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From: "Autran, Guillaume" <gautran@mrv.com>
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	"'n_tbinh@yahoo.com'" <n_tbinh@yahoo.com>
Date: Wed, 23 Nov 2005 11:39:05 -0500
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Subject: RE: Booting hangs after "Calibrating delay loop..."
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Hi,

I remember there is some race condition before calling set_dec(..) in time.c
Basically, what happens is that the external decrementer is set way before
the interrupt gets enabled. When we get to enable the interrupt, the
decrementer value already reached 0 and wrapped arround (at least in our
case). 
The fix was to comment the line in:
arch/ppc/kernel/time.c:330: set_dec(tb_ticks_per_jiffy);

And move it to:
arch/ppc/syslib/m8xx_setup.c
inside m8xx_calibrate_decr() just before setting up the interrupt for the
decrementer.

In time.c, you may also need to initialize stamp = get_native_tbl(); as this
variable may not have been initialized since you are using an external
decrementer.

Try that...

Guillaume.