[PATCH 3/4] ARM: mm: kill unused TLB_CAN_READ_FROM_L1_CACHE and use ALT_SMP instead

[Will Deacon]

On Wed, May 15, 2013 at 05:29:03PM +0100, Gregory CLEMENT wrote:
> On 05/15/2013 05:41 PM, Will Deacon wrote:
> > On Wed, May 15, 2013 at 04:36:43PM +0100, Gregory CLEMENT wrote:
> >> On 05/15/2013 05:04 PM, Will Deacon wrote:
> >>> On Wed, May 15, 2013 at 03:46:20PM +0100, Gregory CLEMENT wrote:
> >>>> On 05/15/2013 04:06 PM, Will Deacon wrote:
> >>>>> You could also try deleting both of the ALT_* lines and just putting a
> >>>>> W(nop) in there directly.
> >>>>
> >>>> If I just delete the both of the ALT_* lines it no more hangs.
> >>>> If I put a  W(nop) instead it hangs.
> >>
> >> It also hang with a simple nop by the way
> > 
> > Ok. Have you tried adding a different instruction (mov r0, r0, for example)?
> 
> it hanged again :(
> 
> I also try to boot a kernel in Thumb2, it doesn't hang in the same place but the kernel
> crash latter

Crikey, that's not much fun. My last idea is to try sticking an isb
instruction in there. Does that make any difference?

Can you get access to another 370 board and see if the problem reproduces
there? Is there any possibility of getting JTAG (again, perhaps on a
different board)?

Failing that, I think you need to pester the CPU guys and/or the board guys
to help you debug this.

Will