diff --git a/include/services/rmm_core_manifest.h b/include/services/rmm_core_manifest.h
new file mode 100644
index 0000000..2f25858
--- /dev/null
+++ b/include/services/rmm_core_manifest.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef RMM_CORE_MANIFEST_H
+#define RMM_CORE_MANIFEST_H
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include <lib/cassert.h>
+
+#define RMMD_MANIFEST_VERSION_MAJOR		U(0)
+#define RMMD_MANIFEST_VERSION_MINOR		U(1)
+
+/*
+ * Manifest version encoding:
+ *	- Bit[31] RES0
+ *	- Bits [30:16] Major version
+ *	- Bits [15:0] Minor version
+ */
+#define _RMMD_MANIFEST_VERSION(_major, _minor)				\
+	((((_major) & 0x7FFF) << 16) | ((_minor) & 0xFFFF))
+
+#define RMMD_MANIFEST_VERSION _RMMD_MANIFEST_VERSION(			\
+				RMMD_MANIFEST_VERSION_MAJOR,		\
+				RMMD_MANIFEST_VERSION_MINOR)
+
+#define RMMD_GET_MANIFEST_VERSION_MAJOR(_version)			\
+	((_version >> 16) & 0x7FFF)
+
+#define RMMD_GET_MANIFEST_VERSION_MINOR(_version)			\
+	(_version & 0xFFFF)
+
+/* Boot manifest core structure as per v0.1 */
+typedef struct rmm_manifest {
+	uint32_t version;	/* Manifest version */
+	uintptr_t plat_data;	/* Manifest platform data */
+} rmm_manifest_t;
+
+CASSERT(offsetof(rmm_manifest_t, version) == 0,
+				rmm_manifest_t_version_unaligned);
+CASSERT(offsetof(rmm_manifest_t, plat_data) == 8,
+				rmm_manifest_t_plat_data_unaligned);
+
+#endif /* RMM_CORE_MANIFEST_H */
diff --git a/include/services/trp/platform_trp.h b/include/services/trp/platform_trp.h
index b34da85..1c963c8 100644
--- a/include/services/trp/platform_trp.h
+++ b/include/services/trp/platform_trp.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2021-2022, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,9 +7,11 @@
 #ifndef PLATFORM_TRP_H
 #define PLATFORM_TRP_H
 
+#include <services/rmm_core_manifest.h>
+
 /*******************************************************************************
  * Mandatory TRP functions (only if platform contains a TRP)
  ******************************************************************************/
-void trp_early_platform_setup(void);
+void trp_early_platform_setup(rmm_manifest_t *manifest);
 
 #endif /* PLATFORM_TRP_H */
diff --git a/include/services/trp/trp_helpers.h b/include/services/trp/trp_helpers.h
new file mode 100644
index 0000000..8e786e2
--- /dev/null
+++ b/include/services/trp/trp_helpers.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef TRP_HELPERS_H
+#define TRP_HELPERS_H
+
+/* Definitions to help the assembler access the SMC/ERET args structure */
+#define TRP_ARGS_SIZE		TRP_ARGS_END
+#define TRP_ARG0		0x0
+#define TRP_ARG1		0x8
+#define TRP_ARG2		0x10
+#define TRP_ARG3		0x18
+#define TRP_ARG4		0x20
+#define TRP_ARG5		0x28
+#define TRP_ARG6		0x30
+#define TRP_ARG7		0x38
+#define TRP_ARGS_END		0x40
+
+#ifndef __ASSEMBLER__
+
+#include <platform_def.h>
+
+/* Data structure to hold SMC arguments */
+typedef struct trp_args {
+	uint64_t regs[TRP_ARGS_END >> 3];
+} __aligned(CACHE_WRITEBACK_GRANULE) trp_args_t;
+
+trp_args_t *set_smc_args(uint64_t arg0,
+			 uint64_t arg1,
+			 uint64_t arg2,
+			 uint64_t arg3,
+			 uint64_t arg4,
+			 uint64_t arg5,
+			 uint64_t arg6,
+			 uint64_t arg7);
+
+__dead2 void trp_boot_abort(uint64_t err);
+
+#endif /* __ASSEMBLER __ */
+#endif /* TRP_HELPERS_H */