From: Mingkai Hu <mingkai...@nxp.com>
According to design specification, the L2 cache operates at the same
frequency as the A72 CPUs in the cluster with a 3-cycle latency, so
increase the L2 Data RAM and Tag RAM latency to 3 cycles, or else,
will run into different call trace issues.
Signed-off-by: Mingkai Hu <mingkai...@nxp.com>
Signed-off-by: Gong Qianyu <qianyu.g...@nxp.com>
---
v3-v4:
- No change.
v2:
- Revise commit message.
arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S
b/arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S
index 5af6b73..6451a36 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S
+++ b/arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S
@@ -179,6 +179,21 @@ ENTRY(lowlevel_init)
isb
dsb sy
#endif
+
+#ifdef CONFIG_LS1046A
+ /* Initialize the L2 RAM latency */
+ mrs x1, S3_1_c11_c0_2
+ mov x0, #0x1C7
+ /* Clear L2 Tag RAM latency and L2 Data RAM latency */
+ bic x1, x1, x0
+ /* Set L2 data ram latency bits [2:0] */
+ orr x1, x1, #0x2
+ /* set L2 tag ram latency bits [8:6] */
+ orr x1, x1, #0x80
+ msr S3_1_c11_c0_2, x1
+ isb
+#endif
+
mov lr, x29 /* Restore LR */
ret
ENDPROC(lowlevel_init)
--
2.1.0.27.g96db324
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