mirror of https://gitee.com/openkylin/qemu.git
85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
/*
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* BBC micro:bit machine
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* http://tech.microbit.org/hardware/
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*
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* Copyright 2018 Joel Stanley <joel@jms.id.au>
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*
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* This code is licensed under the GPL version 2 or later. See
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* the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "hw/boards.h"
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#include "hw/arm/boot.h"
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#include "sysemu/sysemu.h"
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#include "exec/address-spaces.h"
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#include "hw/arm/nrf51_soc.h"
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#include "hw/i2c/microbit_i2c.h"
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#include "hw/qdev-properties.h"
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#include "qom/object.h"
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struct MicrobitMachineState {
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MachineState parent;
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NRF51State nrf51;
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MicrobitI2CState i2c;
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};
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#define TYPE_MICROBIT_MACHINE MACHINE_TYPE_NAME("microbit")
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OBJECT_DECLARE_SIMPLE_TYPE(MicrobitMachineState, MICROBIT_MACHINE)
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static void microbit_init(MachineState *machine)
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{
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MicrobitMachineState *s = MICROBIT_MACHINE(machine);
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MemoryRegion *system_memory = get_system_memory();
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MemoryRegion *mr;
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object_initialize_child(OBJECT(machine), "nrf51", &s->nrf51,
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TYPE_NRF51_SOC);
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qdev_prop_set_chr(DEVICE(&s->nrf51), "serial0", serial_hd(0));
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object_property_set_link(OBJECT(&s->nrf51), "memory",
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OBJECT(system_memory), &error_fatal);
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sysbus_realize(SYS_BUS_DEVICE(&s->nrf51), &error_fatal);
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/*
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* Overlap the TWI stub device into the SoC. This is a microbit-specific
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* hack until we implement the nRF51 TWI controller properly and the
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* magnetometer/accelerometer devices.
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*/
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object_initialize_child(OBJECT(machine), "microbit.twi", &s->i2c,
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TYPE_MICROBIT_I2C);
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sysbus_realize(SYS_BUS_DEVICE(&s->i2c), &error_fatal);
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mr = sysbus_mmio_get_region(SYS_BUS_DEVICE(&s->i2c), 0);
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memory_region_add_subregion_overlap(&s->nrf51.container, NRF51_TWI_BASE,
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mr, -1);
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armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
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s->nrf51.flash_size);
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}
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static void microbit_machine_class_init(ObjectClass *oc, void *data)
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{
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MachineClass *mc = MACHINE_CLASS(oc);
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mc->desc = "BBC micro:bit (Cortex-M0)";
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mc->init = microbit_init;
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mc->max_cpus = 1;
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}
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static const TypeInfo microbit_info = {
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.name = TYPE_MICROBIT_MACHINE,
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.parent = TYPE_MACHINE,
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.instance_size = sizeof(MicrobitMachineState),
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.class_init = microbit_machine_class_init,
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};
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static void microbit_machine_init(void)
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{
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type_register_static(µbit_info);
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}
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type_init(microbit_machine_init);
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