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+######################
+TF-M Example Partition
+######################
+The TF-M example partition is a simple Secure Partition implementation provided
+to aid development of new Secure Partitions.
+
+It is an Application RoT, SFN model Secure Partition and implements an
+connection-based RoT Service.
+
+Please refer to `PSA Firmware Framework 1.0`_
+and `Firmware Framework for M 1.1 Extensions`_
+for details of the attributes of Secure Partitions.
+
+Please refer to `Adding Secure Partition`_
+for more details of adding a new Secure Partition to TF-M.
+
+**************
+File structure
+**************
+
+.. code-block:: bash
+
+   .
+   ├── CMakeLists.txt
+   ├── README.rst
+   ├── tfm_example_manifest_list.yaml
+   ├── tfm_example_partition_api.c
+   ├── tfm_example_partition_api.h
+   ├── tfm_example_partition.c
+   └── tfm_example_partition.yaml
+
+- ``CMakeLists.txt``
+
+  The CMake file for building this example Secure Partitions.
+  It is specific to the TF-M build system.
+
+- ``README.rst``
+
+  This document.
+
+- ``tfm_example_partition.yaml``
+
+  The manifest of this Secure Partition.
+
+- ``tfm_example_manifest_list.yaml``
+
+  The manifest list that describes the Secure Partition manifest of this Secure
+  Partition. See `TF-M Manifest List`_ for details of manifest lists.
+
+- ``tfm_example_partition.c``
+
+  The core implementation of this Secure Partition.
+
+- ``tfm_example_partition_api.c``
+
+  The APIs for accessing the RoT Services provided by this Secure Partition.
+
+- ``tfm_example_partition_api.h``
+
+  The header file that declares the RoT Services APIs.
+
+************
+How to Build
+************
+It is recommended to build this example Secure Partition via out-of-tree build.
+It can minimize the changes to TF-M source code for building and testing the
+example.
+
+To build, append the following extra build configurations to the CMake build
+commands.
+
+- ``-DTFM_PARTITION_EXAMPLE``
+
+  This is the configuration switch to enable or disable building this example.
+  Set to ``ON`` to enable or ``OFF`` to disable.
+
+- ``-DTFM_EXTRA_PARTITION_PATHS``
+
+  Set it to the absolute path of this directory.
+
+- ``-DTFM_EXTRA_MANIFEST_LIST_FILES``
+
+  Set it to the absolute path of the manifest list mentioned above -
+  ``tfm_example_manifest_list.yaml``.
+
+Refer to `Out-of-tree Secure Partition build`_ for more details.
+
+***********
+How to Test
+***********
+To test the RoT Services, you need to build the APIs and call the service APIs
+somewhere.
+
+If you want to add comprehensive tests using the TF-M test framework, please
+refer to `Adding TF-M Regression Test Suite`_.
+
+Testing in NSPE
+===============
+Any NSPE can be used to test the example RoT services.
+If you are using the tf-m-tests repo as NSPE, you can:
+
+- Add the ``tfm_example_partition_api.c`` to ``tfm_ns_api`` CMake library.
+- Add the current directory in the include directory of ``tfm_ns_api``.
+- Call the services APIs in the ``test_app`` function.
+
+Testing in SPE
+==============
+
+Testing in SPE is to test requesting the RoT Services in any Secure Partition.
+
+- Add the example services to the ``dependencies`` attribute in the target
+  Secure Partition's manifest.
+- Call the services APIs somewhere in the Secure Partition, for example, in the
+  entry function.
+
+Note that the API source file has already been added in the ``CMakeLists.txt``.
+There are no extra steps to build the APIs for testing in SPE.
+
+**********
+References
+**********
+
+| `PSA Firmware Framework 1.0`_
+| `Firmware Framework for M 1.1 Extensions`_
+| `Adding Secure Partition`_
+| `TF-M Manifest List`_
+| `Out-of-tree Secure Partition build`_
+| `Adding TF-M Regression Test Suite`_
+
+.. _PSA Firmware Framework 1.0:
+  https://developer.arm.com/-/media/Files/pdf/PlatformSecurityArchitecture/Architect/DEN0063-PSA_Firmware_Framework-1.0.0-2.pdf?revision=2d1429fa-4b5b-461a-a60e-4ef3d8f7f4b4
+
+.. _Firmware Framework for M 1.1 Extensions:
+  https://documentation-service.arm.com/static/600067c09b9c2d1bb22cd1c5?token=
+
+.. _Adding Secure Partition:
+  https://tf-m-user-guide.trustedfirmware.org/integration_guide/services/tfm_secure_partition_addition.html
+
+.. _TF-M Manifest List:
+  https://tf-m-user-guide.trustedfirmware.org/integration_guide/services/tfm_manifest_tool_user_guide.html#manifest-list
+
+.. _Out-of-tree Secure Partition build:
+  https://tf-m-user-guide.trustedfirmware.org/integration_guide/services/tfm_secure_partition_addition.html#out-of-tree-secure-partition-build
+
+.. _Adding TF-M Regression Test Suite:
+  https://git.trustedfirmware.org/TF-M/tf-m-tests.git/tree/docs/tfm_test_suites_addition.rst
+
+--------------
+
+*Copyright (c) 2020-2022, Arm Limited. All rights reserved.*