Docs: Update broken URLs

Signed-off-by: Anton Komlev <anton.komlev@arm.com>
Change-Id: I9649113504e174d0f1e8d2b59eb731d0d26c87f6
diff --git a/docs/technical_references/design_docs/ff_isolation.rst b/docs/technical_references/design_docs/ff_isolation.rst
index daa8b48..cdc98d1 100644
--- a/docs/technical_references/design_docs/ff_isolation.rst
+++ b/docs/technical_references/design_docs/ff_isolation.rst
@@ -390,11 +390,13 @@
 ========
 | `PSA Firmware_Framework for M`_
 
-.. _PSA Firmware_Framework for M: https://pages.arm.com/psa-resources-ff.html
+.. _PSA Firmware_Framework for M:
+  https://www.arm.com/architecture/security-features/platform-security
 
 | `Trusted Base System Architecture for Armv6-M, Armv7-M and Armv8-M`_
 
-.. _Trusted Base System Architecture for Armv6-M, Armv7-M and Armv8-M: https://pages.arm.com/psa-resources-tbsa-m.html
+.. _Trusted Base System Architecture for Armv6-M, Armv7-M and Armv8-M:
+   https://www.arm.com/architecture/security-features/platform-security
 
 --------------
 
diff --git a/docs/technical_references/design_docs/tfm_psa_inter_process_communication.rst b/docs/technical_references/design_docs/tfm_psa_inter_process_communication.rst
index 757bba3..4107666 100644
--- a/docs/technical_references/design_docs/tfm_psa_inter_process_communication.rst
+++ b/docs/technical_references/design_docs/tfm_psa_inter_process_communication.rst
@@ -222,8 +222,8 @@
 | `Slides includes IPC basic introduction URL`_
 | `IPC model implementation URL`_
 
-.. _PSA Firmware Framework specification URL: https://pages.arm.com/psa-
-  resources-ff.html?_ga=2.156169596.61580709.1542617040-1290528876.1541647333
+.. _PSA Firmware Framework specification URL:
+  https://www.arm.com/architecture/security-features/platform-security
 .. _Slides includes IPC basic introduction URL: https://connect.linaro.org/
   resources/yvr18/sessions/yvr18-108/
 .. _IPC model implementation URL: https://www.youtube.com/watch?v=6wEFoq49qUw