fix(cpus): workaround for Neoverse N1 erratum 2743102
Neoverse N1 erratum 2743102 is a Cat B erratum that applies to
all revisions <=r4p1 and is still open. The workaround is to
insert a dsb before the isb in the power down sequence.
SDEN documentation:
https://developer.arm.com/documentation/SDEN885747/latest
Signed-off-by: Bipin Ravi <bipin.ravi@arm.com>
Change-Id: I81a8793c1a118764df3ac97b67f5e088f56f6a20
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index b4421dd..f53bad1 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -450,6 +450,10 @@
# exists in revisions r0p0, r1p0, and r2p0 as well but there is no workaround.
ERRATA_N1_1946160 ?=0
+# Flag to apply erratum 2743102 workaround during powerdown. This erratum
+# applies to all revisions <= r4p1 of the Neoverse N1 cpu and is still open.
+ERRATA_N1_2743102 ?=0
+
# Flag to apply erratum 2002655 workaround during reset. This erratum applies
# to revisions r0p0 of the Neoverse-N2 cpu, it is still open.
ERRATA_N2_2002655 ?=0
@@ -1072,6 +1076,10 @@
$(eval $(call assert_boolean,ERRATA_N1_1946160))
$(eval $(call add_define,ERRATA_N1_1946160))
+# Process ERRATA_N1_2743102 flag
+$(eval $(call assert_boolean,ERRATA_N1_2743102))
+$(eval $(call add_define,ERRATA_N1_2743102))
+#
# Process ERRATA_N2_2002655 flag
$(eval $(call assert_boolean,ERRATA_N2_2002655))
$(eval $(call add_define,ERRATA_N2_2002655))