tree ca021f9ea22262206b6f927fcb6e1ec254f707bb
parent 702303fe3b3525b2b04ce23b5ce4f9adbb746e79
author Stas Sergeev <stsp@users.sourceforge.net> 1619724730 +0300
committer Joanna Farley <joanna.farley@arm.com> 1631712262 +0200

fix(drivers/tzc400): never disable filter 0

Disabling filter 0 causes inability to access DRAM.
An attempt leads to an abort.
ARM manual disallows to disable filter 0, but if we do
that from SRAM, nothing bad happens.

This patch prevents disabling of a filter 0, allowing to
reconfigure other filters from DRAM.

Note: this patch doesn't change the logic after reset.
It is only needed in case someone wants to reconfigure the
previously configured TZASC.

Change-Id: I196a0cb110a89afbde97f64a94df3101f28708a4
Signed-off-by: stsp@users.sourceforge.net