Workaround for Neoverse N1 erratum 1275112
Neoverse N1 erratum 1275112 is a Cat B erratum [1],
present in older revisions of the Neoverse N1 processor core.
The workaround is to set a bit in the implementation defined
CPUACTLR_EL1 system register, which delays instruction fetch after
branch misprediction.
[1] http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.pjdoc-466751330-10325/index.html
Change-Id: If7fe55fe92e656fa6aea12327ab297f2e6119833
Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 2f13696..2604023 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -270,6 +270,10 @@
# only to revision <= r3p0 of the Neoverse N1 cpu.
ERRATA_N1_1262888 ?=0
+# Flag to apply erratum 1275112 workaround during reset. This erratum applies
+# only to revision <= r3p0 of the Neoverse N1 cpu.
+ERRATA_N1_1275112 ?=0
+
# Flag to apply erratum 1315703 workaround during reset. This erratum applies
# to revisions before r3p1 of the Neoverse N1 cpu.
ERRATA_N1_1315703 ?=1
@@ -495,6 +499,10 @@
$(eval $(call assert_boolean,ERRATA_N1_1262888))
$(eval $(call add_define,ERRATA_N1_1262888))
+# Process ERRATA_N1_1275112 flag
+$(eval $(call assert_boolean,ERRATA_N1_1275112))
+$(eval $(call add_define,ERRATA_N1_1275112))
+
# Process ERRATA_N1_1315703 flag
$(eval $(call assert_boolean,ERRATA_N1_1315703))
$(eval $(call add_define,ERRATA_N1_1315703))