2 * BBC micro:bit machine
3 * http://tech.microbit.org/hardware/
5 * Copyright 2018 Joel Stanley <joel@jms.id.au>
7 * This code is licensed under the GPL version 2 or later. See
8 * the COPYING file in the top-level directory.
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"
18 #include "hw/arm/nrf51_soc.h"
19 #include "hw/i2c/microbit_i2c.h"
20 #include "hw/qdev-properties.h"
21 #include "qom/object.h"
23 struct MicrobitMachineState
{
29 typedef struct MicrobitMachineState MicrobitMachineState
;
31 #define TYPE_MICROBIT_MACHINE MACHINE_TYPE_NAME("microbit")
33 DECLARE_INSTANCE_CHECKER(MicrobitMachineState
, MICROBIT_MACHINE
,
34 TYPE_MICROBIT_MACHINE
)
36 static void microbit_init(MachineState
*machine
)
38 MicrobitMachineState
*s
= MICROBIT_MACHINE(machine
);
39 MemoryRegion
*system_memory
= get_system_memory();
42 object_initialize_child(OBJECT(machine
), "nrf51", &s
->nrf51
,
44 qdev_prop_set_chr(DEVICE(&s
->nrf51
), "serial0", serial_hd(0));
45 object_property_set_link(OBJECT(&s
->nrf51
), "memory",
46 OBJECT(system_memory
), &error_fatal
);
47 sysbus_realize(SYS_BUS_DEVICE(&s
->nrf51
), &error_fatal
);
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.
54 object_initialize_child(OBJECT(machine
), "microbit.twi", &s
->i2c
,
56 sysbus_realize(SYS_BUS_DEVICE(&s
->i2c
), &error_fatal
);
57 mr
= sysbus_mmio_get_region(SYS_BUS_DEVICE(&s
->i2c
), 0);
58 memory_region_add_subregion_overlap(&s
->nrf51
.container
, NRF51_TWI_BASE
,
61 armv7m_load_kernel(ARM_CPU(first_cpu
), machine
->kernel_filename
,
65 static void microbit_machine_class_init(ObjectClass
*oc
, void *data
)
67 MachineClass
*mc
= MACHINE_CLASS(oc
);
69 mc
->desc
= "BBC micro:bit";
70 mc
->init
= microbit_init
;
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
,
81 static void microbit_machine_init(void)
83 type_register_static(µbit_info
);
86 type_init(microbit_machine_init
);