From: Stephen Warren <swar...@nvidia.com>
Add common code to enable the workaround for ARM erratum 716044. This
will be enabled for Tegra.
Signed-off-by: Stephen Warren <swar...@nvidia.com>
---
This depends on my previous ARM errata series. I found out we needed
another one after I wrote the first series.
README | 1 +
arch/arm/cpu/armv7/start.S | 6 ++++++
2 files changed, 7 insertions(+)
diff --git a/README b/README
index f2b1c88..97ef9f0 100644
--- a/README
+++ b/README
@@ -485,6 +485,7 @@ The following options need to be configured:
Thumb2 this flag will result in Thumb2 code generated by
GCC.
+ CONFIG_ARM_ERRATA_716044
CONFIG_ARM_ERRATA_742230
CONFIG_ARM_ERRATA_743622
CONFIG_ARM_ERRATA_751472
diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S
index 30f02d3..6834ffe 100644
--- a/arch/arm/cpu/armv7/start.S
+++ b/arch/arm/cpu/armv7/start.S
@@ -310,6 +310,12 @@ ENTRY(cpu_init_cp15)
#endif
mcr p15, 0, r0, c1, c0, 0
+#ifdef CONFIG_ARM_ERRATA_716044
+ mrc p15, 0, r0, c1, c0, 0 @ read system control register
+ orr r0, r0, #1 << 11 @ set bit #11
+ mcr p15, 0, r0, c1, c0, 0 @ write system control register
+#endif
+
#ifdef CONFIG_ARM_ERRATA_742230
mrc p15, 0, r0, c15, c0, 1 @ read diagnostic register
orr r0, r0, #1 << 4 @ set bit #4
--
1.7.10.4
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