ArmPlatformPkg/ArmPlatformLib: Introduce ArmPlatformSecBootAction function

This function is called at the initial stage of the Secure boot process to allow
platform vendors to add early actions.



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12413 6f19259b-4bc3-4df7-8a09-765794883524

ArmPlatformPkg/Include/Library/ArmPlatformLib.h

@@ -82,6 +82,20 @@ ArmPlatformGetBootMode (
   VOID
   );
 
+/**
+  Call at the beginning of the platform boot up
+
+  This function allows the firmware platform to do extra actions at the early
+  stage of the platform power up.
+
+  Note: This function must be implemented in assembler as there is no stack set up yet
+
+**/
+VOID
+ArmPlatformSecBootAction (
+  VOID
+  );
+
 /**
   Initialize controllers that must setup at the early stage