[PATCH 1/2] ARM: implement recommended WAR for errata 709718

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* [PATCH 1/2] ARM: implement recommended WAR for errata 709718
@ 2014-11-06 11:23 Lucas Stach
  2014-11-06 11:23 ` [PATCH 2/2] ARM: imx5: add imx5_cpu_lowlevel_init and use in all boards Lucas Stach
                   ` (2 more replies)
  0 siblings, 3 replies; 8+ messages in thread
From: Lucas Stach @ 2014-11-06 11:23 UTC (permalink / raw)
  To: barebox

ARM Cortex A8 errata 709718:
"Load and store operations to shared device memory
regions may not complete in program order"

We implement the recommended workaround in the bootloader
as it must be applied before enabling the MMU for the
first time.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
 arch/arm/include/asm/errata.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/include/asm/errata.h b/arch/arm/include/asm/errata.h
index e2ffd87360c0..9525823e4ca8 100644
--- a/arch/arm/include/asm/errata.h
+++ b/arch/arm/include/asm/errata.h
@@ -12,6 +12,18 @@
  * GNU General Public License for more details.
  */
 
+static inline void enable_arm_errata_709718_war(void)
+{
+	__asm__ __volatile__ (
+		"mrc	p15, 0, r0, c10, c2, 0\n"
+		"bic	r0, #3 << 16\n"
+		"mcr	p15, 0, r0, c10, c2, 0\n"
+		"mrc	p15, 0, r0, c1, c0, 0\n"
+		"orr	r0, r0, #1 << 28\n"
+		"mcr	p15, 0, r0, c1, c0, 0\n"
+	);
+}
+
 static inline void enable_arm_errata_716044_war(void)
 {
 	__asm__ __volatile__ (
-- 
2.1.1


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* [PATCH 2/2] ARM: imx5: add imx5_cpu_lowlevel_init and use in all boards
  2014-11-06 11:23 [PATCH 1/2] ARM: implement recommended WAR for errata 709718 Lucas Stach
@ 2014-11-06 11:23 ` Lucas Stach
  2014-11-11 13:51   ` Andreas Pretzsch
  2014-11-06 12:20 ` [PATCH 1/2] ARM: implement recommended WAR for errata 709718 Holger Schurig
  2014-11-07  6:55 ` Sascha Hauer
  2 siblings, 1 reply; 8+ messages in thread
From: Lucas Stach @ 2014-11-06 11:23 UTC (permalink / raw)
  To: barebox

This is similar to what we do on imx6 and makes sure we
apply the errata workarounds early.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
---
 arch/arm/boards/ccxmx51/lowlevel.c                | 3 ++-
 arch/arm/boards/efika-mx-smartbook/lowlevel.c     | 3 ++-
 arch/arm/boards/eukrea_cpuimx51/lowlevel.c        | 3 ++-
 arch/arm/boards/freescale-mx51-babbage/lowlevel.c | 3 ++-
 arch/arm/boards/freescale-mx53-qsb/lowlevel.c     | 5 +++--
 arch/arm/boards/freescale-mx53-smd/lowlevel.c     | 3 ++-
 arch/arm/boards/freescale-mx53-vmx53/lowlevel.c   | 3 ++-
 arch/arm/boards/guf-vincell/lowlevel.c            | 3 ++-
 arch/arm/boards/karo-tx51/lowlevel.c              | 3 ++-
 arch/arm/boards/karo-tx53/lowlevel.c              | 3 ++-
 arch/arm/boards/tqma53/lowlevel.c                 | 5 +++--
 arch/arm/mach-imx/cpu_init.c                      | 7 +++++++
 arch/arm/mach-imx/include/mach/generic.h          | 1 +
 13 files changed, 32 insertions(+), 13 deletions(-)

diff --git a/arch/arm/boards/ccxmx51/lowlevel.c b/arch/arm/boards/ccxmx51/lowlevel.c
index 3e67b314a791..2b3dc42e87c5 100644
--- a/arch/arm/boards/ccxmx51/lowlevel.c
+++ b/arch/arm/boards/ccxmx51/lowlevel.c
@@ -1,11 +1,12 @@
 #include <common.h>
 #include <mach/esdctl.h>
+#include <mach/generic.h>
 #include <asm/barebox-arm.h>
 #include <asm/barebox-arm-head.h>
 #include <mach/imx51-regs.h>
 
 void __naked barebox_arm_reset_vector(void)
 {
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 	barebox_arm_entry(MX51_CSD0_BASE_ADDR, SZ_128M, NULL);
 }
diff --git a/arch/arm/boards/efika-mx-smartbook/lowlevel.c b/arch/arm/boards/efika-mx-smartbook/lowlevel.c
index 0d32eee860e4..52454c7d5045 100644
--- a/arch/arm/boards/efika-mx-smartbook/lowlevel.c
+++ b/arch/arm/boards/efika-mx-smartbook/lowlevel.c
@@ -1,5 +1,6 @@
 #include <common.h>
 #include <mach/esdctl.h>
+#include <mach/generic.h>
 #include <asm/barebox-arm-head.h>
 #include <asm/barebox-arm.h>
 #include <mach/imx5.h>
@@ -10,7 +11,7 @@ ENTRY_FUNCTION(start_imx51_genesi_efikasb, r0, r1, r2)
 {
 	void *fdt;
 
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 	arm_setup_stack(0x20000000 - 16);
 	imx51_init_lowlevel(800);
 
diff --git a/arch/arm/boards/eukrea_cpuimx51/lowlevel.c b/arch/arm/boards/eukrea_cpuimx51/lowlevel.c
index c3f7b4acbb46..7a85b489d2e3 100644
--- a/arch/arm/boards/eukrea_cpuimx51/lowlevel.c
+++ b/arch/arm/boards/eukrea_cpuimx51/lowlevel.c
@@ -1,9 +1,10 @@
 #include <common.h>
 #include <mach/esdctl.h>
+#include <mach/generic.h>
 #include <asm/barebox-arm-head.h>
 
 void __naked barebox_arm_reset_vector(void)
 {
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 	imx51_barebox_entry(NULL);
 }
diff --git a/arch/arm/boards/freescale-mx51-babbage/lowlevel.c b/arch/arm/boards/freescale-mx51-babbage/lowlevel.c
index 5a5a83c436cd..1b9ba16ef6b5 100644
--- a/arch/arm/boards/freescale-mx51-babbage/lowlevel.c
+++ b/arch/arm/boards/freescale-mx51-babbage/lowlevel.c
@@ -1,5 +1,6 @@
 #include <common.h>
 #include <mach/esdctl.h>
+#include <mach/generic.h>
 #include <asm/barebox-arm-head.h>
 #include <asm/barebox-arm.h>
 
@@ -9,7 +10,7 @@ ENTRY_FUNCTION(start_imx51_babbage, r0, r1, r2)
 {
 	void *fdt;
 
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 
 	fdt = __dtb_imx51_babbage_start - get_runtime_offset();
 
diff --git a/arch/arm/boards/freescale-mx53-qsb/lowlevel.c b/arch/arm/boards/freescale-mx53-qsb/lowlevel.c
index 7d1c1d5b2a16..aff6e3bc544c 100644
--- a/arch/arm/boards/freescale-mx53-qsb/lowlevel.c
+++ b/arch/arm/boards/freescale-mx53-qsb/lowlevel.c
@@ -1,5 +1,6 @@
 #include <common.h>
 #include <mach/esdctl.h>
+#include <mach/generic.h>
 #include <asm/barebox-arm-head.h>
 #include <asm/barebox-arm.h>
 #include <image-metadata.h>
@@ -10,7 +11,7 @@ ENTRY_FUNCTION(start_imx53_loco, r0, r1, r2)
 {
 	void *fdt;
 
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 
 	fdt = __dtb_imx53_qsb_start - get_runtime_offset();
 
@@ -23,7 +24,7 @@ ENTRY_FUNCTION(start_imx53_loco_r, r0, r1, r2)
 {
 	void *fdt;
 
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 
 	fdt = __dtb_imx53_qsrb_start - get_runtime_offset();
 
diff --git a/arch/arm/boards/freescale-mx53-smd/lowlevel.c b/arch/arm/boards/freescale-mx53-smd/lowlevel.c
index 1db07e2e2c6c..306db09acfec 100644
--- a/arch/arm/boards/freescale-mx53-smd/lowlevel.c
+++ b/arch/arm/boards/freescale-mx53-smd/lowlevel.c
@@ -1,9 +1,10 @@
 #include <common.h>
 #include <mach/esdctl.h>
+#include <mach/generic.h>
 #include <asm/barebox-arm-head.h>
 
 void __naked barebox_arm_reset_vector(void)
 {
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 	imx53_barebox_entry(NULL);
 }
diff --git a/arch/arm/boards/freescale-mx53-vmx53/lowlevel.c b/arch/arm/boards/freescale-mx53-vmx53/lowlevel.c
index 4054fd51e255..487a9fd899e4 100644
--- a/arch/arm/boards/freescale-mx53-vmx53/lowlevel.c
+++ b/arch/arm/boards/freescale-mx53-vmx53/lowlevel.c
@@ -1,5 +1,6 @@
 #include <common.h>
 #include <mach/esdctl.h>
+#include <mach/generic.h>
 #include <asm/barebox-arm-head.h>
 #include <asm/barebox-arm.h>
 
@@ -9,7 +10,7 @@ ENTRY_FUNCTION(start_imx53_vmx53, r0, r1, r2)
 {
 	void *fdt;
 
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 
 	fdt = __dtb_imx53_voipac_bsb_start - get_runtime_offset();
 
diff --git a/arch/arm/boards/guf-vincell/lowlevel.c b/arch/arm/boards/guf-vincell/lowlevel.c
index 186c0d9dd02e..00e34fba39f4 100644
--- a/arch/arm/boards/guf-vincell/lowlevel.c
+++ b/arch/arm/boards/guf-vincell/lowlevel.c
@@ -6,6 +6,7 @@
 #include <mach/iomux-v3.h>
 #include <mach/esdctl-v4.h>
 #include <mach/esdctl.h>
+#include <mach/generic.h>
 #include <asm/barebox-arm.h>
 #include <asm/barebox-arm-head.h>
 #include <io.h>
@@ -127,7 +128,7 @@ void __bare_init __naked barebox_arm_reset_vector(void)
 {
 	u32 r;
 
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 
 	/* Skip SDRAM initialization if we run from RAM */
 	r = get_pc();
diff --git a/arch/arm/boards/karo-tx51/lowlevel.c b/arch/arm/boards/karo-tx51/lowlevel.c
index c3f7b4acbb46..7a85b489d2e3 100644
--- a/arch/arm/boards/karo-tx51/lowlevel.c
+++ b/arch/arm/boards/karo-tx51/lowlevel.c
@@ -1,9 +1,10 @@
 #include <common.h>
 #include <mach/esdctl.h>
+#include <mach/generic.h>
 #include <asm/barebox-arm-head.h>
 
 void __naked barebox_arm_reset_vector(void)
 {
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 	imx51_barebox_entry(NULL);
 }
diff --git a/arch/arm/boards/karo-tx53/lowlevel.c b/arch/arm/boards/karo-tx53/lowlevel.c
index d82e6669b009..8adbd8d66604 100644
--- a/arch/arm/boards/karo-tx53/lowlevel.c
+++ b/arch/arm/boards/karo-tx53/lowlevel.c
@@ -3,10 +3,11 @@
 #include <asm/barebox-arm.h>
 #include <mach/imx5.h>
 #include <mach/esdctl.h>
+#include <mach/generic.h>
 
 void __naked barebox_arm_reset_vector(void)
 {
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 
 	/*
 	 * For the TX53 rev 8030 the SDRAM setup is not stable without
diff --git a/arch/arm/boards/tqma53/lowlevel.c b/arch/arm/boards/tqma53/lowlevel.c
index cd8721255590..4e129e49f6ab 100644
--- a/arch/arm/boards/tqma53/lowlevel.c
+++ b/arch/arm/boards/tqma53/lowlevel.c
@@ -5,6 +5,7 @@
 #include <asm/barebox-arm-head.h>
 #include <asm/barebox-arm.h>
 #include <mach/imx5.h>
+#include <mach/generic.h>
 #include <image-metadata.h>
 
 extern char __dtb_imx53_mba53_start[];
@@ -41,7 +42,7 @@ ENTRY_FUNCTION(start_imx53_mba53_512mib, r0, r1, r2)
 {
 	void *fdt;
 
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 
 	arm_setup_stack(0xf8020000 - 8);
 
@@ -60,7 +61,7 @@ ENTRY_FUNCTION(start_imx53_mba53_1gib, r0, r1, r2)
 {
 	void *fdt;
 
-	arm_cpu_lowlevel_init();
+	imx5_cpu_lowlevel_init();
 
 	arm_setup_stack(0xf8020000 - 8);
 
diff --git a/arch/arm/mach-imx/cpu_init.c b/arch/arm/mach-imx/cpu_init.c
index 68eacf7a6020..8b10e63ade80 100644
--- a/arch/arm/mach-imx/cpu_init.c
+++ b/arch/arm/mach-imx/cpu_init.c
@@ -15,6 +15,13 @@
 #include <asm/barebox-arm-head.h>
 #include <asm/errata.h>
 
+void imx5_cpu_lowlevel_init(void)
+{
+	arm_cpu_lowlevel_init();
+
+	enable_arm_errata_709718_war();
+}
+
 void imx6_cpu_lowlevel_init(void)
 {
 	arm_cpu_lowlevel_init();
diff --git a/arch/arm/mach-imx/include/mach/generic.h b/arch/arm/mach-imx/include/mach/generic.h
index 505a54268d94..d4b6a1f7b4fd 100644
--- a/arch/arm/mach-imx/include/mach/generic.h
+++ b/arch/arm/mach-imx/include/mach/generic.h
@@ -33,6 +33,7 @@ int imx51_devices_init(void);
 int imx53_devices_init(void);
 int imx6_devices_init(void);
 
+void imx5_cpu_lowlevel_init(void);
 void imx6_cpu_lowlevel_init(void);
 
 /* There's a off-by-one betweem the gpio bank number and the gpiochip */
-- 
2.1.1


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^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [PATCH 2/2] ARM: imx5: add imx5_cpu_lowlevel_init and use in all boards
  2014-11-06 11:23 ` [PATCH 2/2] ARM: imx5: add imx5_cpu_lowlevel_init and use in all boards Lucas Stach
@ 2014-11-11 13:51   ` Andreas Pretzsch
  2014-11-11 14:01     ` Lucas Stach
  0 siblings, 1 reply; 8+ messages in thread
From: Andreas Pretzsch @ 2014-11-11 13:51 UTC (permalink / raw)
  To: Lucas Stach; +Cc: barebox

On Do, 2014-11-06 at 12:23 +0100, Lucas Stach wrote:
> This is similar to what we do on imx6 and makes sure we
> apply the errata workarounds early.

Without checking, doesn't this also apply to other Cortex-A8, like the
TI AM335x and OMAP3 chips ?

Reading "ARM Cortex A8 errata" raises this thought...

-- 

carpe noctem engineering
Ingenieurbuero fuer Hard- & Software-Entwicklung Andreas Pretzsch
Dipl.-Ing. (FH) Andreas Pretzsch          Tel. +49-(0)731-5521572
Hahnengasse 3                             Fax: +49-(0)731-5521571
89073 Ulm, Germany                        email: apr@cn-eng.de

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* Re: [PATCH 2/2] ARM: imx5: add imx5_cpu_lowlevel_init and use in all boards
  2014-11-11 13:51   ` Andreas Pretzsch
@ 2014-11-11 14:01     ` Lucas Stach
  0 siblings, 0 replies; 8+ messages in thread
From: Lucas Stach @ 2014-11-11 14:01 UTC (permalink / raw)
  To: Andreas Pretzsch; +Cc: barebox

Am Dienstag, den 11.11.2014, 14:51 +0100 schrieb Andreas Pretzsch:
> On Do, 2014-11-06 at 12:23 +0100, Lucas Stach wrote:
> > This is similar to what we do on imx6 and makes sure we
> > apply the errata workarounds early.
> 
> Without checking, doesn't this also apply to other Cortex-A8, like the
> TI AM335x and OMAP3 chips ?
> 
> Reading "ARM Cortex A8 errata" raises this thought...
> 
I don't know exactly for the OMAP3 chips, but at least AM335x production
silicon has r3p2 of the Cortex-A8 where this errata is already fixed in
hardware.

Regards,
Lucas

-- 
Pengutronix e.K.             | Lucas Stach                 |
Industrial Linux Solutions   | http://www.pengutronix.de/  |


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* Re: [PATCH 1/2] ARM: implement recommended WAR for errata 709718
  2014-11-06 11:23 [PATCH 1/2] ARM: implement recommended WAR for errata 709718 Lucas Stach
  2014-11-06 11:23 ` [PATCH 2/2] ARM: imx5: add imx5_cpu_lowlevel_init and use in all boards Lucas Stach
@ 2014-11-06 12:20 ` Holger Schurig
  2014-11-06 12:44   ` Lucas Stach
  2014-11-06 12:46   ` Eric Bénard
  2014-11-07  6:55 ` Sascha Hauer
  2 siblings, 2 replies; 8+ messages in thread
From: Holger Schurig @ 2014-11-06 12:20 UTC (permalink / raw)
  To: Lucas Stach; +Cc: barebox

Hmm, you define the function in your patch, but where is it called?

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* Re: [PATCH 1/2] ARM: implement recommended WAR for errata 709718
  2014-11-06 12:20 ` [PATCH 1/2] ARM: implement recommended WAR for errata 709718 Holger Schurig
@ 2014-11-06 12:44   ` Lucas Stach
  2014-11-06 12:46   ` Eric Bénard
  1 sibling, 0 replies; 8+ messages in thread
From: Lucas Stach @ 2014-11-06 12:44 UTC (permalink / raw)
  To: Holger Schurig; +Cc: barebox

Am Donnerstag, den 06.11.2014, 13:20 +0100 schrieb Holger Schurig:
> Hmm, you define the function in your patch, but where is it called?

Next patch, that's why it is a series. :)

Regards,
Lucas
-- 
Pengutronix e.K.             | Lucas Stach                 |
Industrial Linux Solutions   | http://www.pengutronix.de/  |


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^ permalink raw reply	[flat|nested] 8+ messages in thread

* Re: [PATCH 1/2] ARM: implement recommended WAR for errata 709718
  2014-11-06 12:20 ` [PATCH 1/2] ARM: implement recommended WAR for errata 709718 Holger Schurig
  2014-11-06 12:44   ` Lucas Stach
@ 2014-11-06 12:46   ` Eric Bénard
  1 sibling, 0 replies; 8+ messages in thread
From: Eric Bénard @ 2014-11-06 12:46 UTC (permalink / raw)
  To: Holger Schurig; +Cc: barebox

Hi Holger,

Le Thu, 6 Nov 2014 13:20:12 +0100,
Holger Schurig <holgerschurig@gmail.com> a écrit :

> Hmm, you define the function in your patch, but where is it called?
> 
check patch 2/2 ;-)

Eric

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* Re: [PATCH 1/2] ARM: implement recommended WAR for errata 709718
  2014-11-06 11:23 [PATCH 1/2] ARM: implement recommended WAR for errata 709718 Lucas Stach
  2014-11-06 11:23 ` [PATCH 2/2] ARM: imx5: add imx5_cpu_lowlevel_init and use in all boards Lucas Stach
  2014-11-06 12:20 ` [PATCH 1/2] ARM: implement recommended WAR for errata 709718 Holger Schurig
@ 2014-11-07  6:55 ` Sascha Hauer
  2 siblings, 0 replies; 8+ messages in thread
From: Sascha Hauer @ 2014-11-07  6:55 UTC (permalink / raw)
  To: Lucas Stach; +Cc: barebox

On Thu, Nov 06, 2014 at 12:23:12PM +0100, Lucas Stach wrote:
> ARM Cortex A8 errata 709718:
> "Load and store operations to shared device memory
> regions may not complete in program order"
> 
> We implement the recommended workaround in the bootloader
> as it must be applied before enabling the MMU for the
> first time.
> 
> Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

Applied both, thanks

Sascha

> ---
>  arch/arm/include/asm/errata.h | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/arch/arm/include/asm/errata.h b/arch/arm/include/asm/errata.h
> index e2ffd87360c0..9525823e4ca8 100644
> --- a/arch/arm/include/asm/errata.h
> +++ b/arch/arm/include/asm/errata.h
> @@ -12,6 +12,18 @@
>   * GNU General Public License for more details.
>   */
>  
> +static inline void enable_arm_errata_709718_war(void)
> +{
> +	__asm__ __volatile__ (
> +		"mrc	p15, 0, r0, c10, c2, 0\n"
> +		"bic	r0, #3 << 16\n"
> +		"mcr	p15, 0, r0, c10, c2, 0\n"
> +		"mrc	p15, 0, r0, c1, c0, 0\n"
> +		"orr	r0, r0, #1 << 28\n"
> +		"mcr	p15, 0, r0, c1, c0, 0\n"
> +	);
> +}
> +
>  static inline void enable_arm_errata_716044_war(void)
>  {
>  	__asm__ __volatile__ (
> -- 
> 2.1.1
> 
> 
> _______________________________________________
> barebox mailing list
> barebox@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/barebox
> 

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Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
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^ permalink raw reply	[flat|nested] 8+ messages in thread

end of thread, other threads:[~2014-11-11 14:01 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-11-06 11:23 [PATCH 1/2] ARM: implement recommended WAR for errata 709718 Lucas Stach
2014-11-06 11:23 ` [PATCH 2/2] ARM: imx5: add imx5_cpu_lowlevel_init and use in all boards Lucas Stach
2014-11-11 13:51   ` Andreas Pretzsch
2014-11-11 14:01     ` Lucas Stach
2014-11-06 12:20 ` [PATCH 1/2] ARM: implement recommended WAR for errata 709718 Holger Schurig
2014-11-06 12:44   ` Lucas Stach
2014-11-06 12:46   ` Eric Bénard
2014-11-07  6:55 ` Sascha Hauer

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