diff --git a/services/std_svc/spmd/spmd_private.h b/services/std_svc/spmd/spmd_private.h
index 1fe5065..4cd6a74 100644
--- a/services/std_svc/spmd/spmd_private.h
+++ b/services/std_svc/spmd/spmd_private.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2021, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2019-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -64,6 +64,16 @@
 
 #define SPMD_DIRECT_MSG_ENDPOINT_ID		U(FFA_ENDPOINT_ID_MAX - 1)
 
+/* Define SPMD target function IDs for framework messages to the SPMC */
+#define SPMD_FWK_MSG_BIT			BIT(31)
+#define SPMD_FWK_MSG_PSCI			U(0)
+#define SPMD_FWK_MSG_FFA_VERSION_REQ		U(0x8)
+#define SPMD_FWK_MSG_FFA_VERSION_RESP		U(0x9)
+
+/* Function to build SPMD to SPMC message */
+void spmd_build_spmc_message(gp_regs_t *gpregs, uint8_t target,
+			     unsigned long long message);
+
 /* Functions used to enter/exit SPMC synchronously */
 uint64_t spmd_spm_core_sync_entry(spmd_spm_core_context_t *ctx);
 __dead2 void spmd_spm_core_sync_exit(uint64_t rc);