diff --git a/include/plat/common/plat_drtm.h b/include/plat/common/plat_drtm.h
index 3c4e3d5..e9b8d6a 100644
--- a/include/plat/common/plat_drtm.h
+++ b/include/plat/common/plat_drtm.h
@@ -7,11 +7,57 @@
 #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);
 
 #endif /* PLAT_DRTM_H */