fix(cpus): workaround for Cortex-A710 erratum 2282622
Cortex-A710 erratum 2282622 is a Cat B erratum that applies to
all revisions <=r2p1 and is still open. The workaround was earlier
applied to all revisions <= r2p0, this patch extends it to r2p1.
This was thought to have been fixed in r2p1 which is not the case.
SDEN documentation:
https://developer.arm.com/documentation/SDEN1775101/latest
Signed-off-by: Bipin Ravi <bipin.ravi@arm.com>
Change-Id: Iad38a7fe57bec3f2d8977995acd601dcd9ae69c0
diff --git a/lib/cpus/aarch64/cortex_a710.S b/lib/cpus/aarch64/cortex_a710.S
index 3ea55df..cebd6f0 100644
--- a/lib/cpus/aarch64/cortex_a710.S
+++ b/lib/cpus/aarch64/cortex_a710.S
@@ -355,22 +355,22 @@
/* ---------------------------------------------------------------
* Errata Workaround for Cortex-A710 Erratum 2282622.
- * This applies to revision r0p0, r1p0 and r2p0.
- * It is fixed in r2p1.
+ * This applies to revision r0p0, r1p0, r2p0 and r2p1.
+ * It is still open.
* Inputs:
* x0: variant[4:7] and revision[0:3] of current cpu.
* Shall clobber: x0, x1, x17
* ---------------------------------------------------------------
*/
func errata_a710_2282622_wa
- /* Compare x0 against revision r2p0 */
+ /* Compare x0 against revision r2p1 */
mov x17, x30
bl check_errata_2282622
cbz x0, 1f
/* Apply the workaround */
mrs x1, CORTEX_A710_CPUACTLR2_EL1
- orr x1, x1, BIT(0)
+ orr x1, x1, #BIT(0)
msr CORTEX_A710_CPUACTLR2_EL1, x1
1:
@@ -378,8 +378,8 @@
endfunc errata_a710_2282622_wa
func check_errata_2282622
- /* Applies to r0p0, r1p0 and r2p0 */
- mov x1, #0x20
+ /* Applies to r0p0, r1p0, r2p0 and r2p1 */
+ mov x1, #0x21
b cpu_rev_var_ls
endfunc check_errata_2282622