Patchwork [1/6] 8xx: DTLB Error must check for more errors.

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Submitter Joakim Tjernlund
Date Oct. 5, 2009, 12:16 p.m.
Message ID <1254744999-3158-2-git-send-email-Joakim.Tjernlund@transmode.se>
Download mbox | patch
Permalink /patch/35001/
State Superseded
Headers show

Comments

Joakim Tjernlund - Oct. 5, 2009, 12:16 p.m.
DataTLBError currently does:
 if ((err & 0x02000000) == 0)
    DSI();
This won't handle a store with no valid translation.
Change this to
 if ((err & 0x48000000) != 0)
    DSI();
that is, branch to DSI if either !permission or
!translation.
---
 arch/powerpc/kernel/head_8xx.S |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

Patch

diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 52ff8c5..118bb05 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -472,8 +472,8 @@  DataTLBError:
 	/* First, make sure this was a store operation.
 	*/
 	mfspr	r10, SPRN_DSISR
-	andis.	r11, r10, 0x0200	/* If set, indicates store op */
-	beq	2f
+	andis.	r11, r10, 0x4800 /* no translation, no permission. */
+	bne	2f	/* branch if either is set */
 
 	/* The EA of a data TLB miss is automatically stored in the MD_EPN
 	 * register.  The EA of a data TLB error is automatically stored in