tree 2a142ebb03f40ee43f67c5ece5ed45163e03bd8f
parent e9211ca09ab4183688cdd2d167fbab609bead286
author Bipin Ravi <bipin.ravi@arm.com> 1693335549 -0500
committer Varun Wadekar <vwadekar@nvidia.com> 1699023221 +0000

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
(cherry picked from commit 74bfe31fd2c992d8e1e13bf396a9d5c136967ca5)