* 829520: Code bounded by indirect conditional branch might corrupt instruction stream, Workaround: Set CPUACTLR_EL1[4] = 1'b1 to disable the Indirect Predictor

* 833471: VMSR FPSCR functional failure or deadlock Workaround: Set CPUACTLR[38] to 1, which forces FPSCR write flush

Signed-off-by: Ashish Kumar Ashish.Kumar@nxp.com --- v2: Incorporated review comments

arch/arm/cpu/armv8/start.S | 19 +++++++++++++++++++ arch/arm/include/asm/arch-fsl-layerscape/config.h | 4 ++++ 2 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S index 2ee60d6..67b166c 100644 --- a/arch/arm/cpu/armv8/start.S +++ b/arch/arm/cpu/armv8/start.S @@ -168,6 +168,25 @@ apply_a57_core_errata: msr S3_1_c15_c2_0, x0 /* cpuactlr_el1 */ #endif

+#ifdef CONFIG_ARM_ERRATA_833471 + mrs x0, S3_1_c15_c2_0 /* cpuactlr_el1 */ + /* FPSCR write flush. + * Note that in some cases where a flush is unnecessary this + could impact performance. */ + orr x0, x0, #1 << 38 + msr S3_1_c15_c2_0, x0 /* cpuactlr_el1 */ +#endif + +#ifdef CONFIG_ARM_ERRATA_829520 + mrs x0, S3_1_c15_c2_0 /* cpuactlr_el1 */ + /* Disable Indirect Predictor bit will prevent this erratum + from occurring + * Note that in some cases where a flush is unnecessary this + could impact performance. */ + orr x0, x0, #1 << 4 + msr S3_1_c15_c2_0, x0 /* cpuactlr_el1 */ +#endif + #ifdef CONFIG_ARM_ERRATA_833069 mrs x0, S3_1_c15_c2_0 /* cpuactlr_el1 */ /* Disable Enable Invalidates of BTB bit */ diff --git a/arch/arm/include/asm/arch-fsl-layerscape/config.h b/arch/arm/include/asm/arch-fsl-layerscape/config.h index 49b113d..9267082 100644 --- a/arch/arm/include/asm/arch-fsl-layerscape/config.h +++ b/arch/arm/include/asm/arch-fsl-layerscape/config.h @@ -118,6 +118,10 @@ #define CONFIG_SYS_FSL_ERRATUM_A008585 #define CONFIG_SYS_FSL_ERRATUM_A008751 #define CONFIG_SYS_FSL_ERRATUM_A009635 +/* ARM A57 CORE ERRATA */ +#define CONFIG_ARM_ERRATA_833471 +#define CONFIG_ARM_ERRATA_829520 + #elif defined(CONFIG_LS1043A) #define CONFIG_MAX_CPUS 4 #define CONFIG_SYS_CACHELINE_SIZE 64