* [PATCH] ARM: OMAP5: Redo THUMB mode switch on secondary CPU
@ 2014-04-30 2:53 Joel Fernandes
2014-04-30 9:43 ` Dave Martin
2014-05-06 0:32 ` Tony Lindgren
0 siblings, 2 replies; 3+ messages in thread
From: Joel Fernandes @ 2014-04-30 2:53 UTC (permalink / raw)
To: linux-arm-kernel
Here's a redo of the patch [1] that effectively does the same
thing but is the right way to do things by using ENDPROC instead.
The firmware correctly switches to THUMB before entry.
The patch applies ontop of the earlier patch [1].
[1] https://lkml.org/lkml/2014/4/22/1044
Suggested-by: Dave Martin <Dave.Martin@arm.com>
Cc: Dave Martin <Dave.Martin@arm.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Nishanth Menon <nm@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Signed-off-by: Joel Fernandes <joelf@ti.com>
---
Tony, the earlier patch went into your fixes, and can remain. This patch is just a simple redo of the same and can go in for v3.16, no problem. Thanks.
arch/arm/mach-omap2/omap-headsmp.S | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff --git a/arch/arm/mach-omap2/omap-headsmp.S b/arch/arm/mach-omap2/omap-headsmp.S
index 1809dce..bf36f26 100644
--- a/arch/arm/mach-omap2/omap-headsmp.S
+++ b/arch/arm/mach-omap2/omap-headsmp.S
@@ -31,10 +31,6 @@
* register AuxCoreBoot0.
*/
ENTRY(omap5_secondary_startup)
-.arm
-THUMB( adr r9, BSYM(wait) ) @ CPU may be entered in ARM mode.
-THUMB( bx r9 ) @ If this is a Thumb-2 kernel,
-THUMB( .thumb ) @ switch to Thumb now.
wait: ldr r2, =AUX_CORE_BOOT0_PA @ read from AuxCoreBoot0
ldr r0, [r2]
mov r0, r0, lsr #5
@@ -43,7 +39,7 @@ wait: ldr r2, =AUX_CORE_BOOT0_PA @ read from AuxCoreBoot0
cmp r0, r4
bne wait
b secondary_startup
-END(omap5_secondary_startup)
+ENDPROC(omap5_secondary_startup)
/*
* OMAP4 specific entry point for secondary CPU to jump from ROM
* code. This routine also provides a holding flag into which
--
1.7.9.5
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [PATCH] ARM: OMAP5: Redo THUMB mode switch on secondary CPU
2014-04-30 2:53 [PATCH] ARM: OMAP5: Redo THUMB mode switch on secondary CPU Joel Fernandes
@ 2014-04-30 9:43 ` Dave Martin
2014-05-06 0:32 ` Tony Lindgren
1 sibling, 0 replies; 3+ messages in thread
From: Dave Martin @ 2014-04-30 9:43 UTC (permalink / raw)
To: linux-arm-kernel
On Tue, Apr 29, 2014 at 09:53:47PM -0500, Joel Fernandes wrote:
> Here's a redo of the patch [1] that effectively does the same
> thing but is the right way to do things by using ENDPROC instead.
> The firmware correctly switches to THUMB before entry.
>
> The patch applies ontop of the earlier patch [1].
>
> [1] https://lkml.org/lkml/2014/4/22/1044
>
> Suggested-by: Dave Martin <Dave.Martin@arm.com>
> Cc: Dave Martin <Dave.Martin@arm.com>
> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Cc: Russell King <linux@arm.linux.org.uk>
> Cc: Nishanth Menon <nm@ti.com>
> Cc: Tony Lindgren <tony@atomide.com>
> Signed-off-by: Joel Fernandes <joelf@ti.com>
Looks OK to me.
This also makes omap5 consistent with omap3/4 here.
Reviewed-by: Dave Martin <Dave.Martin@arm.com>
> ---
>
> Tony, the earlier patch went into your fixes, and can remain. This patch is just a simple redo of the same and can go in for v3.16, no problem. Thanks.
>
> arch/arm/mach-omap2/omap-headsmp.S | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/omap-headsmp.S b/arch/arm/mach-omap2/omap-headsmp.S
> index 1809dce..bf36f26 100644
> --- a/arch/arm/mach-omap2/omap-headsmp.S
> +++ b/arch/arm/mach-omap2/omap-headsmp.S
> @@ -31,10 +31,6 @@
> * register AuxCoreBoot0.
> */
> ENTRY(omap5_secondary_startup)
> -.arm
> -THUMB( adr r9, BSYM(wait) ) @ CPU may be entered in ARM mode.
> -THUMB( bx r9 ) @ If this is a Thumb-2 kernel,
> -THUMB( .thumb ) @ switch to Thumb now.
> wait: ldr r2, =AUX_CORE_BOOT0_PA @ read from AuxCoreBoot0
> ldr r0, [r2]
> mov r0, r0, lsr #5
> @@ -43,7 +39,7 @@ wait: ldr r2, =AUX_CORE_BOOT0_PA @ read from AuxCoreBoot0
> cmp r0, r4
> bne wait
> b secondary_startup
> -END(omap5_secondary_startup)
> +ENDPROC(omap5_secondary_startup)
> /*
> * OMAP4 specific entry point for secondary CPU to jump from ROM
> * code. This routine also provides a holding flag into which
> --
> 1.7.9.5
>
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH] ARM: OMAP5: Redo THUMB mode switch on secondary CPU
2014-04-30 2:53 [PATCH] ARM: OMAP5: Redo THUMB mode switch on secondary CPU Joel Fernandes
2014-04-30 9:43 ` Dave Martin
@ 2014-05-06 0:32 ` Tony Lindgren
1 sibling, 0 replies; 3+ messages in thread
From: Tony Lindgren @ 2014-05-06 0:32 UTC (permalink / raw)
To: linux-arm-kernel
* Joel Fernandes <joelf@ti.com> [140429 19:54]:
> Here's a redo of the patch [1] that effectively does the same
> thing but is the right way to do things by using ENDPROC instead.
> The firmware correctly switches to THUMB before entry.
>
> The patch applies ontop of the earlier patch [1].
>
> [1] https://lkml.org/lkml/2014/4/22/1044
>
> Suggested-by: Dave Martin <Dave.Martin@arm.com>
> Cc: Dave Martin <Dave.Martin@arm.com>
> Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
> Cc: Russell King <linux@arm.linux.org.uk>
> Cc: Nishanth Menon <nm@ti.com>
> Cc: Tony Lindgren <tony@atomide.com>
> Signed-off-by: Joel Fernandes <joelf@ti.com>
> ---
>
> Tony, the earlier patch went into your fixes, and can remain. This patch is just a simple redo of the same and can go in for v3.16, no problem. Thanks.
OK thanks, applying into omap-for-v3.16/fixes-not-urgent.
Tony
> arch/arm/mach-omap2/omap-headsmp.S | 6 +-----
> 1 file changed, 1 insertion(+), 5 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/omap-headsmp.S b/arch/arm/mach-omap2/omap-headsmp.S
> index 1809dce..bf36f26 100644
> --- a/arch/arm/mach-omap2/omap-headsmp.S
> +++ b/arch/arm/mach-omap2/omap-headsmp.S
> @@ -31,10 +31,6 @@
> * register AuxCoreBoot0.
> */
> ENTRY(omap5_secondary_startup)
> -.arm
> -THUMB( adr r9, BSYM(wait) ) @ CPU may be entered in ARM mode.
> -THUMB( bx r9 ) @ If this is a Thumb-2 kernel,
> -THUMB( .thumb ) @ switch to Thumb now.
> wait: ldr r2, =AUX_CORE_BOOT0_PA @ read from AuxCoreBoot0
> ldr r0, [r2]
> mov r0, r0, lsr #5
> @@ -43,7 +39,7 @@ wait: ldr r2, =AUX_CORE_BOOT0_PA @ read from AuxCoreBoot0
> cmp r0, r4
> bne wait
> b secondary_startup
> -END(omap5_secondary_startup)
> +ENDPROC(omap5_secondary_startup)
> /*
> * OMAP4 specific entry point for secondary CPU to jump from ROM
> * code. This routine also provides a holding flag into which
> --
> 1.7.9.5
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2014-04-30 9:43 ` Dave Martin
2014-05-06 0:32 ` Tony Lindgren
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