errata: workaround for Neoverse V1 errata 1852267
Neoverse V1 erratum 1852267 is a Cat B erratum present in r0p0 and
r1p0 of the V1 processor core. It is fixed in r1p1.
SDEN can be found here:
https://documentation-service.arm.com/static/60d499080320e92fa40b4625
Signed-off-by: Lauren Wehrmeister <lauren.wehrmeister@arm.com>
Change-Id: Ide5e0bc09371fbc91c2385ffdff74e604beb2dbe
diff --git a/lib/cpus/aarch64/neoverse_v1.S b/lib/cpus/aarch64/neoverse_v1.S
index 62b92b2..38e9d3f 100644
--- a/lib/cpus/aarch64/neoverse_v1.S
+++ b/lib/cpus/aarch64/neoverse_v1.S
@@ -78,6 +78,34 @@
endfunc check_errata_1791573
/* --------------------------------------------------
+ * Errata Workaround for Neoverse V1 Errata #1852267.
+ * This applies to revisions r0p0 and r1p0, fixed in r1p1.
+ * x0: variant[4:7] and revision[0:3] of current cpu.
+ * Shall clobber: x0-x17
+ * --------------------------------------------------
+ */
+func errata_neoverse_v1_1852267_wa
+ /* Check workaround compatibility. */
+ mov x17, x30
+ bl check_errata_1852267
+ cbz x0, 1f
+
+ /* Set bit 28 in ACTLR2_EL1 */
+ mrs x1, NEOVERSE_V1_ACTLR2_EL1
+ orr x1, x1, #NEOVERSE_V1_ACTLR2_EL1_BIT_28
+ msr NEOVERSE_V1_ACTLR2_EL1, x1
+ isb
+1:
+ ret x17
+endfunc errata_neoverse_v1_1852267_wa
+
+func check_errata_1852267
+ /* Applies to r0p0 and r1p0. */
+ mov x1, #0x10
+ b cpu_rev_var_ls
+endfunc check_errata_1852267
+
+ /* --------------------------------------------------
* Errata Workaround for Neoverse V1 Erratum #1940577
* This applies to revisions r1p0 - r1p1 and is open.
* It also exists in r0p0 but there is no fix in that
@@ -164,6 +192,7 @@
*/
report_errata ERRATA_V1_1774420, neoverse_v1, 1774420
report_errata ERRATA_V1_1791573, neoverse_v1, 1791573
+ report_errata ERRATA_V1_1852267, neoverse_v1, 1852267
report_errata ERRATA_V1_1940577, neoverse_v1, 1940577
ldp x8, x30, [sp], #16
@@ -188,6 +217,11 @@
bl errata_neoverse_v1_1791573_wa
#endif
+#if ERRATA_V1_1852267
+ mov x0, x18
+ bl errata_neoverse_v1_1852267_wa
+#endif
+
#if ERRATA_V1_1940577
mov x0, x18
bl errata_neoverse_v1_1940577_wa