| 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/core/boards.h" |
| 14 | #include "hw/arm/boot.h" |
| 15 | #include "hw/arm/machines-qom.h" |
| 16 | #include "system/system.h" |
| 17 | #include "system/address-spaces.h" |
| 18 | |
| 19 | #include "hw/arm/nrf51_soc.h" |
| 20 | #include "hw/i2c/microbit_i2c.h" |
| 21 | #include "hw/core/qdev-properties.h" |
| 22 | #include "qom/object.h" |
| 23 | |
| 24 | struct MicrobitMachineState { |
| 25 | MachineState parent; |
| 26 | |
| 27 | NRF51State nrf51; |
| 28 | MicrobitI2CState i2c; |
| 29 | }; |
| 30 | |
| 31 | #define TYPE_MICROBIT_MACHINE MACHINE_TYPE_NAME("microbit") |
| 32 | |
| 33 | OBJECT_DECLARE_SIMPLE_TYPE(MicrobitMachineState, MICROBIT_MACHINE) |
| 34 | |
| 35 | static void microbit_init(MachineState *machine) |
| 36 | { |
| 37 | MicrobitMachineState *s = MICROBIT_MACHINE(machine); |
| 38 | MemoryRegion *system_memory = get_system_memory(); |
| 39 | MemoryRegion *mr; |
| 40 | |
| 41 | object_initialize_child(OBJECT(machine), "nrf51", &s->nrf51, |
| 42 | TYPE_NRF51_SOC); |
| 43 | qdev_prop_set_chr(DEVICE(&s->nrf51), "serial0", serial_hd(0)); |
| 44 | object_property_set_link(OBJECT(&s->nrf51), "memory", |
| 45 | OBJECT(system_memory), &error_fatal); |
| 46 | sysbus_realize(SYS_BUS_DEVICE(&s->nrf51), &error_fatal); |
| 47 | |
| 48 | /* |
| 49 | * Overlap the TWI stub device into the SoC. This is a microbit-specific |
| 50 | * hack until we implement the nRF51 TWI controller properly and the |
| 51 | * magnetometer/accelerometer devices. |
| 52 | */ |
| 53 | object_initialize_child(OBJECT(machine), "microbit.twi", &s->i2c, |
| 54 | TYPE_MICROBIT_I2C); |
| 55 | sysbus_realize(SYS_BUS_DEVICE(&s->i2c), &error_fatal); |
| 56 | mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->i2c), 0); |
| 57 | memory_region_add_subregion_overlap(&s->nrf51.container, NRF51_TWI_BASE, |
| 58 | mr, -1); |
| 59 | |
| 60 | armv7m_load_kernel(s->nrf51.armv7m.cpu, machine->kernel_filename, |
| 61 | 0, s->nrf51.flash_size); |
| 62 | } |
| 63 | |
| 64 | static void microbit_machine_class_init(ObjectClass *oc, const void *data) |
| 65 | { |
| 66 | MachineClass *mc = MACHINE_CLASS(oc); |
| 67 | |
| 68 | mc->desc = "BBC micro:bit (Cortex-M0)"; |
| 69 | mc->init = microbit_init; |
| 70 | mc->max_cpus = 1; |
| 71 | } |
| 72 | |
| 73 | static const TypeInfo microbit_info = { |
| 74 | .name = TYPE_MICROBIT_MACHINE, |
| 75 | .parent = TYPE_MACHINE, |
| 76 | .instance_size = sizeof(MicrobitMachineState), |
| 77 | .class_init = microbit_machine_class_init, |
| 78 | .interfaces = arm_machine_interfaces, |
| 79 | }; |
| 80 | |
| 81 | static void microbit_machine_init(void) |
| 82 | { |
| 83 | type_register_static(µbit_info); |
| 84 | } |
| 85 | |
| 86 | type_init(microbit_machine_init); |