diff --git a/include/plat/arm/common/arm_def.h b/include/plat/arm/common/arm_def.h
index ea9d811..c499417 100644
--- a/include/plat/arm/common/arm_def.h
+++ b/include/plat/arm/common/arm_def.h
@@ -242,6 +242,17 @@
 						MT_MEMORY | MT_RW | MT_SECURE)
 
 /*
+ * Mapping for the BL1 RW region. This mapping is needed by BL2 in order to
+ * share the Mbed TLS heap. Since the heap is allocated inside BL1, it resides
+ * in the BL1 RW region. Hence, BL2 needs access to the BL1 RW region in order
+ * to be able to access the heap.
+ */
+#define ARM_MAP_BL1_RW		MAP_REGION_FLAT(	\
+					BL1_RW_BASE,	\
+					BL1_RW_LIMIT - BL1_RW_BASE, \
+					MT_MEMORY | MT_RW | MT_SECURE)
+
+/*
  * If SEPARATE_CODE_AND_RODATA=1 we define a region for each section
  * otherwise one region is defined containing both.
  */
diff --git a/include/plat/arm/common/arm_dyn_cfg_helpers.h b/include/plat/arm/common/arm_dyn_cfg_helpers.h
index 382ec60..cb17c95 100644
--- a/include/plat/arm/common/arm_dyn_cfg_helpers.h
+++ b/include/plat/arm/common/arm_dyn_cfg_helpers.h
@@ -6,12 +6,17 @@
 #ifndef __ARM_DYN_CFG_HELPERS_H__
 #define __ARM_DYN_CFG_HELPERS_H__
 
+#include <stddef.h>
 #include <stdint.h>
 
-/* Function declaration */
+/* Function declarations */
 int arm_dyn_get_config_load_info(void *dtb, int node, unsigned int config_id,
 		uint64_t *config_addr, uint32_t *config_size);
 int arm_dyn_tb_fw_cfg_init(void *dtb, int *node);
 int arm_dyn_get_disable_auth(void *dtb, int node, uint32_t *disable_auth);
+int arm_get_dtb_mbedtls_heap_info(void *dtb, void **heap_addr,
+	size_t *heap_size);
+int arm_set_dtb_mbedtls_heap_info(void *dtb, void *heap_addr,
+	size_t heap_size);
 
 #endif /* __ARM_DYN_CFG_HELPERS_H__ */
diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index 1af4dd1..0770c0e 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -223,6 +223,8 @@
 void arm_load_tb_fw_config(void);
 void arm_bl2_set_tb_cfg_addr(void *dtb);
 void arm_bl2_dyn_cfg_init(void);
+void arm_bl1_set_mbedtls_heap(void);
+int arm_get_mbedtls_heap(void **heap_addr, size_t *heap_size);
 
 /*
  * Mandatory functions required in ARM standard platforms