linux-kernel - [PATCH 4/4] powerpc32/8xx: invert _PAGE

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Message-Id: <20141210180046.9A8FA1A5D62@localhost.localdomain>
Date:	Wed, 10 Dec 2014 19:00:46 +0100 (CET)
From:	Christophe Leroy <christophe.leroy@....fr>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>, scottwood@...escale.com
CC:	linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH 4/4] powerpc32/8xx: invert _PAGE_RW bit in PTE accessors

The 8xx inverts _PAGE_RW. Lets to it in PTE accessors.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>

---
 arch/powerpc/include/asm/pte-8xx.h | 1 +
 arch/powerpc/kernel/head_8xx.S     | 3 ---
 2 files changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/pte-8xx.h b/arch/powerpc/include/asm/pte-8xx.h
index daa4616..57bad0a 100644
--- a/arch/powerpc/include/asm/pte-8xx.h
+++ b/arch/powerpc/include/asm/pte-8xx.h
@@ -57,6 +57,7 @@
 #define _PMD_PAGE_8M	0x000c
 
 #define _PTE_NONE_MASK _PAGE_KNLRO
+#define _PTE_HW_INVERTED	_PAGE_RW
 
 /* Until my rework is finished, 8xx still needs atomic PTE updates */
 #define PTE_ATOMIC_UPDATES	1
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 3d4b8ee..807b0db 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -441,9 +441,6 @@ DataStoreTLBMiss:
 	and	r11, r11, r10
 	rlwimi	r10, r11, 0, _PAGE_PRESENT
 #endif
-	/* invert RW */
-	xori	r10, r10, _PAGE_RW
-
 	/* The Linux PTE won't go exactly into the MMU TLB.
 	 * Software indicator bits 22 and 28 must be clear.
 	 * Software indicator bits 24, 25, 26, and 27 must be
-- 
2.1.0

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