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