Return-Path: Received: from mail0.scram.de (mail0.scram.de [78.47.204.202]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail0.scram.de", Issuer "scram e.V. CA" (not verified)) by ozlabs.org (Postfix) with ESMTP id B6D56DDF63 for ; Tue, 28 Aug 2007 21:43:47 +1000 (EST) Message-ID: <46D40510.3060805@scram.de> Date: Tue, 28 Aug 2007 13:20:48 +0200 From: Jochen Friedrich MIME-Version: 1.0 To: linuxppc-embedded@ozlabs.org Subject: [PATCH] ppc32/8xx: Fix r3 trashing due to 8MB TLB page instantiation Content-Type: multipart/mixed; boundary="------------000709070107090300080001" Cc: linux-kernel@vger.kernel.org List-Id: Linux on Embedded PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , This is a multi-part message in MIME format. --------------000709070107090300080001 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit 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 , 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 --- 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 --------------000709070107090300080001 Content-Type: text/x-patch; name="d14ebb1e9d133983252a14f2ef037f76969ab3c6.diff" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="d14ebb1e9d133983252a14f2ef037f76969ab3c6.diff" 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 --------------000709070107090300080001--