diff options
| -rw-r--r-- | lib/cpus/aarch64/cortex_a53.S | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/lib/cpus/aarch64/cortex_a53.S b/lib/cpus/aarch64/cortex_a53.S index bec5b9e03..3a23e025f 100644 --- a/lib/cpus/aarch64/cortex_a53.S +++ b/lib/cpus/aarch64/cortex_a53.S @@ -145,8 +145,23 @@ endfunc check_errata_855873 * This workaround is statically enabled at build time. */ func check_errata_835769 - mov x1, #0x04 - b cpu_rev_var_ls + cmp x0, #0x04 + b.hi errata_not_applies + /* + * Fix potentially available for revisions r0p2, r0p3 and r0p4. + * If r0p2, r0p3 or r0p4; check for fix in REVIDR, else exit. + */ + cmp x0, #0x01 + mov x0, #ERRATA_APPLIES + b.ls exit_check_errata_835769 + /* Load REVIDR. */ + mrs x1, revidr_el1 + /* If REVIDR[7] is set (fix exists) set ERRATA_NOT_APPLIES, else exit. */ + tbz x1, #7, exit_check_errata_835769 +errata_not_applies: + mov x0, #ERRATA_NOT_APPLIES +exit_check_errata_835769: + ret endfunc check_errata_835769 /* |