fix(errata): workaround for Neoverse-N2 erratum 2376738
Neoverse-N2 erratum 2376738 is a Cat B erratum that applies
to revision r0p0 of the CPU. It is fixed in r0p1. The workaround
is to set CPUACTLR2_EL1[0] to 1 to force PLDW/PFRM ST to
behave like PLD/PRFM LD and not cause invalidations to other
PE caches.
SDEN can be found here:
https://developer.arm.com/documentation/SDEN1982442/latest
Signed-off-by: Akram Ahmad <Akram.Ahmad@arm.com>
Change-Id: I4ad4434f9b7210244e67046d9657d218857dced5
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 2ed1c6d..3e5e92a 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -572,6 +572,10 @@
# to revision r0p0 of the Neoverse N2 cpu and is still open.
ERRATA_N2_2280757 ?=0
+# Flag to apply erratum 2376738 workaround during reset. This erratum applies
+# to revision r0p0 of the Neoverse N2 cpu, it is fixed in r0p1.
+ERRATA_N2_2376738 ?=0
+
# Flag to apply erratum 2388450 workaround during reset. This erratum applies
# to revision r0p0 of the Neoverse N2 cpu, it is fixed in r0p1.
ERRATA_N2_2388450 ?=0
@@ -1143,6 +1147,10 @@
$(eval $(call assert_boolean,ERRATA_N2_2280757))
$(eval $(call add_define,ERRATA_N2_2280757))
+# Process ERRATA_N2_2376738 flag
+$(eval $(call assert_boolean,ERRATA_N2_2376738))
+$(eval $(call add_define,ERRATA_N2_2376738))
+
# Process ERRATA_N2_2388450 flag
$(eval $(call assert_boolean,ERRATA_N2_2388450))
$(eval $(call add_define,ERRATA_N2_2388450))