diff --git a/fdts/cot_descriptors.dtsi b/fdts/cot_descriptors.dtsi
new file mode 100644
index 0000000..753d56a
--- /dev/null
+++ b/fdts/cot_descriptors.dtsi
@@ -0,0 +1,318 @@
+/*
+ * Copyright (c) 2020, ARM Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <tools_share/tbbr_oid.h>
+#include <common/tbbr/tbbr_img_def.h>
+
+cot {
+	manifests {
+		compatible = "arm, cert-descs";
+
+		trusted_boot_fw_cert: trusted_boot_fw_cert {
+			root-certificate;
+			image-id =<TRUSTED_BOOT_FW_CERT_ID>;
+			antirollback-counter = <&trusted_nv_counter>;
+
+			tb_fw_hash: tb_fw_hash {
+				oid = TRUSTED_BOOT_FW_HASH_OID;
+			};
+			tb_fw_config_hash: tb_fw_config_hash {
+				oid = TRUSTED_BOOT_FW_CONFIG_HASH_OID;
+			};
+			hw_config_hash: hw_config_hash {
+				oid = HW_CONFIG_HASH_OID;
+			};
+			fw_config_hash: fw_config_hash {
+				oid = FW_CONFIG_HASH_OID;
+			};
+		};
+
+		trusted_key_cert: trusted_key_cert {
+			root-certificate;
+			image-id = <TRUSTED_KEY_CERT_ID>;
+			antirollback-counter = <&trusted_nv_counter>;
+
+			trusted_world_pk: trusted_world_pk {
+				oid = TRUSTED_WORLD_PK_OID;
+			};
+			non_trusted_world_pk: non_trusted_world_pk {
+				oid = NON_TRUSTED_WORLD_PK_OID;
+			};
+		};
+
+		scp_fw_key_cert: scp_fw_key_cert {
+			image-id = <SCP_FW_KEY_CERT_ID>;
+			parent = <&trusted_key_cert>;
+			signing-key = <&trusted_world_pk>;
+			antirollback-counter = <&trusted_nv_counter>;
+
+			scp_fw_content_pk: scp_fw_content_pk {
+				oid = SCP_FW_CONTENT_CERT_PK_OID;
+			};
+		};
+
+		scp_fw_content_cert: scp_fw_content_cert {
+			image-id = <SCP_FW_CONTENT_CERT_ID>;
+			parent = <&scp_fw_key_cert>;
+			signing-key = <&scp_fw_content_pk>;
+			antirollback-counter = <&trusted_nv_counter>;
+
+			scp_fw_hash: scp_fw_hash {
+				oid = SCP_FW_HASH_OID;
+			};
+		};
+
+		soc_fw_key_cert: soc_fw_key_cert {
+			image-id = <SOC_FW_KEY_CERT_ID>;
+			parent = <&trusted_key_cert>;
+			signing-key = <&trusted_world_pk>;
+			antirollback-counter = <&trusted_nv_counter>;
+			soc_fw_content_pk: soc_fw_content_pk {
+				oid = SOC_FW_CONTENT_CERT_PK_OID;
+			};
+		};
+
+		soc_fw_content_cert: soc_fw_content_cert {
+			image-id = <SOC_FW_CONTENT_CERT_ID>;
+			parent = <&soc_fw_key_cert>;
+			signing-key = <&soc_fw_content_pk>;
+			antirollback-counter = <&trusted_nv_counter>;
+
+			soc_fw_hash: soc_fw_hash {
+				oid = SOC_AP_FW_HASH_OID;
+			};
+			soc_fw_config_hash: soc_fw_config_hash {
+				oid = SOC_FW_CONFIG_HASH_OID;
+			};
+		};
+
+		trusted_os_fw_key_cert: trusted_os_fw_key_cert {
+			image-id = <TRUSTED_OS_FW_KEY_CERT_ID>;
+			parent = <&trusted_key_cert>;
+			signing-key = <&trusted_world_pk>;
+			antirollback-counter = <&trusted_nv_counter>;
+
+			tos_fw_content_pk: tos_fw_content_pk {
+				oid = TRUSTED_OS_FW_CONTENT_CERT_PK_OID;
+			};
+		};
+
+		trusted_os_fw_content_cert: trusted_os_fw_content_cert {
+			image-id = <TRUSTED_OS_FW_CONTENT_CERT_ID>;
+			parent = <&trusted_os_fw_key_cert>;
+			signing-key = <&tos_fw_content_pk>;
+			antirollback-counter = <&trusted_nv_counter>;
+
+			tos_fw_hash: tos_fw_hash {
+				oid = TRUSTED_OS_FW_HASH_OID;
+			};
+			tos_fw_extra1_hash: tos_fw_extra1_hash {
+				oid = TRUSTED_OS_FW_EXTRA1_HASH_OID;
+			};
+			tos_fw_extra2_hash: tos_fw_extra2_hash {
+				oid = TRUSTED_OS_FW_EXTRA2_HASH_OID;
+			};
+			tos_fw_config_hash: tos_fw_config_hash {
+				oid = TRUSTED_OS_FW_CONFIG_HASH_OID;
+			};
+		};
+
+		non_trusted_fw_key_cert: non_trusted_fw_key_cert {
+			image-id = <NON_TRUSTED_FW_KEY_CERT_ID>;
+			parent = <&trusted_key_cert>;
+			signing-key = <&non_trusted_world_pk>;
+			antirollback-counter = <&non_trusted_nv_counter>;
+
+			nt_fw_content_pk: nt_fw_content_pk {
+				oid = NON_TRUSTED_FW_CONTENT_CERT_PK_OID;
+			};
+		};
+
+		non_trusted_fw_content_cert: non_trusted_fw_content_cert {
+			image-id = <NON_TRUSTED_FW_CONTENT_CERT_ID>;
+			parent = <&non_trusted_fw_key_cert>;
+			signing-key = <&nt_fw_content_pk>;
+			antirollback-counter = <&non_trusted_nv_counter>;
+
+			nt_world_bl_hash: nt_world_bl_hash {
+				oid = NON_TRUSTED_WORLD_BOOTLOADER_HASH_OID;
+			};
+			nt_fw_config_hash: nt_fw_config_hash {
+				oid = NON_TRUSTED_FW_CONFIG_HASH_OID;
+			};
+		};
+
+#if defined(SPD_spmd)
+		sp_content_cert: sp_content_cert {
+			image-id = <SP_CONTENT_CERT_ID>;
+			parent = <&trusted_key_cert>;
+			signing-key = <&trusted_world_pk>;
+			antirollback-counter = <&trusted_nv_counter>;
+
+			sp_pkg1_hash: sp_pkg1_hash {
+				oid = SP_PKG1_HASH_OID;
+			};
+			sp_pkg2_hash: sp_pkg2_hash {
+				oid = SP_PKG2_HASH_OID;
+			};
+			sp_pkg3_hash: sp_pkg3_hash {
+				oid = SP_PKG3_HASH_OID;
+			};
+			sp_pkg4_hash: sp_pkg4_hash {
+				oid = SP_PKG4_HASH_OID;
+			};
+			sp_pkg5_hash: sp_pkg5_hash {
+				oid = SP_PKG5_HASH_OID;
+			};
+			sp_pkg6_hash: sp_pkg6_hash {
+				oid = SP_PKG6_HASH_OID;
+			};
+			sp_pkg7_hash: sp_pkg7_hash {
+				oid = SP_PKG7_HASH_OID;
+			};
+			sp_pkg8_hash: sp_pkg8_hash {
+				oid = SP_PKG8_HASH_OID;
+			};
+		};
+#endif
+	};
+
+	images {
+		compatible = "arm, img-descs";
+
+		hw_config {
+			image-id = <HW_CONFIG_ID>;
+			parent = <&trusted_boot_fw_cert>;
+			hash = <&hw_config_hash>;
+		};
+
+		tb_fw_config {
+			image-id = <TB_FW_CONFIG_ID>;
+			parent = <&trusted_boot_fw_cert>;
+			hash = <&tb_fw_config_hash>;
+		};
+
+		scp_bl2_image {
+			image-id = <SCP_BL2_IMAGE_ID>;
+			parent = <&scp_fw_content_cert>;
+			hash = <&scp_fw_hash>;
+		};
+
+		bl31_image {
+			image-id = <BL31_IMAGE_ID>;
+			parent = <&soc_fw_content_cert>;
+			hash = <&soc_fw_hash>;
+		};
+
+		soc_fw_config {
+			image-id = <SOC_FW_CONFIG_ID>;
+			parent = <&soc_fw_content_cert>;
+			hash = <&soc_fw_config_hash>;
+		};
+
+		bl32_image {
+			image-id = <BL32_IMAGE_ID>;
+			parent = <&trusted_os_fw_content_cert>;
+			hash = <&tos_fw_hash>;
+		};
+
+		bl32_extra1_image {
+			image-id = <BL32_EXTRA1_IMAGE_ID>;
+			parent = <&trusted_os_fw_content_cert>;
+			hash = <&tos_fw_extra1_hash>;
+		};
+
+		bl32_extra2_image {
+			image-id = <BL32_EXTRA2_IMAGE_ID>;
+			parent = <&trusted_os_fw_content_cert>;
+			hash = <&tos_fw_extra2_hash>;
+		};
+
+		tos_fw_config {
+			image-id = <TOS_FW_CONFIG_ID>;
+			parent = <&trusted_os_fw_content_cert>;
+			hash = <&tos_fw_config_hash>;
+		};
+
+		bl33_image {
+			image-id = <BL33_IMAGE_ID>;
+			parent = <&non_trusted_fw_content_cert>;
+			hash = <&nt_world_bl_hash>;
+		};
+
+		nt_fw_config {
+			image-id = <NT_FW_CONFIG_ID>;
+			parent = <&non_trusted_fw_content_cert>;
+			hash = <&nt_fw_config_hash>;
+		};
+
+#if defined(SPD_spmd)
+		sp_pkg1 {
+			image-id = <SP_CONTENT_CERT_ID + 1>;
+			parent = <&sp_content_cert>;
+			hash = <&sp_pkg1_hash>;
+		};
+
+		sp_pkg2 {
+			image-id = <SP_CONTENT_CERT_ID + 2>;
+			parent = <&sp_content_cert>;
+			hash = <&sp_pkg2_hash>;
+		};
+
+		sp_pkg3 {
+			image-id = <SP_CONTENT_CERT_ID + 3>;
+			parent = <&sp_content_cert>;
+			hash = <&sp_pkg3_hash>;
+		};
+
+		sp_pkg4 {
+			image-id = <SP_CONTENT_CERT_ID + 4>;
+			parent = <&sp_content_cert>;
+			hash = <&sp_pkg4_hash>;
+		};
+
+		sp_pkg5 {
+			image-id = <SP_CONTENT_CERT_ID + 5>;
+			parent = <&sp_content_cert>;
+			hash = <&sp_pkg5_hash>;
+		};
+
+		sp_pkg6 {
+			image-id = <SP_CONTENT_CERT_ID + 6>;
+			parent = <&sp_content_cert>;
+			hash = <&sp_pkg6_hash>;
+		};
+
+		sp_pkg7 {
+			image-id = <SP_CONTENT_CERT_ID + 7>;
+			parent = <&sp_content_cert>;
+			hash = <&sp_pkg7_hash>;
+		};
+
+		sp_pkg8 {
+			image-id = <SP_CONTENT_CERT_ID + 8>;
+			parent = <&sp_content_cert>;
+			hash = <&sp_pkg8_hash>;
+		};
+#endif
+	};
+};
+
+non-volatile-counters {
+	compatible = "arm, non-volatile-counter";
+
+	#address-cells = <1>;
+	#size-cells = <0>;
+
+	counters {
+		trusted_nv_counter: trusted_nv_counter {
+			oid = TRUSTED_FW_NVCOUNTER_OID;
+		};
+		non_trusted_nv_counter: non_trusted_nv_counter {
+			oid = NON_TRUSTED_FW_NVCOUNTER_OID;
+		};
+	};
+};