From: Jon Hunter <jon-hunter@ti.com>
To: Tony Lindgren <tony@atomide.com>
Cc: linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org,
Russell King <linux@arm.linux.org.uk>,
Will Deacon <will.deacon@arm.com>,
Catalin Marinas <Catalin.Marinas@arm.com>,
Dave Martin <dave.martin@linaro.org>,
Santosh Shilimkar <santosh.shilimkar@ti.com>
Subject: Re: [PATCH] ARM: Fix errata 751472 handling on Cortex-A9 r1p*
Date: Wed, 14 Nov 2012 13:06:53 -0600 [thread overview]
Message-ID: <50A3EBCD.3040801@ti.com> (raw)
In-Reply-To: <20121114185335.GU6801@atomide.com>
On 11/14/2012 12:53 PM, Tony Lindgren wrote:
> Looks like enabling CONFIG_ARM_ERRATA_751472 causes omap4 blaze
> to not boot when enabled. The ARM core on it is an earlier r1p2:
>
> CPU: ARMv7 Processor [411fc092] revision 2 (ARMv7), cr=10c53c7d
>
> Unfortunately I don't have the details of errata 751472, but I'm
> guessing we need to disable it for r1p*.
I checked the CA9MP errata document and this erratum impacts all
r0/r1/r2 CPUs. I am wondering if the problem is because the workaround
requires you to set a bit in the Diagnostic Control register and the
read-modify-write sequence provided in the workaround is for secure
mode. Not sure if there is a non-secure workaround available :-(
Cheers
Jon
WARNING: multiple messages have this Message-ID (diff)
From: jon-hunter@ti.com (Jon Hunter)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM: Fix errata 751472 handling on Cortex-A9 r1p*
Date: Wed, 14 Nov 2012 13:06:53 -0600 [thread overview]
Message-ID: <50A3EBCD.3040801@ti.com> (raw)
In-Reply-To: <20121114185335.GU6801@atomide.com>
On 11/14/2012 12:53 PM, Tony Lindgren wrote:
> Looks like enabling CONFIG_ARM_ERRATA_751472 causes omap4 blaze
> to not boot when enabled. The ARM core on it is an earlier r1p2:
>
> CPU: ARMv7 Processor [411fc092] revision 2 (ARMv7), cr=10c53c7d
>
> Unfortunately I don't have the details of errata 751472, but I'm
> guessing we need to disable it for r1p*.
I checked the CA9MP errata document and this erratum impacts all
r0/r1/r2 CPUs. I am wondering if the problem is because the workaround
requires you to set a bit in the Diagnostic Control register and the
read-modify-write sequence provided in the workaround is for secure
mode. Not sure if there is a non-secure workaround available :-(
Cheers
Jon
next prev parent reply other threads:[~2012-11-14 19:07 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-14 18:53 [PATCH] ARM: Fix errata 751472 handling on Cortex-A9 r1p* Tony Lindgren
2012-11-14 18:53 ` Tony Lindgren
2012-11-14 19:01 ` Russell King - ARM Linux
2012-11-14 19:01 ` Russell King - ARM Linux
2012-11-14 19:19 ` Tony Lindgren
2012-11-14 19:19 ` Tony Lindgren
2012-11-14 19:06 ` Jon Hunter [this message]
2012-11-14 19:06 ` Jon Hunter
2012-11-14 19:21 ` Tony Lindgren
2012-11-14 19:21 ` Tony Lindgren
2012-11-14 20:22 ` Russell King - ARM Linux
2012-11-14 20:22 ` Russell King - ARM Linux
2012-11-14 20:32 ` Tony Lindgren
2012-11-14 20:32 ` Tony Lindgren
2012-11-14 21:57 ` Rob Herring
2012-11-14 21:57 ` Rob Herring
2012-11-14 22:21 ` Tony Lindgren
2012-11-14 22:21 ` Tony Lindgren
2012-11-15 0:54 ` Rob Herring
2012-11-15 0:54 ` Rob Herring
2012-11-15 2:08 ` Tony Lindgren
2012-11-15 2:08 ` Tony Lindgren
2012-11-15 11:01 ` Catalin Marinas
2012-11-15 11:01 ` Catalin Marinas
2012-11-15 12:41 ` Siarhei Siamashka
2012-11-15 12:41 ` Siarhei Siamashka
2012-11-15 13:36 ` Russell King - ARM Linux
2012-11-15 13:36 ` Russell King - ARM Linux
2012-11-15 13:52 ` Catalin Marinas
2012-11-15 13:52 ` Catalin Marinas
2012-11-15 15:14 ` Måns Rullgård
2012-11-15 15:14 ` Måns Rullgård
2012-11-15 14:31 ` Rob Herring
2012-11-15 14:31 ` Rob Herring
2012-11-15 14:37 ` Catalin Marinas
2012-11-15 14:37 ` Catalin Marinas
2012-11-15 15:37 ` Rob Herring
2012-11-15 15:37 ` Rob Herring
2012-11-15 16:06 ` Catalin Marinas
2012-11-15 16:06 ` Catalin Marinas
2012-11-16 10:05 ` Russell King - ARM Linux
2012-11-16 10:05 ` Russell King - ARM Linux
2012-11-16 17:13 ` Tony Lindgren
2012-11-16 17:13 ` Tony Lindgren
2012-11-16 18:41 ` Russell King - ARM Linux
2012-11-16 18:41 ` Russell King - ARM Linux
2012-11-16 9:59 ` Russell King - ARM Linux
2012-11-16 9:59 ` Russell King - ARM Linux
2012-11-16 18:09 ` Catalin Marinas
2012-11-16 18:09 ` Catalin Marinas
2012-11-16 18:39 ` Russell King - ARM Linux
2012-11-16 18:39 ` Russell King - ARM Linux
2012-11-17 10:46 ` Catalin Marinas
2012-11-17 10:46 ` Catalin Marinas
2012-11-15 9:22 ` Russell King - ARM Linux
2012-11-15 9:22 ` Russell King - ARM Linux
2012-12-12 0:46 ` Jon Masters
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