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* [PATCH v2 5/5] ARM: mach-omap2: apply the errata at run time rather
@ 2013-01-29 10:17 srinidhi kasagar
  2013-01-29 13:04 ` Sergei Shtylyov
  0 siblings, 1 reply; 2+ messages in thread
From: srinidhi kasagar @ 2013-01-29 10:17 UTC (permalink / raw)
  To: linux-arm-kernel

Get the pl310 rtl revision number which is stashed by the l2x0
driver and apply the required errata ERRATA_727915 accordingly.

Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com>
---
 arch/arm/mach-omap2/sleep44xx.S |   25 +++++++++++++++++++++----
 1 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/arch/arm/mach-omap2/sleep44xx.S b/arch/arm/mach-omap2/sleep44xx.S
index 88ff83a..7440f65 100644
--- a/arch/arm/mach-omap2/sleep44xx.S
+++ b/arch/arm/mach-omap2/sleep44xx.S
@@ -157,11 +157,19 @@ skip_scu_gp_set:
 	ldrne	r0, [r8, #L2X0_SAVE_OFFSET1]	@ memory.
 	cmp	r0, #3
 	bne	do_WFI
-#ifdef CONFIG_PL310_ERRATA_727915
+	/* Check for PL310_ERRATA_727915 */
+	ldr	r0, =l2x0_revision
+	cmp	r0, #0x4
+	beq	dosmc
+	cmp	r0, #0x5
+	beq	dosmc
+	b	nosmc
+dosmc:
 	mov	r0, #0x03
 	mov	r12, #OMAP4_MON_L2X0_DBG_CTRL_INDEX
 	DO_SMC
-#endif
+
+nosmc:
 	bl	omap4_get_l2cache_base
 	mov	r2, r0
 	ldr	r0, =0xffff
@@ -171,11 +179,20 @@ wait:
 	ldr	r1, =0xffff
 	ands	r0, r0, r1
 	bne	wait
-#ifdef CONFIG_PL310_ERRATA_727915
+
+	/* Check for PL310_ERRATA_727915 */
+	ldr	r0, =l2x0_revision
+	cmp	r0, #0x4
+	beq	dosmc2
+	cmp	r0, #0x5
+	beq	dosmc2
+	b	nosmc2
+dosmc2:
 	mov	r0, #0x00
 	mov	r12, #OMAP4_MON_L2X0_DBG_CTRL_INDEX
 	DO_SMC
-#endif
+
+nosmc2:
 l2x_sync:
 	bl	omap4_get_l2cache_base
 	mov	r2, r0
-- 
1.7.2.dirty

^ permalink raw reply related	[flat|nested] 2+ messages in thread

* [PATCH v2 5/5] ARM: mach-omap2: apply the errata at run time rather
  2013-01-29 10:17 [PATCH v2 5/5] ARM: mach-omap2: apply the errata at run time rather srinidhi kasagar
@ 2013-01-29 13:04 ` Sergei Shtylyov
  0 siblings, 0 replies; 2+ messages in thread
From: Sergei Shtylyov @ 2013-01-29 13:04 UTC (permalink / raw)
  To: linux-arm-kernel

Hello.

On 29-01-2013 14:17, srinidhi kasagar wrote:

> Get the pl310 rtl revision number which is stashed by the l2x0
> driver and apply the required errata ERRATA_727915 accordingly.

> Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com>
> ---
>   arch/arm/mach-omap2/sleep44xx.S |   25 +++++++++++++++++++++----
>   1 files changed, 21 insertions(+), 4 deletions(-)

> diff --git a/arch/arm/mach-omap2/sleep44xx.S b/arch/arm/mach-omap2/sleep44xx.S
> index 88ff83a..7440f65 100644
> --- a/arch/arm/mach-omap2/sleep44xx.S
> +++ b/arch/arm/mach-omap2/sleep44xx.S
> @@ -157,11 +157,19 @@ skip_scu_gp_set:
>   	ldrne	r0, [r8, #L2X0_SAVE_OFFSET1]	@ memory.
>   	cmp	r0, #3
>   	bne	do_WFI
> -#ifdef CONFIG_PL310_ERRATA_727915
> +	/* Check for PL310_ERRATA_727915 */
> +	ldr	r0, =l2x0_revision
> +	cmp	r0, #0x4
> +	beq	dosmc
> +	cmp	r0, #0x5
> +	beq	dosmc
> +	b	nosmc

    Why not just:
	bne	nosmc

> +dosmc:
>   	mov	r0, #0x03
>   	mov	r12, #OMAP4_MON_L2X0_DBG_CTRL_INDEX
>   	DO_SMC
> -#endif
> +
> +nosmc:
>   	bl	omap4_get_l2cache_base
>   	mov	r2, r0
>   	ldr	r0, =0xffff
> @@ -171,11 +179,20 @@ wait:
>   	ldr	r1, =0xffff
>   	ands	r0, r0, r1
>   	bne	wait
> -#ifdef CONFIG_PL310_ERRATA_727915
> +
> +	/* Check for PL310_ERRATA_727915 */
> +	ldr	r0, =l2x0_revision
> +	cmp	r0, #0x4
> +	beq	dosmc2
> +	cmp	r0, #0x5
> +	beq	dosmc2
> +	b	nosmc2

    Same question.

> +dosmc2:
>   	mov	r0, #0x00
>   	mov	r12, #OMAP4_MON_L2X0_DBG_CTRL_INDEX
>   	DO_SMC
> -#endif
> +
> +nosmc2:
>   l2x_sync:
>   	bl	omap4_get_l2cache_base
>   	mov	r2, r0

WBR, Sergei

^ permalink raw reply	[flat|nested] 2+ messages in thread

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