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+.. SPDX-License-Identifier: CC-BY-SA-4.0
+
+.. Copyright (C) 1988, 2008 On-Line Applications Research Corporation (OAR)
+
+Directives
+==========
+
+This section details the Initialization Manager's directives.  A subsection is
+dedicated to each of this manager's directives and describes the calling
+sequence, related constants, usage, and status codes.
+
+.. raw:: latex
+
+   \clearpage
+
+.. index:: initialize RTEMS
+.. index:: start multitasking
+.. index:: rtems_initialize_executive
+
+.. _rtems_initialize_executive:
+
+INITIALIZE_EXECUTIVE - Initialize RTEMS
+---------------------------------------
+
+CALLING SEQUENCE:
+    .. code-block:: c
+
+        void rtems_initialize_executive(void);
+
+DIRECTIVE STATUS CODES:
+    NONE - This function will not return to the caller.
+
+DESCRIPTION:
+    Iterates through the system initialization linker set and invokes the
+    registered handlers.  The final step is to start multitasking.
+
+NOTES:
+    This directive should be called by :c:func:`boot_card()` only.
+
+    This directive *does not return* to the caller.  Errors in the
+    initialization sequence are usually fatal and lead to a system termination.