diff --git a/plat/st/common/include/stm32mp_common.h b/plat/st/common/include/stm32mp_common.h
index a5316b6..54cfcfb 100644
--- a/plat/st/common/include/stm32mp_common.h
+++ b/plat/st/common/include/stm32mp_common.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018-2022, STMicroelectronics - All Rights Reserved
+ * Copyright (C) 2018-2023, STMicroelectronics - All Rights Reserved
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -113,12 +113,12 @@
 int stm32mp_map_ddr_non_cacheable(void);
 int stm32mp_unmap_ddr(void);
 
-/* Functions to save and get boot peripheral info */
-void stm32_save_boot_interface(uint32_t interface, uint32_t instance);
+/* Function to save boot info */
+void stm32_save_boot_info(boot_api_context_t *boot_context);
+/* Function to get boot peripheral info */
 void stm32_get_boot_interface(uint32_t *interface, uint32_t *instance);
-
-/* Functions to save and get boot authentication status and partition used */
-void stm32_save_boot_auth(uint32_t auth_status, uint32_t boot_partition);
+/* Function to get BOOT_MODE backup register address */
+uintptr_t stm32_get_bkpr_boot_mode_addr(void);
 
 #if PSA_FWU_SUPPORT
 void stm32mp1_fwu_set_boot_idx(void);
diff --git a/plat/st/common/stm32mp_common.c b/plat/st/common/stm32mp_common.c
index bb56bac..9b790c2 100644
--- a/plat/st/common/stm32mp_common.c
+++ b/plat/st/common/stm32mp_common.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2023, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -14,6 +14,7 @@
 #include <drivers/st/stm32_console.h>
 #include <drivers/st/stm32mp_clkfunc.h>
 #include <drivers/st/stm32mp_reset.h>
+#include <lib/mmio.h>
 #include <lib/smccc.h>
 #include <lib/xlat_tables/xlat_tables_v2.h>
 #include <plat/common/platform.h>
@@ -24,6 +25,15 @@
 #define HEADER_VERSION_MAJOR_MASK	GENMASK(23, 16)
 #define RESET_TIMEOUT_US_1MS		1000U
 
+#define BOOT_AUTH_MASK			GENMASK_32(23, 20)
+#define BOOT_AUTH_SHIFT			20
+#define BOOT_PART_MASK			GENMASK_32(19, 16)
+#define BOOT_PART_SHIFT			16
+#define BOOT_ITF_MASK			GENMASK_32(15, 12)
+#define BOOT_ITF_SHIFT			12
+#define BOOT_INST_MASK			GENMASK_32(11, 8)
+#define BOOT_INST_SHIFT			8
+
 static console_t console;
 
 uintptr_t plat_get_ns_image_entrypoint(void)
@@ -277,3 +287,55 @@
 {
 	return (int32_t)(stm32mp_get_chip_version() & SOC_ID_REV_MASK);
 }
+
+void stm32_save_boot_info(boot_api_context_t *boot_context)
+{
+	uint32_t auth_status;
+
+	assert(boot_context->boot_interface_instance <= (BOOT_INST_MASK >> BOOT_INST_SHIFT));
+	assert(boot_context->boot_interface_selected <= (BOOT_ITF_MASK >> BOOT_ITF_SHIFT));
+	assert(boot_context->boot_partition_used_toboot <= (BOOT_PART_MASK >> BOOT_PART_SHIFT));
+
+	switch (boot_context->auth_status) {
+	case BOOT_API_CTX_AUTH_NO:
+		auth_status = 0x0U;
+		break;
+
+	case BOOT_API_CTX_AUTH_SUCCESS:
+		auth_status = 0x2U;
+		break;
+
+	case BOOT_API_CTX_AUTH_FAILED:
+	default:
+		auth_status = 0x1U;
+		break;
+	}
+
+	clk_enable(TAMP_BKP_REG_CLK);
+
+	mmio_clrsetbits_32(stm32_get_bkpr_boot_mode_addr(),
+			   BOOT_ITF_MASK | BOOT_INST_MASK | BOOT_PART_MASK | BOOT_AUTH_MASK,
+			   (boot_context->boot_interface_instance << BOOT_INST_SHIFT) |
+			   (boot_context->boot_interface_selected << BOOT_ITF_SHIFT) |
+			   (boot_context->boot_partition_used_toboot << BOOT_PART_SHIFT) |
+			   (auth_status << BOOT_AUTH_SHIFT));
+
+	clk_disable(TAMP_BKP_REG_CLK);
+}
+
+void stm32_get_boot_interface(uint32_t *interface, uint32_t *instance)
+{
+	static uint32_t itf;
+
+	if (itf == 0U) {
+		clk_enable(TAMP_BKP_REG_CLK);
+
+		itf = mmio_read_32(stm32_get_bkpr_boot_mode_addr()) &
+		      (BOOT_ITF_MASK | BOOT_INST_MASK);
+
+		clk_disable(TAMP_BKP_REG_CLK);
+	}
+
+	*interface = (itf & BOOT_ITF_MASK) >> BOOT_ITF_SHIFT;
+	*instance = (itf & BOOT_INST_MASK) >> BOOT_INST_SHIFT;
+}