[U-Boot-Users] MPC8245 custom board, Linux kernel hangs after uncompressing

[Kishore Devireddy <kishorekrd@gmail.com>]

Hi 

Thanks for your reply. U-boot is working very well on the custom
mpc8245 board. I did some changes in the A3000.h file to make it work.
All most all the features of u-boot are working. Problem comes when I
load linux on to it. I compiled ELDK 3.0 verison. Since ELDK 3.0 does
not have A3000 configuration I modified Sandpoint8245 configuration
and compiled it. As I mentioned I did all the 3 steps mentioned in FAQ
for "linux hangs after uncompressing" problem.

1. I configured linux kernel Sandpoint8245 .config file with flash and
network drivers needed for my board. Is there any thing I need to do
for SDRAM?
2. When I tried to run vmlinux using BDI2000 (with out u-boot) I got
the following output

BDI>prog 0xffc00000 vmlinux.eldk bin
Programming vmlinux.eldk , please wait ....
Programming flash passed
BDI>go 0xffc00000
- TARGET: target has entered debug mode
BDI>info
    Target CPU        : MPC82xx (G2H4)
    Target state      : debug mode
    Debug entry cause : FPU unavailable exception
    Current PC        : 0x00000000
    Current CR        : 0x20000000
    Current MSR       : 0x00000000
    Current LR        : 0xffd7ee18

Is there any thing I need to do to fix this. 

3. Is there any embedded linux available for the artis A3000 type of board?

Thanks
Kishore

On 4/19/05, Wolfgang Denk <wd@denx.de> wrote:
> In message <2cf2641f0504191646536d2ad5@mail.gmail.com> you wrote:
> >
> > I am trying to run Embedded linux (ELDK) on a custom powerpc board,
> > which is similar to Artis A3000 board. This board has
> > mpc8245(XPC8245LZY266B), natsemi 83815 ethernet, 4MB intel e28f320
> > flash, 16MB winbond w986432DH-6 SDRAM. So I configured and compiled
> > U-boot for A3000 borad. U-boot worked on my board also. Next I
> > compiled ELDK 3.0 for Sandpoint 8245 board and copied to flash. But
> 
> I don't think that you compiled the _ELDK_!
> 
> > linux hangs after uncompressing
> ...
> > nothing happens after this until I reboot the board. I read u-boot FAQ
> > and configured bd_info structure same for both u-boot and Linux. I
> > found that CFG_IMMR is not applicable to MPC8245. I also used
> > clocks_in_mhz variable also before loading Linux. I am stuck here.
> 
> I hope with "used" you mean that you made sure it is NOT set.
> 
> > Could you please let me know what should I do next?
> 
> You make a fundamental error. You're using  an  U-Boot  configuration
> which has not been correctly ported and configured to your board, and
> you're  using  a Linux kernel which has not been correctly ported and
> configured to your board.
> 
> This cannot work. Go back to square 1.
> 
> Best regards,
> 
> Wolfgang Denk
> 
> --
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
> If A equals success, then the formula is A = X + Y + Z. X is work.  Y
> is play. Z is keep your mouth shut.                 - Albert Einstein
>