diff options
| author | Sandrine Bailleux <sandrine.bailleux@arm.com> | 2016-04-14 14:18:07 +0100 |
|---|---|---|
| committer | Sandrine Bailleux <sandrine.bailleux@arm.com> | 2016-04-21 12:59:59 +0100 |
| commit | 0b77197baf9a22625f91112cf009c9209f4279e8 (patch) | |
| tree | 5cfd8b9ca56e339523439f2a07497637d77c480e /lib | |
| parent | a8b1c769361c63a69fd73afe37bb4799446ec045 (diff) | |
Add support for Cortex-A57 erratum 829520 workaround
Change-Id: Ia2ce8aa752efb090cfc734c1895c8f2539e82439
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/cpus/aarch64/cortex_a57.S | 32 | ||||
| -rw-r--r-- | lib/cpus/cpu-ops.mk | 8 |
2 files changed, 40 insertions, 0 deletions
diff --git a/lib/cpus/aarch64/cortex_a57.S b/lib/cpus/aarch64/cortex_a57.S index ec32ce78..25def1cd 100644 --- a/lib/cpus/aarch64/cortex_a57.S +++ b/lib/cpus/aarch64/cortex_a57.S @@ -225,6 +225,32 @@ apply_828024: ret endfunc errata_a57_828024_wa + /* --------------------------------------------------- + * Errata Workaround for Cortex A57 Errata #829520. + * This applies only to revision <= r1p2 of Cortex A57. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Clobbers : x0 - x5 + * --------------------------------------------------- + */ +func errata_a57_829520_wa + /* + * Compare x0 against revision r1p2 + */ + cmp x0, #0x12 + b.ls apply_829520 +#if LOG_LEVEL >= LOG_LEVEL_VERBOSE + b print_revision_warning +#else + ret +#endif +apply_829520: + mrs x1, CPUACTLR_EL1 + orr x1, x1, #CPUACTLR_DIS_INDIRECT_PREDICTOR + msr CPUACTLR_EL1, x1 + ret +endfunc errata_a57_829520_wa + /* ------------------------------------------------- * The CPU Ops reset function for Cortex-A57. * Clobbers: x0-x5, x15, x19, x30 @@ -267,6 +293,12 @@ func cortex_a57_reset_func mov x0, x15 bl errata_a57_828024_wa #endif + +#if ERRATA_A57_829520 + mov x0, x15 + bl errata_a57_829520_wa +#endif + /* --------------------------------------------- * Enable the SMP bit. * --------------------------------------------- diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk index 7d9f2b72..62de70f5 100644 --- a/lib/cpus/cpu-ops.mk +++ b/lib/cpus/cpu-ops.mk @@ -82,6 +82,10 @@ ERRATA_A57_826974 ?=0 # only to revision <= r1p1 of the Cortex A57 cpu. ERRATA_A57_828024 ?=0 +# Flag to apply erratum 829520 workaround during reset. This erratum applies +# only to revision <= r1p2 of the Cortex A57 cpu. +ERRATA_A57_829520 ?=0 + # Process ERRATA_A53_826319 flag $(eval $(call assert_boolean,ERRATA_A53_826319)) $(eval $(call add_define,ERRATA_A53_826319)) @@ -105,3 +109,7 @@ $(eval $(call add_define,ERRATA_A57_826974)) # Process ERRATA_A57_828024 flag $(eval $(call assert_boolean,ERRATA_A57_828024)) $(eval $(call add_define,ERRATA_A57_828024)) + +# Process ERRATA_A57_829520 flag +$(eval $(call assert_boolean,ERRATA_A57_829520)) +$(eval $(call add_define,ERRATA_A57_829520)) |