From: Tony Lindgren <tony@atomide.com>
To: linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org
Cc: 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: [PATCH] ARM: Fix errata 751472 handling on Cortex-A9 r1p*
Date: Wed, 14 Nov 2012 10:53:35 -0800 [thread overview]
Message-ID: <20121114185335.GU6801@atomide.com> (raw)
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*.
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
Can somebody with access to the errata check if it has more
info on which revisions this should be set on? Maybe it's just
r2p* - r3p0?
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -236,6 +236,8 @@ __v7_setup:
mcreq p15, 0, r10, c15, c0, 1 @ write diagnostic register
#endif
#if defined(CONFIG_ARM_ERRATA_751472) && defined(CONFIG_SMP)
+ teq r5, #0x00100000 @ fails at least on r1p2
+ beq 1f
ALT_SMP(cmp r6, #0x30) @ present prior to r3p0
ALT_UP_B(1f)
mrclt p15, 0, r10, c15, c0, 1 @ read diagnostic register
next reply other threads:[~2012-11-14 18:53 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-14 18:53 Tony Lindgren [this message]
2012-11-14 19:01 ` [PATCH] ARM: Fix errata 751472 handling on Cortex-A9 r1p* Russell King - ARM Linux
2012-11-14 19:19 ` Tony Lindgren
2012-11-14 19:06 ` Jon Hunter
2012-11-14 19:21 ` Tony Lindgren
2012-11-14 20:22 ` Russell King - ARM Linux
2012-11-14 20:32 ` Tony Lindgren
2012-11-14 21:57 ` Rob Herring
2012-11-14 22:21 ` Tony Lindgren
2012-11-15 0:54 ` Rob Herring
2012-11-15 2:08 ` Tony Lindgren
2012-11-15 11:01 ` Catalin Marinas
2012-11-15 12:41 ` Siarhei Siamashka
2012-11-15 13:36 ` Russell King - ARM Linux
2012-11-15 13:52 ` Catalin Marinas
2012-11-15 15:14 ` Måns Rullgård
2012-11-15 14:31 ` Rob Herring
2012-11-15 14:37 ` Catalin Marinas
2012-11-15 15:37 ` Rob Herring
2012-11-15 16:06 ` Catalin Marinas
2012-11-16 10:05 ` Russell King - ARM Linux
2012-11-16 17:13 ` Tony Lindgren
2012-11-16 18:41 ` Russell King - ARM Linux
2012-11-16 9:59 ` Russell King - ARM Linux
2012-11-16 18:09 ` Catalin Marinas
2012-11-16 18:39 ` Russell King - ARM Linux
2012-11-17 10:46 ` Catalin Marinas
2012-11-15 9:22 ` Russell King - ARM Linux
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