From: Jochen Friedrich <jochen@scram.de>
To: linuxppc-embedded@ozlabs.org
Cc: linux-kernel@vger.kernel.org
Subject: [PATCH] ppc32/8xx: Fix r3 trashing due to 8MB TLB page instantiation
Date: Tue, 28 Aug 2007 13:20:48 +0200 [thread overview]
Message-ID: <46D40510.3060805@scram.de> (raw)
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Instantiation of 8MB pages on the TLB cache for the kernel static
mapping trashes r3 register on !CONFIG_8xx_CPU6 configurations.
This ensures r3 gets saved and restored.
This has been posted to linuxppc-embedded by Marcelo Tosatti
<marcelo@kvack.org>, but only an incomplete version of the patch
has been applied in c51e078f82096a7d35ac8ec2416272e843a0e1c4.
This patch adds the rest of the fix.
Signed-off-by: Jochen Friedrich <jochen@scram.de>
---
arch/ppc/kernel/head_8xx.S | 2 --
1 files changed, 0 insertions(+), 2 deletions(-)
This can be pulled from git://git.bocc.de/dbox2.git ppc-fixes
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diff --git a/arch/ppc/kernel/head_8xx.S b/arch/ppc/kernel/head_8xx.S
index 944c35c..eb8d26f 100644
--- a/arch/ppc/kernel/head_8xx.S
+++ b/arch/ppc/kernel/head_8xx.S
@@ -495,9 +495,7 @@ LoadLargeDTLB:
lwz r11, 4(r0)
lwz r12, 16(r0)
-#ifdef CONFIG_8xx_CPU6
lwz r3, 8(r0)
-#endif
rfi
/* This is the data TLB error on the MPC8xx. This could be due to
next reply other threads:[~2007-08-28 11:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-28 11:20 Jochen Friedrich [this message]
2007-08-29 12:22 ` [PATCH] ppc32/8xx: Fix r3 trashing due to 8MB TLB page instantiation Marcelo Tosatti
2007-08-29 23:08 ` Kumar Gala
2007-08-30 8:48 ` Jochen Friedrich
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