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Commit | Line | Data |
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b148ed46 JS |
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" | |
12ec8bd5 | 14 | #include "hw/arm/boot.h" |
b0014913 | 15 | #include "sysemu/sysemu.h" |
b148ed46 JS |
16 | #include "exec/address-spaces.h" |
17 | ||
18 | #include "hw/arm/nrf51_soc.h" | |
9d68bf56 | 19 | #include "hw/i2c/microbit_i2c.h" |
a27bd6c7 | 20 | #include "hw/qdev-properties.h" |
db1015e9 | 21 | #include "qom/object.h" |
b148ed46 | 22 | |
db1015e9 | 23 | struct MicrobitMachineState { |
b148ed46 JS |
24 | MachineState parent; |
25 | ||
26 | NRF51State nrf51; | |
9d68bf56 | 27 | MicrobitI2CState i2c; |
db1015e9 | 28 | }; |
b148ed46 JS |
29 | |
30 | #define TYPE_MICROBIT_MACHINE MACHINE_TYPE_NAME("microbit") | |
31 | ||
8063396b | 32 | OBJECT_DECLARE_SIMPLE_TYPE(MicrobitMachineState, MICROBIT_MACHINE) |
b148ed46 JS |
33 | |
34 | static void microbit_init(MachineState *machine) | |
35 | { | |
36 | MicrobitMachineState *s = MICROBIT_MACHINE(machine); | |
37 | MemoryRegion *system_memory = get_system_memory(); | |
9d68bf56 | 38 | MemoryRegion *mr; |
b148ed46 | 39 | |
5a147c8c MA |
40 | object_initialize_child(OBJECT(machine), "nrf51", &s->nrf51, |
41 | TYPE_NRF51_SOC); | |
b0014913 | 42 | qdev_prop_set_chr(DEVICE(&s->nrf51), "serial0", serial_hd(0)); |
5325cc34 MA |
43 | object_property_set_link(OBJECT(&s->nrf51), "memory", |
44 | OBJECT(system_memory), &error_fatal); | |
e9a82986 | 45 | sysbus_realize(SYS_BUS_DEVICE(&s->nrf51), &error_fatal); |
b148ed46 | 46 | |
9d68bf56 SG |
47 | /* |
48 | * Overlap the TWI stub device into the SoC. This is a microbit-specific | |
49 | * hack until we implement the nRF51 TWI controller properly and the | |
50 | * magnetometer/accelerometer devices. | |
51 | */ | |
5a147c8c MA |
52 | object_initialize_child(OBJECT(machine), "microbit.twi", &s->i2c, |
53 | TYPE_MICROBIT_I2C); | |
e9a82986 MA |
54 | sysbus_realize(SYS_BUS_DEVICE(&s->i2c), &error_fatal); |
55 | mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->i2c), 0); | |
9d68bf56 SG |
56 | memory_region_add_subregion_overlap(&s->nrf51.container, NRF51_TWI_BASE, |
57 | mr, -1); | |
58 | ||
b148ed46 | 59 | armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename, |
761c532a | 60 | 0, s->nrf51.flash_size); |
b148ed46 JS |
61 | } |
62 | ||
63 | static void microbit_machine_class_init(ObjectClass *oc, void *data) | |
64 | { | |
65 | MachineClass *mc = MACHINE_CLASS(oc); | |
66 | ||
fd8f71b9 | 67 | mc->desc = "BBC micro:bit (Cortex-M0)"; |
b148ed46 JS |
68 | mc->init = microbit_init; |
69 | mc->max_cpus = 1; | |
70 | } | |
71 | ||
72 | static const TypeInfo microbit_info = { | |
73 | .name = TYPE_MICROBIT_MACHINE, | |
74 | .parent = TYPE_MACHINE, | |
75 | .instance_size = sizeof(MicrobitMachineState), | |
76 | .class_init = microbit_machine_class_init, | |
77 | }; | |
78 | ||
79 | static void microbit_machine_init(void) | |
80 | { | |
81 | type_register_static(µbit_info); | |
82 | } | |
83 | ||
84 | type_init(microbit_machine_init); |