fix(cpus): workaround for Neoverse V1 erratum 2348377
Neoverse V1 erratum 2348377 is a Cat B erratum that applies to
all revisions <= r1p1 and is fixed in r1p2. The workaround is to
set CPUACTLR5_EL1[61] to 1.
SDEN documentation:
https://developer.arm.com/documentation/SDEN-1401781/latest
Change-Id: Ica402494f78811c85e56a262e1f60b09915168fe
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
diff --git a/lib/cpus/aarch64/neoverse_v1.S b/lib/cpus/aarch64/neoverse_v1.S
index 2a49134..c2fbb11 100644
--- a/lib/cpus/aarch64/neoverse_v1.S
+++ b/lib/cpus/aarch64/neoverse_v1.S
@@ -196,6 +196,13 @@
check_erratum_ls neoverse_v1, ERRATUM(2294912), CPU_REV(1, 2)
+workaround_runtime_start neoverse_v1, ERRATUM(2348377), ERRATA_V1_2348377
+ /* Set bit 61 in CPUACTLR5_EL1 */
+ sysreg_bit_set NEOVERSE_V1_ACTLR5_EL1, NEOVERSE_V1_ACTLR5_EL1_BIT_61
+workaround_runtime_end neoverse_v1, ERRATUM(2348377)
+
+check_erratum_ls neoverse_v1, ERRATUM(2348377), CPU_REV(1, 1)
+
workaround_reset_start neoverse_v1, ERRATUM(2372203), ERRATA_V1_2372203
/* Set bit 40 in ACTLR2_EL1 */
sysreg_bit_set NEOVERSE_V1_ACTLR2_EL1, NEOVERSE_V1_ACTLR2_EL1_BIT_40
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 283314b..3b6b872 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -520,6 +520,10 @@
# to revisions r0p0, r1p0, and r1p1 and r1p2 of the Neoverse V1 cpu and is still open.
CPU_FLAG_LIST += ERRATA_V1_2294912
+# Flag to apply erratum 2348377 workaround during reset. This erratum applies
+# to revisions r0p0, r1p0 and r1p1 of the Neoverse V1 cpu and is fixed in r1p2.
+CPU_FLAG_LIST += ERRATA_V1_2348377
+
# Flag to apply erratum 2372203 workaround during reset. This erratum applies
# to revisions r0p0, r1p0 and r1p1 of the Neoverse V1 cpu and is still open.
CPU_FLAG_LIST += ERRATA_V1_2372203