[RFC PATCH 07/10] hw/avr: Add few Arduino boards

[Philippe Mathieu-Daudé]

Add famous Arduino boards:

- Arduino Duemilanove
- Arduino Mega

Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
 hw/avr/arduino.c     | 173 +++++++++++++++++++++++++++++++++++++++++++
 hw/avr/Makefile.objs |   1 +
 2 files changed, 174 insertions(+)
 create mode 100644 hw/avr/arduino.c

diff --git a/hw/avr/arduino.c b/hw/avr/arduino.c
new file mode 100644
index 0000000000..191193d614
--- /dev/null
+++ b/hw/avr/arduino.c
@@ -0,0 +1,173 @@
+/*
+ * QEMU Arduino boards
+ *
+ * Copyright (c) 2019 Philippe Mathieu-Daudé
+ *
+ * This work is licensed under the terms of the GNU GPLv2 or later.
+ * See the COPYING file in the top-level directory.
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+/* TODO: Implement the use of EXTRAM */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "qapi/error.h"
+#include "hw/boards.h"
+#include "hw/loader.h"
+#include "elf.h"
+#include "atmega.h"
+
+typedef struct ArduinoBoardConfig {
+    const char *name;
+    const char *desc;
+    const char *alias;
+    const char *mcu_type;
+    uint64_t xtal_hz;
+    size_t extram_size;
+    bool is_default;
+} ArduinoBoardConfig;
+
+static const ArduinoBoardConfig arduino_boards[] = {
+    {
+        /* https://www.arduino.cc/en/Main/ArduinoBoardDuemilanove */
+        .name       = MACHINE_TYPE_NAME("arduino-duemilanove"),
+        .desc       = "Arduino Duemilanove (ATmega168)",
+        .alias      = "2009",
+        .mcu_type    = TYPE_ATMEGA168,
+        .xtal_hz    = 16 * 1000 * 1000,
+    }, {
+        /* https://store.arduino.cc/arduino-uno-rev3 */
+        .name       = MACHINE_TYPE_NAME("arduino-uno"),
+        .desc       = "Arduino Duemilanove (ATmega328P)",
+        .alias      = "UNO",
+        .mcu_type    = TYPE_ATMEGA328,
+        .xtal_hz    = 16 * 1000 * 1000,
+    }, {
+        /* https://www.arduino.cc/en/Main/ArduinoBoardMega */
+        .name       = MACHINE_TYPE_NAME("arduino-mega"),
+        .desc       = "Arduino Mega (ATmega1280)",
+        .alias      = "MEGA",
+        .mcu_type    = TYPE_ATMEGA1280,
+        .xtal_hz    = 16 * 1000 * 1000,
+    }, {
+        /* https://store.arduino.cc/arduino-mega-2560-rev3 */
+        .name       = MACHINE_TYPE_NAME("arduino-mega-2560-v3"),
+        .desc       = "Arduino Mega 2560 (ATmega2560)",
+        .alias      = "MEGA2560",
+        .mcu_type    = TYPE_ATMEGA2560,
+        .xtal_hz    = 16 * 1000 * 1000, /* CSTCE16M0V53-R0 */
+        .is_default = true,
+    },
+};
+
+typedef struct ArduinoMachineState {
+    /*< private >*/
+    MachineState parent_obj;
+    /*< public >*/
+    AtmegaState mcu;
+    MemoryRegion extram;
+} ArduinoMachineState;
+
+typedef struct ArduinoMachineClass {
+    /*< private >*/
+    MachineClass parent_class;
+    /*< public >*/
+    const ArduinoBoardConfig *config;
+} ArduinoMachineClass;
+
+#define TYPE_ARDUINO_MACHINE \
+        MACHINE_TYPE_NAME("arduino")
+#define ARDUINO_MACHINE(obj) \
+        OBJECT_CHECK(ArduinoMachineState, (obj), TYPE_ARDUINO_MACHINE)
+#define ARDUINO_MACHINE_CLASS(klass) \
+        OBJECT_CLASS_CHECK(ArduinoMachineClass, (klass), TYPE_ARDUINO_MACHINE)
+#define ARDUINO_MACHINE_GET_CLASS(obj) \
+        OBJECT_GET_CLASS(ArduinoMachineClass, (obj), TYPE_ARDUINO_MACHINE)
+
+static void load_firmware(const char *firmware, uint64_t flash_size)
+{
+    const char *filename;
+    int bytes_loaded;
+
+    /* Load firmware (contents of flash) trying to auto-detect format */
+    filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, firmware);
+    if (filename == NULL) {
+        error_report("Unable to find %s", firmware);
+        exit(1);
+    }
+
+    bytes_loaded = load_elf(filename, NULL, NULL, NULL, NULL, NULL, NULL,
+                            0, EM_NONE, 0, 0);
+    if (bytes_loaded < 0) {
+        bytes_loaded = load_image_targphys(filename, OFFSET_CODE, flash_size);
+    }
+    if (bytes_loaded < 0) {
+        error_report("Unable to load firmware image %s as ELF or raw binary",
+                     firmware);
+        exit(1);
+    }
+}
+
+static void arduino_machine_init(MachineState *machine)
+{
+    ArduinoMachineClass *amc = ARDUINO_MACHINE_GET_CLASS(machine);
+    ArduinoMachineState *ams = ARDUINO_MACHINE(machine);
+
+    sysbus_init_child_obj(OBJECT(machine), "mcu", &ams->mcu, sizeof(ams->mcu),
+                          amc->config->mcu_type);
+    object_property_set_uint(OBJECT(&ams->mcu), amc->config->xtal_hz,
+                             "xtal-frequency-hz", &error_abort);
+    object_property_set_bool(OBJECT(&ams->mcu), true, "realized",
+                             &error_abort);
+
+    if (machine->firmware) {
+        load_firmware(machine->firmware, memory_region_size(&ams->mcu.flash));
+    }
+}
+
+static void arduino_machine_class_init(ObjectClass *oc, void *data)
+{
+    MachineClass *mc = MACHINE_CLASS(oc);
+    ArduinoMachineClass *amc = ARDUINO_MACHINE_CLASS(oc);
+    const ArduinoBoardConfig *cfg = data;
+
+    mc->desc = cfg->desc;
+    mc->alias = cfg->alias;
+    mc->init = arduino_machine_init;
+    mc->default_cpus = 1;
+    mc->min_cpus = mc->default_cpus;
+    mc->max_cpus = mc->default_cpus;
+    mc->no_floppy = 1;
+    mc->no_cdrom = 1;
+    mc->no_parallel = 1;
+    mc->is_default = cfg->is_default;
+    mc->default_ram_size = cfg->extram_size;
+    amc->config = cfg;
+}
+
+static const TypeInfo arduino_machine_type = {
+    .name = TYPE_ARDUINO_MACHINE,
+    .parent = TYPE_MACHINE,
+    .instance_size = sizeof(ArduinoMachineState),
+    .class_size = sizeof(ArduinoMachineClass),
+    .abstract = true,
+};
+
+static void arduino_machine_types(void)
+{
+    size_t i;
+
+    type_register_static(&arduino_machine_type);
+    for (i = 0; i < ARRAY_SIZE(arduino_boards); ++i) {
+        TypeInfo ti = {
+            .name       = arduino_boards[i].name,
+            .parent     = TYPE_ARDUINO_MACHINE,
+            .class_init = arduino_machine_class_init,
+            .class_data = (void *)&arduino_boards[i],
+        };
+        type_register(&ti);
+    }
+}
+
+type_init(arduino_machine_types)
diff --git a/hw/avr/Makefile.objs b/hw/avr/Makefile.objs
index 4b6b911820..39ee3c32b2 100644
--- a/hw/avr/Makefile.objs
+++ b/hw/avr/Makefile.objs
@@ -1,2 +1,3 @@
 obj-y += sample.o
 obj-y += atmega.o
+obj-y += arduino.o
-- 
2.21.0