[PATCH 0/3] ARM changes for ScorpionMP support

[PATCH 0/3] ARM changes for ScorpionMP support

[Jeff Ohlstein]

These are low level changes needed to support targets based on Qualcomm's
ScorpionMP architecture.

Jeff Ohlstein (1):
  arm: Kconfig option for ARCH_MSM_SCORPIONMP

Steve Muckle (2):
  arm: mm: do not set missing flags on ScorpionMP
  arm: macros for wfe, sev instructions

 arch/arm/Kconfig                 |    5 +++--
 arch/arm/include/asm/processor.h |    5 +++++
 arch/arm/mach-msm/Kconfig        |    2 ++
 arch/arm/mm/proc-v7.S            |    2 +-
 4 files changed, 11 insertions(+), 3 deletions(-)

Sent by an employee of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 1/3] arm: Kconfig option for ARCH_MSM_SCORPIONMP

[Jeff Ohlstein]

ScorpionMP is a configuration of Scorpion processors. It supports SMP
and local timers.

Signed-off-by: Jeff Ohlstein <johlstei@codeaurora.org>
---
 arch/arm/Kconfig          |    5 +++--
 arch/arm/mach-msm/Kconfig |    2 ++
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 98922f7..08518ae 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1100,7 +1100,7 @@ config SMP
 	bool "Symmetric Multi-Processing (EXPERIMENTAL)"
 	depends on EXPERIMENTAL && (REALVIEW_EB_ARM11MP || REALVIEW_EB_A9MP ||\
 		 MACH_REALVIEW_PB11MP || MACH_REALVIEW_PBX || ARCH_OMAP4 ||\
-		 ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
+		 ARCH_U8500 || ARCH_VEXPRESS_CA9X4 || ARCH_MSM_SCORPIONMP)
 	depends on GENERIC_CLOCKEVENTS
 	select USE_GENERIC_SMP_HELPERS
 	select HAVE_ARM_SCU if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500 || ARCH_VEXPRESS_CA9X4)
@@ -1172,7 +1172,8 @@ config HOTPLUG_CPU
 config LOCAL_TIMERS
 	bool "Use local timer interrupts"
 	depends on SMP && (REALVIEW_EB_ARM11MP || MACH_REALVIEW_PB11MP || \
-		REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500)
+		REALVIEW_EB_A9MP || MACH_REALVIEW_PBX || ARCH_OMAP4 || ARCH_U8500 || \
+		ARCH_MSM_SCORPIONMP)
 	default y
 	select HAVE_ARM_TWD if (ARCH_REALVIEW || ARCH_OMAP4 || ARCH_U8500)
 	help
diff --git a/arch/arm/mach-msm/Kconfig b/arch/arm/mach-msm/Kconfig
index 47264a7..cc59b0c 100644
--- a/arch/arm/mach-msm/Kconfig
+++ b/arch/arm/mach-msm/Kconfig
@@ -35,6 +35,8 @@ config  ARCH_MSM_ARM11
 	bool
 config  ARCH_MSM_SCORPION
 	bool
+config  ARCH_MSM_SCORPIONMP
+	bool
 
 config  MSM_VIC
 	bool
-- 
1.7.1.1

[PATCH 2/3] arm: mm: do not set missing flags on ScorpionMP

[Jeff Ohlstein]

From: Steve Muckle <smuckle@codeaurora.org>

ScorpionMP does not have the SMP/nAMP mode and TLB ops
broadcasting bits in the ACTLR.

Signed-off-by: Steve Muckle <smuckle@codeaurora.org>
Signed-off-by: Jeff Ohlstein <johlstei@codeaurora.org>
---
 arch/arm/mm/proc-v7.S |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 7aaf88a..6bddf5d 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -190,7 +190,7 @@ cpu_v7_name:
  *	- cache type register is implemented
  */
 __v7_setup:
-#ifdef CONFIG_SMP
+#if defined(CONFIG_SMP) && !defined(CONFIG_ARCH_MSM_SCORPIONMP)
 	mrc	p15, 0, r0, c1, c0, 1
 	tst	r0, #(1 << 6)			@ SMP/nAMP mode enabled?
 	orreq	r0, r0, #(1 << 6) | (1 << 0)	@ Enable SMP/nAMP mode and
-- 
1.7.1.1

[PATCH 3/3] arm: macros for wfe, sev instructions

[Jeff Ohlstein]

From: Steve Muckle <smuckle@codeaurora.org>

The wait for event and send event instructions may be called from C code
such as boot or power management routines.

Signed-off-by: Steve Muckle <smuckle@codeaurora.org>
Signed-off-by: Jeff Ohlstein <johlstei@codeaurora.org>
---
 arch/arm/include/asm/processor.h |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/arch/arm/include/asm/processor.h b/arch/arm/include/asm/processor.h
index 7bed3da..4262664 100644
--- a/arch/arm/include/asm/processor.h
+++ b/arch/arm/include/asm/processor.h
@@ -97,6 +97,11 @@ unsigned long get_wchan(struct task_struct *p);
 #define cpu_relax()			barrier()
 #endif
 
+#if defined(CONFIG_CPU_32v6K) || __LINUX_ARM_ARCH__ >= 7
+#define sev() __asm__("sev")
+#define wfe() __asm__("wfe")
+#endif
+
 /*
  * Create a new kernel thread
  */
-- 
1.7.1.1

[PATCH 2/3] arm: mm: do not set missing flags on ScorpionMP

[Russell King - ARM Linux]

On Fri, Jul 23, 2010 at 11:58:02AM -0700, Jeff Ohlstein wrote:
> From: Steve Muckle <smuckle@codeaurora.org>
> 
> ScorpionMP does not have the SMP/nAMP mode and TLB ops
> broadcasting bits in the ACTLR.

Please provide a separate instance of __v7_proc_info for your processor
and direct it to jump into the __v7_setup code after this setup instead.

[PATCH 2/3] arm: mm: do not set missing flags on ScorpionMP

[Daniel Walker]

On Sat, 2010-07-24 at 09:23 +0100, Russell King - ARM Linux wrote:
> On Fri, Jul 23, 2010 at 11:58:02AM -0700, Jeff Ohlstein wrote:
> > From: Steve Muckle <smuckle@codeaurora.org>
> > 
> > ScorpionMP does not have the SMP/nAMP mode and TLB ops
> > broadcasting bits in the ACTLR.
> 
> Please provide a separate instance of __v7_proc_info for your processor
> and direct it to jump into the __v7_setup code after this setup instead.


You mean add another label into __v7_setup along with a proc-msm.S to
jump over this code?

Daniel
-- 
Sent by an consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 2/3] arm: mm: do not set missing flags on ScorpionMP

[Russell King - ARM Linux]

On Wed, Jul 28, 2010 at 02:58:00PM -0700, Daniel Walker wrote:
> On Sat, 2010-07-24 at 09:23 +0100, Russell King - ARM Linux wrote:
> > On Fri, Jul 23, 2010 at 11:58:02AM -0700, Jeff Ohlstein wrote:
> > > From: Steve Muckle <smuckle@codeaurora.org>
> > > 
> > > ScorpionMP does not have the SMP/nAMP mode and TLB ops
> > > broadcasting bits in the ACTLR.
> > 
> > Please provide a separate instance of __v7_proc_info for your processor
> > and direct it to jump into the __v7_setup code after this setup instead.
> 
> 
> You mean add another label into __v7_setup along with a proc-msm.S to
> jump over this code?

Yes to the first, no to the second.

__v7_setup:
#ifdef CONFIG_SMP
        mrc     p15, 0, r0, c1, c0, 1
        tst     r0, #(1 << 6)                   @ SMP/nAMP mode enabled?
        orreq   r0, r0, #(1 << 6) | (1 << 0)    @ Enable SMP/nAMP mode and
        mcreq   p15, 0, r0, c1, c0, 1           @ TLB ops broadcasting
#endif
__v7_msm_setup:
	...

        .section ".proc.info.init", #alloc, #execinstr

	.type	__v7_msm_proc_info, #object
__v7_msm_proc_info:
	.long	...
	.long	...
	...
	b	__v7_msm_setup
	...

        /*
         * Match any ARMv7 processor core.
         */
        .type   __v7_proc_info, #object
__v7_proc_info:
	...

[PATCH 2/3] arm: mm: do not set missing flags on ScorpionMP

[Daniel Walker]

On Wed, 2010-07-28 at 23:36 +0100, Russell King - ARM Linux wrote:
> On Wed, Jul 28, 2010 at 02:58:00PM -0700, Daniel Walker wrote:
> > On Sat, 2010-07-24 at 09:23 +0100, Russell King - ARM Linux wrote:
> > > On Fri, Jul 23, 2010 at 11:58:02AM -0700, Jeff Ohlstein wrote:
> > > > From: Steve Muckle <smuckle@codeaurora.org>
> > > > 
> > > > ScorpionMP does not have the SMP/nAMP mode and TLB ops
> > > > broadcasting bits in the ACTLR.
> > > 
> > > Please provide a separate instance of __v7_proc_info for your processor
> > > and direct it to jump into the __v7_setup code after this setup instead.
> > 
> > 
> > You mean add another label into __v7_setup along with a proc-msm.S to
> > jump over this code?
> 
> Yes to the first, no to the second.
> 

Like so? I haven't tested this.

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 6bddf5d..167bedb 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -196,6 +196,7 @@ __v7_setup:
 	orreq	r0, r0, #(1 << 6) | (1 << 0)	@ Enable SMP/nAMP mode and
 	mcreq	p15, 0, r0, c1, c0, 1		@ TLB ops broadcasting
 #endif
+__v7_msm_setup:
 	adr	r12, __v7_setup_stack		@ the local stack
 	stmia	r12, {r0-r5, r7, r9, r11, lr}
 	bl	v7_flush_dcache_all
@@ -326,6 +327,29 @@ cpu_elf_name:
 
 	.section ".proc.info.init", #alloc, #execinstr
 
+	.type   __v7_msm_proc_info, #object
+__v7_msm_proc_info:
+	.long	0x000f0000		@ Required ID value
+	.long	0x000f0000		@ Mask for ID
+	.long   PMD_TYPE_SECT | \
+		PMD_SECT_AP_WRITE | \
+		PMD_SECT_AP_READ | \
+		PMD_FLAGS
+	.long   PMD_TYPE_SECT | \
+		PMD_SECT_XN | \
+		PMD_SECT_AP_WRITE | \
+		PMD_SECT_AP_READ
+	b	__v7_msm_setup
+	.long	cpu_arch_name
+	.long	cpu_elf_name
+	.long	HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP
+	.long	cpu_v7_name
+	.long	v7_processor_functions
+	.long	v7wbi_tlb_fns
+	.long	v6_user_fns
+	.long	v7_cache_fns
+	.size	__v7_msm_proc_info, . - __v7_msm_proc_info
+
 	/*
 	 * Match any ARMv7 processor core.
 	 */


-- 
Sent by an consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 2/3] arm: mm: do not set missing flags on ScorpionMP

[Russell King - ARM Linux]

On Wed, Jul 28, 2010 at 03:51:35PM -0700, Daniel Walker wrote:
> @@ -326,6 +327,29 @@ cpu_elf_name:
>  
>  	.section ".proc.info.init", #alloc, #execinstr
>  
> +	.type   __v7_msm_proc_info, #object
> +__v7_msm_proc_info:
> +	.long	0x000f0000		@ Required ID value
> +	.long	0x000f0000		@ Mask for ID

Almost - is there no more specific ID value for your CPU?

[PATCH 2/3] arm: mm: do not set missing flags on ScorpionMP

[Daniel Walker]

On Thu, 2010-07-29 at 08:18 +0100, Russell King - ARM Linux wrote:
> On Wed, Jul 28, 2010 at 03:51:35PM -0700, Daniel Walker wrote:
> > @@ -326,6 +327,29 @@ cpu_elf_name:
> >  
> >  	.section ".proc.info.init", #alloc, #execinstr
> >  
> > +	.type   __v7_msm_proc_info, #object
> > +__v7_msm_proc_info:
> > +	.long	0x000f0000		@ Required ID value
> > +	.long	0x000f0000		@ Mask for ID
> 
> Almost - is there no more specific ID value for your CPU?

Here's one with a more specific cpu id. Would you be willing to take
this for 2.6.36 or are you pretty much done taking pull requests?

Daniel

diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 6bddf5d..a5b613d 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -196,6 +196,7 @@ __v7_setup:
 	orreq	r0, r0, #(1 << 6) | (1 << 0)	@ Enable SMP/nAMP mode and
 	mcreq	p15, 0, r0, c1, c0, 1		@ TLB ops broadcasting
 #endif
+__v7_msm_setup:
 	adr	r12, __v7_setup_stack		@ the local stack
 	stmia	r12, {r0-r5, r7, r9, r11, lr}
 	bl	v7_flush_dcache_all
@@ -326,6 +327,29 @@ cpu_elf_name:
 
 	.section ".proc.info.init", #alloc, #execinstr
 
+	.type   __v7_msm_proc_info, #object
+__v7_msm_proc_info:
+	.long	0x510f0000		@ Required ID value
+	.long	0xff0f0000		@ Mask for ID
+	.long   PMD_TYPE_SECT | \
+		PMD_SECT_AP_WRITE | \
+		PMD_SECT_AP_READ | \
+		PMD_FLAGS
+	.long   PMD_TYPE_SECT | \
+		PMD_SECT_XN | \
+		PMD_SECT_AP_WRITE | \
+		PMD_SECT_AP_READ
+	b	__v7_msm_setup
+	.long	cpu_arch_name
+	.long	cpu_elf_name
+	.long	HWCAP_SWP|HWCAP_HALF|HWCAP_THUMB|HWCAP_FAST_MULT|HWCAP_EDSP
+	.long	cpu_v7_name
+	.long	v7_processor_functions
+	.long	v7wbi_tlb_fns
+	.long	v6_user_fns
+	.long	v7_cache_fns
+	.size	__v7_msm_proc_info, . - __v7_msm_proc_info
+
 	/*
 	 * Match any ARMv7 processor core.
 	 */

-- 
Sent by an consultant of the Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.

[PATCH 2/3] arm: mm: do not set missing flags on ScorpionMP

[Russell King - ARM Linux]

On Thu, Jul 29, 2010 at 03:42:46PM -0700, Daniel Walker wrote:
> On Thu, 2010-07-29 at 08:18 +0100, Russell King - ARM Linux wrote:
> > On Wed, Jul 28, 2010 at 03:51:35PM -0700, Daniel Walker wrote:
> > > @@ -326,6 +327,29 @@ cpu_elf_name:
> > >  
> > >  	.section ".proc.info.init", #alloc, #execinstr
> > >  
> > > +	.type   __v7_msm_proc_info, #object
> > > +__v7_msm_proc_info:
> > > +	.long	0x000f0000		@ Required ID value
> > > +	.long	0x000f0000		@ Mask for ID
> > 
> > Almost - is there no more specific ID value for your CPU?
> 
> Here's one with a more specific cpu id. Would you be willing to take
> this for 2.6.36 or are you pretty much done taking pull requests?

Yes, but if its just for this patch, is there much point to a pull
request?

[PATCH 2/3] arm: mm: do not set missing flags on ScorpionMP

[Daniel Walker]

On Fri, 2010-07-30 at 08:19 +0100, Russell King - ARM Linux wrote:
> On Thu, Jul 29, 2010 at 03:42:46PM -0700, Daniel Walker wrote:
> > On Thu, 2010-07-29 at 08:18 +0100, Russell King - ARM Linux wrote:
> > > On Wed, Jul 28, 2010 at 03:51:35PM -0700, Daniel Walker wrote:
> > > > @@ -326,6 +327,29 @@ cpu_elf_name:
> > > >  
> > > >  	.section ".proc.info.init", #alloc, #execinstr
> > > >  
> > > > +	.type   __v7_msm_proc_info, #object
> > > > +__v7_msm_proc_info:
> > > > +	.long	0x000f0000		@ Required ID value
> > > > +	.long	0x000f0000		@ Mask for ID
> > > 
> > > Almost - is there no more specific ID value for your CPU?
> > 
> > Here's one with a more specific cpu id. Would you be willing to take
> > this for 2.6.36 or are you pretty much done taking pull requests?
> 
> Yes, but if its just for this patch, is there much point to a pull
> request?

I've got some other stuff too .. Jeff Ohlstein sent several patches (one
of which started this discussion), which are needed for an SMP board
we've been working on.

Daniel

[PATCH 2/3] arm: mm: do not set missing flags on ScorpionMP

[Russell King - ARM Linux]

On Fri, Jul 30, 2010 at 10:09:37AM -0700, Daniel Walker wrote:
> On Fri, 2010-07-30 at 08:19 +0100, Russell King - ARM Linux wrote:
> > Yes, but if its just for this patch, is there much point to a pull
> > request?
> 
> I've got some other stuff too .. Jeff Ohlstein sent several patches (one
> of which started this discussion), which are needed for an SMP board
> we've been working on.

Has it been seen on the mailing list?

[PATCH 2/3] arm: mm: do not set missing flags on ScorpionMP

[Daniel Walker]

On Fri, 2010-07-30 at 21:20 +0100, Russell King - ARM Linux wrote:
> On Fri, Jul 30, 2010 at 10:09:37AM -0700, Daniel Walker wrote:
> > On Fri, 2010-07-30 at 08:19 +0100, Russell King - ARM Linux wrote:
> > > Yes, but if its just for this patch, is there much point to a pull
> > > request?
> > 
> > I've got some other stuff too .. Jeff Ohlstein sent several patches (one
> > of which started this discussion), which are needed for an SMP board
> > we've been working on.
> 
> Has it been seen on the mailing list?

Yes, this series

http://www.acetylcholine.com/node/92578

except the 3/3 patch .. There was also a GIC fix patch,

http://www.gossamer-threads.com/lists/linux/kernel/1254644

Daniel