hw/arm/microbit.c

   1 /*
   2  * BBC micro:bit machine
   3  * http://tech.microbit.org/hardware/
   4  *
   5  * Copyright 2018 Joel Stanley <joel@jms.id.au>
   6  *
   7  * This code is licensed under the GPL version 2 or later.  See
   8  * the COPYING file in the top-level directory.
   9  */
  10
  11 #include "qemu/osdep.h"
  12 #include "qapi/error.h"
  13 #include "hw/boards.h"
  14 #include "hw/arm/arm.h"
  15 #include "sysemu/sysemu.h"
  16 #include "exec/address-spaces.h"
  17
  18 #include "hw/arm/nrf51_soc.h"
  19
  20 typedef struct {
  21     MachineState parent;
  22
  23     NRF51State nrf51;
  24 } MicrobitMachineState;
  25
  26 #define TYPE_MICROBIT_MACHINE MACHINE_TYPE_NAME("microbit")
  27
  28 #define MICROBIT_MACHINE(obj) \
  29     OBJECT_CHECK(MicrobitMachineState, obj, TYPE_MICROBIT_MACHINE)
  30
  31 static void microbit_init(MachineState *machine)
  32 {
  33     MicrobitMachineState *s = MICROBIT_MACHINE(machine);
  34     MemoryRegion *system_memory = get_system_memory();
  35     Object *soc = OBJECT(&s->nrf51);
  36
  37     sysbus_init_child_obj(OBJECT(machine), "nrf51", soc, sizeof(s->nrf51),
  38                           TYPE_NRF51_SOC);
  39     qdev_prop_set_chr(DEVICE(&s->nrf51), "serial0", serial_hd(0));
  40     object_property_set_link(soc, OBJECT(system_memory), "memory",
  41                              &error_fatal);
  42     object_property_set_bool(soc, true, "realized", &error_fatal);
  43
  44     armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
  45                        NRF51_SOC(soc)->flash_size);
  46 }
  47
  48 static void microbit_machine_class_init(ObjectClass *oc, void *data)
  49 {
  50     MachineClass *mc = MACHINE_CLASS(oc);
  51
  52     mc->desc = "BBC micro:bit";
  53     mc->init = microbit_init;
  54     mc->max_cpus = 1;
  55 }
  56
  57 static const TypeInfo microbit_info = {
  58     .name = TYPE_MICROBIT_MACHINE,
  59     .parent = TYPE_MACHINE,
  60     .instance_size = sizeof(MicrobitMachineState),
  61     .class_init = microbit_machine_class_init,
  62 };
  63
  64 static void microbit_machine_init(void)
  65 {
  66     type_register_static(&microbit_info);
  67 }
  68
  69 type_init(microbit_machine_init);