Subject: Re: Help ! 2.6.14 kernel can't bring up

From: Clemens Koller <[email-masked]>
Date: Fri, 18 Nov 2005 19:44:15 +0100

Hello, zjznliang!

zjznliang wrote:
> Hi linuxppc-embedded！
> 
> 	Hi , How to config the "early printk" in 2.6.14 linux configration???

Well... check the .config or the kernel sources for
CONFIG_EARLY_PRINTK
or
CONFIG_WANT_EARLY_SERIAL

Have a look at the bootup code of your board, where it's used.
I would call the printk as soon as the serial ports are initialized.
If that's too late, try to toggle some pin as early as possible.
If that doesn't work, and if you have no more ideas of what to do,
you might think about getting some hardware debugging tools.

Best greets,
-- 
Clemens Koller
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