1 /* 2 * B-L475E-IOT01A Discovery Kit machine 3 * (B-L475E-IOT01A IoT Node) 4 * 5 * Copyright (c) 2023 Arnaud Minier <arnaud.minier@telecom-paris.fr> 6 * Copyright (c) 2023 Inès Varhol <ines.varhol@telecom-paris.fr> 7 * 8 * SPDX-License-Identifier: GPL-2.0-or-later 9 * 10 * This work is licensed under the terms of the GNU GPL, version 2 or later. 11 * See the COPYING file in the top-level directory. 12 * 13 * This work is heavily inspired by the netduinoplus2 by Alistair Francis. 14 * Original code is licensed under the MIT License: 15 * 16 * Copyright (c) 2014 Alistair Francis <alistair@alistair23.me> 17 */ 18 19 /* 20 * The reference used is the STMicroElectronics UM2153 User manual 21 * Discovery kit for IoT node, multi-channel communication with STM32L4. 22 * https://www.st.com/en/evaluation-tools/b-l475e-iot01a.html#documentation 23 */ 24 25 #include "qemu/osdep.h" 26 #include "qapi/error.h" 27 #include "hw/boards.h" 28 #include "hw/qdev-properties.h" 29 #include "hw/qdev-clock.h" 30 #include "qemu/error-report.h" 31 #include "hw/arm/stm32l4x5_soc.h" 32 #include "hw/arm/boot.h" 33 34 /* Main SYSCLK frequency in Hz (80MHz) */ 35 #define MAIN_SYSCLK_FREQ_HZ 80000000ULL 36 37 static void b_l475e_iot01a_init(MachineState *machine) 38 { 39 const Stm32l4x5SocClass *sc; 40 DeviceState *dev; 41 Clock *sysclk; 42 43 /* This clock doesn't need migration because it is fixed-frequency */ 44 sysclk = clock_new(OBJECT(machine), "SYSCLK"); 45 clock_set_hz(sysclk, MAIN_SYSCLK_FREQ_HZ); 46 47 dev = qdev_new(TYPE_STM32L4X5XG_SOC); 48 object_property_add_child(OBJECT(machine), "soc", OBJECT(dev)); 49 qdev_connect_clock_in(dev, "sysclk", sysclk); 50 sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal); 51 52 sc = STM32L4X5_SOC_GET_CLASS(dev); 53 armv7m_load_kernel(ARM_CPU(first_cpu), 54 machine->kernel_filename, 55 0, sc->flash_size); 56 } 57 58 static void b_l475e_iot01a_machine_init(MachineClass *mc) 59 { 60 static const char *machine_valid_cpu_types[] = { 61 ARM_CPU_TYPE_NAME("cortex-m4"), 62 NULL 63 }; 64 mc->desc = "B-L475E-IOT01A Discovery Kit (Cortex-M4)"; 65 mc->init = b_l475e_iot01a_init; 66 mc->valid_cpu_types = machine_valid_cpu_types; 67 68 /* SRAM pre-allocated as part of the SoC instantiation */ 69 mc->default_ram_size = 0; 70 } 71 72 DEFINE_MACHINE("b-l475e-iot01a", b_l475e_iot01a_machine_init) 73