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Date: Tue, 13 Aug 2013 11:48:31 +0200
From: Katja Malvoni <kmalvoni@...il.com>
To: john-dev@...ts.openwall.com
Subject: Re: Parallella: bcrypt

On Tue, Aug 13, 2013 at 12:35 AM, Yaniv Sapir <yaniv@...pteva.com> wrote:

> Register f0444 is a special undocumented register that tells us a few
> things about the core's status. However, the value you see does not point
> to a specific problem. The STATUS reg does not show a problem either. Can
> you please tell me the value of the reg. f040c?
>

F040C is zero for all cores.


> The one thing I'd suspect is using the e_reset_core() call while a global
> address load or fetch are in progress. In this case, you can cause a system
> lockup if the state machines get reset while the data is in the writeback
> stage. Do you have any situation like this in there?
>

No, I don't. I'm using e_reset_system() before computation starts and that
is the only reset.


>  I also would like to know the contents of the IVT of the stuck core. Is
> it the same as the other cores?
>

IVT is address 0 of core? If yes, it's 0x00002ce8 and it's same for stuck
core and for others.

Katja

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