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 | |
22 | typedef 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 | |
34 | static 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 | |
65 | static 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 | |
74 | static 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 | |
81 | static void microbit_machine_init(void) |
82 | { |
83 | type_register_static(µbit_info); |
84 | } |
85 | |
86 | type_init(microbit_machine_init); |
87 | |