diff --git a/drivers/arm/rss/rss_comms_protocol_pointer_access.h b/drivers/arm/rss/rss_comms_protocol_pointer_access.h
new file mode 100644
index 0000000..a4d054b
--- /dev/null
+++ b/drivers/arm/rss/rss_comms_protocol_pointer_access.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ */
+
+#ifndef __RSS_COMMS_PROTOCOL_POINTER_ACCESS_H__
+#define __RSS_COMMS_PROTOCOL_POINTER_ACCESS_H__
+
+#include <cdefs.h>
+
+#include <psa/client.h>
+
+struct __packed rss_pointer_access_msg_t {
+	psa_handle_t handle;
+	uint32_t ctrl_param;
+	uint32_t io_sizes[PSA_MAX_IOVEC];
+	uint64_t host_ptrs[PSA_MAX_IOVEC];
+};
+
+struct __packed rss_pointer_access_reply_t {
+	int32_t return_val;
+	uint32_t out_sizes[PSA_MAX_IOVEC];
+};
+
+psa_status_t rss_protocol_pointer_access_serialize_msg(psa_handle_t handle,
+						       int16_t type,
+						       const psa_invec *in_vec,
+						       uint8_t in_len,
+						       const psa_outvec *out_vec,
+						       uint8_t out_len,
+						       struct rss_pointer_access_msg_t *msg,
+						       size_t *msg_len);
+
+psa_status_t rss_protocol_pointer_access_deserialize_reply(psa_outvec *out_vec,
+							   uint8_t out_len,
+							   psa_status_t *return_val,
+							   const struct rss_pointer_access_reply_t *reply,
+							   size_t reply_size);
+
+#endif /* __RSS_COMMS_PROTOCOL_POINTER_ACCESS_H__ */