fix(errata): workaround for Cortex-A510 erratum 2250311
Cortex-A510 erratum 2250311 is a Cat B erratum that applies to revisions
r0p0, r0p1, r0p2, r0p3 and r1p0 and is fixed in r1p1.
This erratum workaround is a bit different because it interacts with a
feature supported in TFA. The typical method of implementing an errata
workaround will not work in this case as the MPMM feature would just be
re-enabled by context management at every core power on after being
disabled by the errata framework. So in addition to disabling MPMM, this
workaround also sets a flag in the MPMM runtime framework indicating
that the feature should not be enabled even if ENABLE_MPMM=1.
SDEN can be found here:
https://developer.arm.com/documentation/SDEN2397239
Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: I7805756e65ec90b6ef8af47e200617c9e07a3a7e
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 107753e..217e1fb 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -548,6 +548,10 @@
# present in r0p0 and r0p1 but there is no workaround for those revisions.
ERRATA_A510_2041909 ?=0
+# Flag to apply erratum 2250311 workaround during reset. This erratum applies
+# to revisions r0p0, r0p1, r0p2, r0p3 and r1p0, and is fixed in r1p1.
+ERRATA_A510_2250311 ?=0
+
# Flag to apply DSU erratum 798953. This erratum applies to DSUs revision r0p0.
# Applying the workaround results in higher DSU power consumption on idle.
ERRATA_DSU_798953 ?=0
@@ -1021,6 +1025,10 @@
$(eval $(call assert_boolean,ERRATA_A510_2041909))
$(eval $(call add_define,ERRATA_A510_2041909))
+# Process ERRATA_A510_2250311 flag
+$(eval $(call assert_boolean,ERRATA_A510_2250311))
+$(eval $(call add_define,ERRATA_A510_2250311))
+
# Process ERRATA_DSU_798953 flag
$(eval $(call assert_boolean,ERRATA_DSU_798953))
$(eval $(call add_define,ERRATA_DSU_798953))