Re: booting HardHat on IBM 405GP

Zehetbauer Thomas wrote:

It seems that execution stops when calling rfi in
arch/ppc/kernel/head_4xx.S. I have put the sample code provided to
output a single character on the serial port immediately before the rfi
call and after the after the start_here label. Only the first is beeing
executed. Any ideas?

Tom

What kernel version are you using?  Where did you get the kernel?
What is the console output, from power on to the point where it hangs?

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Zehetbauer Thomas wrote:

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My company is going to develop an embedded solution based

on a IBM 406GP

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processor.
We are in early development right now and I am trying to

boot linux on a

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IBM 25 EB 405 P4 WIN WAL 00

evaluation kit (this is the information on the bill of delivery).

Attempting to debug I've found

linux/arch/ppc/boot/tree/main.c:start to

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be the first function executed.
At the very last step this function calls

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   (*(void (*)())sa)(&board_info,
                     initrd_start,
                     initrd_start + initrd_size,
                     cmdline,
                     cmdline + strlen(cmdline));

and I can't find where execution goes on.

PS: Does someone know how to determine the board's revision number?

Check the PVR reported by the bootrom when you power on or reset the Walnut.

405GP rev B    PVR: 40110040
405GP rev C    PVR: 40110082
405GP rev D    PVR: 401100c4

-Frank
--
Frank Rowand [off-list ref]
MontaVista Software, Inc

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