[RFC PATCH v1 24/30] ArmVirtPkg: Perform Arm CCA initialisation in the Pei phase

["Sami Mujawar" <sami.mujawar@arm.com>]

Add ArmCcaInitialize () to perform Arm CCA specific initialisation
like:
 - Reading the Realm Config by calling the RSI interface.
 - Storing the IPA width of the Realm in PcdArmCcaEarlyIpaWidth.
 - Configuring the MMIO regions to update the page tables to set
   the protection attribute as Unprotected IPA.

Note: ArmCcaInitialize () is implemented in ArmCcaInitPeiLib for
which a Null implementation is provided. Therefore, this change
should not break existing platforms that do not implement the
Arm CCA.

Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
---
 ArmVirtPkg/PrePi/PrePi.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/ArmVirtPkg/PrePi/PrePi.c b/ArmVirtPkg/PrePi/PrePi.c
index 3d943b2138d3fe8a03322262111d5f7df3e39d39..7ece1e07152ebc395c1f21dfabd78df2020cf052 100755
--- a/ArmVirtPkg/PrePi/PrePi.c
+++ b/ArmVirtPkg/PrePi/PrePi.c
@@ -1,6 +1,6 @@
 /** @file
 *
-*  Copyright (c) 2011-2014, ARM Limited. All rights reserved.
+*  Copyright (c) 2011-2023, Arm Limited. All rights reserved.
 *
 *  SPDX-License-Identifier: BSD-2-Clause-Patent
 *
@@ -9,6 +9,7 @@
 #include <PiPei.h>
 #include <Pi/PiBootMode.h>
 
+#include <Library/ArmCcaInitPeiLib.h>
 #include <Library/PeCoffLib.h>
 #include <Library/PrePiLib.h>
 #include <Library/PrintLib.h>
@@ -40,6 +41,7 @@ PrePiMain (
   CHAR8                       Buffer[100];
   UINTN                       CharCount;
   UINTN                       StacksSize;
+  RETURN_STATUS               RetStatus;
 
   // Initialize the architecture specific bits
   ArchInitialize ();
@@ -67,6 +69,12 @@ PrePiMain (
   Status = MemoryPeim (UefiMemoryBase, FixedPcdGet32 (PcdSystemMemoryUefiRegionSize));
   ASSERT_EFI_ERROR (Status);
 
+  // Perform the Arm CCA specific initialisations.
+  RetStatus = ArmCcaInitialize ();
+  if (RETURN_ERROR (RetStatus)) {
+    CpuDeadLoop ();
+  }
+
   // Initialize the Serial Port
   SerialPortInitialize ();
   CharCount = AsciiSPrint (
-- 
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'