diff --git a/runtime/include/dev.h b/runtime/include/dev.h
new file mode 100644
index 0000000..61f90ed
--- /dev/null
+++ b/runtime/include/dev.h
@@ -0,0 +1,101 @@
+/*
+ * SPDX-License-Identifier: BSD-3-Clause
+ * SPDX-FileCopyrightText: Copyright TF-RMM Contributors.
+ */
+
+#ifndef DEV_H
+#define DEV_H
+
+#include <app_fw_structures.h>
+#include <arch.h>
+#include <arch_features.h>
+#include <granule.h>
+#include <sizes.h>
+#include <smc-handler.h>
+#include <smc-rmi.h>
+#include <utils_def.h>
+
+/*
+ * Represents the state of communication between an RMM device object and a
+ * device. The device object could be PDEV or VDEV.
+ */
+#define DEV_COMM_ACTIVE			U(0)
+#define DEV_COMM_ERROR			U(1)
+#define DEV_COMM_IDLE			U(2)
+#define DEV_COMM_PENDING		U(3)
+
+/* PCIe device specific details */
+struct pcie_dev {
+	/* Device identifier */
+	uint64_t bdf;
+
+	/* PCIe Segment identifier of the Root Port and endpoint. */
+	uint16_t segment_id;
+
+	/*
+	 * Physical PCIe routing identifier of the Root Port to which the
+	 * endpoint is connected.
+	 */
+	uint16_t root_id;
+
+	/* ECAM base address of the PCIe configuration space */
+	uint64_t ecam_addr;
+
+	/* Certificate slot identifier */
+	uint64_t cert_slot_id;
+
+	/* IDE stream ID */
+	uint64_t ide_sid;
+
+	/*
+	 * Base and top of requester ID range (inclusive). The value is in
+	 * PCI BDF format.
+	 */
+	uint64_t rid_base;
+	uint64_t rid_top;
+
+	/* Device non-coherent address range and its range */
+	struct rmi_address_range
+			ncoh_addr_range[PDEV_PARAM_NCOH_ADDR_RANGE_MAX];
+	uint64_t ncoh_num_addr_range;
+};
+
+/*
+ * PDEV object. Represents a communication channel between the RMM and a
+ * physical device, for example a PCIe device.
+ */
+struct pdev {
+	/* Pointer to this granule */
+	struct granule *g_pdev;
+
+	/* State of this PDEV. RmiPdevState */
+	unsigned long rmi_state;
+
+	/* Flags provided by the Host during PDEV creation. RmiPdevFlags */
+	unsigned long rmi_flags;
+
+	/* Number of VDEVs associated with this PDEV */
+	uint32_t num_vdevs;
+
+	/* Number and addresses of PDEV auxiliary granules */
+	struct granule *g_aux[PDEV_PARAM_AUX_GRANULES_MAX];
+	unsigned int num_aux;
+
+	/*
+	 * Algorithm used to generate device digests. This value is returned to
+	 * Realm as part of RDEV_GET_INFO call
+	 */
+	uint8_t rmi_hash_algo;
+
+	/* Device communiction state */
+	unsigned int dev_comm_state;
+
+	/* The associated device */
+	struct pcie_dev dev;
+
+	/* DA app cfg */
+	struct app_data_cfg da_app_data;
+};
+COMPILER_ASSERT(sizeof(struct pdev) <= GRANULE_SIZE);
+
+#endif /* DEV_H */
diff --git a/runtime/include/smc-handler.h b/runtime/include/smc-handler.h
index c24099b..82508cb 100644
--- a/runtime/include/smc-handler.h
+++ b/runtime/include/smc-handler.h
@@ -106,4 +106,7 @@
 			unsigned long ulevel,
 			struct smc_result *res);
 
+unsigned long smc_pdev_create(unsigned long pdev_ptr,
+			      unsigned long pdev_params_ptr);
+
 #endif /* SMC_HANDLER_H */