RE: BUG 2.6.7 hangs on boot (rx2600)

["Chen, Kenneth W" <kenneth.w.chen@intel.com>]

>>>> Jesse Barnes wrote on Thursday, July 08, 2004 11:13 AM
> >
> > Jesse, do you know if unapplying the "move current to region 5" patch
> > fixes your boot-problem?  For convenience, I attached the (original)
> > patch below.
>
> Applying this small patch to head.S gets me as far as Grant's original report.
>
> -(isBP) br.cond.dpnt .load_current
> +//(isBP)       br.cond.dpnt .load_current
>
> This lets me get to:
>
> PID hash table entries: 4096 (order 12: 65536 bytes)
> CPU 0: base freq 0.000MHz, ITC ratio\x10/2, ITC freq\x1000.000MHz+/--1ppm
> Console: colour dummy device 80x25
>
> And like I've already mentioned, if I revert the whole thing the kernel boots
> fine.  Ugg, I'm really starting to dislike the move of the init_task...

It is something related to stack pointer (r12).  If sp stays in region 7
(providing there is a corresponding dtr mapping), kernel boots fine.  David
mentioned that MCA code also has tpa thingy in it that needs to be converted.
One other thing I'm getting frustrated at is I'm keep on receiving mca while
doing a ptc.e (only on sgi altix).  Have no idea why.

- Ken