diff --git a/Makefile b/Makefile
index a837846..b270e15 100644
--- a/Makefile
+++ b/Makefile
@@ -378,6 +378,16 @@
 $(error "BL2_IN_XIP_MEM is only supported when BL2_AT_EL3 is enabled")
 endif
 
+# SMC Calling Convention checks
+ifneq (${SMCCC_MAJOR_VERSION},1)
+    ifneq (${SPD},none)
+        $(error "SMC Calling Convention 1.X must be used with SPDs")
+    endif
+    ifeq (${ARCH},aarch32)
+        $(error "Only SMCCC 1.X is supported in AArch32 mode.")
+    endif
+endif
+
 ################################################################################
 # Process platform overrideable behaviour
 ################################################################################
@@ -527,6 +537,7 @@
 
 $(eval $(call assert_numeric,ARM_ARCH_MAJOR))
 $(eval $(call assert_numeric,ARM_ARCH_MINOR))
+$(eval $(call assert_numeric,SMCCC_MAJOR_VERSION))
 
 ################################################################################
 # Add definitions to the cpp preprocessor based on the current build options.
@@ -563,6 +574,7 @@
 $(eval $(call add_define,PSCI_EXTENDED_STATE_ID))
 $(eval $(call add_define,RESET_TO_BL31))
 $(eval $(call add_define,SEPARATE_CODE_AND_RODATA))
+$(eval $(call add_define,SMCCC_MAJOR_VERSION))
 $(eval $(call add_define,SPD_${SPD}))
 $(eval $(call add_define,SPIN_ON_BL1_EXIT))
 $(eval $(call add_define,TRUSTED_BOARD_BOOT))
diff --git a/bl31/aarch64/runtime_exceptions.S b/bl31/aarch64/runtime_exceptions.S
index 60be932..1c3ed3f 100644
--- a/bl31/aarch64/runtime_exceptions.S
+++ b/bl31/aarch64/runtime_exceptions.S
@@ -11,6 +11,7 @@
 #include <interrupt_mgmt.h>
 #include <platform_def.h>
 #include <runtime_svc.h>
+#include <smccc.h>
 
 	.globl	runtime_exceptions
 
@@ -289,6 +290,37 @@
 
 
 	/* ---------------------------------------------------------------------
+	 * This macro takes an argument in x16 that is the index in the
+	 * 'rt_svc_descs_indices' array, checks that the value in the array is
+	 * valid, and loads in x15 the pointer to the handler of that service.
+	 * ---------------------------------------------------------------------
+	 */
+	.macro	load_rt_svc_desc_pointer
+	/* Load descriptor index from array of indices */
+	adr	x14, rt_svc_descs_indices
+	ldrb	w15, [x14, x16]
+
+#if SMCCC_MAJOR_VERSION == 1
+	/* Any index greater than 127 is invalid. Check bit 7. */
+	tbnz	w15, 7, smc_unknown
+#elif SMCCC_MAJOR_VERSION == 2
+	/* Verify that the top 3 bits of the loaded index are 0 (w15 <= 31) */
+	cmp	w15, #31
+	b.hi	smc_unknown
+#endif /* SMCCC_MAJOR_VERSION */
+
+	/*
+	 * Get the descriptor using the index
+	 * x11 = (base + off), w15 = index
+	 *
+	 * handler = (base + off) + (index << log2(size))
+	 */
+	adr	x11, (__RT_SVC_DESCS_START__ + RT_SVC_DESC_HANDLE)
+	lsl	w10, w15, #RT_SVC_SIZE_LOG2
+	ldr	x15, [x11, w10, uxtw]
+	.endm
+
+	/* ---------------------------------------------------------------------
 	 * The following code handles secure monitor calls.
 	 * Depending upon the execution state from where the SMC has been
 	 * invoked, it frees some general purpose registers to perform the
@@ -311,23 +343,53 @@
 	 * now). x6 will point to the context structure (SP_EL3) and x7 will
 	 * contain flags we need to pass to the handler.
 	 *
-	 * Save x4-x29 and sp_el0.  Refer to SMCCC v1.1.
+	 * Save x4-x29 and sp_el0.
 	 */
 	save_x4_to_x29_sp_el0
 
 	mov	x5, xzr
 	mov	x6, sp
 
+#if SMCCC_MAJOR_VERSION == 1
+
 	/* Get the unique owning entity number */
 	ubfx	x16, x0, #FUNCID_OEN_SHIFT, #FUNCID_OEN_WIDTH
 	ubfx	x15, x0, #FUNCID_TYPE_SHIFT, #FUNCID_TYPE_WIDTH
 	orr	x16, x16, x15, lsl #FUNCID_OEN_WIDTH
 
-	adr	x11, (__RT_SVC_DESCS_START__ + RT_SVC_DESC_HANDLE)
+	load_rt_svc_desc_pointer
 
-	/* Load descriptor index from array of indices */
-	adr	x14, rt_svc_descs_indices
-	ldrb	w15, [x14, x16]
+#elif SMCCC_MAJOR_VERSION == 2
+
+	/* Bit 31 must be set */
+	tbz	x0, #FUNCID_TYPE_SHIFT, smc_unknown
+
+	/*
+	 * Check MSB of namespace to decide between compatibility/vendor and
+	 * SPCI/SPRT
+	 */
+	tbz	x0, #(FUNCID_NAMESPACE_SHIFT + 1), compat_or_vendor
+
+	/* Namespaces SPRT and SPCI currently unimplemented */
+	b	smc_unknown
+
+compat_or_vendor:
+
+	/* Namespace is b'00 (compatibility) or b'01 (vendor) */
+
+	/*
+	 * Add the LSB of the namespace (bit [28]) to the OEN [27:24] to create
+	 * a 5-bit index into the rt_svc_descs_indices array.
+	 *
+	 * The low 16 entries of the rt_svc_descs_indices array correspond to
+	 * OENs of the compatibility namespace and the top 16 entries of the
+	 * array are assigned to the vendor namespace descriptor.
+	 */
+	ubfx	x16, x0, #FUNCID_OEN_SHIFT, #(FUNCID_OEN_WIDTH + 1)
+
+	load_rt_svc_desc_pointer
+
+#endif /* SMCCC_MAJOR_VERSION */
 
 	/*
 	 * Restore the saved C runtime stack value which will become the new
@@ -336,25 +398,10 @@
 	 */
 	ldr	x12, [x6, #CTX_EL3STATE_OFFSET + CTX_RUNTIME_SP]
 
-	/*
-	 * Any index greater than 127 is invalid. Check bit 7 for
-	 * a valid index
-	 */
-	tbnz	w15, 7, smc_unknown
-
 	/* Switch to SP_EL0 */
 	msr	spsel, #0
 
 	/*
-	 * Get the descriptor using the index
-	 * x11 = (base + off), x15 = index
-	 *
-	 * handler = (base + off) + (index << log2(size))
-	 */
-	lsl	w10, w15, #RT_SVC_SIZE_LOG2
-	ldr	x15, [x11, w10, uxtw]
-
-	/*
 	 * Save the SPSR_EL3, ELR_EL3, & SCR_EL3 in case there is a world
 	 * switch during SMC handling.
 	 * TODO: Revisit if all system registers can be saved later.
diff --git a/common/runtime_svc.c b/common/runtime_svc.c
index de80f30..f997c74 100644
--- a/common/runtime_svc.c
+++ b/common/runtime_svc.c
@@ -26,8 +26,10 @@
 					/ sizeof(rt_svc_desc_t))
 
 /*******************************************************************************
- * Function to invoke the registered `handle` corresponding to the smc_fid.
+ * Function to invoke the registered `handle` corresponding to the smc_fid in
+ * AArch32 mode.
  ******************************************************************************/
+#if SMCCC_MAJOR_VERSION == 1
 uintptr_t handle_runtime_svc(uint32_t smc_fid,
 			     void *cookie,
 			     void *handle,
@@ -53,6 +55,7 @@
 	return rt_svc_descs[index].handle(smc_fid, x1, x2, x3, x4, cookie,
 						handle, flags);
 }
+#endif /* SMCCC_MAJOR_VERSION */
 
 /*******************************************************************************
  * Simple routine to sanity check a runtime service descriptor before using it
@@ -68,12 +71,17 @@
 	if (desc->end_oen >= OEN_LIMIT)
 		return -EINVAL;
 
-	if (desc->call_type != SMC_TYPE_FAST &&
-			desc->call_type != SMC_TYPE_YIELD)
+#if SMCCC_MAJOR_VERSION == 1
+	if ((desc->call_type != SMC_TYPE_FAST) &&
+	    (desc->call_type != SMC_TYPE_YIELD))
 		return -EINVAL;
+#elif SMCCC_MAJOR_VERSION == 2
+	if (desc->is_vendor > 1U)
+		return -EINVAL;
+#endif /* SMCCC_MAJOR_VERSION */
 
 	/* A runtime service having no init or handle function doesn't make sense */
-	if (desc->init == NULL && desc->handle == NULL)
+	if ((desc->init == NULL) && (desc->handle == NULL))
 		return -EINVAL;
 
 	return 0;
@@ -96,7 +104,7 @@
 			(RT_SVC_DECS_NUM < MAX_RT_SVCS));
 
 	/* If no runtime services are implemented then simply bail out */
-	if (RT_SVC_DECS_NUM == 0)
+	if (RT_SVC_DECS_NUM == 0U)
 		return;
 
 	/* Initialise internal variables to invalid state */
@@ -140,11 +148,18 @@
 		 * descriptor which will handle the SMCs for this owning
 		 * entity range.
 		 */
-		start_idx = get_unique_oen(rt_svc_descs[index].start_oen,
-				service->call_type);
-		assert(start_idx < MAX_RT_SVCS);
-		end_idx = get_unique_oen(rt_svc_descs[index].end_oen,
-				service->call_type);
+#if SMCCC_MAJOR_VERSION == 1
+		start_idx = get_unique_oen(service->start_oen,
+					   service->call_type);
+		end_idx = get_unique_oen(service->end_oen,
+					 service->call_type);
+#elif SMCCC_MAJOR_VERSION == 2
+		start_idx = get_rt_desc_idx(service->start_oen,
+					    service->is_vendor);
+		end_idx = get_rt_desc_idx(service->end_oen,
+					  service->is_vendor);
+#endif
+		assert(start_idx <= end_idx);
 		assert(end_idx < MAX_RT_SVCS);
 		for (; start_idx <= end_idx; start_idx++)
 			rt_svc_descs_indices[start_idx] = index;
diff --git a/docs/user-guide.rst b/docs/user-guide.rst
index f8bc4be..aed54a6 100644
--- a/docs/user-guide.rst
+++ b/docs/user-guide.rst
@@ -573,6 +573,11 @@
    pages" section in `Firmware Design`_. This flag is disabled by default and
    affects all BL images.
 
+-  ``SMCCC_MAJOR_VERSION``: Numeric value that indicates the major version of
+   the SMC Calling Convention that the Trusted Firmware supports. The only two
+   allowed values are 1 and 2, and it defaults to 1. The minor version is
+   determined using this value.
+
 -  ``SPD``: Choose a Secure Payload Dispatcher component to be built into TF-A.
    This build option is only valid if ``ARCH=aarch64``. The value should be
    the path to the directory containing the SPD source, relative to
diff --git a/include/common/runtime_svc.h b/include/common/runtime_svc.h
index 706c211..b8cf8de 100644
--- a/include/common/runtime_svc.h
+++ b/include/common/runtime_svc.h
@@ -8,8 +8,9 @@
 #define __RUNTIME_SVC_H__
 
 #include <bl_common.h>		/* to include exception types */
+#include <cassert.h>
 #include <smccc_helpers.h>	/* to include SMCCC definitions */
-
+#include <utils_def.h>
 
 /*******************************************************************************
  * Structure definition, typedefs & constants for the runtime service framework
@@ -32,11 +33,20 @@
 
 
 /*
- * The function identifier has 6 bits for the owning entity number and
- * single bit for the type of smc call. When taken together these
- * values limit the maximum number of runtime services to 128.
+ * In SMCCC 1.X, the function identifier has 6 bits for the owning entity number
+ * and a single bit for the type of smc call. When taken together, those values
+ * limit the maximum number of runtime services to 128.
+ *
+ * In SMCCC 2.X the type bit is always 1 and there are only 4 OEN bits in the
+ * compatibility namespace, so the total number of services is 16. The LSB of
+ * namespace is also added to these 4 bits to make space for the vendor service
+ * handler and so the total number of runtime services is 32.
  */
+#if SMCCC_MAJOR_VERSION == 1
 #define MAX_RT_SVCS		128
+#elif SMCCC_MAJOR_VERSION == 2
+#define MAX_RT_SVCS		32
+#endif
 
 #ifndef __ASSEMBLY__
 
@@ -60,24 +70,62 @@
 typedef struct rt_svc_desc {
 	uint8_t start_oen;
 	uint8_t end_oen;
+#if SMCCC_MAJOR_VERSION == 1
 	uint8_t call_type;
+#elif SMCCC_MAJOR_VERSION == 2
+	uint8_t is_vendor;
+#endif
 	const char *name;
 	rt_svc_init_t init;
 	rt_svc_handle_t handle;
 } rt_svc_desc_t;
 
 /*
- * Convenience macro to declare a service descriptor
+ * Convenience macros to declare a service descriptor
  */
-#define DECLARE_RT_SVC(_name, _start, _end, _type, _setup, _smch) \
-	static const rt_svc_desc_t __svc_desc_ ## _name \
-		__section("rt_svc_descs") __used = { \
-			.start_oen = _start, \
-			.end_oen = _end, \
-			.call_type = _type, \
-			.name = #_name, \
-			.init = _setup, \
-			.handle = _smch }
+#if SMCCC_MAJOR_VERSION == 1
+
+#define DECLARE_RT_SVC(_name, _start, _end, _type, _setup, _smch)	\
+	static const rt_svc_desc_t __svc_desc_ ## _name			\
+		__section("rt_svc_descs") __used = {			\
+			.start_oen = _start,				\
+			.end_oen = _end,				\
+			.call_type = _type,				\
+			.name = #_name,					\
+			.init = _setup,					\
+			.handle = _smch					\
+		}
+
+#elif SMCCC_MAJOR_VERSION == 2
+
+#define DECLARE_RT_SVC(_name, _start, _end, _type, _setup, _smch)	\
+	static const rt_svc_desc_t __svc_desc_ ## _name			\
+		__section("rt_svc_descs") __used = {			\
+			.start_oen = _start,				\
+			.end_oen = _end,				\
+			.is_vendor = 0,					\
+			.name = #_name,					\
+			.init = _setup,					\
+			.handle = _smch,				\
+		};							\
+	CASSERT((_type) == SMC_TYPE_FAST, rt_svc_type_check_ ## _name)
+
+/*
+ * The higher 16 entries of the runtime services are used for the vendor
+ * specific descriptor.
+ */
+#define DECLARE_RT_SVC_VENDOR(_setup, _smch)				\
+	static const rt_svc_desc_t __svc_desc_vendor			\
+		__section("rt_svc_descs") __used = {			\
+			.start_oen = 0,					\
+			.end_oen = 15,					\
+			.is_vendor = 1,					\
+			.name = "vendor_rt_svc",			\
+			.init = _setup,					\
+			.handle = _smch,				\
+		}
+
+#endif /* SMCCC_MAJOR_VERSION */
 
 /*
  * Compile time assertions related to the 'rt_svc_desc' structure to:
@@ -96,6 +144,7 @@
 	assert_rt_svc_desc_handle_offset_mismatch);
 
 
+#if SMCCC_MAJOR_VERSION == 1
 /*
  * This macro combines the call type and the owning entity number corresponding
  * to a runtime service to generate a unique owning entity number. This unique
@@ -112,9 +161,22 @@
  * array to invoke the corresponding runtime service handler during SMC
  * handling.
  */
-#define get_unique_oen_from_smc_fid(fid)		\
-	get_unique_oen(((fid) >> FUNCID_OEN_SHIFT),	\
-			((fid) >> FUNCID_TYPE_SHIFT))
+#define get_unique_oen_from_smc_fid(fid)			\
+	get_unique_oen(GET_SMC_OEN(fid), GET_SMC_TYPE(fid))
+
+#elif SMCCC_MAJOR_VERSION == 2
+
+/*
+ * This macro combines the owning entity number corresponding to a runtime
+ * service with one extra bit for the vendor namespace to generate an index into
+ * the 'rt_svc_descs_indices' array. The entry contains the index of the service
+ * descriptor in the 'rt_svc_descs' array.
+ */
+#define get_rt_desc_idx(oen, is_vendor)				\
+	(((uint32_t)(oen) & FUNCID_OEN_MASK) |			\
+	(((uint32_t)(is_vendor) & 1U) << FUNCID_OEN_WIDTH))
+
+#endif
 
 /*******************************************************************************
  * Function & variable prototypes
diff --git a/include/lib/smccc.h b/include/lib/smccc.h
index b1d4dea..1e7af6a 100644
--- a/include/lib/smccc.h
+++ b/include/lib/smccc.h
@@ -9,83 +9,41 @@
 
 #include <utils_def.h>
 
-/*******************************************************************************
- * Bit definitions inside the function id as per the SMC calling convention
- ******************************************************************************/
-#define FUNCID_TYPE_SHIFT		U(31)
-#define FUNCID_CC_SHIFT			U(30)
-#define FUNCID_OEN_SHIFT		U(24)
-#define FUNCID_NUM_SHIFT		U(0)
+#define SMCCC_VERSION_MAJOR_SHIFT	U(16)
+#define SMCCC_VERSION_MAJOR_MASK	U(0x7FFF)
+#define SMCCC_VERSION_MINOR_SHIFT	U(0)
+#define SMCCC_VERSION_MINOR_MASK	U(0xFFFF)
+#define MAKE_SMCCC_VERSION(_major, _minor) \
+	( (((uint32_t)(_major) & SMCCC_VERSION_MAJOR_MASK) << SMCCC_VERSION_MAJOR_SHIFT) \
+	| (((uint32_t)(_minor) & SMCCC_VERSION_MINOR_MASK) << SMCCC_VERSION_MINOR_SHIFT))
 
-#define FUNCID_TYPE_MASK		U(0x1)
-#define FUNCID_CC_MASK			U(0x1)
-#define FUNCID_OEN_MASK			U(0x3f)
-#define FUNCID_NUM_MASK			U(0xffff)
-
-#define FUNCID_TYPE_WIDTH		U(1)
-#define FUNCID_CC_WIDTH			U(1)
-#define FUNCID_OEN_WIDTH		U(6)
-#define FUNCID_NUM_WIDTH		U(16)
-
-#define GET_SMC_CC(id)			((id >> FUNCID_CC_SHIFT) & \
-					 FUNCID_CC_MASK)
-#define GET_SMC_TYPE(id)		((id >> FUNCID_TYPE_SHIFT) & \
-					 FUNCID_TYPE_MASK)
-
-#define SMC_64				U(1)
-#define SMC_32				U(0)
-#define SMC_OK				U(0)
-#define SMC_UNK				-1
-#define SMC_TYPE_FAST			ULL(1)
-#if !ERROR_DEPRECATED
-#define SMC_TYPE_STD			ULL(0)
+#if SMCCC_MAJOR_VERSION == 1
+# define SMCCC_MINOR_VERSION U(1)
+# include <smccc_v1.h>
+#elif SMCCC_MAJOR_VERSION == 2
+# define SMCCC_MINOR_VERSION U(0)
+# include <smccc_v2.h>
+#else
+# error "Unsupported version of SMCCC."
 #endif
-#define SMC_TYPE_YIELD			U(0)
-#define SMC_PREEMPTED			-2
-/*******************************************************************************
- * Owning entity number definitions inside the function id as per the SMC
- * calling convention
- ******************************************************************************/
-#define OEN_ARM_START			U(0)
-#define OEN_ARM_END			U(0)
-#define OEN_CPU_START			U(1)
-#define OEN_CPU_END			U(1)
-#define OEN_SIP_START			U(2)
-#define OEN_SIP_END			U(2)
-#define OEN_OEM_START			U(3)
-#define OEN_OEM_END			U(3)
-#define OEN_STD_START			U(4)	/* Standard Service Calls */
-#define OEN_STD_END			U(4)
-#define OEN_TAP_START			U(48)	/* Trusted Applications */
-#define OEN_TAP_END			U(49)
-#define OEN_TOS_START			U(50)	/* Trusted OS */
-#define OEN_TOS_END			U(63)
-#define OEN_LIMIT			U(64)
+
+/* Various flags passed to SMC handlers */
+#define SMC_FROM_SECURE		(U(0) << 0)
+#define SMC_FROM_NON_SECURE	(U(1) << 0)
 
 #ifndef __ASSEMBLY__
 
 #include <cassert.h>
 #include <stdint.h>
 
-#define SMCCC_MAJOR_VERSION U(1)
-#define SMCCC_MINOR_VERSION U(1)
-
-#define MAKE_SMCCC_VERSION(_major, _minor) (((_major) << 16) | (_minor))
-
-/* Various flags passed to SMC handlers */
-#define SMC_FROM_SECURE		(U(0) << 0)
-#define SMC_FROM_NON_SECURE	(U(1) << 0)
-
 #define is_caller_non_secure(_f)	(((_f) & SMC_FROM_NON_SECURE) != U(0))
 #define is_caller_secure(_f)		(!is_caller_non_secure(_f))
 
 /* The macro below is used to identify a Standard Service SMC call */
-#define is_std_svc_call(_fid)		((((_fid) >> FUNCID_OEN_SHIFT) & \
-					   FUNCID_OEN_MASK) == OEN_STD_START)
+#define is_std_svc_call(_fid)		(GET_SMC_OEN(_fid) == OEN_STD_START)
 
 /* The macro below is used to identify a Arm Architectural Service SMC call */
-#define is_arm_arch_svc_call(_fid)	((((_fid) >> FUNCID_OEN_SHIFT) & \
-					   FUNCID_OEN_MASK) == OEN_ARM_START)
+#define is_arm_arch_svc_call(_fid)	(GET_SMC_OEN(_fid) == OEN_ARM_START)
 
 /* The macro below is used to identify a valid Fast SMC call */
 #define is_valid_fast_smc(_fid)		((!(((_fid) >> 16) & U(0xff))) && \
diff --git a/include/lib/smccc_v1.h b/include/lib/smccc_v1.h
new file mode 100644
index 0000000..8718d15
--- /dev/null
+++ b/include/lib/smccc_v1.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef SMCCC_V1_H
+#define SMCCC_V1_H
+
+#ifndef __SMCCC_H__
+#error "This file must only be included from smccc.h"
+#endif
+
+/*******************************************************************************
+ * Bit definitions inside the function id as per the SMC calling convention
+ ******************************************************************************/
+#define FUNCID_TYPE_SHIFT		U(31)
+#define FUNCID_TYPE_MASK		U(0x1)
+#define FUNCID_TYPE_WIDTH		U(1)
+
+#define FUNCID_CC_SHIFT			U(30)
+#define FUNCID_CC_MASK			U(0x1)
+#define FUNCID_CC_WIDTH			U(1)
+
+#define FUNCID_OEN_SHIFT		U(24)
+#define FUNCID_OEN_MASK			U(0x3f)
+#define FUNCID_OEN_WIDTH		U(6)
+
+#define FUNCID_NUM_SHIFT		U(0)
+#define FUNCID_NUM_MASK			U(0xffff)
+#define FUNCID_NUM_WIDTH		U(16)
+
+#define GET_SMC_TYPE(id)		(((id) >> FUNCID_TYPE_SHIFT) & \
+					 FUNCID_TYPE_MASK)
+#define GET_SMC_CC(id)			(((id) >> FUNCID_CC_SHIFT) & \
+					 FUNCID_CC_MASK)
+#define GET_SMC_OEN(id)			(((id) >> FUNCID_OEN_SHIFT) & \
+					 FUNCID_OEN_MASK)
+
+/*******************************************************************************
+ * Owning entity number definitions inside the function id as per the SMC
+ * calling convention
+ ******************************************************************************/
+#define OEN_ARM_START			U(0)
+#define OEN_ARM_END			U(0)
+#define OEN_CPU_START			U(1)
+#define OEN_CPU_END			U(1)
+#define OEN_SIP_START			U(2)
+#define OEN_SIP_END			U(2)
+#define OEN_OEM_START			U(3)
+#define OEN_OEM_END			U(3)
+#define OEN_STD_START			U(4)	/* Standard Service Calls */
+#define OEN_STD_END			U(4)
+#define OEN_STD_HYP_START		U(5)	/* Standard Hypervisor Service calls */
+#define OEN_STD_HYP_END			U(5)
+#define OEN_VEN_HYP_START		U(6)	/* Vendor Hypervisor Service calls */
+#define OEN_VEN_HYP_END			U(6)
+#define OEN_TAP_START			U(48)	/* Trusted Applications */
+#define OEN_TAP_END			U(49)
+#define OEN_TOS_START			U(50)	/* Trusted OS */
+#define OEN_TOS_END			U(63)
+#define OEN_LIMIT			U(64)
+
+/* Flags and error codes */
+#define SMC_64				U(1)
+#define SMC_32				U(0)
+
+#define SMC_TYPE_FAST			ULL(1)
+#if !ERROR_DEPRECATED
+#define SMC_TYPE_STD			ULL(0)
+#endif
+#define SMC_TYPE_YIELD			ULL(0)
+
+#define SMC_OK				ULL(0)
+#define SMC_UNK				-1
+#define SMC_PREEMPTED			-2	/* Not defined by the SMCCC */
+
+#endif /* SMCCC_V1_H */
diff --git a/include/lib/smccc_v2.h b/include/lib/smccc_v2.h
new file mode 100644
index 0000000..628c160
--- /dev/null
+++ b/include/lib/smccc_v2.h
@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2016-2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef SMCCC_V2_H
+#define SMCCC_V2_H
+
+#ifndef __SMCCC_H__
+#error "This file must only be included from smccc.h"
+#endif
+
+/*******************************************************************************
+ * Bit definitions inside the function id as per the SMC calling convention
+ ******************************************************************************/
+#define FUNCID_TYPE_SHIFT		U(31)
+#define FUNCID_TYPE_MASK		U(0x1)
+#define FUNCID_TYPE_WIDTH		U(1)
+
+#define FUNCID_CC_SHIFT			U(30)
+#define FUNCID_CC_MASK			U(0x1)
+#define FUNCID_CC_WIDTH			U(1)
+
+#define FUNCID_NAMESPACE_SHIFT		U(28)
+#define FUNCID_NAMESPACE_MASK		U(0x3)
+#define FUNCID_NAMESPACE_WIDTH		U(2)
+
+#define FUNCID_OEN_SHIFT		U(24)
+#define FUNCID_OEN_MASK			U(0xf)
+#define FUNCID_OEN_WIDTH		U(4)
+
+#define FUNCID_NUM_SHIFT		U(0)
+#define FUNCID_NUM_MASK			U(0xffff)
+#define FUNCID_NUM_WIDTH		U(16)
+
+#define GET_SMC_TYPE(id)		(((id) >> FUNCID_TYPE_SHIFT) & \
+					 FUNCID_TYPE_MASK)
+#define GET_SMC_CC(id)			(((id) >> FUNCID_CC_SHIFT) & \
+					 FUNCID_CC_MASK)
+#define GET_SMC_NAMESPACE(id)		(((id) >> FUNCID_NAMESPACE_SHIFT) & \
+					 FUNCID_NAMESPACE_MASK)
+#define GET_SMC_OEN(id)			(((id) >> FUNCID_OEN_SHIFT) & \
+					 FUNCID_OEN_MASK)
+
+/*******************************************************************************
+ * Owning entity number definitions inside the function id as per the SMC
+ * calling convention
+ ******************************************************************************/
+#define OEN_ARM_START			U(0)
+#define OEN_ARM_END			U(0)
+#define OEN_CPU_START			U(1)
+#define OEN_CPU_END			U(1)
+#define OEN_SIP_START			U(2)
+#define OEN_SIP_END			U(2)
+#define OEN_OEM_START			U(3)
+#define OEN_OEM_END			U(3)
+#define OEN_STD_START			U(4)	/* Standard Service Calls */
+#define OEN_STD_END			U(4)
+#define OEN_STD_HYP_START		U(5)	/* Standard Hypervisor Service calls */
+#define OEN_STD_HYP_END			U(5)
+#define OEN_VEN_HYP_START		U(6)	/* Vendor Hypervisor Service calls */
+#define OEN_VEN_HYP_END			U(6)
+#define OEN_LIMIT			U(16)
+
+/*******************************************************************************
+ * Service namespaces as per the SMC Calling Convention v2.X
+ ******************************************************************************/
+#define FUNCID_NAMESPACE_START		U(0)
+#define FUNCID_NAMESPACE_COMPAT		U(0)
+#define FUNCID_NAMESPACE_VENDOR		U(1)
+#define FUNCID_NAMESPACE_SPRT		U(2)
+#define FUNCID_NAMESPACE_SPCI		U(3)
+#define FUNCID_NAMESPACE_LIMIT		U(4)
+
+/* Flags and error codes */
+#define SMC_64				U(1)
+#define SMC_32				U(0)
+
+#define SMC_TYPE_FAST			ULL(1)
+
+#define SMC_OK				ULL(0)
+#define SMC_UNK				-1
+
+#endif /* SMCCC_V2_H */
diff --git a/make_helpers/defaults.mk b/make_helpers/defaults.mk
index 77eb157..9e95cd5 100644
--- a/make_helpers/defaults.mk
+++ b/make_helpers/defaults.mk
@@ -133,6 +133,9 @@
 # platform Makefile is free to override this value.
 SEPARATE_CODE_AND_RODATA	:= 0
 
+# Default to SMCCC Version 1.X
+SMCCC_MAJOR_VERSION		:= 1
+
 # SPD choice
 SPD				:= none