[PATCH] powerpc/ppc: Add missing isyncs in head_fsl_booke.S

[Becky Bruce]

The e500 core reference manual indicates that isync is required
after mtmsr(DE bit) and mtspr DBCR0.  Add isyncs to make the code
conform to the spec.

Signed-off-by: Becky Bruce <becky.bruce at freescale.com>
Signed-off-by: Kumar Gala <galak at kernel.crashing.org>

---
commit b9c7e75735829b3dc3d6ba3afa715896d96f1093
tree 08700b171fc4d8ddc6b42e9650261e5f735ebec8
parent 0ebd6b01576657e51c6023803f2de1d1181b67b9
author Becky Bruce <becky.bruce at freescale.com> Wed, 08 Feb 2006 16:29:50 -0600
committer Becky Bruce <becky.bruce at freescale.com> Wed, 08 Feb 2006 16:29:50 -0600

 arch/powerpc/kernel/head_fsl_booke.S |    4 ++++
 arch/ppc/kernel/head_fsl_booke.S     |    4 ++++
 2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 8d60fa9..0abd05f 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -316,6 +316,7 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	 */
 	lis	r2,DBCR0_IDM at h
 	mtspr	SPRN_DBCR0,r2
+	isync
 	/* clear any residual debug events */
 	li	r2,-1
 	mtspr	SPRN_DBSR,r2
@@ -1002,12 +1003,15 @@ _GLOBAL(giveup_fpu)
 _GLOBAL(abort)
 	li	r13,0
         mtspr   SPRN_DBCR0,r13		/* disable all debug events */
+	isync
 	mfmsr	r13
 	ori	r13,r13,MSR_DE at l	/* Enable Debug Events */
 	mtmsr	r13
+	isync
         mfspr   r13,SPRN_DBCR0
         lis	r13,(DBCR0_IDM|DBCR0_RST_CHIP)@h
         mtspr   SPRN_DBCR0,r13
+	isync
 
 _GLOBAL(set_context)
 
diff --git a/arch/ppc/kernel/head_fsl_booke.S b/arch/ppc/kernel/head_fsl_booke.S
index 8d60fa9..0abd05f 100644
--- a/arch/ppc/kernel/head_fsl_booke.S
+++ b/arch/ppc/kernel/head_fsl_booke.S
@@ -316,6 +316,7 @@ skpinv:	addi	r6,r6,1				/* Increment */
 	 */
 	lis	r2,DBCR0_IDM at h
 	mtspr	SPRN_DBCR0,r2
+	isync
 	/* clear any residual debug events */
 	li	r2,-1
 	mtspr	SPRN_DBSR,r2
@@ -1002,12 +1003,15 @@ _GLOBAL(giveup_fpu)
 _GLOBAL(abort)
 	li	r13,0
         mtspr   SPRN_DBCR0,r13		/* disable all debug events */
+	isync
 	mfmsr	r13
 	ori	r13,r13,MSR_DE at l	/* Enable Debug Events */
 	mtmsr	r13
+	isync
         mfspr   r13,SPRN_DBCR0
         lis	r13,(DBCR0_IDM|DBCR0_RST_CHIP)@h
         mtspr   SPRN_DBCR0,r13
+	isync
 
 _GLOBAL(set_context)