Re: [PATCH v2 3/3] pm: at91: add disable/enable the L1/L2 cache while suspend/resume
From: Sergei Shtylyov
Date: Wed Jan 28 2015 - 21:28:21 EST
Hello.
On 1/28/2015 5:24 AM, Wenyou Yang wrote:
For the sama5, disable L1 D-cache and L2 cache before the cpu go to wfi,
after wakeing up, enable L1 D-cache and L2 cache.
Waking.
Signed-off-by: Wenyou Yang <wenyou.yang@xxxxxxxxx>
---
arch/arm/mach-at91/pm.c | 12 +++++
arch/arm/mach-at91/pm_suspend.S | 107 +++++++++++++++++++++++++++++++++++++++
2 files changed, 119 insertions(+)
[...]
diff --git a/arch/arm/mach-at91/pm_suspend.S b/arch/arm/mach-at91/pm_suspend.S
index 311cc23..02d4e56 100644
--- a/arch/arm/mach-at91/pm_suspend.S
+++ b/arch/arm/mach-at91/pm_suspend.S
[...]
@@ -324,3 +325,109 @@ ram_restored:
[...]
+l2x_sync:
I don't see where this label is used.
+ ldr r0, [r2, #L2X0_CACHE_SYNC]
+ bic r0, r0, #0x1
+ str r0, [r2, #L2X0_CACHE_SYNC]
+sync:
+ ldr r0, [r2, #L2X0_CACHE_SYNC]
+ ands r0, r0, #0x1
+ bne sync
+
+skip_l2disable:
+ ldmfd sp!, {r4 - r12, pc}
+ENDPROC(at91_disable_l1_l2_cache)
[...]
WBR, Sergei
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