diff mbox

[2/3] 8xx: Support LARGE pages in TLB code.

Message ID 1318246714-5015-3-git-send-email-Joakim.Tjernlund@transmode.se (mailing list archive)
State Not Applicable
Headers show

Commit Message

Joakim Tjernlund Oct. 10, 2011, 11:38 a.m. UTC 
Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
---
 arch/ppc/kernel/head_8xx.S |   22 +++++++++++++++-------
 1 files changed, 15 insertions(+), 7 deletions(-)
diff mbox

Patch

diff --git a/arch/ppc/kernel/head_8xx.S b/arch/ppc/kernel/head_8xx.S
index 8e3fe40..439e7f2 100644
--- a/arch/ppc/kernel/head_8xx.S
+++ b/arch/ppc/kernel/head_8xx.S
@@ -368,15 +368,19 @@  InstructionTLBMiss:
 	 * for this "segment."
 	 */
 	tophys(r21,r21)
-	ori	r21,r21,1		/* Set valid bit */
-	DO_8xx_CPU6(0x2b80, r3)
-	mtspr	MI_TWC, r21	/* Set segment attributes */
 	beq-	2f		/* If zero, don't try to find a pte */
 	DO_8xx_CPU6(0x3b80, r3)
 	mtspr	MD_TWC, r21	/* Load pte table base address */
-	mfspr	r21, MD_TWC	/* ....and get the pte address */
-	lwz	r20, 0(r21)	/* Get the pte */
+	mfspr	r20, MD_TWC	/* ....and get the pte address */
+	lwz	r20, 0(r20)	/* Get the pte */
+
+	ori	r21, r21, MI_SVALID	/* Set valid bit */
+	/* Copy PSE to PS bits(8MB) */
+	rlwimi	r21, r20, 0, _PAGE_PSE
+	rlwimi	r21, r20, 32-1, _PAGE_PSE>>1
 
+	DO_8xx_CPU6(0x2b80, r3)
+	mtspr	MI_TWC, r21	/* Set segment attributes */
 #ifndef NO_SWAP
 	/* if !swap, you can delete this */
 	andi.	r21, r20, _PAGE_ACCESSED	/* test ACCESSED bit */
@@ -446,7 +450,9 @@  DataStoreTLBMiss:
 	 * this into the Linux pgd/pmd and load it in the operation
 	 * above.
 	 */
-	rlwimi	r21, r20, 0, _PAGE_GUARDED
+	rlwimi	r21, r20, 0, _PAGE_GUARDED | _PAGE_PSE
+	/* Copy PSE to PS bits(8MB), combine with GUARDED above */
+	rlwimi	r21, r20, 32-1, _PAGE_PSE>>1
 	/* Insert the WriteThru flag into the TWC from the Linux PTE.
 	 * It is bit 25 in the Linux PTE and bit 30 in the TWC
 	 */
@@ -589,7 +595,9 @@  DARFixed:
 	/* Insert the Guarded flag into the TWC from the Linux PTE.
 	 * It is bit 27 of both the Linux PTE and the TWC
 	 */
-	rlwimi	r21, r20, 0, _PAGE_GUARDED
+	rlwimi	r21, r20, 0, _PAGE_GUARDED | _PAGE_PSE
+	/* Copy PSE to PS bits(8MB), combine with GUARDED above */
+	rlwimi	r21, r20, 32-1, _PAGE_PSE>>1
 	/* Insert the WriteThru flag into the TWC from the Linux PTE.
 	 * It is bit 25 in the Linux PTE and bit 30 in the TWC
 	 */