fix(cpus): workaround for Cortex-A510 erratum 2080326
Cortex-A510 erratum 2080326 is a Cat B erratum that applies
to all revisions <= r0p2 and is fixed in r0p3.
The workaround sequence helps perform a DSB after each TLBI
instruction and can be applied only for version r0p2 and has
minimal performance impact.
The workaround is not applicable for versions < r0p2.
SDEN documentation:
https://developer.arm.com/documentation/SDEN1873361/latest
Change-Id: Ib9bce8b711c25a79f7b2f891ae6f8b366fc80ddd
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
diff --git a/lib/cpus/aarch64/cortex_a510.S b/lib/cpus/aarch64/cortex_a510.S
index 6fce24e..a59b92c 100644
--- a/lib/cpus/aarch64/cortex_a510.S
+++ b/lib/cpus/aarch64/cortex_a510.S
@@ -57,6 +57,30 @@
check_erratum_ls cortex_a510, ERRATUM(2042739), CPU_REV(0, 2)
+workaround_reset_start cortex_a510, ERRATUM(2080326), ERRATA_A510_2080326
+ /* Apply workaround */
+ mov x0, #1
+ msr S3_6_C15_C4_0, x0
+ isb
+
+ mov x0, #0x0100
+ movk x0, #0x0E08, lsl #16
+ msr S3_6_C15_C4_2, x0
+
+ mov x0, #0x0300
+ movk x0, #0x0F1F, lsl #16
+ movk x0, #0x0008, lsl #32
+ msr S3_6_C15_C4_3, x0
+
+ mov x0, #0x03F1
+ movk x0, #0x00C0, lsl #16
+ msr S3_6_C15_C4_1, x0
+
+ isb
+workaround_reset_end cortex_a510, ERRATUM(2080326)
+
+check_erratum_range cortex_a510, ERRATUM(2080326), CPU_REV(0, 2), CPU_REV(0, 2)
+
workaround_reset_start cortex_a510, ERRATUM(2172148), ERRATA_A510_2172148
/*
* Force L2 allocation of transient lines by setting
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index e12795f..e7b0e54 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -769,6 +769,11 @@
# present in r0p0 and r0p1 but there is no workaround for those revisions.
CPU_FLAG_LIST += ERRATA_A510_2041909
+# Flag to aply erratum 2080326 workaround during reset. This erratum applies
+# to revision r0p2 of the Cortex-A510 cpu and is fixed in r0p3. The issue is
+# also present in r0p0 and r0p1 but there is no workaround for those revisions.
+CPU_FLAG_LIST += ERRATA_A510_2080326
+
# Flag to apply erratum 2250311 workaround during reset. This erratum applies
# to revisions r0p0, r0p1, r0p2, r0p3 and r1p0, and is fixed in r1p1.
CPU_FLAG_LIST += ERRATA_A510_2250311