fix(errata): workaround for Cortex-A710 erratum 2058056
Cortex-A710 erratum 2058056 is a Cat B erratum that applies to
revisions r0p0, r1p0, and r2p0. It is still open. The workaround
is to write the value 4'b1001 to the PF_MODE bits in the
IMP_CPUECTLR2_EL1 register which will place the data prefetcher
in the most conservative mode instead of disabling it.
SDEN can be found here:
https://developer.arm.com/documentation/SDEN1775101/latest
Signed-off-by: nayanpatel-arm <nayankumar.patel@arm.com>
Change-Id: I7ce5181b3b469fbbb16501e633116e119b8bf4f1
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index fd34dcb..d67223c 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -429,6 +429,10 @@
# to revision r2p0 of the Cortex-A710 cpu and is still open.
ERRATA_A710_2083908 ?=0
+# Flag to apply erratum 2058056 workaround during reset. This erratum applies
+# to revisions r0p0, r1p0 and r2p0 of the Cortex-A710 cpu and is still open.
+ERRATA_A710_2058056 ?=0
+
# Flag to apply erratum 2067956 workaround during reset. This erratum applies
# to revision r0p0 of the Neoverse N2 cpu and is still open.
ERRATA_N2_2067956 ?=0
@@ -814,6 +818,10 @@
$(eval $(call assert_boolean,ERRATA_A710_2083908))
$(eval $(call add_define,ERRATA_A710_2083908))
+# Process ERRATA_A710_2058056 flag
+$(eval $(call assert_boolean,ERRATA_A710_2058056))
+$(eval $(call add_define,ERRATA_A710_2058056))
+
# Process ERRATA_N2_2067956 flag
$(eval $(call assert_boolean,ERRATA_N2_2067956))
$(eval $(call add_define,ERRATA_N2_2067956))