Update specifications section
Update the documentation on supported specifications:
- clean up PSA related info.
- add a page on FF-A
Change-Id: I68e8e7762bdce765f38acf503d1d762deb104cc7
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
diff --git a/docs/standards/ff-a.rst b/docs/standards/ff-a.rst
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+Firmware Framework for Armv8-A
+==============================
+
+|FF-A| is a standard which *"describes interfaces that standardize communication between the various software images. This
+includes communication between images in the Secure world and Normal world."*
+
+Trusted Services is the home of the FF-A S-EL0 Secure Partitions implementing PSA functionality. The component :ref:`libsp`
+captures helpful abstractions to allow easy FF-A compliant S-EL0 SP development. S-EL0 SPs are SPMC agonistic and can be used
+with an SPMC running in any higher secure exception level (S-EL1 - S-EL3). Currently the solution is tested with an SPMC
+running at S-SEL1 integrated into OP-TEE OS.
+
+--------------
+
+.. _`PSA homepage`: https://developer.arm.com/architectures/security-architectures/platform-security-architecture
+.. _`www.psacertified.org`: https://www.psacertified.org/certified-products/
+.. _`Hafnium project`: https://www.trustedfirmware.org/projects/hafnium/
+
+*Copyright (c) 2021, Arm Limited and Contributors. All rights reserved.*
+
+SPDX-License-Identifier: BSD-3-Clause