diff options
Diffstat (limited to 'lib/cpus/aarch64/neoverse_n2.S')
| -rw-r--r-- | lib/cpus/aarch64/neoverse_n2.S | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/lib/cpus/aarch64/neoverse_n2.S b/lib/cpus/aarch64/neoverse_n2.S index 869aa41e1..621aded7c 100644 --- a/lib/cpus/aarch64/neoverse_n2.S +++ b/lib/cpus/aarch64/neoverse_n2.S @@ -305,6 +305,34 @@ func check_errata_2242400 b cpu_rev_var_ls endfunc check_errata_2242400 +/* -------------------------------------------------- + * Errata Workaround for Neoverse N2 Erratum 2280757. + * This applies to revision r0p0 of Neoverse N2. it is still open. + * Inputs: + * x0: variant[4:7] and revision[0:3] of current cpu. + * Shall clobber: x0-x1, x17 + * -------------------------------------------------- + */ +func errata_n2_2280757_wa + /* Check revision. */ + mov x17, x30 + bl check_errata_2280757 + cbz x0, 1f + + /* Apply instruction patching sequence */ + mrs x1, NEOVERSE_N2_CPUACTLR_EL1 + orr x1, x1, NEOVERSE_N2_CPUACTLR_EL1_BIT_22 + msr NEOVERSE_N2_CPUACTLR_EL1, x1 +1: + ret x17 +endfunc errata_n2_2280757_wa + +func check_errata_2280757 + /* Applies to r0p0 */ + mov x1, #0x00 + b cpu_rev_var_ls +endfunc check_errata_2280757 + /* ------------------------------------------- * The CPU Ops reset function for Neoverse N2. * ------------------------------------------- @@ -366,6 +394,11 @@ func neoverse_n2_reset_func bl errata_n2_2242400_wa #endif +#if ERRATA_N2_2280757 + mov x0, x18 + bl errata_n2_2280757_wa +#endif + #if ENABLE_AMU /* Make sure accesses from EL0/EL1 and EL2 are not trapped to EL3 */ mrs x0, cptr_el3 @@ -435,6 +468,7 @@ func neoverse_n2_errata_report report_errata ERRATA_N2_2242415, neoverse_n2, 2242415 report_errata ERRATA_N2_2138958, neoverse_n2, 2138958 report_errata ERRATA_N2_2242400, neoverse_n2, 2242400 + report_errata ERRATA_N2_2280757, neoverse_n2, 2280757 ldp x8, x30, [sp], #16 ret |