From: Sascha Hauer <s.hauer@pengutronix.de>
To: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Cc: barebox@lists.infradead.org
Subject: Re: ARM: use high vectors if possible
Date: Mon, 8 Aug 2011 09:32:47 +0200 [thread overview]
Message-ID: <20110808073247.GO31404@pengutronix.de> (raw)
In-Reply-To: <20110808070650.GA22017@game.jcrosoft.org>
Hi J,
On Mon, Aug 08, 2011 at 09:06:50AM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 08:46 Mon 08 Aug , Sascha Hauer wrote:
> > Created this series to get high vector support. Using high vectors
> > at 0xffff0000 allow us to map in a faulting page at 0x0 with which
> > we can catch NULL pointer dereferences. The other patches are only
> > some cleanups around exceptions which I came along the way.
> be careful on ixp4xx (which I work on 0x0 is the nor flash address)
Well, we already map the vectors to 0x0 without this series, so ixp4xx
is broken anyway.
So we either have to add a flag somewhere to disable mapping anything
to 0x0 or we have to use the mmu to map the nor flash somewhere else.
I see this is a problem which must be solved, but this series does not
change the current situation in this regard.
Sascha
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next prev parent reply other threads:[~2011-08-08 7:32 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-08 6:46 Sascha Hauer
2011-08-08 6:46 ` [PATCH 1/8] ARM: add missing volatile in get_cr() Sascha Hauer
2011-08-08 6:46 ` [PATCH 2/8] ARM mmu: fix arm_create_pte Sascha Hauer
2011-08-08 6:46 ` [PATCH 3/8] ARM mmu: use high vectors if possible Sascha Hauer
2011-08-08 6:46 ` [PATCH 4/8] ARM: remove unused exception Sascha Hauer
2011-08-08 6:46 ` [PATCH 5/8] ARM: exceptions: remove unnecessary function declarations Sascha Hauer
2011-08-08 6:46 ` [PATCH 6/8] ARM: remove unused irq enable/disable functions Sascha Hauer
2011-08-08 6:46 ` [PATCH 7/8] ARM: fix comments in interrupts.c Sascha Hauer
2011-08-08 6:46 ` [PATCH 8/8] ARM: some cleanup " Sascha Hauer
2011-08-08 7:06 ` ARM: use high vectors if possible Jean-Christophe PLAGNIOL-VILLARD
2011-08-08 7:32 ` Sascha Hauer [this message]
2011-08-09 7:36 ` Jean-Christophe PLAGNIOL-VILLARD
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