fix(cpus): workaround for Neoverse N2 erratum 2009478
Neoverse N2 erratum 2009478 is a Cat B erratum that applies to
revision r0p0 and is fixed in r0p1. The workaround is to clear
the ED bit for all core error records before setting the PWRDN_EN
bit in CPUPWRCTLR_EL1 to request a power down.
SDEN documentation:
https://developer.arm.com/documentation/SDEN1982442/latest
Signed-off-by: Bipin Ravi <bipin.ravi@arm.com>
Change-Id: Ic5ef58c9e795b90026af1d2b09edc0eea3ceee51
diff --git a/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index bb12d7d..c1a3cb7 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -603,6 +603,9 @@
- ``ERRATA_N2_2002655``: This applies errata 2002655 workaround to Neoverse-N2
CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1.
+- ``ERRATA_N2_2009478``: This applies errata 2009478 workaround to Neoverse-N2
+ CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1.
+
- ``ERRATA_N2_2067956``: This applies errata 2067956 workaround to Neoverse-N2
CPU. This needs to be enabled for revision r0p0 of the CPU and is fixed in r0p1.