fix(errata): workaround for Cortex A78 AE erratum 2395408
Cortex A78 AE erratum 2395408 is a Cat B erratum that applies
to revisions <= r0p1. It is still open.
This erratum states, "A translation table walk that matches an
existing L1 prefetch with a read request outstanding on CHI might
fold into the prefetch, which might lead to data corruption for
a future instruction fetch"
This erratum is avoided by setting CPUACTLR2_EL1[40] to 1 to
disable folding of demand requests into older prefetches with
L2 miss requests outstanding.
SDEN is available at https://developer.arm.com/documentation/SDEN-1707912
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
Change-Id: Ic17968987ca3c67fa7f64211bcde6dfcb35ed5d6
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 748724b..8840f8e 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -345,6 +345,10 @@
# to revisions r0p0 and r0p1 of the A78 AE cpu. It is still open.
ERRATA_A78_AE_2376748 ?=0
+# Flag to apply erratum 2395408 workaround during reset. This erratum applies
+# to revisions r0p0 and r0p1 of the A78 AE cpu. It is still open.
+ERRATA_A78_AE_2395408 ?=0
+
# Flag to apply T32 CLREX workaround during reset. This erratum applies
# only to r0p0 and r1p0 of the Neoverse N1 cpu.
ERRATA_N1_1043202 ?=0
@@ -846,6 +850,10 @@
$(eval $(call assert_boolean,ERRATA_A78_AE_2376748))
$(eval $(call add_define,ERRATA_A78_AE_2376748))
+# Process ERRATA_A78_AE_2395408 flag
+$(eval $(call assert_boolean,ERRATA_A78_AE_2395408))
+$(eval $(call add_define,ERRATA_A78_AE_2395408))
+
# Process ERRATA_N1_1043202 flag
$(eval $(call assert_boolean,ERRATA_N1_1043202))
$(eval $(call add_define,ERRATA_N1_1043202))