Re: Mounta Vista Linux prompt on serial console

In message [ref] you wrote:

Our target is somewhat like this. It has PPC8270, Flash and SDRAM. We
are using the uboot for booting. Successfully built the linux kernel and
Ramdisk images using devrocket. The problem is that the kernel and

Are you sure that your Linux kernel is configured to be booted by U-Boot?

Ramdisk images although getting extracted successfully to 0M location of
SDRAM from Flash with the help of uboot, the serial console says nothing
except "uboot ist nicht tot..."

Funny. This message is neiter part of the standard U-Boot code nor of
the standard Linux kernel. Try to find out where this code is  coming
from.

1. How do I know that the control was given to linux kernel?

Set a breakpoint at a low address like 0x000C. If the debugger  stops
there you are executing Linux kernel code.

Alternatively, enable DEBUG when building your U-Boot image (at least
when compiling file "common/cmd_bootm.c").

2. Is it that the linux kernel got the control but unable to put the
prompt on the serial line? FYI.  I modified the inittab to reflect the
console to come on the serial line.

Inittab has nothing to do with the kernel's startup messages. Is your
kernel configured correctly for using a serial console?

3. Is there any documentation which gives the detailed debugging of the
linux kernel from the loading of kernel?

This is partially covered in the DULG, see
http://www.denx.de/twiki/bin/view/DULG/Manual

Best regards,

Wolfgang Denk

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