From: Stephen Warren swarren@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@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