[U-Boot] [PATCH 1/2] ARM: implement erratum 716044 workaround

[Stephen Warren]

From: Stephen Warren <swarren at nvidia.com>

Add common code to enable the workaround for ARM erratum 716044. This
will be enabled for Tegra.

Signed-off-by: Stephen Warren <swarren at 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