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From: Cedric VINCENT <cedric.vincent@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] Re: Why exceptions are enabled before exception vector code is copied
Date: Wed, 6 Jul 2005 10:53:23 +0200	[thread overview]
Message-ID: <c8f1005070601532cb85bff@mail.gmail.com> (raw)
In-Reply-To: <20050706080402.0E346353A4E@atlas.denx.de>

> No exceptions are supposed to happen until then.

> What  do  you  suggest  hoiw  such  a
> situation should be handled while running from flash?

There is no reason to enable them before exception vector code is
copied. So exceptions should be enabled *after* exception vector code
is copied.

> It does not happen on other systems.

The spurious "Machine Check Excpetion" is well known on Virtex/PPC.
Most Xilinx FPGA boards are affected (tested on Virtex-II Pro and
Virtex 4).

regards, Cedric VINCENT.

  reply	other threads:[~2005-07-06  8:53 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-07-06  7:45 [U-Boot-Users] Why exceptions are enabled before exception vector code is copied Cedric VINCENT
2005-07-06  8:04 ` [U-Boot-Users] " Wolfgang Denk
2005-07-06  8:53   ` Cedric VINCENT [this message]
2005-07-06  8:59     ` Wolfgang Denk
2005-07-06  9:52       ` Cedric VINCENT
2005-07-06 13:50         ` Cedric VINCENT
2006-03-13 11:24           ` Wolfgang Denk

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