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 "exec/address-spaces.h"
  16
  17 #include "hw/arm/nrf51_soc.h"
  18
  19 typedef struct {
  20     MachineState parent;
  21
  22     NRF51State nrf51;
  23 } MicrobitMachineState;
  24
  25 #define TYPE_MICROBIT_MACHINE MACHINE_TYPE_NAME("microbit")
  26
  27 #define MICROBIT_MACHINE(obj) \
  28     OBJECT_CHECK(MicrobitMachineState, obj, TYPE_MICROBIT_MACHINE)
  29
  30 static void microbit_init(MachineState *machine)
  31 {
  32     MicrobitMachineState *s = MICROBIT_MACHINE(machine);
  33     MemoryRegion *system_memory = get_system_memory();
  34     Object *soc = OBJECT(&s->nrf51);
  35
  36     sysbus_init_child_obj(OBJECT(machine), "nrf51", soc, sizeof(s->nrf51),
  37                           TYPE_NRF51_SOC);
  38     object_property_set_link(soc, OBJECT(system_memory), "memory",
  39                              &error_fatal);
  40     object_property_set_bool(soc, true, "realized", &error_fatal);
  41
  42     armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
  43                        NRF51_SOC(soc)->flash_size);
  44 }
  45
  46 static void microbit_machine_class_init(ObjectClass *oc, void *data)
  47 {
  48     MachineClass *mc = MACHINE_CLASS(oc);
  49
  50     mc->desc = "BBC micro:bit";
  51     mc->init = microbit_init;
  52     mc->max_cpus = 1;
  53 }
  54
  55 static const TypeInfo microbit_info = {
  56     .name = TYPE_MICROBIT_MACHINE,
  57     .parent = TYPE_MACHINE,
  58     .instance_size = sizeof(MicrobitMachineState),
  59     .class_init = microbit_machine_class_init,
  60 };
  61
  62 static void microbit_machine_init(void)
  63 {
  64     type_register_static(&microbit_info);
  65 }
  66
  67 type_init(microbit_machine_init);