Dualcpu: Move dual-cpu NS files into a dedicated folder

Gather all the dual-cpu NS .c files in a dedicated folder
multi_core under interface/src.
Put all the dual-cpu interface header files in a dedicated folder
multi-core under interface/include.

Change-Id: Ia6847eb03a663e66260690ad88addb1521f13fcd
Signed-off-by: David Hu <david.hu@arm.com>
diff --git a/interface/CMakeLists.txt b/interface/CMakeLists.txt
index 276a720..0351754 100644
--- a/interface/CMakeLists.txt
+++ b/interface/CMakeLists.txt
@@ -1,5 +1,5 @@
 #-------------------------------------------------------------------------------
-# Copyright (c) 2020, Arm Limited. All rights reserved.
+# Copyright (c) 2020-2021, Arm Limited. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -27,6 +27,7 @@
         ${CMAKE_CURRENT_SOURCE_DIR}/include
         ${CMAKE_BINARY_DIR}/generated/interface/include
         ${CMAKE_CURRENT_SOURCE_DIR}/include/os_wrapper
+        $<$<OR:$<BOOL:${FORWARD_PROT_MSG}>,$<BOOL:${TFM_MULTI_CORE_TOPOLOGY}>>:${CMAKE_CURRENT_SOURCE_DIR}/include/multi_core>
 )
 
 # PSA interface files are generated from a template
diff --git a/interface/include/tfm_mailbox.h b/interface/include/multi_core/tfm_mailbox.h
similarity index 100%
rename from interface/include/tfm_mailbox.h
rename to interface/include/multi_core/tfm_mailbox.h
diff --git a/interface/include/tfm_multi_core_api.h b/interface/include/multi_core/tfm_multi_core_api.h
similarity index 100%
rename from interface/include/tfm_multi_core_api.h
rename to interface/include/multi_core/tfm_multi_core_api.h
diff --git a/interface/include/tfm_ns_mailbox.h b/interface/include/multi_core/tfm_ns_mailbox.h
similarity index 100%
rename from interface/include/tfm_ns_mailbox.h
rename to interface/include/multi_core/tfm_ns_mailbox.h
diff --git a/interface/src/tfm_multi_core_ns_api.c b/interface/src/multi_core/tfm_multi_core_ns_api.c
similarity index 100%
rename from interface/src/tfm_multi_core_ns_api.c
rename to interface/src/multi_core/tfm_multi_core_ns_api.c
diff --git a/interface/src/tfm_multi_core_psa_ns_api.c b/interface/src/multi_core/tfm_multi_core_psa_ns_api.c
similarity index 100%
rename from interface/src/tfm_multi_core_psa_ns_api.c
rename to interface/src/multi_core/tfm_multi_core_psa_ns_api.c
diff --git a/interface/src/tfm_ns_mailbox.c b/interface/src/multi_core/tfm_ns_mailbox.c
similarity index 100%
rename from interface/src/tfm_ns_mailbox.c
rename to interface/src/multi_core/tfm_ns_mailbox.c
diff --git a/interface/src/tfm_ns_mailbox_rtos_api.c b/interface/src/multi_core/tfm_ns_mailbox_rtos_api.c
similarity index 100%
rename from interface/src/tfm_ns_mailbox_rtos_api.c
rename to interface/src/multi_core/tfm_ns_mailbox_rtos_api.c