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/boot.h"
15#include "sysemu/sysemu.h"
16#include "exec/address-spaces.h"
17
18#include "hw/arm/nrf51_soc.h"
19#include "hw/i2c/microbit_i2c.h"
20#include "hw/qdev-properties.h"
21
22typedef struct {
23 MachineState parent;
24
25 NRF51State nrf51;
26 MicrobitI2CState i2c;
27} MicrobitMachineState;
28
29#define TYPE_MICROBIT_MACHINE MACHINE_TYPE_NAME("microbit")
30
31#define MICROBIT_MACHINE(obj) \
32 OBJECT_CHECK(MicrobitMachineState, obj, TYPE_MICROBIT_MACHINE)
33
34static void microbit_init(MachineState *machine)
35{
36 MicrobitMachineState *s = MICROBIT_MACHINE(machine);
37 MemoryRegion *system_memory = get_system_memory();
38 MemoryRegion *mr;
39 Object *soc = OBJECT(&s->nrf51);
40 Object *i2c = OBJECT(&s->i2c);
41
42 sysbus_init_child_obj(OBJECT(machine), "nrf51", soc, sizeof(s->nrf51),
43 TYPE_NRF51_SOC);
44 qdev_prop_set_chr(DEVICE(&s->nrf51), "serial0", serial_hd(0));
45 object_property_set_link(soc, OBJECT(system_memory), "memory",
46 &error_fatal);
47 object_property_set_bool(soc, true, "realized", &error_fatal);
48
49 /*
50 * Overlap the TWI stub device into the SoC. This is a microbit-specific
51 * hack until we implement the nRF51 TWI controller properly and the
52 * magnetometer/accelerometer devices.
53 */
54 sysbus_init_child_obj(OBJECT(machine), "microbit.twi", i2c,
55 sizeof(s->i2c), TYPE_MICROBIT_I2C);
56 object_property_set_bool(i2c, true, "realized", &error_fatal);
57 mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(i2c), 0);
58 memory_region_add_subregion_overlap(&s->nrf51.container, NRF51_TWI_BASE,
59 mr, -1);
60
61 armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
62 NRF51_SOC(soc)->flash_size);
63}
64
65static void microbit_machine_class_init(ObjectClass *oc, void *data)
66{
67 MachineClass *mc = MACHINE_CLASS(oc);
68
69 mc->desc = "BBC micro:bit";
70 mc->init = microbit_init;
71 mc->max_cpus = 1;
72}
73
74static const TypeInfo microbit_info = {
75 .name = TYPE_MICROBIT_MACHINE,
76 .parent = TYPE_MACHINE,
77 .instance_size = sizeof(MicrobitMachineState),
78 .class_init = microbit_machine_class_init,
79};
80
81static void microbit_machine_init(void)
82{
83 type_register_static(&microbit_info);
84}
85
86type_init(microbit_machine_init);
87