diff --git a/tools/documentation/tfm_copy_files.py b/tools/documentation/tfm_copy_files.py
new file mode 100644
index 0000000..09226c8
--- /dev/null
+++ b/tools/documentation/tfm_copy_files.py
@@ -0,0 +1,87 @@
+# -----------------------------------------------------------------------------
+# Copyright (c) 2020, Arm Limited. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+#
+# -----------------------------------------------------------------------------
+
+# Interface module for pre-processing the documentation content
+# before sphynx-build is called
+#
+# It collects files from multiple sources in a intermediate location
+# before calling sphinx-build, thus overriding the limitation
+# of having the documentation share a common root directory.
+#
+# It can be triggered by simply importing the module
+import os
+from shutil import copy2, copytree, rmtree, move
+from glob import glob
+from tfm_cmake_defaults import *
+from subprocess import call
+
+
+def tfm_copy_files():
+    doc_files = []
+
+    # Recursively list all files with extensions and add them
+    for _path in document_scan_dirs:
+        _path = os.path.abspath(os.path.join(tfm_def_root_dir, _path))
+        for ext in document_scan_ext:
+                doc_files.extend([f for f in glob(os.path.join(_path,
+                                                               "**/*%s" % ext),
+                                  recursive=True)])
+
+    # Add the extra files
+    for _doc_file in documents_extra:
+        _doc_file = os.path.abspath(os.path.join(tfm_def_root_dir, _doc_file))
+        if os.path.isfile(_doc_file):
+            doc_files.append(_doc_file)
+
+    # Clean up all files in target dir except conf.py and tfm_env.py
+    files = [f for f in
+             glob("*", recursive=False) if f not in ["conf.py",
+                                                     tfm_def_conf_out_file,
+                                                     os.path.basename(
+                                                        tfm_def_doxy_output_dir),
+                                                     "tfm_env.py"]]
+    for f in files:
+        if os.path.isfile(f):
+            os.remove(f)
+        elif os.path.isdir(f):
+            rmtree(f)
+
+    # Copy the documentation folder as is
+    copytree(tfm_def_doc_root, tfm_def_copy_doc_root)
+
+    # Move the index to the intermediate build directory
+    # docs/index.rst --> ./index.rst
+    move(os.path.join(tfm_def_copy_doc_root, "index.rst"), tfm_def_copy_dir)
+
+    for df in list(doc_files):
+        # Set the target filename to be cwd + relative to root path of origin
+        target_f = os.path.relpath(df, tfm_def_root_dir)
+        target_f = os.path.join(tfm_def_copy_dir, target_f)
+        # Create path for file (nested) without exception if exists
+        os.makedirs(os.path.dirname(target_f), exist_ok=True)
+        # Copy the file to new location
+        copy2(df, target_f)
+
+
+# Build Doxygen Documnetation
+if tfm_def_build_doxygen:
+    # if conf file is not provided by cmake
+    if tfm_def_render_cmake:
+        render_cmake_file(cmake_env,
+                          tfm_def_doxygen_in_file,
+                          tfm_def_doxygen_out_file)
+    # Call doxygen to generate the documentation
+    doxygen_bin = find_package("doxygen")
+    call([doxygen_bin, tfm_def_doxygen_out_file])
+
+# Only act if requested by defaults
+if tfm_def_copy_files:
+    tfm_copy_files()
+
+if tfm_def_render_cmake:
+    # Render the conf_py file
+    render_cmake_file(cmake_env, tfm_def_conf_in_file, tfm_def_conf_out_file)