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diff --git a/include/hw/arm/stm32l4x5_soc.h b/include/hw/arm/stm32l4x5_soc.h
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+++ b/include/hw/arm/stm32l4x5_soc.h
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+/*
+ * STM32L4x5 SoC family
+ *
+ * Copyright (c) 2023 Arnaud Minier <arnaud.minier@telecom-paris.fr>
+ * Copyright (c) 2023 Inès Varhol <ines.varhol@telecom-paris.fr>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ * This work is heavily inspired by the stm32f405_soc by Alistair Francis.
+ * Original code is licensed under the MIT License:
+ *
+ * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
+ */
+
+/*
+ * The reference used is the STMicroElectronics RM0351 Reference manual
+ * for STM32L4x5 and STM32L4x6 advanced Arm ® -based 32-bit MCUs.
+ * https://www.st.com/en/microcontrollers-microprocessors/stm32l4x5/documentation.html
+ */
+
+#ifndef HW_ARM_STM32L4x5_SOC_H
+#define HW_ARM_STM32L4x5_SOC_H
+
+#include "exec/memory.h"
+#include "hw/arm/armv7m.h"
+#include "qom/object.h"
+
+#define TYPE_STM32L4X5_SOC "stm32l4x5-soc"
+#define TYPE_STM32L4X5XC_SOC "stm32l4x5xc-soc"
+#define TYPE_STM32L4X5XE_SOC "stm32l4x5xe-soc"
+#define TYPE_STM32L4X5XG_SOC "stm32l4x5xg-soc"
+OBJECT_DECLARE_TYPE(Stm32l4x5SocState, Stm32l4x5SocClass, STM32L4X5_SOC)
+
+struct Stm32l4x5SocState {
+    SysBusDevice parent_obj;
+
+    ARMv7MState armv7m;
+
+    MemoryRegion sram1;
+    MemoryRegion sram2;
+    MemoryRegion flash;
+    MemoryRegion flash_alias;
+
+    Clock *sysclk;
+    Clock *refclk;
+};
+
+struct Stm32l4x5SocClass {
+    SysBusDeviceClass parent_class;
+
+    size_t flash_size;
+};
+
+#endif