diff --git a/include/services/sdei.h b/include/services/sdei.h
index ae8c7e4..063ed6f 100644
--- a/include/services/sdei.h
+++ b/include/services/sdei.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -9,6 +9,7 @@
 
 #include <lib/spinlock.h>
 #include <lib/utils_def.h>
+#include <services/sdei_flags.h>
 
 /* Range 0xC4000020 - 0xC400003F reserved for SDE 64bit smc calls */
 #define SDEI_VERSION				0xC4000020U
@@ -41,50 +42,6 @@
 #define SDEI_EV_HANDLED		0U
 #define SDEI_EV_FAILED		1U
 
-/* Internal: SDEI flag bit positions */
-#define SDEI_MAPF_DYNAMIC_SHIFT_	1U
-#define SDEI_MAPF_BOUND_SHIFT_		2U
-#define SDEI_MAPF_SIGNALABLE_SHIFT_	3U
-#define SDEI_MAPF_PRIVATE_SHIFT_	4U
-#define SDEI_MAPF_CRITICAL_SHIFT_	5U
-#define SDEI_MAPF_EXPLICIT_SHIFT_	6U
-
-/* SDEI event 0 */
-#define SDEI_EVENT_0	0
-
-/* Placeholder interrupt for dynamic mapping */
-#define SDEI_DYN_IRQ	0U
-
-/* SDEI flags */
-
-/*
- * These flags determine whether or not an event can be associated with an
- * interrupt. Static events are permanently associated with an interrupt, and
- * can't be changed at runtime.  Association of dynamic events with interrupts
- * can be changed at run time using the SDEI_INTERRUPT_BIND and
- * SDEI_INTERRUPT_RELEASE calls.
- *
- * SDEI_MAPF_DYNAMIC only indicates run time configurability, where as
- * SDEI_MAPF_BOUND indicates interrupt association. For example:
- *
- *  - Calling SDEI_INTERRUPT_BIND on a dynamic event will have both
- *    SDEI_MAPF_DYNAMIC and SDEI_MAPF_BOUND set.
- *
- *  - Statically-bound events will always have SDEI_MAPF_BOUND set, and neither
- *    SDEI_INTERRUPT_BIND nor SDEI_INTERRUPT_RELEASE can be called on them.
- *
- * See also the is_map_bound() macro.
- */
-#define SDEI_MAPF_DYNAMIC	BIT(SDEI_MAPF_DYNAMIC_SHIFT_)
-#define SDEI_MAPF_BOUND		BIT(SDEI_MAPF_BOUND_SHIFT_)
-#define SDEI_MAPF_EXPLICIT	BIT(SDEI_MAPF_EXPLICIT_SHIFT_)
-
-#define SDEI_MAPF_SIGNALABLE	BIT(SDEI_MAPF_SIGNALABLE_SHIFT_)
-#define SDEI_MAPF_PRIVATE	BIT(SDEI_MAPF_PRIVATE_SHIFT_)
-
-#define SDEI_MAPF_NORMAL	0
-#define SDEI_MAPF_CRITICAL	BIT(SDEI_MAPF_CRITICAL_SHIFT_)
-
 /* Indices of private and shared mappings */
 #define SDEI_MAP_IDX_PRIV_	0U
 #define SDEI_MAP_IDX_SHRD_	1U