fix(cpus): workaround for Neoverse N2 erratum 2009478
Neoverse N2 erratum 2009478 is a Cat B erratum that applies to
revision r0p0 and is fixed in r0p1. The workaround is to clear
the ED bit for all core error records before setting the PWRDN_EN
bit in CPUPWRCTLR_EL1 to request a power down.
SDEN documentation:
https://developer.arm.com/documentation/SDEN1982442/latest
Signed-off-by: Bipin Ravi <bipin.ravi@arm.com>
Change-Id: Ic5ef58c9e795b90026af1d2b09edc0eea3ceee51
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 8df0a29..88ef8a7 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -615,6 +615,10 @@
# to revisions r0p0 of the Neoverse-N2 cpu and is fixed in r0p1.
CPU_FLAG_LIST += ERRATA_N2_2002655
+# Flag to apply erratum 2009478 workaround during powerdown. This erratum
+# applies to revision r0p0 of the Neoverse N2 cpu, it is fixed in r0p1.
+CPU_FLAG_LIST += ERRATA_N2_2009478
+
# Flag to apply erratum 2067956 workaround during reset. This erratum applies
# to revision r0p0 of the Neoverse N2 cpu and is fixed in r0p1.
CPU_FLAG_LIST += ERRATA_N2_2067956