diff --git a/Makefile b/Makefile
index 65955b2..8adc0d0 100644
--- a/Makefile
+++ b/Makefile
@@ -730,7 +730,17 @@
     endif
 endif
 
-ifneq ($(filter 1,${MEASURED_BOOT} ${TRUSTED_BOARD_BOOT}),)
+ifeq ($(MEASURED_BOOT)-$(TRUSTED_BOARD_BOOT),1-1)
+# Support authentication verification and hash calculation
+    CRYPTO_SUPPORT := 3
+else ifeq ($(DRTM_SUPPORT)-$(TRUSTED_BOARD_BOOT),1-1)
+# Support authentication verification and hash calculation
+    CRYPTO_SUPPORT := 3
+else ifneq ($(filter 1,${MEASURED_BOOT} ${DRTM_SUPPORT}),)
+# Support hash calculation only
+    CRYPTO_SUPPORT := 2
+else ifeq (${TRUSTED_BOARD_BOOT},1)
+# Support authentication verification only
     CRYPTO_SUPPORT := 1
 else
     CRYPTO_SUPPORT := 0
@@ -1041,7 +1051,6 @@
         SPMC_AT_EL3 \
         SPMD_SPM_AT_SEL2 \
         TRUSTED_BOARD_BOOT \
-        CRYPTO_SUPPORT \
         USE_COHERENT_MEM \
         USE_DEBUGFS \
         ARM_IO_IN_DTB \
@@ -1076,6 +1085,7 @@
         CTX_INCLUDE_PAUTH_REGS \
         CTX_INCLUDE_MTE_REGS \
         CTX_INCLUDE_NEVE_REGS \
+        CRYPTO_SUPPORT \
         ENABLE_BRBE_FOR_NS \
         ENABLE_TRBE_FOR_NS \
         ENABLE_BTI \
diff --git a/bl31/bl31.mk b/bl31/bl31.mk
index 3964469..4c93a55 100644
--- a/bl31/bl31.mk
+++ b/bl31/bl31.mk
@@ -147,6 +147,15 @@
 BL31_SOURCES		+=	common/feat_detect.c
 endif
 
+ifeq (${DRTM_SUPPORT},1)
+BL31_SOURCES		+=	services/std_svc/drtm/drtm_main.c		\
+				services/std_svc/drtm/drtm_dma_prot.c		\
+				services/std_svc/drtm/drtm_res_address_map.c	\
+				services/std_svc/drtm/drtm_measurements.c	\
+				services/std_svc/drtm/drtm_remediation.c	\
+				${MBEDTLS_SOURCES}
+endif
+
 BL31_LINKERFILE		:=	bl31/bl31.ld.S
 
 # Flag used to indicate if Crash reporting via console should be included
diff --git a/changelog.yaml b/changelog.yaml
index ad1ac25..f95cdbd 100644
--- a/changelog.yaml
+++ b/changelog.yaml
@@ -589,6 +589,9 @@
           - title: SPM MM
             scope: spm-mm
 
+      - title: DRTM
+        scope: drtm
+
   - title: Libraries
 
     subsections:
@@ -665,6 +668,12 @@
           - title: CryptoCell-713
             scope: cc-713
 
+          - title: Crypto
+            scope: crypto
+
+          - title: mbedTLS
+            scope: mbedtls
+
       - title: Generic Clock
         scope: clk
 
diff --git a/docs/design_documents/drtm_poc.rst b/docs/design_documents/drtm_poc.rst
new file mode 100644
index 0000000..79e1142
--- /dev/null
+++ b/docs/design_documents/drtm_poc.rst
@@ -0,0 +1,132 @@
+DRTM Proof of Concept
+=====================
+
+Dynamic Root of Trust for Measurement (DRTM) begins a new trust environment
+by measuring and executing a protected payload.
+
+Static Root of Trust for Measurement (SRTM)/Measured Boot implementation,
+currently used by TF-A covers all firmwares, from the boot ROM to the normal
+world bootloader. As a whole, they make up the system's TCB. These boot
+measurements allow attesting to what software is running on the system and
+enable enforcing security policies.
+
+As the boot chain grows or firmware becomes dynamically extensible,
+establishing an attestable TCB becomes more challenging. DRTM  provides a
+solution to this problem by allowing measurement chains to be started at
+any time. As these measurements are stored separately from the boot-time
+measurements, they reduce the size of the TCB, which helps reduce the attack
+surface and the risk of untrusted code executing, which could compromise
+the security of the system.
+
+Components
+~~~~~~~~~~
+
+   - **DCE-Preamble**: The DCE Preamble prepares the platform for DRTM by
+     doing any needed configuration, loading the target payload image(DLME),
+     and preparing input parameters needed by DRTM. Finally, it invokes the
+     DL Event to start the dynamic launch.
+
+   - **D-CRTM**: The D-CRTM is the trust anchor (or root of trust) for the
+     DRTM boot sequence and is where the dynamic launch starts. The D-CRTM
+     must be implemented as a trusted agent in the system. The D-CRTM
+     initializes the TPM for DRTM and prepares the environment for the next
+     stage of DRTM, the DCE. The D-CRTM measures the DCE, verifies its
+     signature, and transfers control to it.
+
+   - **DCE**: The DCE executes on an application core. The DCE verifies the
+     system’s state, measures security-critical attributes of the system,
+     prepares the memory region for the target payload, measures the payload,
+     and finally transfers control to the payload.
+
+   - **DLME**: The protected payload is referred to as the Dynamically Launched
+     Measured Environment, or DLME. The DLME begins execution in a safe state,
+     with a single thread of execution, DMA protections, and interrupts
+     disabled. The DCE provides data to the DLME that it can use to verify the
+     configuration of the system.
+
+In this proof of concept, DCE and D-CRTM are implemented in BL31 and
+DCE-Preamble and DLME are implemented in UEFI application. A DL Event is
+triggered as a SMC by DCE-Preamble and handled by D-CRTM, which launches the
+DLME via DCE.
+
+This manual provides instructions to build TF-A code with pre-buit EDK2
+and DRTM UEFI application.
+
+Building the PoC for the Arm FVP platform
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+(1) Use the below command to clone TF-A source code -
+
+.. code:: shell
+
+   $ git clone https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git
+
+(2) There are prebuilt binaries required to execute the DRTM implementation
+    in the `prebuilts-drtm-bins`_.
+    Download EDK2  *FVP_AARCH64_EFI.fd* and UEFI DRTM application *test-disk.img*
+    binary from `prebuilts-drtm-bins`_.
+
+(3) Build the TF-A code using below command
+
+.. code:: shell
+
+   $ make CROSS_COMPILE=aarch64-none-elf- ARM_ROTPK_LOCATION=devel_rsa
+     DEBUG=1 V=1 BL33=</path/to/FVP_AARCH64_EFI.fd> DRTM_SUPPORT=1
+     MBEDTLS_DIR=</path/to/mbedTLS-source> USE_ROMLIB=1 all fip
+
+Running DRTM UEFI application on the Armv8-A AEM FVP
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+To run the DRTM test application along with DRTM implementation in BL31,
+you need an FVP model. Please use the version of FVP_Base_RevC-2xAEMvA model
+advertised in the TF-A documentation.
+
+.. code:: shell
+
+    FVP_Base_RevC-2xAEMvA \
+    --data cluster0.cpu0=</path/to/romlib.bin>@0x03ff2000 \
+    --stat \
+    -C bp.flashloader0.fname=<path/to/fip.bin> \
+    -C bp.secureflashloader.fname=<path/to/bl1.bin> \
+    -C bp.ve_sysregs.exit_on_shutdown=1 \
+    -C bp.virtioblockdevice.image_path=<path/to/test-disk.img> \
+    -C cache_state_modelled=1 \
+    -C cluster0.check_memory_attributes=0 \
+    -C cluster0.cpu0.etm-present=0 \
+    -C cluster0.cpu1.etm-present=0 \
+    -C cluster0.cpu2.etm-present=0 \
+    -C cluster0.cpu3.etm-present=0 \
+    -C cluster0.stage12_tlb_size=1024 \
+    -C cluster1.check_memory_attributes=0 \
+    -C cluster1.cpu0.etm-present=0 \
+    -C cluster1.cpu1.etm-present=0 \
+    -C cluster1.cpu2.etm-present=0 \
+    -C cluster1.cpu3.etm-present=0 \
+    -C cluster1.stage12_tlb_size=1024 \
+    -C pctl.startup=0.0.0.0 \
+    -Q 1000 \
+    "$@"
+
+The bottom of the output from *uart1* should look something like the
+following to indicate that the last SMC to unprotect memory has been fired
+successfully.
+
+.. code-block:: shell
+
+ ...
+
+ INFO:    DRTM service handler: version
+ INFO:    ++ DRTM service handler: TPM features
+ INFO:    ++ DRTM service handler: Min. mem. requirement features
+ INFO:    ++ DRTM service handler: DMA protection features
+ INFO:    ++ DRTM service handler: Boot PE ID features
+ INFO:    ++ DRTM service handler: TCB-hashes features
+ INFO:    DRTM service handler: dynamic launch
+ WARNING: DRTM service handler: close locality is not supported
+ INFO:    DRTM service handler: unprotect mem
+
+--------------
+
+*Copyright (c) 2022, Arm Limited. All rights reserved.*
+
+.. _prebuilts-drtm-bins: https://downloads.trustedfirmware.org/tf-a/drtm
+.. _DRTM-specification: https://developer.arm.com/documentation/den0113/a
diff --git a/docs/design_documents/index.rst b/docs/design_documents/index.rst
index 257a510..765efe6 100644
--- a/docs/design_documents/index.rst
+++ b/docs/design_documents/index.rst
@@ -9,7 +9,8 @@
    cmake_framework
    context_mgmt_rework
    measured_boot_poc
+   drtm_poc
 
 --------------
 
-*Copyright (c) 2020, Arm Limited and Contributors. All rights reserved.*
+*Copyright (c) 2020-2022, Arm Limited and Contributors. All rights reserved.*
diff --git a/docs/getting_started/porting-guide.rst b/docs/getting_started/porting-guide.rst
index 992aca1..c4686f6 100644
--- a/docs/getting_started/porting-guide.rst
+++ b/docs/getting_started/porting-guide.rst
@@ -564,6 +564,21 @@
    doesn't print anything to the console. If ``PLAT_LOG_LEVEL_ASSERT`` isn't
    defined, it defaults to ``LOG_LEVEL``.
 
+If the platform port uses the DRTM feature, the following constants must be
+defined:
+
+-  **#define : PLAT_DRTM_EVENT_LOG_MAX_SIZE**
+
+   Maximum Event Log size used by the platform. Platform can decide the maximum
+   size of the Event Log buffer, depending upon the highest hash algorithm
+   chosen and the number of components selected to measure during the DRTM
+   execution flow.
+
+-  **#define : PLAT_DRTM_MMAP_ENTRIES**
+
+   Number of the MMAP entries used by the DRTM implementation to calculate the
+   size of address map region of the platform.
+
 File : plat_macros.S [mandatory]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -789,6 +804,186 @@
 either could not be updated or the authentication image descriptor indicates
 that it is not allowed to be updated.
 
+Dynamic Root of Trust for Measurement support (in BL31)
+-------------------------------------------------------
+
+The functions mentioned in this section are mandatory, when platform enables
+DRTM_SUPPORT build flag.
+
+Function : plat_get_addr_mmap()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : const mmap_region_t *
+
+This function is used to return the address of the platform *address-map* table,
+which describes the regions of normal memory, memory mapped I/O
+and non-volatile memory.
+
+Function : plat_has_non_host_platforms()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : bool
+
+This function returns *true* if the platform has any trusted devices capable of
+DMA, otherwise returns *false*.
+
+Function : plat_has_unmanaged_dma_peripherals()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : bool
+
+This function returns *true* if platform uses peripherals whose DMA is not
+managed by an SMMU, otherwise returns *false*.
+
+Note -
+If the platform has peripherals that are not managed by the SMMU, then the
+platform should investigate such peripherals to determine whether they can
+be trusted, and such peripherals should be moved under "Non-host platforms"
+if they can be trusted.
+
+Function : plat_get_total_num_smmus()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : unsigned int
+
+This function returns the total number of SMMUs in the platform.
+
+Function : plat_enumerate_smmus()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+::
+
+
+    Argument : void
+    Return   : const uintptr_t *, size_t
+
+This function returns an array of SMMU addresses and the actual number of SMMUs
+reported by the platform.
+
+Function : plat_drtm_get_dma_prot_features()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : const plat_drtm_dma_prot_features_t*
+
+This function returns the address of plat_drtm_dma_prot_features_t structure
+containing the maximum number of protected regions and bitmap with the types
+of DMA protection supported by the platform.
+For more details see section 3.3 Table 6 of `DRTM`_ specification.
+
+Function : plat_drtm_dma_prot_get_max_table_bytes()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : uint64_t
+
+This function returns the maximum size of DMA protected regions table in
+bytes.
+
+Function : plat_drtm_get_tpm_features()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : const plat_drtm_tpm_features_t*
+
+This function returns the address of *plat_drtm_tpm_features_t* structure
+containing PCR usage schema, TPM-based hash, and firmware hash algorithm
+supported by the platform.
+
+Function : plat_drtm_get_min_size_normal_world_dce()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : uint64_t
+
+This function returns the size normal-world DCE of the platform.
+
+Function : plat_drtm_get_imp_def_dlme_region_size()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : uint64_t
+
+This function returns the size of implementation defined DLME region
+of the platform.
+
+Function : plat_drtm_get_tcb_hash_table_size()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : uint64_t
+
+This function returns the size of TCB hash table of the platform.
+
+Function : plat_drtm_get_tcb_hash_features()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : uint64_t
+
+This function returns the Maximum number of TCB hashes recorded by the
+platform.
+For more details see section 3.3 Table 6 of `DRTM`_ specification.
+
+Function : plat_drtm_validate_ns_region()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : uintptr_t, uintptr_t
+    Return   : int
+
+This function validates that given region is within the Non-Secure region
+of DRAM. This function takes a region start address and size an input
+arguments, and returns 0 on success and -1 on failure.
+
+Function : plat_set_drtm_error()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : uint64_t
+    Return   : int
+
+This function writes a 64 bit error code received as input into
+non-volatile storage and returns 0 on success and -1 on failure.
+
+Function : plat_get_drtm_error()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : uint64_t*
+    Return   : int
+
+This function reads a 64 bit error code from the non-volatile storage
+into the received address, and returns 0 on success and -1 on failure.
+
 Common mandatory function modifications
 ---------------------------------------
 
@@ -1097,6 +1292,20 @@
    The address from where it was called is stored in x30 (Link Register).
    The default implementation simply spins.
 
+Function : plat_system_reset()
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+    Argument : void
+    Return   : void
+
+This function is used by the platform to resets the system. It can be used
+in any specific use-case where system needs to be resetted. For example,
+in case of DRTM implementation this function reset the system after
+writing the DRTM error code in the non-volatile storage. This function
+never returns. Failure in reset results in panic.
+
 Function : plat_get_bl_image_load_info()
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
@@ -3225,3 +3434,4 @@
 .. _3.0 (GICv3): http://infocenter.arm.com/help/topic/com.arm.doc.ihi0069b/index.html
 .. _FreeBSD: https://www.freebsd.org
 .. _SCC: http://www.simple-cc.org/
+.. _DRTM: https://developer.arm.com/documentation/den0113/a
diff --git a/docs/glossary.rst b/docs/glossary.rst
index aeeb133..e5d379c 100644
--- a/docs/glossary.rst
+++ b/docs/glossary.rst
@@ -40,6 +40,18 @@
       Common Vulnerabilities and Exposures. A CVE document is commonly used to
       describe a publicly-known security vulnerability.
 
+   DCE
+      DRTM Configuration Environment
+
+   D-CRTM
+      Dynamic Code Root of Trust for Measurement
+
+   DLME
+      Dynamically Launched Measured Environment
+
+   DRTM
+      Dynamic Root of Trust for Measurement
+
    DS-5
       Arm Development Studio 5
 
@@ -186,6 +198,9 @@
    TBBR
       Trusted Board Boot Requirements
 
+   TCB
+      Trusted Compute Base
+
    TEE
       Trusted Execution Environment
 
diff --git a/drivers/auth/crypto_mod.c b/drivers/auth/crypto_mod.c
index eada357..fa1adb4 100644
--- a/drivers/auth/crypto_mod.c
+++ b/drivers/auth/crypto_mod.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2021, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2022, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -46,19 +46,26 @@
 {
 	assert(crypto_lib_desc.name != NULL);
 	assert(crypto_lib_desc.init != NULL);
-#if TRUSTED_BOARD_BOOT
+#if CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY || \
+CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 	assert(crypto_lib_desc.verify_signature != NULL);
 	assert(crypto_lib_desc.verify_hash != NULL);
-#endif /* TRUSTED_BOARD_BOOT */
-#if MEASURED_BOOT
+#endif /* CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY || \
+	  CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
+
+#if CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 	assert(crypto_lib_desc.calc_hash != NULL);
-#endif /* MEASURED_BOOT */
+#endif /* CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+	  CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
 
 	/* Initialize the cryptographic library */
 	crypto_lib_desc.init();
 	INFO("Using crypto library '%s'\n", crypto_lib_desc.name);
 }
 
+#if CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY || \
+CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 /*
  * Function to verify a digital signature
  *
@@ -108,8 +115,11 @@
 	return crypto_lib_desc.verify_hash(data_ptr, data_len,
 					   digest_info_ptr, digest_info_len);
 }
+#endif /* CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY || \
+	  CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
 
-#if MEASURED_BOOT
+#if CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 /*
  * Calculate a hash
  *
@@ -129,7 +139,8 @@
 
 	return crypto_lib_desc.calc_hash(alg, data_ptr, data_len, output);
 }
-#endif	/* MEASURED_BOOT */
+#endif /* CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+	  CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
 
 /*
  * Authenticated decryption of data
diff --git a/drivers/auth/mbedtls/mbedtls_crypto.c b/drivers/auth/mbedtls/mbedtls_crypto.c
index 0901d04..d231179 100644
--- a/drivers/auth/mbedtls/mbedtls_crypto.c
+++ b/drivers/auth/mbedtls/mbedtls_crypto.c
@@ -24,7 +24,8 @@
 
 #define LIB_NAME		"mbed TLS"
 
-#if MEASURED_BOOT
+#if CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 /*
  * CRYPTO_MD_MAX_SIZE value is as per current stronger algorithm available
  * so make sure that mbed TLS MD maximum size must be lesser than this.
@@ -32,7 +33,8 @@
 CASSERT(CRYPTO_MD_MAX_SIZE >= MBEDTLS_MD_MAX_SIZE,
 	assert_mbedtls_md_size_overflow);
 
-#endif /* MEASURED_BOOT */
+#endif /* CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+	  CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
 
 /*
  * AlgorithmIdentifier  ::=  SEQUENCE  {
@@ -60,7 +62,8 @@
 	mbedtls_init();
 }
 
-#if TRUSTED_BOARD_BOOT
+#if CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY || \
+CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 /*
  * Verify a signature.
  *
@@ -219,9 +222,11 @@
 
 	return CRYPTO_SUCCESS;
 }
-#endif /* TRUSTED_BOARD_BOOT */
+#endif /* CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY || \
+	  CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
 
-#if MEASURED_BOOT
+#if CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 /*
  * Map a generic crypto message digest algorithm to the corresponding macro used
  * by Mbed TLS.
@@ -264,7 +269,8 @@
 	 */
 	return mbedtls_md(md_info, data_ptr, data_len, output);
 }
-#endif /* MEASURED_BOOT */
+#endif /* CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+	  CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
 
 #if TF_MBEDTLS_USE_AES_GCM
 /*
@@ -368,7 +374,7 @@
 /*
  * Register crypto library descriptor
  */
-#if MEASURED_BOOT && TRUSTED_BOARD_BOOT
+#if CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 #if TF_MBEDTLS_USE_AES_GCM
 REGISTER_CRYPTO_LIB(LIB_NAME, init, verify_signature, verify_hash, calc_hash,
 		    auth_decrypt);
@@ -376,13 +382,13 @@
 REGISTER_CRYPTO_LIB(LIB_NAME, init, verify_signature, verify_hash, calc_hash,
 		    NULL);
 #endif
-#elif TRUSTED_BOARD_BOOT
+#elif CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY
 #if TF_MBEDTLS_USE_AES_GCM
 REGISTER_CRYPTO_LIB(LIB_NAME, init, verify_signature, verify_hash,
 		    auth_decrypt);
 #else
 REGISTER_CRYPTO_LIB(LIB_NAME, init, verify_signature, verify_hash, NULL);
 #endif
-#elif MEASURED_BOOT
+#elif CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY
 REGISTER_CRYPTO_LIB(LIB_NAME, init, calc_hash);
-#endif /* MEASURED_BOOT && TRUSTED_BOARD_BOOT */
+#endif /* CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
diff --git a/drivers/measured_boot/event_log/event_log.c b/drivers/measured_boot/event_log/event_log.c
index abe469b..d661c35 100644
--- a/drivers/measured_boot/event_log/event_log.c
+++ b/drivers/measured_boot/event_log/event_log.c
@@ -84,23 +84,26 @@
  * Record a measurement as a TCG_PCR_EVENT2 event
  *
  * @param[in] hash		Pointer to hash data of TCG_DIGEST_SIZE bytes
+ * @param[in] event_type	Type of Event, Various Event Types are
+ * 				mentioned in tcg.h header
  * @param[in] metadata_ptr	Pointer to event_log_metadata_t structure
  *
  * There must be room for storing this new event into the event log buffer.
  */
-static void event_log_record(const uint8_t *hash,
-			     const event_log_metadata_t *metadata_ptr)
+void event_log_record(const uint8_t *hash, uint32_t event_type,
+		      const event_log_metadata_t *metadata_ptr)
 {
 	void *ptr = log_ptr;
-	uint32_t name_len;
+	uint32_t name_len = 0U;
 
 	assert(hash != NULL);
 	assert(metadata_ptr != NULL);
-	assert(metadata_ptr->name != NULL);
-	/* event_log_init() must have been called prior to this. */
+	/* event_log_buf_init() must have been called prior to this. */
 	assert(log_ptr != NULL);
 
-	name_len = (uint32_t)strlen(metadata_ptr->name) + 1U;
+	if (metadata_ptr->name != NULL) {
+		name_len = (uint32_t)strlen(metadata_ptr->name) + 1U;
+	}
 
 	/* Check for space in Event Log buffer */
 	assert(((uintptr_t)ptr + (uint32_t)EVENT2_HDR_SIZE + name_len) <
@@ -115,7 +118,7 @@
 	((event2_header_t *)ptr)->pcr_index = metadata_ptr->pcr;
 
 	/* TCG_PCR_EVENT2.EventType */
-	((event2_header_t *)ptr)->event_type = EV_POST_CODE;
+	((event2_header_t *)ptr)->event_type = event_type;
 
 	/* TCG_PCR_EVENT2.Digests.Count */
 	ptr = (uint8_t *)ptr + offsetof(event2_header_t, digests);
@@ -139,14 +142,25 @@
 	((event2_data_t *)ptr)->event_size = name_len;
 
 	/* Copy event data to TCG_PCR_EVENT2.Event */
-	(void)memcpy((void *)(((event2_data_t *)ptr)->event),
-			(const void *)metadata_ptr->name, name_len);
+	if (metadata_ptr->name != NULL) {
+		(void)memcpy((void *)(((event2_data_t *)ptr)->event),
+				(const void *)metadata_ptr->name, name_len);
+	}
 
 	/* End of event data */
 	log_ptr = (uint8_t *)((uintptr_t)ptr +
 			offsetof(event2_data_t, event) + name_len);
 }
 
+void event_log_buf_init(uint8_t *event_log_start, uint8_t *event_log_finish)
+{
+	assert(event_log_start != NULL);
+	assert(event_log_finish > event_log_start);
+
+	log_ptr = event_log_start;
+	log_end = (uintptr_t)event_log_finish;
+}
+
 /*
  * Initialise Event Log global variables, used during the recording
  * of various payload measurements into the Event Log buffer
@@ -158,30 +172,20 @@
  */
 void event_log_init(uint8_t *event_log_start, uint8_t *event_log_finish)
 {
-	assert(event_log_start != NULL);
-	assert(event_log_finish > event_log_start);
-
-	log_ptr = event_log_start;
-	log_end = (uintptr_t)event_log_finish;
+	event_log_buf_init(event_log_start, event_log_finish);
 
 	/* Get pointer to platform's event_log_metadata_t structure */
 	plat_metadata_ptr = plat_event_log_get_metadata();
 	assert(plat_metadata_ptr != NULL);
 }
 
-/*
- * Initialises Event Log by writing Specification ID and
- * Startup Locality events
- */
-void event_log_write_header(void)
+void event_log_write_specid_event(void)
 {
-	const char locality_signature[] = TCG_STARTUP_LOCALITY_SIGNATURE;
 	void *ptr = log_ptr;
 
-	/* event_log_init() must have been called prior to this. */
+	/* event_log_buf_init() must have been called prior to this. */
 	assert(log_ptr != NULL);
-	assert(((uintptr_t)log_ptr + ID_EVENT_SIZE + LOC_EVENT_SIZE) <
-		log_end);
+	assert(((uintptr_t)log_ptr + ID_EVENT_SIZE) < log_end);
 
 	/*
 	 * Add Specification ID Event first
@@ -202,8 +206,23 @@
 	 * No vendor data
 	 */
 	((id_event_struct_data_t *)ptr)->vendor_info_size = 0;
-	ptr = (uint8_t *)((uintptr_t)ptr +
+	log_ptr = (uint8_t *)((uintptr_t)ptr +
 			offsetof(id_event_struct_data_t, vendor_info));
+}
+
+/*
+ * Initialises Event Log by writing Specification ID and
+ * Startup Locality events
+ */
+void event_log_write_header(void)
+{
+	const char locality_signature[] = TCG_STARTUP_LOCALITY_SIGNATURE;
+	void *ptr;
+
+	event_log_write_specid_event();
+
+	ptr = log_ptr;
+	assert(((uintptr_t)log_ptr + LOC_EVENT_SIZE) < log_end);
 
 	/*
 	 * The Startup Locality event should be placed in the log before
@@ -242,6 +261,14 @@
 	log_ptr = (uint8_t *)((uintptr_t)ptr + sizeof(startup_locality_event_t));
 }
 
+int event_log_measure(uintptr_t data_base, uint32_t data_size,
+		      unsigned char hash_data[CRYPTO_MD_MAX_SIZE])
+{
+	/* Calculate hash */
+	return crypto_mod_calc_hash(CRYPTO_MD_ID,
+				    (void *)data_base, data_size, hash_data);
+}
+
 /*
  * Calculate and write hash of image, configuration data, etc.
  * to Event Log.
@@ -267,14 +294,13 @@
 	}
 	assert(metadata_ptr->id != EVLOG_INVALID_ID);
 
-	/* Calculate hash */
-	rc = crypto_mod_calc_hash(CRYPTO_MD_ID,
-				  (void *)data_base, data_size, hash_data);
+	/* Measure the payload with algorithm selected by EventLog driver */
+	rc = event_log_measure(data_base, data_size, hash_data);
 	if (rc != 0) {
 		return rc;
 	}
 
-	event_log_record(hash_data, metadata_ptr);
+	event_log_record(hash_data, EV_POST_CODE, metadata_ptr);
 
 	return 0;
 }
diff --git a/include/arch/aarch64/arch_helpers.h b/include/arch/aarch64/arch_helpers.h
index 2a3eb72..50a5ad4 100644
--- a/include/arch/aarch64/arch_helpers.h
+++ b/include/arch/aarch64/arch_helpers.h
@@ -267,6 +267,8 @@
 DEFINE_SYSREG_RW_FUNCS(mdccsr_el0)
 DEFINE_SYSREG_RW_FUNCS(dbgdtrrx_el0)
 DEFINE_SYSREG_RW_FUNCS(dbgdtrtx_el0)
+DEFINE_SYSREG_RW_FUNCS(sp_el1)
+DEFINE_SYSREG_RW_FUNCS(sp_el2)
 
 DEFINE_SYSOP_FUNC(wfi)
 DEFINE_SYSOP_FUNC(wfe)
diff --git a/include/drivers/auth/crypto_mod.h b/include/drivers/auth/crypto_mod.h
index 73b2b99..3a23df4 100644
--- a/include/drivers/auth/crypto_mod.h
+++ b/include/drivers/auth/crypto_mod.h
@@ -7,6 +7,10 @@
 #ifndef CRYPTO_MOD_H
 #define CRYPTO_MOD_H
 
+#define	CRYPTO_AUTH_VERIFY_ONLY			1
+#define	CRYPTO_HASH_CALC_ONLY			2
+#define	CRYPTO_AUTH_VERIFY_AND_HASH_CALC	3
+
 /* Return values */
 enum crypto_ret_value {
 	CRYPTO_SUCCESS = 0,
@@ -48,6 +52,8 @@
 
 	/* Verify a digital signature. Return one of the
 	 * 'enum crypto_ret_value' options */
+#if CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY || \
+CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 	int (*verify_signature)(void *data_ptr, unsigned int data_len,
 				void *sig_ptr, unsigned int sig_len,
 				void *sig_alg, unsigned int sig_alg_len,
@@ -56,13 +62,17 @@
 	/* Verify a hash. Return one of the 'enum crypto_ret_value' options */
 	int (*verify_hash)(void *data_ptr, unsigned int data_len,
 			   void *digest_info_ptr, unsigned int digest_info_len);
+#endif /* CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY || \
+	  CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
 
-#if MEASURED_BOOT
+#if CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 	/* Calculate a hash. Return hash value */
 	int (*calc_hash)(enum crypto_md_algo md_alg, void *data_ptr,
 			 unsigned int data_len,
 			 unsigned char output[CRYPTO_MD_MAX_SIZE]);
-#endif /* MEASURED_BOOT */
+#endif /* CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+	  CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
 
 	/*
 	 * Authenticated decryption. Return one of the
@@ -84,25 +94,32 @@
 }
 #endif /* CRYPTO_SUPPORT */
 
+#if CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY || \
+CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 int crypto_mod_verify_signature(void *data_ptr, unsigned int data_len,
 				void *sig_ptr, unsigned int sig_len,
 				void *sig_alg_ptr, unsigned int sig_alg_len,
 				void *pk_ptr, unsigned int pk_len);
 int crypto_mod_verify_hash(void *data_ptr, unsigned int data_len,
 			   void *digest_info_ptr, unsigned int digest_info_len);
+#endif /* CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY || \
+	  CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
+
 int crypto_mod_auth_decrypt(enum crypto_dec_algo dec_algo, void *data_ptr,
 			    size_t len, const void *key, unsigned int key_len,
 			    unsigned int key_flags, const void *iv,
 			    unsigned int iv_len, const void *tag,
 			    unsigned int tag_len);
 
-#if MEASURED_BOOT
+#if CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 int crypto_mod_calc_hash(enum crypto_md_algo alg, void *data_ptr,
 			 unsigned int data_len,
 			 unsigned char output[CRYPTO_MD_MAX_SIZE]);
-#endif /* MEASURED_BOOT */
+#endif /* CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY || \
+	  CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
 
-#if MEASURED_BOOT && TRUSTED_BOARD_BOOT
+#if CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC
 /* Macro to register a cryptographic library */
 #define REGISTER_CRYPTO_LIB(_name, _init, _verify_signature, _verify_hash, \
 			    _calc_hash, _auth_decrypt) \
@@ -114,7 +131,7 @@
 		.calc_hash = _calc_hash, \
 		.auth_decrypt = _auth_decrypt \
 	}
-#elif TRUSTED_BOARD_BOOT
+#elif CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_ONLY
 #define REGISTER_CRYPTO_LIB(_name, _init, _verify_signature, _verify_hash, \
 			    _auth_decrypt) \
 	const crypto_lib_desc_t crypto_lib_desc = { \
@@ -124,14 +141,14 @@
 		.verify_hash = _verify_hash, \
 		.auth_decrypt = _auth_decrypt \
 	}
-#elif MEASURED_BOOT
+#elif CRYPTO_SUPPORT == CRYPTO_HASH_CALC_ONLY
 #define REGISTER_CRYPTO_LIB(_name, _init, _calc_hash) \
 	const crypto_lib_desc_t crypto_lib_desc = { \
 		.name = _name, \
 		.init = _init, \
 		.calc_hash = _calc_hash, \
 	}
-#endif	/* MEASURED_BOOT && TRUSTED_BOARD_BOOT */
+#endif /* CRYPTO_SUPPORT == CRYPTO_AUTH_VERIFY_AND_HASH_CALC */
 
 extern const crypto_lib_desc_t crypto_lib_desc;
 
diff --git a/include/drivers/measured_boot/event_log/event_log.h b/include/drivers/measured_boot/event_log/event_log.h
index f4c4fb8..eb0e2b1 100644
--- a/include/drivers/measured_boot/event_log/event_log.h
+++ b/include/drivers/measured_boot/event_log/event_log.h
@@ -11,6 +11,7 @@
 
 #include <common/debug.h>
 #include <common/tbbr/tbbr_img_def.h>
+#include <drivers/auth/crypto_mod.h>
 #include <drivers/measured_boot/event_log/tcg.h>
 
 /*
@@ -109,10 +110,16 @@
 			sizeof(event2_data_t))
 
 /* Functions' declarations */
+void event_log_buf_init(uint8_t *event_log_start, uint8_t *event_log_finish);
 void event_log_init(uint8_t *event_log_start, uint8_t *event_log_finish);
+void event_log_write_specid_event(void);
 void event_log_write_header(void);
 void dump_event_log(uint8_t *log_addr, size_t log_size);
 const event_log_metadata_t *plat_event_log_get_metadata(void);
+int event_log_measure(uintptr_t data_base, uint32_t data_size,
+		      unsigned char hash_data[CRYPTO_MD_MAX_SIZE]);
+void event_log_record(const uint8_t *hash, uint32_t event_type,
+		      const event_log_metadata_t *metadata_ptr);
 int event_log_measure_and_record(uintptr_t data_base, uint32_t data_size,
 				 uint32_t data_id);
 size_t event_log_get_cur_size(uint8_t *event_log_start);
diff --git a/include/drivers/measured_boot/event_log/tcg.h b/include/drivers/measured_boot/event_log/tcg.h
index ab27a08..4ac2c2f 100644
--- a/include/drivers/measured_boot/event_log/tcg.h
+++ b/include/drivers/measured_boot/event_log/tcg.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, Arm Limited. All rights reserved.
+ * Copyright (c) 2020-2022, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -98,7 +98,12 @@
 	/* 8-15: Defined for use by the Static OS */
 	PCR_8,
 	/* Debug */
-	PCR_16 = 16
+	PCR_16 = 16,
+
+	/* D-CRTM-measurements by DRTM implementation */
+	PCR_17 = 17,
+	/* DCE measurements by DRTM implementation */
+	PCR_18 = 18
 };
 
 #pragma pack(push, 1)
diff --git a/include/lib/smccc.h b/include/lib/smccc.h
index 1a39f24..9940ea9 100644
--- a/include/lib/smccc.h
+++ b/include/lib/smccc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016-2021, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -41,6 +41,8 @@
 #define FUNCID_NUM_MASK			U(0xffff)
 #define FUNCID_NUM_WIDTH		U(16)
 
+#define FUNCID_MASK			U(0xffffffff)
+
 #define GET_SMC_NUM(id)			(((id) >> FUNCID_NUM_SHIFT) & \
 					 FUNCID_NUM_MASK)
 #define GET_SMC_TYPE(id)		(((id) >> FUNCID_TYPE_SHIFT) & \
diff --git a/include/lib/xlat_tables/xlat_tables_compat.h b/include/lib/xlat_tables/xlat_tables_compat.h
index 90768db..5f28195 100644
--- a/include/lib/xlat_tables/xlat_tables_compat.h
+++ b/include/lib/xlat_tables/xlat_tables_compat.h
@@ -1,11 +1,16 @@
 /*
- * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2022, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
+#ifndef XLAT_TABLES_COMPAT_H
+#define XLAT_TABLES_COMPAT_H
+
 #if XLAT_TABLES_LIB_V2
 #include <lib/xlat_tables/xlat_tables_v2.h>
 #else
 #include <lib/xlat_tables/xlat_tables.h>
 #endif
+
+#endif /* XLAT_TABLES_COMPAT_H */
diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index d060332..6c0d91d 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -297,6 +297,7 @@
 void plat_arm_program_trusted_mailbox(uintptr_t address);
 bool plat_arm_bl1_fwu_needed(void);
 __dead2 void plat_arm_error_handler(int err);
+__dead2 void plat_arm_system_reset(void);
 
 /*
  * Optional functions in ARM standard platforms
diff --git a/include/plat/common/plat_drtm.h b/include/plat/common/plat_drtm.h
new file mode 100644
index 0000000..e96e719
--- /dev/null
+++ b/include/plat/common/plat_drtm.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef PLAT_DRTM_H
+#define PLAT_DRTM_H
+
+#include <stdint.h>
+#include <lib/xlat_tables/xlat_tables_compat.h>
+
+typedef struct {
+	uint8_t max_num_mem_prot_regions;
+	uint8_t dma_protection_support;
+} plat_drtm_dma_prot_features_t;
+
+typedef struct {
+	bool tpm_based_hash_support;
+	uint32_t firmware_hash_algorithm;
+} plat_drtm_tpm_features_t;
+
+typedef struct {
+	uint64_t region_address;
+	uint64_t region_size_type;
+} __attribute__((packed)) drtm_mem_region_t;
+
+/*
+ * Memory region descriptor table structure as per DRTM beta0 section 3.13
+ * Table 11 MEMORY_REGION_DESCRIPTOR_TABLE
+ */
+typedef struct {
+	uint16_t revision;
+	uint16_t reserved;
+	uint32_t num_regions;
+	drtm_mem_region_t region[];
+} __attribute__((packed)) drtm_memory_region_descriptor_table_t;
+
+/* platform specific address map functions */
+const mmap_region_t *plat_get_addr_mmap(void);
+
+/* platform-specific DMA protection functions */
+bool plat_has_non_host_platforms(void);
+bool plat_has_unmanaged_dma_peripherals(void);
+unsigned int plat_get_total_smmus(void);
+void plat_enumerate_smmus(const uintptr_t **smmus_out,
+			  size_t *smmu_count_out);
+const plat_drtm_dma_prot_features_t *plat_drtm_get_dma_prot_features(void);
+uint64_t plat_drtm_dma_prot_get_max_table_bytes(void);
+
+/* platform-specific TPM functions */
+const plat_drtm_tpm_features_t *plat_drtm_get_tpm_features(void);
+
+/*
+ * TODO: Implement these functions as per the platform use case,
+ * as of now none of the platform uses these functions
+ */
+uint64_t plat_drtm_get_min_size_normal_world_dce(void);
+uint64_t plat_drtm_get_tcb_hash_table_size(void);
+uint64_t plat_drtm_get_imp_def_dlme_region_size(void);
+uint64_t plat_drtm_get_tcb_hash_features(void);
+
+/* DRTM error handling functions */
+int plat_set_drtm_error(uint64_t error_code);
+int plat_get_drtm_error(uint64_t *error_code);
+
+/*
+ * Platform-specific function to ensure passed region lies within
+ * Non-Secure region of DRAM
+ */
+int plat_drtm_validate_ns_region(uintptr_t region_start,
+				 size_t region_size);
+
+#endif /* PLAT_DRTM_H */
diff --git a/include/plat/common/platform.h b/include/plat/common/platform.h
index da74624..c90441c 100644
--- a/include/plat/common/platform.h
+++ b/include/plat/common/platform.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2022, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -20,6 +20,9 @@
 #include "plat_trng.h"
 #endif
 #include <drivers/fwu/fwu_metadata.h>
+#if DRTM_SUPPORT
+#include "plat_drtm.h"
+#endif /* DRTM_SUPPORT */
 
 /*******************************************************************************
  * Forward declarations
@@ -125,6 +128,7 @@
 void plat_crash_console_flush(void);
 void plat_error_handler(int err) __dead2;
 void plat_panic_handler(void) __dead2;
+void plat_system_reset(void) __dead2;
 const char *plat_log_get_prefix(unsigned int log_level);
 void bl2_plat_preload_setup(void);
 int plat_try_next_boot_source(void);
diff --git a/include/services/drtm_svc.h b/include/services/drtm_svc.h
new file mode 100644
index 0000000..69b314f
--- /dev/null
+++ b/include/services/drtm_svc.h
@@ -0,0 +1,241 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ * DRTM service
+ *
+ * Authors:
+ *	Lucian Paul-Trifu <lucian.paultrifu@gmail.com>
+ *	Brian Nezvadovitz <brinez@microsoft.com> 2021-02-01
+ *
+ */
+
+#ifndef ARM_DRTM_SVC_H
+#define ARM_DRTM_SVC_H
+
+/*
+ * SMC function IDs for DRTM Service
+ * Upper word bits set: Fast call, SMC64, Standard Secure Svc. Call (OEN = 4)
+ */
+#define DRTM_FID(func_num)				\
+	((SMC_TYPE_FAST << FUNCID_TYPE_SHIFT) |		\
+	(SMC_64 << FUNCID_CC_SHIFT) |			\
+	(OEN_STD_START << FUNCID_OEN_SHIFT) |		\
+	((func_num) << FUNCID_NUM_SHIFT))
+
+#define DRTM_FNUM_SVC_VERSION		U(0x110)
+#define DRTM_FNUM_SVC_FEATURES		U(0x111)
+#define DRTM_FNUM_SVC_UNPROTECT_MEM	U(0x113)
+#define DRTM_FNUM_SVC_DYNAMIC_LAUNCH	U(0x114)
+#define DRTM_FNUM_SVC_CLOSE_LOCALITY	U(0x115)
+#define DRTM_FNUM_SVC_GET_ERROR		U(0x116)
+#define DRTM_FNUM_SVC_SET_ERROR		U(0x117)
+#define DRTM_FNUM_SVC_SET_TCB_HASH	U(0x118)
+#define DRTM_FNUM_SVC_LOCK_TCB_HASH	U(0x119)
+
+#define ARM_DRTM_SVC_VERSION		DRTM_FID(DRTM_FNUM_SVC_VERSION)
+#define ARM_DRTM_SVC_FEATURES		DRTM_FID(DRTM_FNUM_SVC_FEATURES)
+#define ARM_DRTM_SVC_UNPROTECT_MEM	DRTM_FID(DRTM_FNUM_SVC_UNPROTECT_MEM)
+#define ARM_DRTM_SVC_DYNAMIC_LAUNCH	DRTM_FID(DRTM_FNUM_SVC_DYNAMIC_LAUNCH)
+#define ARM_DRTM_SVC_CLOSE_LOCALITY	DRTM_FID(DRTM_FNUM_SVC_CLOSE_LOCALITY)
+#define ARM_DRTM_SVC_GET_ERROR		DRTM_FID(DRTM_FNUM_SVC_GET_ERROR)
+#define ARM_DRTM_SVC_SET_ERROR		DRTM_FID(DRTM_FNUM_SVC_SET_ERROR)
+#define ARM_DRTM_SVC_SET_TCB_HASH	DRTM_FID(DRTM_FNUM_SVC_SET_TCB_HASH)
+#define ARM_DRTM_SVC_LOCK_TCB_HASH	DRTM_FID(DRTM_FNUM_SVC_LOCK_TCB_HASH)
+
+#define ARM_DRTM_FEATURES_TPM		U(0x1)
+#define ARM_DRTM_FEATURES_MEM_REQ	U(0x2)
+#define ARM_DRTM_FEATURES_DMA_PROT	U(0x3)
+#define ARM_DRTM_FEATURES_BOOT_PE_ID	U(0x4)
+#define ARM_DRTM_FEATURES_TCB_HASHES	U(0x5)
+
+#define is_drtm_fid(_fid) \
+	(((_fid) >= ARM_DRTM_SVC_VERSION) && ((_fid) <= ARM_DRTM_SVC_LOCK_TCB_HASH))
+
+/* ARM DRTM Service Calls version numbers */
+#define ARM_DRTM_VERSION_MAJOR		U(0)
+#define ARM_DRTM_VERSION_MAJOR_SHIFT	16
+#define ARM_DRTM_VERSION_MAJOR_MASK	U(0x7FFF)
+#define ARM_DRTM_VERSION_MINOR		U(1)
+#define ARM_DRTM_VERSION_MINOR_SHIFT	0
+#define ARM_DRTM_VERSION_MINOR_MASK	U(0xFFFF)
+
+#define ARM_DRTM_VERSION						\
+	((((ARM_DRTM_VERSION_MAJOR) & ARM_DRTM_VERSION_MAJOR_MASK) <<	\
+	ARM_DRTM_VERSION_MAJOR_SHIFT)					\
+	| (((ARM_DRTM_VERSION_MINOR) & ARM_DRTM_VERSION_MINOR_MASK) <<	\
+	ARM_DRTM_VERSION_MINOR_SHIFT))
+
+#define ARM_DRTM_FUNC_SHIFT	U(63)
+#define ARM_DRTM_FUNC_MASK	ULL(0x1)
+#define ARM_DRTM_FUNC_ID	U(0x0)
+#define ARM_DRTM_FEAT_ID	U(0x1)
+#define ARM_DRTM_FEAT_ID_MASK	ULL(0xff)
+
+/*
+ * Definitions for DRTM features as per DRTM beta0 section 3.3,
+ * Table 6 DRTM_FEATURES
+ */
+#define ARM_DRTM_TPM_FEATURES_PCR_SCHEMA_SHIFT		U(33)
+#define ARM_DRTM_TPM_FEATURES_PCR_SCHEMA_MASK		ULL(0xF)
+#define ARM_DRTM_TPM_FEATURES_PCR_SCHEMA_DEFAULT	ULL(0x1)
+
+#define ARM_DRTM_TPM_FEATURES_TPM_HASH_SHIFT		U(32)
+#define ARM_DRTM_TPM_FEATURES_TPM_HASH_MASK		ULL(0x1)
+#define ARM_DRTM_TPM_FEATURES_TPM_HASH_NOT_SUPPORTED	ULL(0x0)
+#define ARM_DRTM_TPM_FEATURES_TPM_HASH_SUPPORTED	ULL(0x1)
+
+#define ARM_DRTM_TPM_FEATURES_FW_HASH_SHIFT		U(0)
+#define ARM_DRTM_TPM_FEATURES_FW_HASH_MASK		ULL(0xFFFFFFFF)
+#define ARM_DRTM_TPM_FEATURES_FW_HASH_SHA256		ULL(0xB)
+#define ARM_DRTM_TPM_FEATURES_FW_HASH_SHA384		ULL(0xC)
+#define ARM_DRTM_TPM_FEATURES_FW_HASH_SHA512		ULL(0xD)
+
+#define ARM_DRTM_MIN_MEM_REQ_DCE_SIZE_SHIFT		U(32)
+#define ARM_DRTM_MIN_MEM_REQ_DCE_SIZE_MASK		ULL(0xFFFFFFFF)
+
+#define ARM_DRTM_MIN_MEM_REQ_MIN_DLME_DATA_SIZE_SHIFT	U(0)
+#define ARM_DRTM_MIN_MEM_REQ_MIN_DLME_DATA_SIZE_MASK	ULL(0xFFFFFFFF)
+
+#define ARM_DRTM_DMA_PROT_FEATURES_MAX_REGIONS_SHIFT	U(8)
+#define ARM_DRTM_DMA_PROT_FEATURES_MAX_REGIONS_MASK	ULL(0xF)
+
+#define ARM_DRTM_DMA_PROT_FEATURES_DMA_SUPPORT_SHIFT	U(0)
+#define ARM_DRTM_DMA_PROT_FEATURES_DMA_SUPPORT_MASK	ULL(0xFF)
+#define ARM_DRTM_DMA_PROT_FEATURES_DMA_SUPPORT_COMPLETE	ULL(0x1)
+#define ARM_DRTM_DMA_PROT_FEATURES_DMA_SUPPORT_REGION	ULL(0x2)
+
+#define ARM_DRTM_TCB_HASH_FEATURES_MAX_NUM_HASHES_SHIFT	U(0)
+#define ARM_DRTM_TCB_HASH_FEATURES_MAX_NUM_HASHES_MASK	ULL(0xFF)
+
+#define ARM_DRTM_TPM_FEATURES_SET_PCR_SCHEMA(reg, val)			\
+	do {								\
+		reg = (((reg) & ~(ARM_DRTM_TPM_FEATURES_PCR_SCHEMA_MASK \
+		<< ARM_DRTM_TPM_FEATURES_PCR_SCHEMA_SHIFT)) | (((val) & \
+		ARM_DRTM_TPM_FEATURES_PCR_SCHEMA_MASK) <<		\
+		ARM_DRTM_TPM_FEATURES_PCR_SCHEMA_SHIFT));		\
+	} while (false)
+
+#define ARM_DRTM_TPM_FEATURES_SET_TPM_HASH(reg, val)			\
+	do {								\
+		reg = (((reg) & ~(ARM_DRTM_TPM_FEATURES_TPM_HASH_MASK	\
+		<< ARM_DRTM_TPM_FEATURES_TPM_HASH_SHIFT)) | (((val) &	\
+		ARM_DRTM_TPM_FEATURES_TPM_HASH_MASK) <<			\
+		ARM_DRTM_TPM_FEATURES_TPM_HASH_SHIFT));			\
+	} while (false)
+
+#define ARM_DRTM_TPM_FEATURES_SET_FW_HASH(reg, val)			\
+	do {								\
+		reg = (((reg) & ~(ARM_DRTM_TPM_FEATURES_FW_HASH_MASK	\
+		<< ARM_DRTM_TPM_FEATURES_FW_HASH_SHIFT)) | (((val) &	\
+		ARM_DRTM_TPM_FEATURES_FW_HASH_MASK) <<			\
+		ARM_DRTM_TPM_FEATURES_FW_HASH_SHIFT));			\
+	} while (false)
+
+#define ARM_DRTM_MIN_MEM_REQ_SET_DCE_SIZE(reg, val)			\
+	do {								\
+		reg = (((reg) & ~(ARM_DRTM_MIN_MEM_REQ_DCE_SIZE_MASK	\
+		<< ARM_DRTM_MIN_MEM_REQ_DCE_SIZE_SHIFT)) | (((val) &	\
+		ARM_DRTM_MIN_MEM_REQ_DCE_SIZE_MASK) <<			\
+		ARM_DRTM_MIN_MEM_REQ_DCE_SIZE_SHIFT));			\
+	} while (false)
+
+#define ARM_DRTM_MIN_MEM_REQ_SET_MIN_DLME_DATA_SIZE(reg, val)		\
+	do {								\
+		reg = (((reg) &						\
+		~(ARM_DRTM_MIN_MEM_REQ_MIN_DLME_DATA_SIZE_MASK <<	\
+		ARM_DRTM_MIN_MEM_REQ_MIN_DLME_DATA_SIZE_SHIFT)) |	\
+		(((val) & ARM_DRTM_MIN_MEM_REQ_MIN_DLME_DATA_SIZE_MASK) \
+		<< ARM_DRTM_MIN_MEM_REQ_MIN_DLME_DATA_SIZE_SHIFT));	\
+	} while (false)
+
+#define ARM_DRTM_DMA_PROT_FEATURES_SET_MAX_REGIONS(reg, val)		\
+	do {								\
+		reg = (((reg) &						\
+		~(ARM_DRTM_DMA_PROT_FEATURES_MAX_REGIONS_MASK <<	\
+		ARM_DRTM_DMA_PROT_FEATURES_MAX_REGIONS_SHIFT)) |	\
+		(((val) & ARM_DRTM_DMA_PROT_FEATURES_MAX_REGIONS_MASK)	\
+		<< ARM_DRTM_DMA_PROT_FEATURES_MAX_REGIONS_SHIFT));	\
+	} while (false)
+
+#define ARM_DRTM_DMA_PROT_FEATURES_SET_DMA_SUPPORT(reg, val) \
+	do {								\
+		reg = (((reg) &						\
+		~(ARM_DRTM_DMA_PROT_FEATURES_DMA_SUPPORT_MASK <<	\
+		ARM_DRTM_DMA_PROT_FEATURES_DMA_SUPPORT_SHIFT)) |	\
+		(((val) & ARM_DRTM_DMA_PROT_FEATURES_DMA_SUPPORT_MASK)	\
+		<< ARM_DRTM_DMA_PROT_FEATURES_DMA_SUPPORT_SHIFT));	\
+	} while (false)
+
+#define ARM_DRTM_TCB_HASH_FEATURES_SET_MAX_NUM_HASHES(reg, val)		\
+	do {								\
+		reg = (((reg) &						\
+		~(ARM_DRTM_TCB_HASH_FEATURES_MAX_NUM_HASHES_MASK <<	\
+		ARM_DRTM_TCB_HASH_FEATURES_MAX_NUM_HASHES_SHIFT)) |	\
+		(((val) &						\
+		ARM_DRTM_TCB_HASH_FEATURES_MAX_NUM_HASHES_MASK) <<	\
+		ARM_DRTM_TCB_HASH_FEATURES_MAX_NUM_HASHES_SHIFT));	\
+	} while (false)
+
+/* Definitions for DRTM address map */
+#define ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_SHIFT	U(55)
+#define ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_MASK	ULL(0x3)
+#define ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_NC	ULL(0)
+#define ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_WC	ULL(1)
+#define ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_WT	ULL(2)
+#define ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_WB	ULL(3)
+
+#define ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_SHIFT	U(52)
+#define ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_MASK	ULL(0x7)
+#define ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_NORMAL	ULL(0)
+#define ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_NCAR	ULL(1)
+#define ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_DEVICE	ULL(2)
+#define ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_NV	ULL(3)
+#define ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_RSVD	ULL(4)
+
+#define ARM_DRTM_REGION_SIZE_TYPE_4K_PAGE_NUM_SHIFT	U(0)
+#define ARM_DRTM_REGION_SIZE_TYPE_4K_PAGE_NUM_MASK	ULL(0xFFFFFFFFFFFFF)
+
+#define ARM_DRTM_REGION_SIZE_TYPE_SET_CACHEABILITY(reg, val)		\
+	do {								\
+		reg = (((reg) &						\
+		~(ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_MASK << 	\
+		ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_SHIFT)) |	\
+		(((val) &						\
+		ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_MASK) <<		\
+		ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_SHIFT));		\
+	} while (false)
+
+#define ARM_DRTM_REGION_SIZE_TYPE_SET_REGION_TYPE(reg, val)		\
+	do {								\
+		reg = (((reg) &						\
+		~(ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_MASK <<		\
+		ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_SHIFT)) |		\
+		(((val) & ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_MASK)	\
+		<< ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_SHIFT));	\
+	} while (false)
+
+#define ARM_DRTM_REGION_SIZE_TYPE_SET_4K_PAGE_NUM(reg, val)		\
+	do {								\
+		reg = (((reg) &						\
+		~(ARM_DRTM_REGION_SIZE_TYPE_4K_PAGE_NUM_MASK <<		\
+		ARM_DRTM_REGION_SIZE_TYPE_4K_PAGE_NUM_SHIFT)) |		\
+		(((val) & ARM_DRTM_REGION_SIZE_TYPE_4K_PAGE_NUM_MASK)	\
+		<< ARM_DRTM_REGION_SIZE_TYPE_4K_PAGE_NUM_SHIFT));	\
+	} while (false)
+
+/* Initialization routine for the DRTM service */
+int drtm_setup(void);
+
+/* Handler to be called to handle DRTM SMC calls */
+uint64_t drtm_smc_handler(uint32_t smc_fid,
+			  uint64_t x1,
+			  uint64_t x2,
+			  uint64_t x3,
+			  uint64_t x4,
+			  void *cookie,
+			  void *handle,
+			  uint64_t flags);
+
+#endif /* ARM_DRTM_SVC_H */
diff --git a/include/services/sdei.h b/include/services/sdei.h
index 063ed6f..c12a182 100644
--- a/include/services/sdei.h
+++ b/include/services/sdei.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2022, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -137,4 +137,7 @@
 /* Public API to dispatch an event to Normal world */
 int sdei_dispatch_event(int ev_num);
 
+/* Public API to check how many SDEI events are registered. */
+int sdei_get_registered_event_count(void);
+
 #endif /* SDEI_H */
diff --git a/plat/arm/board/fvp/fvp_drtm_addr.c b/plat/arm/board/fvp/fvp_drtm_addr.c
new file mode 100644
index 0000000..eeaa342
--- /dev/null
+++ b/plat/arm/board/fvp/fvp_drtm_addr.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ */
+
+#include <stdint.h>
+
+#include <plat/common/platform.h>
+#include <platform_def.h>
+
+/*******************************************************************************
+ * Check passed region is within Non-Secure region of DRAM
+ ******************************************************************************/
+int plat_drtm_validate_ns_region(uintptr_t region_start,
+				 size_t region_size)
+{
+	uintptr_t region_end = region_start + region_size - 1;
+
+	if (region_start >= region_end) {
+		return -1;
+	} else if ((region_start >= ARM_NS_DRAM1_BASE) &&
+		   (region_start < (ARM_NS_DRAM1_BASE + ARM_NS_DRAM1_SIZE)) &&
+		   (region_end >= ARM_NS_DRAM1_BASE) &&
+		   (region_end < (ARM_NS_DRAM1_BASE + ARM_NS_DRAM1_SIZE))) {
+		return 0;
+	} else if ((region_start >= ARM_DRAM2_BASE) &&
+		   (region_start < (ARM_DRAM2_BASE + ARM_DRAM2_SIZE)) &&
+		   (region_end >= ARM_DRAM2_BASE) &&
+		   (region_end < (ARM_DRAM2_BASE + ARM_DRAM2_SIZE))) {
+		return 0;
+	}
+
+	return -1;
+}
diff --git a/plat/arm/board/fvp/fvp_drtm_dma_prot.c b/plat/arm/board/fvp/fvp_drtm_dma_prot.c
new file mode 100644
index 0000000..38ff7fe
--- /dev/null
+++ b/plat/arm/board/fvp/fvp_drtm_dma_prot.c
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdbool.h>
+#include <stddef.h>
+
+#include <drivers/arm/smmu_v3.h>
+#include <lib/utils_def.h>
+#include <plat/arm/common/arm_config.h>
+#include <plat/common/platform.h>
+
+#include <platform_def.h>
+
+/**
+ * Array mentioning number of SMMUs supported by FVP
+ */
+static const uintptr_t fvp_smmus[] = {
+	PLAT_FVP_SMMUV3_BASE,
+};
+
+bool plat_has_non_host_platforms(void)
+{
+	/* FVP base platforms typically have GPU, as per FVP Reference guide */
+	return true;
+}
+
+bool plat_has_unmanaged_dma_peripherals(void)
+{
+	/*
+	 * FVP Reference guide does not show devices that are described as
+	 * DMA-capable but not managed by an SMMU in the FVP documentation.
+	 * However, the SMMU seems to have only been introduced in the RevC
+	 * revision.
+	 */
+	return (arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) == 0;
+}
+
+unsigned int plat_get_total_smmus(void)
+{
+	if ((arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) != 0U) {
+		return ARRAY_SIZE(fvp_smmus);
+	} else {
+		return 0;
+	}
+}
+
+void plat_enumerate_smmus(const uintptr_t **smmus_out,
+			  size_t *smmu_count_out)
+{
+	if ((arm_config.flags & ARM_CONFIG_FVP_HAS_SMMUV3) != 0U) {
+		*smmus_out = fvp_smmus;
+		*smmu_count_out = ARRAY_SIZE(fvp_smmus);
+	} else {
+		*smmus_out = NULL;
+		*smmu_count_out = 0;
+	}
+}
+
+/* DRTM DMA Protection Features */
+static const plat_drtm_dma_prot_features_t dma_prot_features = {
+	.max_num_mem_prot_regions = 0, /* No protection regions are present */
+	.dma_protection_support = 0x1 /* Complete DMA protection only */
+};
+
+const plat_drtm_dma_prot_features_t *plat_drtm_get_dma_prot_features(void)
+{
+	return &dma_prot_features;
+}
+
+uint64_t plat_drtm_dma_prot_get_max_table_bytes(void)
+{
+	return 0U;
+}
diff --git a/plat/arm/board/fvp/fvp_drtm_err.c b/plat/arm/board/fvp/fvp_drtm_err.c
new file mode 100644
index 0000000..95259fa
--- /dev/null
+++ b/plat/arm/board/fvp/fvp_drtm_err.c
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdint.h>
+
+#include <plat/common/platform.h>
+
+int plat_set_drtm_error(uint64_t error_code)
+{
+	/* TODO: Set DRTM error in NV-storage */
+	return 0;
+}
+
+int plat_get_drtm_error(uint64_t *error_code)
+{
+	/* TODO: Get DRTM error from NV-storage */
+	*error_code = 0;
+	return 0;
+}
diff --git a/plat/arm/board/fvp/fvp_drtm_measurement.c b/plat/arm/board/fvp/fvp_drtm_measurement.c
new file mode 100644
index 0000000..4fbedd8
--- /dev/null
+++ b/plat/arm/board/fvp/fvp_drtm_measurement.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#include <drivers/measured_boot/event_log/event_log.h>
+#include <plat/common/platform.h>
+
+#include <platform_def.h>
+
+/* DRTM TPM Features */
+static const plat_drtm_tpm_features_t tpm_features = {
+	/* No TPM-based hashing supported. */
+	.tpm_based_hash_support = false,
+
+	/* Set to decided algorithm by Event Log driver */
+	.firmware_hash_algorithm = TPM_ALG_ID
+
+};
+
+const plat_drtm_tpm_features_t *plat_drtm_get_tpm_features(void)
+{
+	return &tpm_features;
+}
diff --git a/plat/arm/board/fvp/fvp_drtm_stub.c b/plat/arm/board/fvp/fvp_drtm_stub.c
new file mode 100644
index 0000000..e2bc516
--- /dev/null
+++ b/plat/arm/board/fvp/fvp_drtm_stub.c
@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2022, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+
+#include <stdint.h>
+
+#include <services/drtm_svc.h>
+
+/*
+ * This file contains DRTM platform functions which don't really do anything on
+ * FVP but are needed for DRTM to function.
+ */
+
+uint64_t plat_drtm_get_min_size_normal_world_dce(void)
+{
+	return 0ULL;
+}
+
+uint64_t plat_drtm_get_imp_def_dlme_region_size(void)
+{
+	return 0ULL;
+}
+
+uint64_t plat_drtm_get_tcb_hash_features(void)
+{
+	return 0ULL;
+}
+
+uint64_t plat_drtm_get_tcb_hash_table_size(void)
+{
+	return 0ULL;
+}
diff --git a/plat/arm/board/fvp/fvp_err.c b/plat/arm/board/fvp/fvp_err.c
index 1f9f0dd..244659a 100644
--- a/plat/arm/board/fvp/fvp_err.c
+++ b/plat/arm/board/fvp/fvp_err.c
@@ -29,3 +29,15 @@
 	for (;;)
 		wfi();
 }
+
+void __dead2 plat_arm_system_reset(void)
+{
+	/* Write the System Configuration Control Register */
+	mmio_write_32(V2M_SYSREGS_BASE + V2M_SYS_CFGCTRL,
+		      V2M_CFGCTRL_START |
+		      V2M_CFGCTRL_RW |
+		      V2M_CFGCTRL_FUNC(V2M_FUNC_REBOOT));
+	wfi();
+	ERROR("FVP System Reset: operation not handled.\n");
+	panic();
+}
diff --git a/plat/arm/board/fvp/include/platform_def.h b/plat/arm/board/fvp/include/platform_def.h
index e1bf46d..1ef6c87 100644
--- a/plat/arm/board/fvp/include/platform_def.h
+++ b/plat/arm/board/fvp/include/platform_def.h
@@ -144,6 +144,8 @@
 #  else
 #   if ENABLE_RME
 #    define MAX_XLAT_TABLES		8
+#   elif DRTM_SUPPORT
+#    define MAX_XLAT_TABLES		8
 #   else
 #    define MAX_XLAT_TABLES		7
 #   endif
@@ -247,7 +249,11 @@
 #elif defined(IMAGE_BL2U)
 # define PLATFORM_STACK_SIZE		UL(0x400)
 #elif defined(IMAGE_BL31)
+# if DRTM_SUPPORT
+#  define PLATFORM_STACK_SIZE		UL(0x1000)
+# else
 #  define PLATFORM_STACK_SIZE		UL(0x800)
+# endif /* DRTM_SUPPORT */
 #elif defined(IMAGE_BL32)
 # if SPMC_AT_EL3
 #  define PLATFORM_STACK_SIZE		UL(0x1000)
@@ -397,4 +403,14 @@
  */
 #define	PLAT_ARM_EVENT_LOG_MAX_SIZE		UL(0x400)
 
+/*
+ * Maximum size of Event Log buffer used for DRTM
+ */
+#define PLAT_DRTM_EVENT_LOG_MAX_SIZE		UL(0x300)
+
+/*
+ * Number of MMAP entries used by DRTM implementation
+ */
+#define PLAT_DRTM_MMAP_ENTRIES			PLAT_ARM_MMAP_ENTRIES
+
 #endif /* PLATFORM_DEF_H */
diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk
index a20343b..5a21ff6 100644
--- a/plat/arm/board/fvp/platform.mk
+++ b/plat/arm/board/fvp/platform.mk
@@ -413,6 +413,16 @@
 
 endif
 
+ifeq (${DRTM_SUPPORT}, 1)
+BL31_SOURCES   += plat/arm/board/fvp/fvp_drtm_addr.c	\
+		  plat/arm/board/fvp/fvp_drtm_dma_prot.c	\
+		  plat/arm/board/fvp/fvp_drtm_err.c	\
+		  plat/arm/board/fvp/fvp_drtm_measurement.c	\
+		  plat/arm/board/fvp/fvp_drtm_stub.c	\
+		  plat/arm/common/arm_dyn_cfg.c		\
+		  plat/arm/board/fvp/fvp_err.c
+endif
+
 ifeq (${TRUSTED_BOARD_BOOT}, 1)
 BL1_SOURCES		+=	plat/arm/board/fvp/fvp_trusted_boot.c
 BL2_SOURCES		+=	plat/arm/board/fvp/fvp_trusted_boot.c
diff --git a/plat/arm/common/arm_common.c b/plat/arm/common/arm_common.c
index 946b732..fc68114 100644
--- a/plat/arm/common/arm_common.c
+++ b/plat/arm/common/arm_common.c
@@ -237,3 +237,7 @@
 }
 #endif
 
+const mmap_region_t *plat_get_addr_mmap(void)
+{
+	return plat_arm_mmap;
+}
diff --git a/plat/arm/common/arm_common.mk b/plat/arm/common/arm_common.mk
index bd59ec0..6f3b889 100644
--- a/plat/arm/common/arm_common.mk
+++ b/plat/arm/common/arm_common.mk
@@ -363,6 +363,10 @@
 BL31_SOURCES		+=	${FDT_WRAPPERS_SOURCES}
 endif
 
+ifeq (${DRTM_SUPPORT},1)
+BL31_SOURCES            +=	plat/arm/common/arm_err.c
+endif
+
 ifneq (${TRUSTED_BOARD_BOOT},0)
 
     # Include common TBB sources
@@ -406,7 +410,7 @@
 # Include Measured Boot makefile before any Crypto library makefile.
 # Crypto library makefile may need default definitions of Measured Boot build
 # flags present in Measured Boot makefile.
-ifeq (${MEASURED_BOOT},1)
+ifneq ($(filter 1,${MEASURED_BOOT} ${DRTM_SUPPORT}),)
     MEASURED_BOOT_MK := drivers/measured_boot/event_log/event_log.mk
     $(info Including ${MEASURED_BOOT_MK})
     include ${MEASURED_BOOT_MK}
@@ -415,15 +419,22 @@
         $(eval $(call add_define,TF_MBEDTLS_MBOOT_USE_SHA512))
     endif
 
-    BL1_SOURCES		+= 	${EVENT_LOG_SOURCES}
-    BL2_SOURCES		+= 	${EVENT_LOG_SOURCES}
+    ifeq (${MEASURED_BOOT},1)
+         BL1_SOURCES		+= 	${EVENT_LOG_SOURCES}
+         BL2_SOURCES		+= 	${EVENT_LOG_SOURCES}
+    endif
+
+    ifeq (${DRTM_SUPPORT},1)
+         BL31_SOURCES	        += 	${EVENT_LOG_SOURCES}
+    endif
 endif
 
-ifneq ($(filter 1,${MEASURED_BOOT} ${TRUSTED_BOARD_BOOT}),)
+ifneq ($(filter 1,${MEASURED_BOOT} ${TRUSTED_BOARD_BOOT} ${DRTM_SUPPORT}),)
     CRYPTO_SOURCES	:=	drivers/auth/crypto_mod.c 	\
 				lib/fconf/fconf_tbbr_getter.c
     BL1_SOURCES		+=	${CRYPTO_SOURCES}
     BL2_SOURCES		+=	${CRYPTO_SOURCES}
+    BL31_SOURCES	+=	drivers/auth/crypto_mod.c
 
     # We expect to locate the *.mk files under the directories specified below
     ifeq (${ARM_CRYPTOCELL_INTEG},0)
diff --git a/plat/arm/common/arm_dyn_cfg.c b/plat/arm/common/arm_dyn_cfg.c
index a62693c..c88621e 100644
--- a/plat/arm/common/arm_dyn_cfg.c
+++ b/plat/arm/common/arm_dyn_cfg.c
@@ -45,7 +45,7 @@
 	assert(heap_addr != NULL);
 	assert(heap_size != NULL);
 
-#if defined(IMAGE_BL1) || BL2_AT_EL3
+#if defined(IMAGE_BL1) || BL2_AT_EL3 || defined(IMAGE_BL31)
 
 	/* If in BL1 or BL2_AT_EL3 define a heap */
 	static unsigned char heap[TF_MBEDTLS_HEAP_SIZE];
diff --git a/plat/arm/common/arm_err.c b/plat/arm/common/arm_err.c
index f80ba78..fa36e8d 100644
--- a/plat/arm/common/arm_err.c
+++ b/plat/arm/common/arm_err.c
@@ -13,3 +13,8 @@
 {
 	plat_arm_error_handler(err);
 }
+
+void __dead2 plat_system_reset(void)
+{
+	plat_arm_system_reset();
+}
diff --git a/services/std_svc/drtm/drtm_dma_prot.c b/services/std_svc/drtm/drtm_dma_prot.c
new file mode 100644
index 0000000..48317fd
--- /dev/null
+++ b/services/std_svc/drtm/drtm_dma_prot.c
@@ -0,0 +1,263 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ * DRTM DMA protection.
+ *
+ * Authors:
+ *      Lucian Paul-Trifu <lucian.paultrifu@gmail.com>
+ *
+ */
+
+#include <stdint.h>
+#include <string.h>
+
+#include <common/debug.h>
+#include <drivers/arm/smmu_v3.h>
+#include "drtm_dma_prot.h"
+#include "drtm_main.h"
+#include "drtm_remediation.h"
+#include <plat/common/platform.h>
+#include <smccc_helpers.h>
+
+/*
+ *  ________________________  LAUNCH success        ________________________
+ * |        Initial         | -------------------> |      Prot engaged      |
+ * |````````````````````````|                      |````````````````````````|
+ * |  request.type == NONE  |                      |  request.type != NONE  |
+ * |                        | <------------------- |                        |
+ * `________________________'        UNPROTECT_MEM `________________________'
+ *
+ * Transitions that are not shown correspond to ABI calls that do not change
+ * state and result in an error being returned to the caller.
+ */
+static struct dma_prot active_prot = {
+	.type = PROTECT_NONE,
+};
+
+/* Version-independent type. */
+typedef struct drtm_dl_dma_prot_args_v1 struct_drtm_dl_dma_prot_args;
+
+/*
+ * This function checks that platform supports complete DMA protection.
+ * and returns false - if the platform supports complete DMA protection.
+ * and returns true - if the platform does not support complete DMA protection.
+ */
+bool drtm_dma_prot_init(void)
+{
+	bool must_init_fail = false;
+	const uintptr_t *smmus;
+	size_t num_smmus = 0;
+	unsigned int total_smmus;
+
+	/* Warns presence of non-host platforms */
+	if (plat_has_non_host_platforms()) {
+		WARN("DRTM: the platform includes trusted DMA-capable devices"
+				" (non-host platforms)\n");
+	}
+
+	/*
+	 * DLME protection is uncertain on platforms with peripherals whose
+	 * DMA is not managed by an SMMU. DRTM doesn't work on such platforms.
+	 */
+	if (plat_has_unmanaged_dma_peripherals()) {
+		ERROR("DRTM: this platform does not provide DMA protection\n");
+		must_init_fail = true;
+	}
+
+	/*
+	 * Check that the platform reported all SMMUs.
+	 * It is acceptable if the platform doesn't have any SMMUs when it
+	 * doesn't have any DMA-capable devices.
+	 */
+	total_smmus = plat_get_total_smmus();
+	plat_enumerate_smmus(&smmus, &num_smmus);
+	if (num_smmus != total_smmus) {
+		ERROR("DRTM: could not discover all SMMUs\n");
+		must_init_fail = true;
+	}
+
+	return must_init_fail;
+}
+
+/*
+ * Checks that the DMA protection arguments are valid and that the given
+ * protected regions are covered by DMA protection.
+ */
+enum drtm_retc drtm_dma_prot_check_args(const struct_drtm_dl_dma_prot_args *a,
+					int a_dma_prot_type,
+					drtm_mem_region_t p)
+{
+	switch ((enum dma_prot_type)a_dma_prot_type) {
+	case PROTECT_MEM_ALL:
+		if (a->dma_prot_table_paddr || a->dma_prot_table_size) {
+			ERROR("DRTM: invalid launch due to inconsistent"
+			      " DMA protection arguments\n");
+			return MEM_PROTECT_INVALID;
+		}
+		/*
+		 * Full DMA protection ought to ensure that the DLME and NWd
+		 * DCE regions are protected, no further checks required.
+		 */
+		return SUCCESS;
+
+	default:
+		ERROR("DRTM: invalid launch due to unsupported DMA protection type\n");
+		return MEM_PROTECT_INVALID;
+	}
+}
+
+enum drtm_retc drtm_dma_prot_engage(const struct_drtm_dl_dma_prot_args *a,
+				    int a_dma_prot_type)
+{
+	const uintptr_t *smmus;
+	size_t num_smmus = 0;
+
+	if (active_prot.type != PROTECT_NONE) {
+		ERROR("DRTM: launch denied as previous DMA protection"
+		      " is still engaged\n");
+		return DENIED;
+	}
+
+	if (a_dma_prot_type == PROTECT_NONE) {
+		return SUCCESS;
+		/* Only PROTECT_MEM_ALL is supported currently. */
+	} else if (a_dma_prot_type != PROTECT_MEM_ALL) {
+		ERROR("%s(): unimplemented DMA protection type\n", __func__);
+		panic();
+	}
+
+	/*
+	 * Engage SMMUs in accordance with the request we have previously received.
+	 * Only PROTECT_MEM_ALL is implemented currently.
+	 */
+	plat_enumerate_smmus(&smmus, &num_smmus);
+	for (const uintptr_t *smmu = smmus; smmu < smmus+num_smmus; smmu++) {
+		/*
+		 * TODO: Invalidate SMMU's Stage-1 and Stage-2 TLB entries.  This ensures
+		 * that any outstanding device transactions are completed, see Section
+		 * 3.21.1, specification IHI_0070_C_a for an approximate reference.
+		 */
+		int rc = smmuv3_ns_set_abort_all(*smmu);
+		if (rc != 0) {
+			ERROR("DRTM: SMMU at PA 0x%lx failed to engage DMA protection"
+			      " rc=%d\n", *smmu, rc);
+			return INTERNAL_ERROR;
+		}
+	}
+
+	/*
+	 * TODO: Restrict DMA from the GIC.
+	 *
+	 * Full DMA protection may be achieved as follows:
+	 *
+	 * With a GICv3:
+	 * - Set GICR_CTLR.EnableLPIs to 0, for each GICR;
+	 *   GICR_CTLR.RWP == 0 must be the case before finishing, for each GICR.
+	 * - Set GITS_CTLR.Enabled to 0;
+	 *   GITS_CTLR.Quiescent == 1 must be the case before finishing.
+	 *
+	 * In addition, with a GICv4:
+	 * - Set GICR_VPENDBASER.Valid to 0, for each GICR;
+	 *   GICR_CTLR.RWP == 0 must be the case before finishing, for each GICR.
+	 *
+	 * Alternatively, e.g. if some bit values cannot be changed at runtime,
+	 * this procedure should return an error if the LPI Pending and
+	 * Configuration tables overlap the regions being protected.
+	 */
+
+	active_prot.type = a_dma_prot_type;
+
+	return SUCCESS;
+}
+
+/*
+ * Undo what has previously been done in drtm_dma_prot_engage(), or enter
+ * remediation if it is not possible.
+ */
+enum drtm_retc drtm_dma_prot_disengage(void)
+{
+	const uintptr_t *smmus;
+	size_t num_smmus = 0;
+	const char *err_str = "cannot undo PROTECT_MEM_ALL SMMU config";
+
+	if (active_prot.type == PROTECT_NONE) {
+		return SUCCESS;
+		/* Only PROTECT_MEM_ALL is supported currently. */
+	} else if (active_prot.type != PROTECT_MEM_ALL) {
+		ERROR("%s(): unimplemented DMA protection type\n", __func__);
+		panic();
+	}
+
+	/*
+	 * For PROTECT_MEM_ALL, undo the SMMU configuration for "abort all" mode
+	 * done during engage().
+	 */
+	/* Simply enter remediation for now. */
+	(void)smmus;
+	(void)num_smmus;
+	drtm_enter_remediation(1ULL, err_str);
+
+	/* TODO: Undo GIC DMA restrictions. */
+
+	active_prot.type = PROTECT_NONE;
+
+	return SUCCESS;
+}
+
+uint64_t drtm_unprotect_mem(void *ctx)
+{
+	enum drtm_retc ret;
+
+	switch (active_prot.type) {
+	case PROTECT_NONE:
+		ERROR("DRTM: invalid UNPROTECT_MEM, no DMA protection has"
+		      " previously been engaged\n");
+		ret = DENIED;
+		break;
+
+	case PROTECT_MEM_ALL:
+		/*
+		 * UNPROTECT_MEM is a no-op for PROTECT_MEM_ALL:  DRTM must not touch
+		 * the NS SMMU as it is expected that the DLME has configured it.
+		 */
+		active_prot.type = PROTECT_NONE;
+
+		ret = SUCCESS;
+		break;
+
+	default:
+		ret = drtm_dma_prot_disengage();
+		break;
+	}
+
+	SMC_RET1(ctx, ret);
+}
+
+void drtm_dma_prot_serialise_table(uint8_t *dst, size_t *size_out)
+{
+	if (active_prot.type == PROTECT_NONE) {
+		return;
+	} else if (active_prot.type != PROTECT_MEM_ALL) {
+		ERROR("%s(): unimplemented DMA protection type\n", __func__);
+		panic();
+	}
+
+	struct __packed descr_table_1 {
+		drtm_memory_region_descriptor_table_t header;
+		drtm_mem_region_t regions[1];
+	} prot_table = {
+		.header = {
+			.revision = 1,
+			.num_regions = sizeof(((struct descr_table_1 *)NULL)->regions) /
+				sizeof(((struct descr_table_1 *)NULL)->regions[0])
+		},
+		.regions = {
+			{.region_address = 0, PAGES_AND_TYPE(UINT64_MAX, 0x3)},
+		}
+	};
+
+	memcpy(dst, &prot_table, sizeof(prot_table));
+	*size_out = sizeof(prot_table);
+}
diff --git a/services/std_svc/drtm/drtm_dma_prot.h b/services/std_svc/drtm/drtm_dma_prot.h
new file mode 100644
index 0000000..79dc9cb
--- /dev/null
+++ b/services/std_svc/drtm/drtm_dma_prot.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ */
+#ifndef DRTM_DMA_PROT_H
+#define DRTM_DMA_PROT_H
+
+#include <stdint.h>
+#include <plat/common/platform.h>
+#include <services/drtm_svc.h>
+
+struct __packed drtm_dl_dma_prot_args_v1 {
+	uint64_t dma_prot_table_paddr;
+	uint64_t dma_prot_table_size;
+};
+
+/* Values for DRTM_PROTECT_MEMORY */
+enum dma_prot_type {
+	PROTECT_NONE    = -1,
+	PROTECT_MEM_ALL = 0,
+	PROTECT_MEM_REGION = 2,
+};
+
+struct dma_prot {
+	enum dma_prot_type type;
+};
+
+#define DRTM_MEM_REGION_PAGES_AND_TYPE(pages, type) \
+	(((uint64_t)(pages) & (((uint64_t)1 << 52) - 1)) \
+	 | (((uint64_t)(type) & 0x7) << 52))
+
+#define PAGES_AND_TYPE(pages, type) \
+		.region_size_type = DRTM_MEM_REGION_PAGES_AND_TYPE(pages, type)
+
+/* Opaque / encapsulated type. */
+typedef struct drtm_dl_dma_prot_args_v1 drtm_dl_dma_prot_args_v1_t;
+
+bool drtm_dma_prot_init(void);
+enum drtm_retc drtm_dma_prot_check_args(const drtm_dl_dma_prot_args_v1_t *a,
+					int a_dma_prot_type,
+					drtm_mem_region_t p);
+enum drtm_retc drtm_dma_prot_engage(const drtm_dl_dma_prot_args_v1_t *a,
+				    int a_dma_prot_type);
+enum drtm_retc drtm_dma_prot_disengage(void);
+uint64_t drtm_unprotect_mem(void *ctx);
+void drtm_dma_prot_serialise_table(uint8_t *dst, size_t *size_out);
+
+#endif /* DRTM_DMA_PROT_H */
diff --git a/services/std_svc/drtm/drtm_main.c b/services/std_svc/drtm/drtm_main.c
new file mode 100644
index 0000000..e0f5c17
--- /dev/null
+++ b/services/std_svc/drtm/drtm_main.c
@@ -0,0 +1,838 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ * DRTM service
+ *
+ * Authors:
+ *	Lucian Paul-Trifu <lucian.paultrifu@gmail.com>
+ *	Brian Nezvadovitz <brinez@microsoft.com> 2021-02-01
+ */
+
+#include <stdint.h>
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <common/bl_common.h>
+#include <common/debug.h>
+#include <common/runtime_svc.h>
+#include <drivers/auth/crypto_mod.h>
+#include "drtm_main.h"
+#include "drtm_measurements.h"
+#include "drtm_remediation.h"
+#include <lib/el3_runtime/context_mgmt.h>
+#include <lib/psci/psci_lib.h>
+#include <lib/xlat_tables/xlat_tables_v2.h>
+#include <plat/common/platform.h>
+#include <services/drtm_svc.h>
+#include <services/sdei.h>
+#include <platform_def.h>
+
+/* Structure to store DRTM features specific to the platform. */
+static drtm_features_t plat_drtm_features;
+
+/* DRTM-formatted memory map. */
+static drtm_memory_region_descriptor_table_t *plat_drtm_mem_map;
+
+/* DLME header */
+struct_dlme_data_header dlme_data_hdr_init;
+
+/* Minimum data memory requirement */
+uint64_t dlme_data_min_size;
+
+int drtm_setup(void)
+{
+	bool rc;
+	const plat_drtm_tpm_features_t *plat_tpm_feat;
+	const plat_drtm_dma_prot_features_t *plat_dma_prot_feat;
+
+	INFO("DRTM service setup\n");
+
+	/* Read boot PE ID from MPIDR */
+	plat_drtm_features.boot_pe_id = read_mpidr_el1() & MPIDR_AFFINITY_MASK;
+
+	rc = drtm_dma_prot_init();
+	if (rc) {
+		return INTERNAL_ERROR;
+	}
+
+	/*
+	 * initialise the platform supported crypto module that will
+	 * be used by the DRTM-service to calculate hash of DRTM-
+	 * implementation specific components
+	 */
+	crypto_mod_init();
+
+	/* Build DRTM-compatible address map. */
+	plat_drtm_mem_map = drtm_build_address_map();
+	if (plat_drtm_mem_map == NULL) {
+		return INTERNAL_ERROR;
+	}
+
+	/* Get DRTM features from platform hooks. */
+	plat_tpm_feat = plat_drtm_get_tpm_features();
+	if (plat_tpm_feat == NULL) {
+		return INTERNAL_ERROR;
+	}
+
+	plat_dma_prot_feat = plat_drtm_get_dma_prot_features();
+	if (plat_dma_prot_feat == NULL) {
+		return INTERNAL_ERROR;
+	}
+
+	/*
+	 * Add up minimum DLME data memory.
+	 *
+	 * For systems with complete DMA protection there is only one entry in
+	 * the protected regions table.
+	 */
+	if (plat_dma_prot_feat->dma_protection_support ==
+			ARM_DRTM_DMA_PROT_FEATURES_DMA_SUPPORT_COMPLETE) {
+		dlme_data_min_size =
+			sizeof(drtm_memory_region_descriptor_table_t) +
+			sizeof(drtm_mem_region_t);
+		dlme_data_hdr_init.dlme_prot_regions_size = dlme_data_min_size;
+	} else {
+		/*
+		 * TODO set protected regions table size based on platform DMA
+		 * protection configuration
+		 */
+		panic();
+	}
+
+	dlme_data_hdr_init.dlme_addr_map_size = drtm_get_address_map_size();
+	dlme_data_hdr_init.dlme_tcb_hashes_table_size =
+				plat_drtm_get_tcb_hash_table_size();
+	dlme_data_hdr_init.dlme_impdef_region_size =
+				plat_drtm_get_imp_def_dlme_region_size();
+
+	dlme_data_min_size += dlme_data_hdr_init.dlme_addr_map_size +
+			      PLAT_DRTM_EVENT_LOG_MAX_SIZE +
+			      dlme_data_hdr_init.dlme_tcb_hashes_table_size +
+			      dlme_data_hdr_init.dlme_impdef_region_size;
+
+	dlme_data_min_size = page_align(dlme_data_min_size, UP)/PAGE_SIZE;
+
+	/* Fill out platform DRTM features structure */
+	/* Only support default PCR schema (0x1) in this implementation. */
+	ARM_DRTM_TPM_FEATURES_SET_PCR_SCHEMA(plat_drtm_features.tpm_features,
+		ARM_DRTM_TPM_FEATURES_PCR_SCHEMA_DEFAULT);
+	ARM_DRTM_TPM_FEATURES_SET_TPM_HASH(plat_drtm_features.tpm_features,
+		plat_tpm_feat->tpm_based_hash_support);
+	ARM_DRTM_TPM_FEATURES_SET_FW_HASH(plat_drtm_features.tpm_features,
+		plat_tpm_feat->firmware_hash_algorithm);
+	ARM_DRTM_MIN_MEM_REQ_SET_MIN_DLME_DATA_SIZE(plat_drtm_features.minimum_memory_requirement,
+		dlme_data_min_size);
+	ARM_DRTM_MIN_MEM_REQ_SET_DCE_SIZE(plat_drtm_features.minimum_memory_requirement,
+		plat_drtm_get_min_size_normal_world_dce());
+	ARM_DRTM_DMA_PROT_FEATURES_SET_MAX_REGIONS(plat_drtm_features.dma_prot_features,
+		plat_dma_prot_feat->max_num_mem_prot_regions);
+	ARM_DRTM_DMA_PROT_FEATURES_SET_DMA_SUPPORT(plat_drtm_features.dma_prot_features,
+		plat_dma_prot_feat->dma_protection_support);
+	ARM_DRTM_TCB_HASH_FEATURES_SET_MAX_NUM_HASHES(plat_drtm_features.tcb_hash_features,
+		plat_drtm_get_tcb_hash_features());
+
+	return 0;
+}
+
+static inline void invalidate_icache_all(void)
+{
+	__asm__ volatile("ic      ialluis");
+	dsb();
+	isb();
+}
+
+static inline uint64_t drtm_features_tpm(void *ctx)
+{
+	SMC_RET2(ctx, 1ULL, /* TPM feature is supported */
+		 plat_drtm_features.tpm_features);
+}
+
+static inline uint64_t drtm_features_mem_req(void *ctx)
+{
+	SMC_RET2(ctx, 1ULL, /* memory req Feature is supported */
+		 plat_drtm_features.minimum_memory_requirement);
+}
+
+static inline uint64_t drtm_features_boot_pe_id(void *ctx)
+{
+	SMC_RET2(ctx, 1ULL, /* Boot PE feature is supported */
+		 plat_drtm_features.boot_pe_id);
+}
+
+static inline uint64_t drtm_features_dma_prot(void *ctx)
+{
+	SMC_RET2(ctx, 1ULL, /* DMA protection feature is supported */
+		 plat_drtm_features.dma_prot_features);
+}
+
+static inline uint64_t drtm_features_tcb_hashes(void *ctx)
+{
+	SMC_RET2(ctx, 1ULL, /* TCB hash feature is supported */
+		 plat_drtm_features.tcb_hash_features);
+}
+
+static enum drtm_retc drtm_dl_check_caller_el(void *ctx)
+{
+	uint64_t spsr_el3 = read_ctx_reg(get_el3state_ctx(ctx), CTX_SPSR_EL3);
+	uint64_t dl_caller_el;
+	uint64_t dl_caller_aarch;
+
+	dl_caller_el = spsr_el3 >> MODE_EL_SHIFT & MODE_EL_MASK;
+	dl_caller_aarch = spsr_el3 >> MODE_RW_SHIFT & MODE_RW_MASK;
+
+	/* Caller's security state is checked from drtm_smc_handle function */
+
+	/* Caller can be NS-EL2/EL1 */
+	if (dl_caller_el == MODE_EL3) {
+		ERROR("DRTM: invalid launch from EL3\n");
+		return DENIED;
+	}
+
+	if (dl_caller_aarch != MODE_RW_64) {
+		ERROR("DRTM: invalid launch from non-AArch64 execution state\n");
+		return DENIED;
+	}
+
+	return SUCCESS;
+}
+
+static enum drtm_retc drtm_dl_check_cores(void)
+{
+	bool running_on_single_core;
+	uint64_t this_pe_aff_value = read_mpidr_el1() & MPIDR_AFFINITY_MASK;
+
+	if (this_pe_aff_value != plat_drtm_features.boot_pe_id) {
+		ERROR("DRTM: invalid launch on a non-boot PE\n");
+		return DENIED;
+	}
+
+	running_on_single_core = psci_is_last_on_cpu_safe();
+	if (!running_on_single_core) {
+		ERROR("DRTM: invalid launch due to non-boot PE not being turned off\n");
+		return DENIED;
+	}
+
+	return SUCCESS;
+}
+
+static enum drtm_retc drtm_dl_prepare_dlme_data(const struct_drtm_dl_args *args)
+{
+	int rc;
+	uint64_t dlme_data_paddr;
+	size_t dlme_data_max_size;
+	uintptr_t dlme_data_mapping;
+	struct_dlme_data_header *dlme_data_hdr;
+	uint8_t *dlme_data_cursor;
+	size_t dlme_data_mapping_bytes;
+	size_t serialised_bytes_actual;
+
+	dlme_data_paddr = args->dlme_paddr + args->dlme_data_off;
+	dlme_data_max_size = args->dlme_size - args->dlme_data_off;
+
+	/*
+	 * The capacity of the given DLME data region is checked when
+	 * the other dynamic launch arguments are.
+	 */
+	if (dlme_data_max_size < dlme_data_min_size) {
+		ERROR("%s: assertion failed:"
+		      " dlme_data_max_size (%ld) < dlme_data_total_bytes_req (%ld)\n",
+		      __func__, dlme_data_max_size, dlme_data_min_size);
+		panic();
+	}
+
+	/* Map the DLME data region as NS memory. */
+	dlme_data_mapping_bytes = ALIGNED_UP(dlme_data_max_size, DRTM_PAGE_SIZE);
+	rc = mmap_add_dynamic_region_alloc_va(dlme_data_paddr,
+					      &dlme_data_mapping,
+					      dlme_data_mapping_bytes,
+					      MT_RW_DATA | MT_NS |
+					      MT_SHAREABILITY_ISH);
+	if (rc != 0) {
+		WARN("DRTM: %s: mmap_add_dynamic_region() failed rc=%d\n",
+		     __func__, rc);
+		return INTERNAL_ERROR;
+	}
+	dlme_data_hdr = (struct_dlme_data_header *)dlme_data_mapping;
+	dlme_data_cursor = (uint8_t *)dlme_data_hdr + sizeof(*dlme_data_hdr);
+
+	memcpy(dlme_data_hdr, (const void *)&dlme_data_hdr_init,
+	       sizeof(*dlme_data_hdr));
+
+	/* Set the header version and size. */
+	dlme_data_hdr->version = 1;
+	dlme_data_hdr->this_hdr_size = sizeof(*dlme_data_hdr);
+
+	/* Prepare DLME protected regions. */
+	drtm_dma_prot_serialise_table(dlme_data_cursor,
+				      &serialised_bytes_actual);
+	assert(serialised_bytes_actual ==
+	       dlme_data_hdr->dlme_prot_regions_size);
+	dlme_data_cursor += serialised_bytes_actual;
+
+	/* Prepare DLME address map. */
+	if (plat_drtm_mem_map != NULL) {
+		memcpy(dlme_data_cursor, plat_drtm_mem_map,
+		       dlme_data_hdr->dlme_addr_map_size);
+	} else {
+		WARN("DRTM: DLME address map is not in the cache\n");
+	}
+	dlme_data_cursor += dlme_data_hdr->dlme_addr_map_size;
+
+	/* Prepare DRTM event log for DLME. */
+	drtm_serialise_event_log(dlme_data_cursor, &serialised_bytes_actual);
+	assert(serialised_bytes_actual <= PLAT_DRTM_EVENT_LOG_MAX_SIZE);
+	dlme_data_hdr->dlme_tpm_log_size = serialised_bytes_actual;
+	dlme_data_cursor += serialised_bytes_actual;
+
+	/*
+	 * TODO: Prepare the TCB hashes for DLME, currently its size
+	 * 0
+	 */
+	dlme_data_cursor += dlme_data_hdr->dlme_tcb_hashes_table_size;
+
+	/* Implementation-specific region size is unused. */
+	dlme_data_cursor += dlme_data_hdr->dlme_impdef_region_size;
+
+	/*
+	 * Prepare DLME data size, includes all data region referenced above
+	 * alongwith the DLME data header
+	 */
+	dlme_data_hdr->dlme_data_size = dlme_data_cursor - (uint8_t *)dlme_data_hdr;
+
+	/* Unmap the DLME data region. */
+	rc = mmap_remove_dynamic_region(dlme_data_mapping, dlme_data_mapping_bytes);
+	if (rc != 0) {
+		ERROR("%s(): mmap_remove_dynamic_region() failed"
+		      " unexpectedly rc=%d\n", __func__, rc);
+		panic();
+	}
+
+	return SUCCESS;
+}
+
+/*
+ * Note: accesses to the dynamic launch args, and to the DLME data are
+ * little-endian as required, thanks to TF-A BL31 init requirements.
+ */
+static enum drtm_retc drtm_dl_check_args(uint64_t x1,
+					 struct_drtm_dl_args *a_out)
+{
+	uint64_t dlme_start, dlme_end;
+	uint64_t dlme_img_start, dlme_img_ep, dlme_img_end;
+	uint64_t dlme_data_start, dlme_data_end;
+	uintptr_t va_mapping;
+	size_t va_mapping_size;
+	struct_drtm_dl_args *a;
+	struct_drtm_dl_args args_buf;
+	int rc;
+
+	if (x1 % DRTM_PAGE_SIZE != 0) {
+		ERROR("DRTM: parameters structure is not "
+		      DRTM_PAGE_SIZE_STR "-aligned\n");
+		return INVALID_PARAMETERS;
+	}
+
+	va_mapping_size = ALIGNED_UP(sizeof(struct_drtm_dl_args), DRTM_PAGE_SIZE);
+
+	/* check DRTM parameters are within NS address region */
+	rc = plat_drtm_validate_ns_region(x1, va_mapping_size);
+	if (rc != 0) {
+		ERROR("DRTM: parameters lies within secure memory\n");
+		return INVALID_PARAMETERS;
+	}
+
+	rc = mmap_add_dynamic_region_alloc_va(x1, &va_mapping, va_mapping_size,
+					      MT_MEMORY | MT_NS | MT_RO |
+					      MT_SHAREABILITY_ISH);
+	if (rc != 0) {
+		WARN("DRTM: %s: mmap_add_dynamic_region() failed rc=%d\n",
+		      __func__, rc);
+		return INTERNAL_ERROR;
+	}
+	a = (struct_drtm_dl_args *)va_mapping;
+
+	/* Sanitize cache of data passed in args by the DCE Preamble. */
+	flush_dcache_range(va_mapping, va_mapping_size);
+
+	args_buf = *a;
+
+	rc = mmap_remove_dynamic_region(va_mapping, va_mapping_size);
+	if (rc) {
+		ERROR("%s(): mmap_remove_dynamic_region() failed unexpectedly"
+		      " rc=%d\n", __func__, rc);
+		panic();
+	}
+	a = &args_buf;
+
+	if (a->version != 1) {
+		ERROR("DRTM: parameters structure incompatible with major version %d\n",
+		      ARM_DRTM_VERSION_MAJOR);
+		return NOT_SUPPORTED;
+	}
+
+	if (!(a->dlme_img_off < a->dlme_size &&
+	      a->dlme_data_off < a->dlme_size)) {
+		ERROR("DRTM: argument offset is outside of the DLME region\n");
+		return INVALID_PARAMETERS;
+	}
+	dlme_start = a->dlme_paddr;
+	dlme_end = a->dlme_paddr + a->dlme_size;
+	dlme_img_start = a->dlme_paddr + a->dlme_img_off;
+	dlme_img_ep = dlme_img_start + a->dlme_img_ep_off;
+	dlme_img_end = dlme_img_start + a->dlme_img_size;
+	dlme_data_start = a->dlme_paddr + a->dlme_data_off;
+	dlme_data_end = dlme_end;
+
+	/* Check the DLME regions arguments. */
+	if ((dlme_start % DRTM_PAGE_SIZE) != 0) {
+		ERROR("DRTM: argument DLME region is not "
+		      DRTM_PAGE_SIZE_STR "-aligned\n");
+		return INVALID_PARAMETERS;
+	}
+
+	if (!(dlme_start < dlme_end &&
+	      dlme_start <= dlme_img_start && dlme_img_start < dlme_img_end &&
+	      dlme_start <= dlme_data_start && dlme_data_start < dlme_data_end)) {
+		ERROR("DRTM: argument DLME region is discontiguous\n");
+		return INVALID_PARAMETERS;
+	}
+
+	if (dlme_img_start < dlme_data_end && dlme_data_start < dlme_img_end) {
+		ERROR("DRTM: argument DLME regions overlap\n");
+		return INVALID_PARAMETERS;
+	}
+
+	/* Check the DLME image region arguments. */
+	if ((dlme_img_start % DRTM_PAGE_SIZE) != 0) {
+		ERROR("DRTM: argument DLME image region is not "
+		      DRTM_PAGE_SIZE_STR "-aligned\n");
+		return INVALID_PARAMETERS;
+	}
+
+	if (!(dlme_img_start <= dlme_img_ep && dlme_img_ep < dlme_img_end)) {
+		ERROR("DRTM: DLME entry point is outside of the DLME image region\n");
+		return INVALID_PARAMETERS;
+	}
+
+	if ((dlme_img_ep % 4) != 0) {
+		ERROR("DRTM: DLME image entry point is not 4-byte-aligned\n");
+		return INVALID_PARAMETERS;
+	}
+
+	/* Check the DLME data region arguments. */
+	if ((dlme_data_start % DRTM_PAGE_SIZE) != 0) {
+		ERROR("DRTM: argument DLME data region is not "
+		      DRTM_PAGE_SIZE_STR "-aligned\n");
+		return INVALID_PARAMETERS;
+	}
+
+	if (dlme_data_end - dlme_data_start < dlme_data_min_size) {
+		ERROR("DRTM: argument DLME data region is short of %lu bytes\n",
+		      dlme_data_min_size - (size_t)(dlme_data_end - dlme_data_start));
+		return INVALID_PARAMETERS;
+	}
+
+	/* check DLME region (paddr + size) is within a NS address region */
+	rc = plat_drtm_validate_ns_region(dlme_start, (size_t)a->dlme_size);
+	if (rc != 0) {
+		ERROR("DRTM: DLME region lies within secure memory\n");
+		return INVALID_PARAMETERS;
+	}
+
+	/* Check the Normal World DCE region arguments. */
+	if (a->dce_nwd_paddr != 0) {
+		uint32_t dce_nwd_start = a->dce_nwd_paddr;
+		uint32_t dce_nwd_end = dce_nwd_start + a->dce_nwd_size;
+
+		if (!(dce_nwd_start < dce_nwd_end)) {
+			ERROR("DRTM: argument Normal World DCE region is dicontiguous\n");
+			return INVALID_PARAMETERS;
+		}
+
+		if (dce_nwd_start < dlme_end && dlme_start < dce_nwd_end) {
+			ERROR("DRTM: argument Normal World DCE regions overlap\n");
+			return INVALID_PARAMETERS;
+		}
+	}
+
+	/*
+	 * Map and sanitize the cache of data range passed by DCE Preamble. This
+	 * is required to avoid / defend against racing with cache evictions
+	 */
+	va_mapping_size = ALIGNED_UP((dlme_end - dlme_start), DRTM_PAGE_SIZE);
+	rc = mmap_add_dynamic_region_alloc_va(dlme_img_start, &va_mapping, va_mapping_size,
+					      MT_MEMORY | MT_NS | MT_RO |
+					      MT_SHAREABILITY_ISH);
+	if (rc != 0) {
+		ERROR("DRTM: %s: mmap_add_dynamic_region_alloc_va() failed rc=%d\n",
+		      __func__, rc);
+		return INTERNAL_ERROR;
+	}
+	flush_dcache_range(va_mapping, va_mapping_size);
+
+	rc = mmap_remove_dynamic_region(va_mapping, va_mapping_size);
+	if (rc) {
+		ERROR("%s(): mmap_remove_dynamic_region() failed unexpectedly"
+		      " rc=%d\n", __func__, rc);
+		panic();
+	}
+
+	*a_out = *a;
+	return SUCCESS;
+}
+
+static void drtm_dl_reset_dlme_el_state(enum drtm_dlme_el dlme_el)
+{
+	uint64_t sctlr;
+
+	/*
+	 * TODO: Set PE state according to the PSCI's specification of the initial
+	 * state after CPU_ON, or to reset values if unspecified, where they exist,
+	 * or define sensible values otherwise.
+	 */
+
+	switch (dlme_el) {
+	case DLME_AT_EL1:
+		sctlr = read_sctlr_el1();
+		break;
+
+	case DLME_AT_EL2:
+		sctlr = read_sctlr_el2();
+		break;
+
+	default: /* Not reached */
+		ERROR("%s(): dlme_el has the unexpected value %d\n",
+		      __func__, dlme_el);
+		panic();
+	}
+
+	sctlr &= ~(/* Disable DLME's EL MMU, since the existing page-tables are untrusted. */
+		   SCTLR_M_BIT
+		   | SCTLR_EE_BIT               /* Little-endian data accesses. */
+		  );
+
+	sctlr |= SCTLR_C_BIT | SCTLR_I_BIT; /* Allow instruction and data caching. */
+
+	switch (dlme_el) {
+	case DLME_AT_EL1:
+		write_sctlr_el1(sctlr);
+		break;
+
+	case DLME_AT_EL2:
+		write_sctlr_el2(sctlr);
+		break;
+	}
+}
+
+static void drtm_dl_reset_dlme_context(enum drtm_dlme_el dlme_el)
+{
+	void *ns_ctx = cm_get_context(NON_SECURE);
+	gp_regs_t *gpregs = get_gpregs_ctx(ns_ctx);
+	uint64_t spsr_el3 = read_ctx_reg(get_el3state_ctx(ns_ctx), CTX_SPSR_EL3);
+
+	/* Reset all gpregs, including SP_EL0. */
+	memset(gpregs, 0, sizeof(*gpregs));
+
+	/* Reset SP_ELx. */
+	switch (dlme_el) {
+	case DLME_AT_EL1:
+		write_sp_el1(0);
+		break;
+
+	case DLME_AT_EL2:
+		write_sp_el2(0);
+		break;
+	}
+
+	/*
+	 * DLME's async exceptions are masked to avoid a NWd attacker's timed
+	 * interference with any state we established trust in or measured.
+	 */
+	spsr_el3 |= SPSR_DAIF_MASK << SPSR_DAIF_SHIFT;
+
+	write_ctx_reg(get_el3state_ctx(ns_ctx), CTX_SPSR_EL3, spsr_el3);
+}
+
+static void drtm_dl_prepare_eret_to_dlme(const struct_drtm_dl_args *args, enum drtm_dlme_el dlme_el)
+{
+	void *ctx = cm_get_context(NON_SECURE);
+	uint64_t dlme_ep = DL_ARGS_GET_DLME_ENTRY_POINT(args);
+	uint64_t spsr_el3 = read_ctx_reg(get_el3state_ctx(ctx), CTX_SPSR_EL3);
+
+	/* Next ERET is to the DLME's EL. */
+	spsr_el3 &= ~(MODE_EL_MASK << MODE_EL_SHIFT);
+	switch (dlme_el) {
+	case DLME_AT_EL1:
+		spsr_el3 |= MODE_EL1 << MODE_EL_SHIFT;
+		break;
+
+	case DLME_AT_EL2:
+		spsr_el3 |= MODE_EL2 << MODE_EL_SHIFT;
+		break;
+	}
+
+	/* Next ERET is to the DLME entry point. */
+	cm_set_elr_spsr_el3(NON_SECURE, dlme_ep, spsr_el3);
+}
+
+static uint64_t drtm_dynamic_launch(uint64_t x1, void *handle)
+{
+	enum drtm_retc ret = SUCCESS;
+	enum drtm_retc dma_prot_ret;
+	struct_drtm_dl_args args;
+	/* DLME should be highest NS exception level */
+	enum drtm_dlme_el dlme_el = (el_implemented(2) != EL_IMPL_NONE) ? MODE_EL2 : MODE_EL1;
+
+	/* Ensure that only boot PE is powered on */
+	ret = drtm_dl_check_cores();
+	if (ret != SUCCESS) {
+		SMC_RET1(handle, ret);
+	}
+
+	/*
+	 * Ensure that execution state is AArch64 and the caller
+	 * is highest non-secure exception level
+	 */
+	ret = drtm_dl_check_caller_el(handle);
+	if (ret != SUCCESS) {
+		SMC_RET1(handle, ret);
+	}
+
+	ret = drtm_dl_check_args(x1, &args);
+	if (ret != SUCCESS) {
+		SMC_RET1(handle, ret);
+	}
+
+	/* Ensure that there are no SDEI event registered */
+#if SDEI_SUPPORT
+	if (sdei_get_registered_event_count() != 0) {
+		SMC_RET1(handle, DENIED);
+	}
+#endif /* SDEI_SUPPORT */
+
+	/*
+	 * Engage the DMA protections.  The launch cannot proceed without the DMA
+	 * protections due to potential TOC/TOU vulnerabilities w.r.t. the DLME
+	 * region (and to the NWd DCE region).
+	 */
+	ret = drtm_dma_prot_engage(&args.dma_prot_args,
+				   DL_ARGS_GET_DMA_PROT_TYPE(&args));
+	if (ret != SUCCESS) {
+		SMC_RET1(handle, ret);
+	}
+
+	/*
+	 * The DMA protection is now engaged.  Note that any failure mode that
+	 * returns an error to the DRTM-launch caller must now disengage DMA
+	 * protections before returning to the caller.
+	 */
+
+	ret = drtm_take_measurements(&args);
+	if (ret != SUCCESS) {
+		goto err_undo_dma_prot;
+	}
+
+	ret = drtm_dl_prepare_dlme_data(&args);
+	if (ret != SUCCESS) {
+		goto err_undo_dma_prot;
+	}
+
+	/*
+	 * Note that, at the time of writing, the DRTM spec allows a successful
+	 * launch from NS-EL1 to return to a DLME in NS-EL2.  The practical risk
+	 * of a privilege escalation, e.g. due to a compromised hypervisor, is
+	 * considered small enough not to warrant the specification of additional
+	 * DRTM conduits that would be necessary to maintain OSs' abstraction from
+	 * the presence of EL2 were the dynamic launch only be allowed from the
+	 * highest NS EL.
+	 */
+
+	dlme_el = (el_implemented(2) != EL_IMPL_NONE) ? MODE_EL2 : MODE_EL1;
+
+	drtm_dl_reset_dlme_el_state(dlme_el);
+	drtm_dl_reset_dlme_context(dlme_el);
+
+	drtm_dl_prepare_eret_to_dlme(&args, dlme_el);
+
+	/*
+	 * As per DRTM beta0 spec table #28 invalidate the instruction cache
+	 * before jumping to the DLME. This is required to defend against
+	 * potentially-malicious cache contents.
+	 */
+	invalidate_icache_all();
+
+	/* Return the DLME region's address in x0, and the DLME data offset in x1.*/
+	SMC_RET2(handle, args.dlme_paddr, args.dlme_data_off);
+
+err_undo_dma_prot:
+	dma_prot_ret = drtm_dma_prot_disengage();
+	if (dma_prot_ret != SUCCESS) {
+		ERROR("%s(): drtm_dma_prot_disengage() failed unexpectedly"
+		      " rc=%d\n", __func__, ret);
+		panic();
+	}
+
+	SMC_RET1(handle, ret);
+}
+
+uint64_t drtm_smc_handler(uint32_t smc_fid,
+			  uint64_t x1,
+			  uint64_t x2,
+			  uint64_t x3,
+			  uint64_t x4,
+			  void *cookie,
+			  void *handle,
+			  uint64_t flags)
+{
+	/* Check that the SMC call is from the Normal World. */
+	if (!is_caller_non_secure(flags)) {
+		SMC_RET1(handle, NOT_SUPPORTED);
+	}
+
+	switch (smc_fid) {
+	case ARM_DRTM_SVC_VERSION:
+		INFO("DRTM service handler: version\n");
+		/* Return the version of current implementation */
+		SMC_RET1(handle, ARM_DRTM_VERSION);
+		break;	/* not reached */
+
+	case ARM_DRTM_SVC_FEATURES:
+		if (((x1 >> ARM_DRTM_FUNC_SHIFT) & ARM_DRTM_FUNC_MASK) ==
+		    ARM_DRTM_FUNC_ID) {
+			/* Dispatch function-based queries. */
+			switch (x1 & FUNCID_MASK) {
+			case ARM_DRTM_SVC_VERSION:
+				SMC_RET1(handle, SUCCESS);
+				break;	/* not reached */
+
+			case ARM_DRTM_SVC_FEATURES:
+				SMC_RET1(handle, SUCCESS);
+				break;	/* not reached */
+
+			case ARM_DRTM_SVC_UNPROTECT_MEM:
+				SMC_RET1(handle, SUCCESS);
+				break;	/* not reached */
+
+			case ARM_DRTM_SVC_DYNAMIC_LAUNCH:
+				SMC_RET1(handle, SUCCESS);
+				break;	/* not reached */
+
+			case ARM_DRTM_SVC_CLOSE_LOCALITY:
+				WARN("ARM_DRTM_SVC_CLOSE_LOCALITY feature %s",
+				     "is not supported\n");
+				SMC_RET1(handle, NOT_SUPPORTED);
+				break;	/* not reached */
+
+			case ARM_DRTM_SVC_GET_ERROR:
+				SMC_RET1(handle, SUCCESS);
+				break;	/* not reached */
+
+			case ARM_DRTM_SVC_SET_ERROR:
+				SMC_RET1(handle, SUCCESS);
+				break;	/* not reached */
+
+			case ARM_DRTM_SVC_SET_TCB_HASH:
+				WARN("ARM_DRTM_SVC_TCB_HASH feature %s",
+				     "is not supported\n");
+				SMC_RET1(handle, NOT_SUPPORTED);
+				break;	/* not reached */
+
+			case ARM_DRTM_SVC_LOCK_TCB_HASH:
+				WARN("ARM_DRTM_SVC_LOCK_TCB_HASH feature %s",
+				     "is not supported\n");
+				SMC_RET1(handle, NOT_SUPPORTED);
+				break;	/* not reached */
+
+			default:
+				ERROR("Unknown DRTM service function\n");
+				SMC_RET1(handle, NOT_SUPPORTED);
+				break;	/* not reached */
+			}
+		} else {
+			/* Dispatch feature-based queries. */
+			switch (x1 & ARM_DRTM_FEAT_ID_MASK) {
+			case ARM_DRTM_FEATURES_TPM:
+				INFO("++ DRTM service handler: TPM features\n");
+				return drtm_features_tpm(handle);
+				break;	/* not reached */
+
+			case ARM_DRTM_FEATURES_MEM_REQ:
+				INFO("++ DRTM service handler: Min. mem."
+				     " requirement features\n");
+				return drtm_features_mem_req(handle);
+				break;	/* not reached */
+
+			case ARM_DRTM_FEATURES_DMA_PROT:
+				INFO("++ DRTM service handler: "
+				     "DMA protection features\n");
+				return drtm_features_dma_prot(handle);
+				break;	/* not reached */
+
+			case ARM_DRTM_FEATURES_BOOT_PE_ID:
+				INFO("++ DRTM service handler: "
+				     "Boot PE ID features\n");
+				return drtm_features_boot_pe_id(handle);
+				break;	/* not reached */
+
+			case ARM_DRTM_FEATURES_TCB_HASHES:
+				INFO("++ DRTM service handler: "
+				     "TCB-hashes features\n");
+				return drtm_features_tcb_hashes(handle);
+				break;	/* not reached */
+
+			default:
+				ERROR("Unknown ARM DRTM service feature\n");
+				SMC_RET1(handle, NOT_SUPPORTED);
+				break;	/* not reached */
+			}
+		}
+
+	case ARM_DRTM_SVC_UNPROTECT_MEM:
+		INFO("DRTM service handler: unprotect mem\n");
+		return drtm_unprotect_mem(handle);
+		break;	/* not reached */
+
+	case ARM_DRTM_SVC_DYNAMIC_LAUNCH:
+		INFO("DRTM service handler: dynamic launch\n");
+		return drtm_dynamic_launch(x1, handle);
+		break;	/* not reached */
+
+	case ARM_DRTM_SVC_CLOSE_LOCALITY:
+		WARN("DRTM service handler: close locality %s\n",
+		     "is not supported");
+		SMC_RET1(handle, NOT_SUPPORTED);
+		break;	/* not reached */
+
+	case ARM_DRTM_SVC_GET_ERROR:
+		INFO("DRTM service handler: get error\n");
+		drtm_get_error(handle);
+		break;	/* not reached */
+
+	case ARM_DRTM_SVC_SET_ERROR:
+		INFO("DRTM service handler: set error\n");
+		drtm_set_error(x1, handle);
+		break;	/* not reached */
+
+	case ARM_DRTM_SVC_SET_TCB_HASH:
+		WARN("DRTM service handler: set TCB hash %s\n",
+		     "is not supported");
+		SMC_RET1(handle, NOT_SUPPORTED);
+		break;  /* not reached */
+
+	case ARM_DRTM_SVC_LOCK_TCB_HASH:
+		WARN("DRTM service handler: lock TCB hash %s\n",
+		     "is not supported");
+		SMC_RET1(handle, NOT_SUPPORTED);
+		break;  /* not reached */
+
+	default:
+		ERROR("Unknown DRTM service function: 0x%x\n", smc_fid);
+		SMC_RET1(handle, SMC_UNK);
+		break;	/* not reached */
+	}
+
+	/* not reached */
+	SMC_RET1(handle, SMC_UNK);
+}
diff --git a/services/std_svc/drtm/drtm_main.h b/services/std_svc/drtm/drtm_main.h
new file mode 100644
index 0000000..baa37ae
--- /dev/null
+++ b/services/std_svc/drtm/drtm_main.h
@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ */
+#ifndef DRTM_MAIN_H
+#define DRTM_MAIN_H
+
+#include <stdint.h>
+
+#include <assert.h>
+#include <lib/smccc.h>
+
+#include "drtm_dma_prot.h"
+
+#define ALIGNED_UP(x, a) __extension__ ({ \
+	__typeof__(a) _a = (a); \
+	__typeof__(a) _one = 1; \
+	assert(IS_POWER_OF_TWO(_a)); \
+	((x) + (_a - _one)) & ~(_a - _one); \
+})
+
+#define ALIGNED_DOWN(x, a) __extension__ ({ \
+	__typeof__(a) _a = (a); \
+	__typeof__(a) _one = 1; \
+	assert(IS_POWER_OF_TWO(_a)); \
+	(x) & ~(_a - _one); \
+})
+
+#define DRTM_PAGE_SIZE		(4 * (1 << 10))
+#define DRTM_PAGE_SIZE_STR	"4-KiB"
+
+#define DL_ARGS_GET_DMA_PROT_TYPE(a)    (((a)->features >> 3) & 0x7U)
+#define DL_ARGS_GET_PCR_SCHEMA(a)	(((a)->features >> 1) & 0x3U)
+#define DL_ARGS_GET_DLME_ENTRY_POINT(a)	\
+		(((a)->dlme_paddr + (a)->dlme_img_off + (a)->dlme_img_ep_off))
+
+enum drtm_dlme_el {
+	DLME_AT_EL1 = MODE_EL1,
+	DLME_AT_EL2 = MODE_EL2
+};
+
+enum drtm_retc {
+	SUCCESS = SMC_OK,
+	NOT_SUPPORTED = SMC_UNK,
+	INVALID_PARAMETERS = -2,
+	DENIED = -3,
+	NOT_FOUND = -4,
+	INTERNAL_ERROR = -5,
+	MEM_PROTECT_INVALID = -6,
+};
+
+typedef struct {
+	uint64_t tpm_features;
+	uint64_t minimum_memory_requirement;
+	uint64_t dma_prot_features;
+	uint64_t boot_pe_id;
+	uint64_t tcb_hash_features;
+} drtm_features_t;
+
+struct __packed drtm_dl_args_v1 {
+	uint16_t version;	/* Must be 1. */
+	uint8_t __res[2];
+	uint32_t features;
+	uint64_t dlme_paddr;
+	uint64_t dlme_size;
+	uint64_t dlme_img_off;
+	uint64_t dlme_img_ep_off;
+	uint64_t dlme_img_size;
+	uint64_t dlme_data_off;
+	uint64_t dce_nwd_paddr;
+	uint64_t dce_nwd_size;
+	drtm_dl_dma_prot_args_v1_t dma_prot_args;
+} __aligned(__alignof(uint16_t /* First member's type, `uint16_t version' */));
+
+struct __packed dlme_data_header_v1 {
+	uint16_t version;	/* Must be 1. */
+	uint16_t this_hdr_size;
+	uint8_t __res[4];
+	uint64_t dlme_data_size;
+	uint64_t dlme_prot_regions_size;
+	uint64_t dlme_addr_map_size;
+	uint64_t dlme_tpm_log_size;
+	uint64_t dlme_tcb_hashes_table_size;
+	uint64_t dlme_impdef_region_size;
+} __aligned(__alignof(uint16_t /* First member's type, `uint16_t version'. */));
+
+typedef struct dlme_data_header_v1 struct_dlme_data_header;
+
+drtm_memory_region_descriptor_table_t *drtm_build_address_map(void);
+uint64_t drtm_get_address_map_size(void);
+
+/*
+ * Version-independent type.  May be used to avoid excessive line of code
+ * changes when migrating to new struct versions.
+ */
+typedef struct drtm_dl_args_v1 struct_drtm_dl_args;
+
+#endif /* DRTM_MAIN_H */
diff --git a/services/std_svc/drtm/drtm_measurements.c b/services/std_svc/drtm/drtm_measurements.c
new file mode 100644
index 0000000..a8f2b32
--- /dev/null
+++ b/services/std_svc/drtm/drtm_measurements.c
@@ -0,0 +1,214 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ * DRTM measurements into TPM PCRs.
+ *
+ * Authors:
+ *      Lucian Paul-Trifu <lucian.paultrifu@gmail.com>
+ *
+ */
+#include <assert.h>
+
+#include <common/debug.h>
+#include <drivers/auth/crypto_mod.h>
+#include <drivers/measured_boot/event_log/event_log.h>
+#include "drtm_main.h"
+#include "drtm_measurements.h"
+#include <lib/xlat_tables/xlat_tables_v2.h>
+
+/* Event Log buffer */
+static uint8_t drtm_event_log[PLAT_DRTM_EVENT_LOG_MAX_SIZE];
+
+/*
+ * Calculate and write hash of various payloads as per DRTM specification
+ * to Event Log.
+ *
+ * @param[in] data_base         Address of data
+ * @param[in] data_size         Size of data
+ * @param[in] event_type        Type of Event
+ * @param[in] event_name        Name of the Event
+ * @return:
+ *      0 = success
+ *    < 0 = error
+ */
+static int drtm_event_log_measure_and_record(uintptr_t data_base,
+					     uint32_t data_size,
+					     uint32_t event_type,
+					     const char *event_name,
+					     unsigned int pcr)
+{
+	int rc;
+	unsigned char hash_data[CRYPTO_MD_MAX_SIZE];
+	event_log_metadata_t metadata = {0};
+
+	metadata.name = event_name;
+	metadata.pcr = pcr;
+
+	/*
+	 * Measure the payloads requested by D-CRTM and DCE commponents
+	 * Hash algorithm decided by the Event Log driver at build-time
+	 */
+	rc = event_log_measure(data_base, data_size, hash_data);
+	if (rc != 0) {
+		return rc;
+	}
+
+	/* Record the mesasurement in the EventLog buffer */
+	event_log_record(hash_data, event_type, &metadata);
+
+	return 0;
+}
+
+/*
+ * Initialise Event Log global variables, used during the recording
+ * of various payload measurements into the Event Log buffer
+ *
+ * @param[in] event_log_start           Base address of Event Log buffer
+ * @param[in] event_log_finish          End address of Event Log buffer,
+ *                                      it is a first byte past end of the
+ *                                      buffer
+ */
+static void drtm_event_log_init(uint8_t *event_log_start,
+				uint8_t *event_log_finish)
+{
+	event_log_buf_init(event_log_start, event_log_finish);
+	event_log_write_specid_event();
+}
+
+enum drtm_retc drtm_take_measurements(const struct_drtm_dl_args *a)
+{
+	int rc;
+	uintptr_t dlme_img_mapping;
+	uint64_t dlme_img_ep;
+	size_t dlme_img_mapping_bytes;
+	uint8_t drtm_null_data = 0U;
+	uint8_t pcr_schema = DL_ARGS_GET_PCR_SCHEMA(a);
+	const char *drtm_event_arm_sep_data = "ARM_DRTM";
+
+	/* Initialise the EventLog driver */
+	drtm_event_log_init(drtm_event_log, drtm_event_log +
+			    sizeof(drtm_event_log));
+
+	/**
+	 * Measurements extended into PCR-17.
+	 *
+	 * PCR-17: Measure the DCE image.  Extend digest of (char)0 into PCR-17
+	 * since the D-CRTM and the DCE are not separate.
+	 */
+	rc = drtm_event_log_measure_and_record((uintptr_t)&drtm_null_data,
+					       sizeof(drtm_null_data),
+					       DRTM_EVENT_ARM_DCE, NULL,
+					       PCR_17);
+	CHECK_RC(rc, drtm_event_log_measure_and_record(DRTM_EVENT_ARM_DCE));
+
+	/* PCR-17: Measure the PCR schema DRTM launch argument. */
+	rc = drtm_event_log_measure_and_record((uintptr_t)&pcr_schema,
+					       sizeof(pcr_schema),
+					       DRTM_EVENT_ARM_PCR_SCHEMA,
+					       NULL, PCR_17);
+	CHECK_RC(rc,
+		 drtm_event_log_measure_and_record(DRTM_EVENT_ARM_PCR_SCHEMA));
+
+	/* PCR-17: Measure the enable state of external-debug, and trace. */
+	/*
+	 * TODO: Measure the enable state of external-debug and trace.  This should
+	 * be returned through a platform-specific hook.
+	 */
+
+	/* PCR-17: Measure the security lifecycle state. */
+	/*
+	 * TODO: Measure the security lifecycle state.  This is an implementation-
+	 * defined value, retrieved through an implementation-defined mechanisms.
+	 */
+
+	/*
+	 * PCR-17: Optionally measure the NWd DCE.
+	 * It is expected that such subsequent DCE stages are signed and verified.
+	 * Whether they are measured in addition to signing is implementation
+	 * -defined.
+	 * Here the choice is to not measure any NWd DCE, in favour of PCR value
+	 * resilience to any NWd DCE updates.
+	 */
+
+	/* PCR-17: End of DCE measurements. */
+	rc = drtm_event_log_measure_and_record((uintptr_t)drtm_event_arm_sep_data,
+					       strlen(drtm_event_arm_sep_data),
+					       DRTM_EVENT_ARM_SEPARATOR, NULL,
+					       PCR_17);
+	CHECK_RC(rc, drtm_event_log_measure_and_record(DRTM_EVENT_ARM_SEPARATOR));
+
+	/**
+	 * Measurements extended into PCR-18.
+	 *
+	 * PCR-18: Measure the PCR schema DRTM launch argument.
+	 */
+	rc = drtm_event_log_measure_and_record((uintptr_t)&pcr_schema,
+					       sizeof(pcr_schema),
+					       DRTM_EVENT_ARM_PCR_SCHEMA,
+					       NULL, PCR_18);
+	CHECK_RC(rc,
+		 drtm_event_log_measure_and_record(DRTM_EVENT_ARM_PCR_SCHEMA));
+
+	/*
+	 * PCR-18: Measure the public key used to verify DCE image(s) signatures.
+	 * Extend digest of (char)0, since we do not expect the NWd DCE to be
+	 * present.
+	 */
+	assert(a->dce_nwd_size == 0);
+	rc = drtm_event_log_measure_and_record((uintptr_t)&drtm_null_data,
+					       sizeof(drtm_null_data),
+					       DRTM_EVENT_ARM_DCE_PUBKEY,
+					       NULL, PCR_18);
+	CHECK_RC(rc,
+		 drtm_event_log_measure_and_record(DRTM_EVENT_ARM_DCE_PUBKEY));
+
+	/* PCR-18: Measure the DLME image. */
+	dlme_img_mapping_bytes = page_align(a->dlme_img_size, UP);
+	rc = mmap_add_dynamic_region_alloc_va(a->dlme_paddr + a->dlme_img_off,
+					      &dlme_img_mapping,
+					      dlme_img_mapping_bytes, MT_RO_DATA | MT_NS);
+	if (rc) {
+		WARN("DRTM: %s: mmap_add_dynamic_region() failed rc=%d\n",
+		     __func__, rc);
+		return INTERNAL_ERROR;
+	}
+
+	rc = drtm_event_log_measure_and_record(dlme_img_mapping, a->dlme_img_size,
+					       DRTM_EVENT_ARM_DLME, NULL,
+					       PCR_18);
+	CHECK_RC(rc, drtm_event_log_measure_and_record(DRTM_EVENT_ARM_DLME));
+
+	rc = mmap_remove_dynamic_region(dlme_img_mapping, dlme_img_mapping_bytes);
+	CHECK_RC(rc, mmap_remove_dynamic_region);
+
+	/* PCR-18: Measure the DLME image entry point. */
+	dlme_img_ep = DL_ARGS_GET_DLME_ENTRY_POINT(a);
+	drtm_event_log_measure_and_record((uintptr_t)&dlme_img_ep,
+					  sizeof(dlme_img_ep),
+					  DRTM_EVENT_ARM_DLME_EP, NULL,
+					  PCR_18);
+	CHECK_RC(rc, drtm_event_log_measure_and_record(DRTM_EVENT_ARM_DLME_EP));
+
+	/* PCR-18: End of DCE measurements. */
+	rc = drtm_event_log_measure_and_record((uintptr_t)drtm_event_arm_sep_data,
+					       strlen(drtm_event_arm_sep_data),
+					       DRTM_EVENT_ARM_SEPARATOR, NULL,
+					       PCR_18);
+	CHECK_RC(rc,
+		 drtm_event_log_measure_and_record(DRTM_EVENT_ARM_SEPARATOR));
+	/*
+	 * If the DCE is unable to log a measurement because there is no available
+	 * space in the event log region, the DCE must extend a hash of the value
+	 * 0xFF (1 byte in size) into PCR[17] and PCR[18] and enter remediation.
+	 */
+
+	return SUCCESS;
+}
+
+void drtm_serialise_event_log(uint8_t *dst, size_t *event_log_size_out)
+{
+	*event_log_size_out = event_log_get_cur_size(drtm_event_log);
+	memcpy(dst, drtm_event_log, *event_log_size_out);
+}
diff --git a/services/std_svc/drtm/drtm_measurements.h b/services/std_svc/drtm/drtm_measurements.h
new file mode 100644
index 0000000..6d7a84e
--- /dev/null
+++ b/services/std_svc/drtm/drtm_measurements.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ */
+#ifndef DRTM_MEASUREMENTS_H
+#define DRTM_MEASUREMENTS_H
+
+#include <stdint.h>
+
+#include "drtm_main.h"
+#include <platform_def.h>
+
+#define DRTM_EVENT_ARM_BASE		0x9000U
+#define DRTM_EVENT_TYPE(n)		(DRTM_EVENT_ARM_BASE + (unsigned int)(n))
+
+#define DRTM_EVENT_ARM_PCR_SCHEMA	DRTM_EVENT_TYPE(1)
+#define DRTM_EVENT_ARM_DCE		DRTM_EVENT_TYPE(2)
+#define DRTM_EVENT_ARM_DCE_PUBKEY	DRTM_EVENT_TYPE(3)
+#define DRTM_EVENT_ARM_DLME		DRTM_EVENT_TYPE(4)
+#define DRTM_EVENT_ARM_DLME_EP		DRTM_EVENT_TYPE(5)
+#define DRTM_EVENT_ARM_DEBUG_CONFIG	DRTM_EVENT_TYPE(6)
+#define DRTM_EVENT_ARM_NONSECURE_CONFIG	DRTM_EVENT_TYPE(7)
+#define DRTM_EVENT_ARM_DCE_SECONDARY	DRTM_EVENT_TYPE(8)
+#define DRTM_EVENT_ARM_TZFW		DRTM_EVENT_TYPE(9)
+#define DRTM_EVENT_ARM_SEPARATOR	DRTM_EVENT_TYPE(10)
+
+#define CHECK_RC(rc, func_call) { \
+	if (rc != 0) { \
+		ERROR("%s(): " #func_call "failed unexpectedly rc=%d\n",  \
+		      __func__, rc);  \
+		panic();  \
+	}  \
+}
+
+enum drtm_retc drtm_take_measurements(const struct_drtm_dl_args *a);
+void drtm_serialise_event_log(uint8_t *dst, size_t *event_log_size_out);
+
+#endif /* DRTM_MEASUREMENTS_H */
diff --git a/services/std_svc/drtm/drtm_remediation.c b/services/std_svc/drtm/drtm_remediation.c
new file mode 100644
index 0000000..696b4ea
--- /dev/null
+++ b/services/std_svc/drtm/drtm_remediation.c
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ * DRTM support for DRTM error remediation.
+ *
+ */
+#include <inttypes.h>
+#include <stdint.h>
+
+#include <common/debug.h>
+#include <common/runtime_svc.h>
+#include "drtm_main.h"
+#include <plat/common/platform.h>
+
+uint64_t drtm_set_error(uint64_t x1, void *ctx)
+{
+	int rc;
+
+	rc = plat_set_drtm_error(x1);
+
+	if (rc != 0) {
+		SMC_RET1(ctx, INTERNAL_ERROR);
+	}
+
+	SMC_RET1(ctx, SUCCESS);
+}
+
+uint64_t drtm_get_error(void *ctx)
+{
+	uint64_t error_code;
+	int rc;
+
+	rc = plat_get_drtm_error(&error_code);
+
+	if (rc != 0) {
+		SMC_RET1(ctx, INTERNAL_ERROR);
+	}
+
+	SMC_RET2(ctx, SUCCESS, error_code);
+}
+
+void drtm_enter_remediation(uint64_t err_code, const char *err_str)
+{
+	int rc = plat_set_drtm_error(err_code);
+
+	if (rc != 0) {
+		ERROR("%s(): drtm_error_set() failed unexpectedly rc=%d\n",
+		      __func__, rc);
+		panic();
+	}
+
+	ERROR("DRTM: entering remediation of error:\n%" PRIu64 "\t\'%s\'\n",
+	       err_code, err_str);
+
+	ERROR("%s(): system reset is not yet supported\n", __func__);
+	plat_system_reset();
+}
diff --git a/services/std_svc/drtm/drtm_remediation.h b/services/std_svc/drtm/drtm_remediation.h
new file mode 100644
index 0000000..8f965f1
--- /dev/null
+++ b/services/std_svc/drtm/drtm_remediation.h
@@ -0,0 +1,15 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ *
+ */
+#ifndef DRTM_REMEDIATION_H
+#define DRTM_REMEDIATION_H
+
+uint64_t drtm_set_error(uint64_t x1, void *ctx);
+uint64_t drtm_get_error(void *ctx);
+
+void drtm_enter_remediation(uint64_t error_code, const char *error_str);
+
+#endif /* DRTM_REMEDIATION_H */
diff --git a/services/std_svc/drtm/drtm_res_address_map.c b/services/std_svc/drtm/drtm_res_address_map.c
new file mode 100644
index 0000000..8636706
--- /dev/null
+++ b/services/std_svc/drtm/drtm_res_address_map.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2022 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier:    BSD-3-Clause
+ */
+
+#include <stdint.h>
+
+#include <plat/common/platform.h>
+#include <services/drtm_svc.h>
+#include <platform_def.h>
+
+/* Address map revision generated by this code. */
+#define DRTM_ADDRESS_MAP_REVISION	U(0x0001)
+
+/* Amount of space needed for address map based on PLAT_DRTM_MMAP_ENTRIES */
+#define DRTM_ADDRESS_MAP_SIZE (sizeof(drtm_memory_region_descriptor_table_t) + \
+			       (sizeof(drtm_mem_region_t) * \
+				PLAT_DRTM_MMAP_ENTRIES))
+
+/* Allocate space for DRTM-formatted address map to be constructed. */
+static uint8_t drtm_address_map[DRTM_ADDRESS_MAP_SIZE];
+
+static uint64_t drtm_address_map_size;
+
+drtm_memory_region_descriptor_table_t *drtm_build_address_map(void)
+{
+	/* Set up pointer to DRTM memory map. */
+	drtm_memory_region_descriptor_table_t *map =
+		(drtm_memory_region_descriptor_table_t *)drtm_address_map;
+
+	/* Get the platform memory map. */
+	const mmap_region_t *mmap = plat_get_addr_mmap();
+	unsigned int i;
+
+	/* Set up header for address map structure. */
+	map->revision = DRTM_ADDRESS_MAP_REVISION;
+	map->reserved = 0x0000;
+
+	/* Iterate through mmap and generate DRTM address map. */
+	for (i = 0U; mmap[i].base_pa != 0UL; i++) {
+		/* Set PA of region. */
+		map->region[i].region_address = mmap[i].base_pa;
+
+		/* Set size of region (in 4kb chunks). */
+		map->region[i].region_size_type = 0;
+		ARM_DRTM_REGION_SIZE_TYPE_SET_4K_PAGE_NUM(
+			map->region[i].region_size_type,
+			mmap[i].size / PAGE_SIZE_4KB);
+
+		/* Set type and cacheability. */
+		switch (MT_TYPE(mmap[i].attr)) {
+		case MT_DEVICE:
+			ARM_DRTM_REGION_SIZE_TYPE_SET_REGION_TYPE(
+				map->region[i].region_size_type,
+				ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_DEVICE);
+			break;
+		case MT_NON_CACHEABLE:
+			ARM_DRTM_REGION_SIZE_TYPE_SET_REGION_TYPE(
+				map->region[i].region_size_type,
+				ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_NCAR);
+			ARM_DRTM_REGION_SIZE_TYPE_SET_CACHEABILITY(
+				map->region[i].region_size_type,
+				ARM_DRTM_REGION_SIZE_TYPE_CACHEABILITY_NC);
+			break;
+		case MT_MEMORY:
+			ARM_DRTM_REGION_SIZE_TYPE_SET_REGION_TYPE(
+				map->region[i].region_size_type,
+				ARM_DRTM_REGION_SIZE_TYPE_REGION_TYPE_NORMAL);
+			break;
+		default:
+			return NULL;
+		}
+	}
+
+	map->num_regions = i;
+
+	/* Store total size of address map. */
+	drtm_address_map_size = sizeof(drtm_memory_region_descriptor_table_t);
+	drtm_address_map_size += (i * sizeof(drtm_mem_region_t));
+
+	return map;
+}
+
+uint64_t drtm_get_address_map_size(void)
+{
+	return drtm_address_map_size;
+}
diff --git a/services/std_svc/sdei/sdei_event.c b/services/std_svc/sdei/sdei_event.c
index 0b608e1..e0c7971 100644
--- a/services/std_svc/sdei/sdei_event.c
+++ b/services/std_svc/sdei/sdei_event.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2022, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -99,3 +99,24 @@
 
 	return NULL;
 }
+
+/*
+ * Return the total number of currently registered SDEI events.
+ */
+int sdei_get_registered_event_count(void)
+{
+	const sdei_mapping_t *mapping;
+	sdei_ev_map_t *map;
+	unsigned int i;
+	unsigned int j;
+	int count = 0;
+
+	/* Add up reg counts for each mapping. */
+	for_each_mapping_type(i, mapping) {
+		iterate_mapping(mapping, j, map) {
+			count += map->reg_count;
+		}
+	}
+
+	return count;
+}
diff --git a/services/std_svc/std_svc_setup.c b/services/std_svc/std_svc_setup.c
index b1e3db9..08d16e2 100644
--- a/services/std_svc/std_svc_setup.c
+++ b/services/std_svc/std_svc_setup.c
@@ -13,6 +13,7 @@
 #include <lib/pmf/pmf.h>
 #include <lib/psci/psci.h>
 #include <lib/runtime_instr.h>
+#include <services/drtm_svc.h>
 #include <services/pci_svc.h>
 #include <services/rmmd_svc.h>
 #include <services/sdei.h>
@@ -75,6 +76,12 @@
 
 	trng_setup();
 
+#if DRTM_SUPPORT
+	if (drtm_setup() != 0) {
+		ret = 1;
+	}
+#endif /* DRTM_SUPPORT */
+
 	return ret;
 }
 
@@ -186,6 +193,13 @@
 	}
 #endif
 
+#if DRTM_SUPPORT
+	if (is_drtm_fid(smc_fid)) {
+		return drtm_smc_handler(smc_fid, x1, x2, x3, x4, cookie, handle,
+					flags);
+	}
+#endif /* DRTM_SUPPORT */
+
 	switch (smc_fid) {
 	case ARM_STD_SVC_CALL_COUNT:
 		/*