lib/cpu: Workaround for Cortex A77 erratum 1946167
Cortex A77 erratum 1946167 is a Cat B erratum that applies to revisions
<= r1p1. This erratum is avoided by inserting a DMB ST before acquire
atomic instructions without release semantics through a series of
writes to implementation defined system registers.
SDEN can be found here:
https://documentation-service.arm.com/static/600057a29b9c2d1bb22cd1be?token=
Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: I53e3b4fb7e7575ec83d75c2f132eda5ae0b4f01f
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 64a4b4d..fb33346 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -290,6 +290,10 @@
# only to revision <= r1p1 of the Cortex A77 cpu.
ERRATA_A77_1925769 ?=0
+# Flag to apply erratum 1946167 workaround during reset. This erratum applies
+# only to revision <= r1p1 of the Cortex A77 cpu.
+ERRATA_A77_1946167 ?=0
+
# Flag to apply erratum 1688305 workaround during reset. This erratum applies
# to revisions r0p0 - r1p0 of the A78 cpu.
ERRATA_A78_1688305 ?=0
@@ -585,6 +589,10 @@
$(eval $(call assert_boolean,ERRATA_A77_1925769))
$(eval $(call add_define,ERRATA_A77_1925769))
+# Process ERRATA_A77_1946167 flag
+$(eval $(call assert_boolean,ERRATA_A77_1946167))
+$(eval $(call add_define,ERRATA_A77_1946167))
+
# Process ERRATA_A78_1688305 flag
$(eval $(call assert_boolean,ERRATA_A78_1688305))
$(eval $(call add_define,ERRATA_A78_1688305))