From: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: ARM: use high vectors if possible
Date: Tue, 9 Aug 2011 09:36:07 +0200 [thread overview]
Message-ID: <20110809073607.GF22213@game.jcrosoft.org> (raw)
In-Reply-To: <20110808073247.GO31404@pengutronix.de>
On 09:32 Mon 08 Aug , Sascha Hauer wrote:
> 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.
I'll prefer to remap the flash and keep the same scheme everywhere
can you drop a line in the doc about this
Best Regards,
J.
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prev parent reply other threads:[~2011-08-09 7:54 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
2011-08-09 7:36 ` Jean-Christophe PLAGNIOL-VILLARD [this message]
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