Patchwork [3/4] powerpc/booke: Separate out restore_e5500/setup_e5500 routines.

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Submitter Varun Sethi
Date July 9, 2012, 1:01 p.m.
Message ID <1341838911-17157-1-git-send-email-Varun.Sethi@freescale.com>
Download mbox | patch
Permalink /patch/169813/
State New
Headers show

Comments

Varun Sethi - July 9, 2012, 1:01 p.m.
For the 64 bit case separate out e5500 cpu_setup and cpu_restore functions.
The cpu_setup function (for the primary core) is passed the cpu_spec pointer,
which is not there in case of the cpu_restore function. Also, in our case
we will have to manipulate the CPU_FTR_EMB_HV flag on the the primary core.  

Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
---
 arch/powerpc/kernel/cpu_setup_fsl_booke.S |   38 ++++++++++++++++++++++++----
 arch/powerpc/kernel/exceptions-64e.S      |   18 +------------
 2 files changed, 34 insertions(+), 22 deletions(-)
Kumar Gala - Aug. 3, 2012, 4:38 p.m.
On Jul 9, 2012, at 8:01 AM, Varun Sethi wrote:

> For the 64 bit case separate out e5500 cpu_setup and cpu_restore functions.
> The cpu_setup function (for the primary core) is passed the cpu_spec pointer,
> which is not there in case of the cpu_restore function. Also, in our case
> we will have to manipulate the CPU_FTR_EMB_HV flag on the the primary core.  
> 
> Signed-off-by: Varun Sethi <Varun.Sethi@freescale.com>
> ---
> arch/powerpc/kernel/cpu_setup_fsl_booke.S |   38 ++++++++++++++++++++++++----
> arch/powerpc/kernel/exceptions-64e.S      |   18 +------------
> 2 files changed, 34 insertions(+), 22 deletions(-)

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Patch

diff --git a/arch/powerpc/kernel/cpu_setup_fsl_booke.S b/arch/powerpc/kernel/cpu_setup_fsl_booke.S
index 5e87737..1345e1b 100644
--- a/arch/powerpc/kernel/cpu_setup_fsl_booke.S
+++ b/arch/powerpc/kernel/cpu_setup_fsl_booke.S
@@ -105,19 +105,45 @@  _GLOBAL(__setup_cpu_e5500)
 	mtlr	r5
 	blr
 #endif
-/* Right now, restore and setup are the same thing */
+
+#ifdef CONFIG_PPC_BOOK3E_64
 _GLOBAL(__restore_cpu_e5500)
-_GLOBAL(__setup_cpu_e5500)
 	mflr	r4
 	bl	__e500_icache_setup
 	bl	__e500_dcache_setup
-#ifdef CONFIG_PPC_BOOK3E_64
 	bl	.__setup_base_ivors
 	bl	.setup_perfmon_ivor
 	bl	.setup_doorbell_ivors
+	/*
+	 * We only want to touch IVOR38-41 if we're running on hardware
+	 * that supports category E.HV.  The architectural way to determine
+	 * this is MMUCFG[LPIDSIZE].
+	 */
+	mfspr	r10,SPRN_MMUCFG
+	rlwinm.	r10,r10,0,MMUCFG_LPIDSIZE
+	beq	1f
 	bl	.setup_ehv_ivors
-#else
-	bl	__setup_e500mc_ivors
-#endif
+1:
 	mtlr	r4
 	blr
+
+_GLOBAL(__setup_cpu_e5500)
+	mflr	r5
+	bl	__e500_icache_setup
+	bl	__e500_dcache_setup
+	bl	.__setup_base_ivors
+	bl	.setup_perfmon_ivor
+	bl	.setup_doorbell_ivors
+	/*
+	 * We only want to touch IVOR38-41 if we're running on hardware
+	 * that supports category E.HV.  The architectural way to determine
+	 * this is MMUCFG[LPIDSIZE].
+	 */
+	mfspr	r10,SPRN_MMUCFG
+	rlwinm.	r10,r10,0,MMUCFG_LPIDSIZE
+	beq	1f
+	bl	.setup_ehv_ivors
+1:
+	mtlr	r5
+	blr
+#endif
diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index 7215cc2..5f9ef1b 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -1302,25 +1302,11 @@  _GLOBAL(setup_perfmon_ivor)
 _GLOBAL(setup_doorbell_ivors)
 	SET_IVOR(36, 0x280) /* Processor Doorbell */
 	SET_IVOR(37, 0x2a0) /* Processor Doorbell Crit */
-
-	/* Check MMUCFG[LPIDSIZE] to determine if we have category E.HV */
-	mfspr	r10,SPRN_MMUCFG
-	rlwinm.	r10,r10,0,MMUCFG_LPIDSIZE
-	beqlr
-
-	SET_IVOR(38, 0x2c0) /* Guest Processor Doorbell */
-	SET_IVOR(39, 0x2e0) /* Guest Processor Doorbell Crit/MC */
 	blr
 
 _GLOBAL(setup_ehv_ivors)
-	/*
-	 * We may be running as a guest and lack E.HV even on a chip
-	 * that normally has it.
-	 */
-	mfspr	r10,SPRN_MMUCFG
-	rlwinm.	r10,r10,0,MMUCFG_LPIDSIZE
-	beqlr
-
 	SET_IVOR(40, 0x300) /* Embedded Hypervisor System Call */
 	SET_IVOR(41, 0x320) /* Embedded Hypervisor Privilege */
+	SET_IVOR(38, 0x2c0) /* Guest Processor Doorbell */
+	SET_IVOR(39, 0x2e0) /* Guest Processor Doorbell Crit/MC */
 	blr