fix(cpus): workaround for Cortex-X3 erratum 2615812
Cortex-X3 erratum 2615812 is a Cat B erratum that applies to revisions
r0p0, r1p0, and r1p1, and is still open. The workaround is to disable
the use of the Full Retention power mode in the core (setting
WFI_RET_CTRL and WFE_RET_CTRL in CORTEX_X3_IMP_CPUPWRCTLR_EL1 to 0b000).
SDEN can be found here:
https://developer.arm.com/documentation/SDEN2055130/latest
Change-Id: I5ad66df3e18fc85a6b23f6662239494ee001d82f
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index f19c16e..8ef794b 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -659,6 +659,10 @@
# to revisions r0p0 and r1p0 of the Cortex-X3 cpu, it is fixed in r1p1.
ERRATA_X3_2313909 ?=0
+# Flag to apply erratum 2615812 workaround on powerdown. This erratum applies
+# to revisions r0p0, r1p0, r1p1 of the Cortex-X3 cpu, it is still open.
+ERRATA_X3_2615812 ?=0
+
# Flag to apply erratum 1922240 workaround during reset. This erratum applies
# to revision r0p0 of the Cortex-A510 cpu and is fixed in r0p1.
ERRATA_A510_1922240 ?=0
@@ -1288,6 +1292,10 @@
$(eval $(call assert_boolean,ERRATA_X3_2313909))
$(eval $(call add_define,ERRATA_X3_2313909))
+# Process ERRATA_X3_2615812 flag
+$(eval $(call assert_boolean,ERRATA_X3_2615812))
+$(eval $(call add_define,ERRATA_X3_2615812))
+
# Process ERRATA_A510_1922240 flag
$(eval $(call assert_boolean,ERRATA_A510_1922240))
$(eval $(call add_define,ERRATA_A510_1922240))