diff options
Diffstat (limited to 'lib/cpus/aarch64/neoverse_v1.S')
| -rw-r--r-- | lib/cpus/aarch64/neoverse_v1.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/lib/cpus/aarch64/neoverse_v1.S b/lib/cpus/aarch64/neoverse_v1.S index f20202739..0bcf52a78 100644 --- a/lib/cpus/aarch64/neoverse_v1.S +++ b/lib/cpus/aarch64/neoverse_v1.S @@ -224,6 +224,41 @@ func check_errata_1966096 b cpu_rev_var_range endfunc check_errata_1966096 + /* -------------------------------------------------- + * Errata Workaround for Neoverse V1 Errata #2139242. + * This applies to revisions r0p0, r1p0, and r1p1, it + * is still open. + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x17 + * -------------------------------------------------- + */ +func errata_neoverse_v1_2139242_wa + /* Check workaround compatibility. */ + mov x17, x30 + bl check_errata_2139242 + cbz x0, 1f + + /* Apply the workaround. */ + mov x0, #0x3 + msr S3_6_C15_C8_0, x0 + ldr x0, =0xEE720F14 + msr S3_6_C15_C8_2, x0 + ldr x0, =0xFFFF0FDF + msr S3_6_C15_C8_3, x0 + ldr x0, =0x40000005003FF + msr S3_6_C15_C8_1, x0 + isb + +1: + ret x17 +endfunc errata_neoverse_v1_2139242_wa + +func check_errata_2139242 + /* Applies to r0p0, r1p0, r1p1 */ + mov x1, #0x11 + b cpu_rev_var_ls +endfunc check_errata_2139242 + /* --------------------------------------------- * HW will do the cache maintenance while powering down * --------------------------------------------- @@ -260,6 +295,7 @@ func neoverse_v1_errata_report report_errata ERRATA_V1_1925756, neoverse_v1, 1925756 report_errata ERRATA_V1_1940577, neoverse_v1, 1940577 report_errata ERRATA_V1_1966096, neoverse_v1, 1966096 + report_errata ERRATA_V1_2139242, neoverse_v1, 2139242 ldp x8, x30, [sp], #16 ret @@ -303,6 +339,11 @@ func neoverse_v1_reset_func bl errata_neoverse_v1_1966096_wa #endif +#if ERRATA_V1_2139242 + mov x0, x18 + bl errata_neoverse_v1_2139242_wa +#endif + ret x19 endfunc neoverse_v1_reset_func |