From: Afzal Mohammed <afzal.mohd.ma@gmail.com>
To: Russell King - ARM Linux <linux@armlinux.org.uk>
Cc: Vladimir Murzin <vladimir.murzin@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH RFC 2/2] ARM: nommu: remap exception base address to RAM
Date: Wed, 14 Dec 2016 00:05:47 +0530 [thread overview]
Message-ID: <20161213183547.GB4629@afzalpc> (raw)
In-Reply-To: <20161213100226.GW14217@n2100.armlinux.org.uk>
Hi,
On Tue, Dec 13, 2016 at 10:02:26AM +0000, Russell King - ARM Linux wrote:
> On Sun, Dec 11, 2016 at 06:42:55PM +0530, Afzal Mohammed wrote:
> > bic r0, r0, #CR_V
> > #endif
> > mcr p15, 0, r0, c1, c0, 0 @ write control reg
> > +
> > +#ifdef CONFIG_REMAP_VECTORS_TO_RAM
> > + mov r3, #CONFIG_VECTORS_BASE @ read VECTORS_BASE
> > + mcr p15, 0, r3, c12, c0, 0 @ write to VBAR
> > +#endif
> > +
> Is there really any need to do this in head.S ?
Seeing the high vector configuration done here, pounced upon it :)
> I believe it's
> entirely possible to do it later - arch/arm/mm/nommu.c:paging_init().
>
> Also, if the region setup for the vectors was moved as well, it would
> then be possible to check the ID registers to determine whether this
> is supported, and make the decision where to locate the vectors base
> more dynamically.
i will look into it.
Regards
afzal
next prev parent reply other threads:[~2016-12-13 18:35 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-11 13:10 [PATCH 0/2] ARM: v7-A !MMU fixes for fun (&fame) Afzal Mohammed
2016-12-11 13:11 ` [PATCH 1/2] ARM: nommu: allow enabling REMAP_VECTORS_TO_RAM Afzal Mohammed
2016-12-13 9:17 ` Vladimir Murzin
2016-12-11 13:12 ` [PATCH RFC 2/2] ARM: nommu: remap exception base address to RAM Afzal Mohammed
2016-12-11 14:42 ` Afzal Mohammed
2016-12-13 9:38 ` Vladimir Murzin
2016-12-13 18:44 ` Afzal Mohammed
2016-12-13 10:02 ` Russell King - ARM Linux
2016-12-13 18:35 ` Afzal Mohammed [this message]
2017-01-07 17:13 ` Afzal Mohammed
2017-01-07 17:20 ` [PATCH WIP 1/4] ARM: nommu: dynamic exception base address setting afzal mohammed
2017-01-07 17:21 ` [PATCH WIP 2/4] ARM: nommu: remove Hivecs configuration is asm afzal mohammed
2017-01-07 17:22 ` [PATCH WIP 3/4] ARM: mm: nommu: display dynamic exception base afzal mohammed
2017-01-07 17:22 ` [PATCH WIP 4/4] ARM: remove compile time vector base for CP15 case afzal mohammed
2017-01-07 17:38 ` Russell King - ARM Linux
2017-01-07 18:02 ` Afzal Mohammed
2017-01-07 18:07 ` Afzal Mohammed
2017-01-07 18:24 ` Russell King - ARM Linux
2017-01-08 9:58 ` Afzal Mohammed
2017-01-15 11:47 ` [PATCH RFC 2/2] ARM: nommu: remap exception base address to RAM Afzal Mohammed
2017-01-16 9:53 ` Vladimir Murzin
2017-01-16 12:34 ` Afzal Mohammed
2016-12-12 18:44 ` [PATCH 0/2] ARM: v7-A !MMU fixes for fun (&fame) Afzal Mohammed
2016-12-12 20:42 ` Peter Korsgaard
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