Revert "powerpc/book3s32: Reorder _PAGE_XXX flags to simplify TLB handling"

This reverts commit 78ca1108b10927b3d068c8da91352b0f4cd01fc5.

It is causing boot failures with qemu mac99 in at least some
configurations.

3 files changed, 12 insertions, 7 deletions

diff --git a/arch/powerpc/include/asm/book3s/32/hash.h b/arch/powerpc/include/asm/book3s/32/hash.h
index a5907ea4fb40..2a0a467d2985 100644
--- a/arch/powerpc/include/asm/book3s/32/hash.h
+++ b/arch/powerpc/include/asm/book3s/32/hash.h
@@ -17,9 +17,9 @@
  * updating the accessed and modified bits in the page table tree.
  */
 
-#define _PAGE_RW	0x001	/* PP = x1: user write access allowed */
-#define _PAGE_USER	0x002	/* PP = 1x: usermode access allowed */
-#define _PAGE_HASHPTE	0x004	/* software: hash_page has made an HPTE for this pte */
+#define _PAGE_PRESENT	0x001	/* software: pte contains a translation */
+#define _PAGE_HASHPTE	0x002	/* hash_page has made an HPTE for this pte */
+#define _PAGE_USER	0x004	/* usermode access allowed */
 #define _PAGE_GUARDED	0x008	/* G: prohibit speculative access */
 #define _PAGE_COHERENT	0x010	/* M: enforce memory coherence (SMP systems) */
 #define _PAGE_NO_CACHE	0x020	/* I: cache inhibit */
@@ -27,7 +27,7 @@
 #define _PAGE_DIRTY	0x080	/* C: page changed */
 #define _PAGE_ACCESSED	0x100	/* R: page referenced */
 #define _PAGE_EXEC	0x200	/* software: exec allowed */
-#define _PAGE_PRESENT	0x400	/* software: pte contains a translation */
+#define _PAGE_RW	0x400	/* software: user write access allowed */
 #define _PAGE_SPECIAL	0x800	/* software: Special page */
 
 #ifdef CONFIG_PTE_64BIT
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index e7a5b312a7db..fdb587c96a80 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -522,6 +522,7 @@ InstructionTLBMiss:
 	andc.	r1,r1,r0		/* check access & ~permission */
 	bne-	InstructionAddressInvalid /* return if access not permitted */
 	/* Convert linux-style PTE to low word of PPC-style PTE */
+	rlwimi	r0,r0,32-1,30,30	/* _PAGE_USER -> PP msb */
 	ori	r1, r1, 0xe05		/* clear out reserved bits */
 	andc	r1, r0, r1		/* PP = user? 2 : 0 */
 BEGIN_FTR_SECTION
@@ -589,7 +590,8 @@ DataLoadTLBMiss:
 	 * we would need to update the pte atomically with lwarx/stwcx.
 	 */
 	/* Convert linux-style PTE to low word of PPC-style PTE */
-	rlwinm	r1, r0, 0, 31, 31	/* _PAGE_RW -> PP lsb */
+	rlwinm	r1,r0,32-10,31,31	/* _PAGE_RW -> PP lsb */
+	rlwimi	r0,r0,32-1,30,30	/* _PAGE_USER -> PP msb */
 	rlwimi	r0,r0,32-1,31,31	/* _PAGE_USER -> PP lsb */
 	ori	r1,r1,0xe04		/* clear out reserved bits */
 	andc	r1,r0,r1		/* PP = user? rw? 2: 3: 0 */
@@ -668,6 +670,7 @@ DataStoreTLBMiss:
 	 * we would need to update the pte atomically with lwarx/stwcx.
 	 */
 	/* Convert linux-style PTE to low word of PPC-style PTE */
+	rlwimi	r0,r0,32-1,30,30	/* _PAGE_USER -> PP msb */
 	li	r1,0xe05		/* clear out reserved bits & PP lsb */
 	andc	r1,r0,r1		/* PP = user? 2: 0 */
 BEGIN_FTR_SECTION
diff --git a/arch/powerpc/mm/hash_low_32.S b/arch/powerpc/mm/hash_low_32.S
index f4294edeca9d..d94fef524ef5 100644
--- a/arch/powerpc/mm/hash_low_32.S
+++ b/arch/powerpc/mm/hash_low_32.S
@@ -310,9 +310,11 @@ Hash_msk = (((1 << Hash_bits) - 1) * 64)
 
 _GLOBAL(create_hpte)
 	/* Convert linux-style PTE (r5) to low word of PPC-style PTE (r8) */
+	rlwinm	r8,r5,32-10,31,31	/* _PAGE_RW -> PP lsb */
 	rlwinm	r0,r5,32-7,31,31	/* _PAGE_DIRTY -> PP lsb */
-	and	r8, r5, r0		/* writable if _RW & _DIRTY */
-	rlwimi	r5, r5, 32 - 1, 31, 31	/* _PAGE_USER -> PP lsb */
+	and	r8,r8,r0		/* writable if _RW & _DIRTY */
+	rlwimi	r5,r5,32-1,30,30	/* _PAGE_USER -> PP msb */
+	rlwimi	r5,r5,32-2,31,31	/* _PAGE_USER -> PP lsb */
 	ori	r8,r8,0xe04		/* clear out reserved bits */
 	andc	r8,r5,r8		/* PP = user? (rw&dirty? 2: 3): 0 */
 BEGIN_FTR_SECTION