From: afzal.mohd.ma@gmail.com (Afzal Mohammed)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH RFC 2/2] ARM: nommu: remap exception base address to RAM
Date: Wed, 14 Dec 2016 00:14:23 +0530 [thread overview]
Message-ID: <20161213184423.GC4629@afzalpc> (raw)
In-Reply-To: <584FC18D.2050908@arm.com>
Hi,
On Tue, Dec 13, 2016 at 09:38:21AM +0000, Vladimir Murzin wrote:
> On 11/12/16 13:12, Afzal Mohammed wrote:
> > this probably would have to be made robust so as to not cause issue on
> > other v7-A's upon trying to do !MMU (this won't affect normal MMU boot),
> > or specifically where security extensions are not enabled. Also effect
> > of hypervisor extension also need to be considered. Please let know if
> > any better ways to handle this.
> You might need to check ID_PFR1 for that.
Had been searching ARM ARM for this kind of a thing, thanks.
> > +#ifdef CONFIG_REMAP_VECTORS_TO_RAM
> > + mov r3, #CONFIG_VECTORS_BASE @ read VECTORS_BASE
> ldr r3,=CONFIG_VECTORS_BASE
>
> would be more robust. I hit this in [1]
>
> [1] https://www.spinics.net/lists/arm-kernel/msg546825.html
Russell suggested doing it in paging_init(), then probably assembly
circus can be avoided.
Regards
afzal
next prev parent reply other threads:[~2016-12-13 18:44 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 [this message]
2016-12-13 10:02 ` Russell King - ARM Linux
2016-12-13 18:35 ` Afzal Mohammed
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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