Only cortex-a9 based samsung platforms have l2x0 cache controller. Hence check
the same before restoring the cache in resume.
This is needed for single kernel image.
Signed-off-by: Inderpal Singh <inderpal.singh@xxxxxxxxxx>
---
changes in v2:
- check processor midr instead of checking all soc ids as
suggested by Kukjin
changes in v3:
- simplify by reading midr in assembly as per Russell
arch/arm/plat-samsung/s5p-sleep.S | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/arm/plat-samsung/s5p-sleep.S b/arch/arm/plat-samsung/s5p-sleep.S
index bdf6dad..6e15993 100644
--- a/arch/arm/plat-samsung/s5p-sleep.S
+++ b/arch/arm/plat-samsung/s5p-sleep.S
@@ -25,6 +25,9 @@
#include <asm/asm-offsets.h>
#include <asm/hardware/cache-l2x0.h>
+#define CPU_MASK 0xff0ffff0
+#define CPU_CORTEX_A9 0x410fc090
+
/*
* The following code is located into the .data section. This is to
* allow l2x0_regs_phys to be accessed with a relative load while we
@@ -51,6 +54,12 @@
ENTRY(s3c_cpu_resume)
#ifdef CONFIG_CACHE_L2X0
+ mrc p15, 0, r0, c0, c0, 0
+ ldr r1, =CPU_MASK
+ and r0, r0, r1
+ ldr r1, =CPU_CORTEX_A9
+ cmp r0, r1
+ bne resume_l2on
adr r0, l2x0_regs_phys
ldr r0, [r0]
ldr r1, [r0, #L2X0_R_PHY_BASE]
--
1.7.9.5
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