mode?

No, it is a user error.

Best regards,

Wolfgang Denk

--
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
Software suppliers are trying to make their  software  packages  more
``user-friendly''.  .  .  .  Their best approach, so far, has been to
take all the old brochures, and stamp the words, ``user-friendly'' on
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