Archipelago » qemu

/*

 * debug exit port emulation

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License as

 * published by the Free Software Foundation; either version 2 or

 * (at your option) any later version.

 */

#include "hw/hw.h"

#include "hw/isa/isa.h"

#define TYPE_ISA_DEBUG_EXIT_DEVICE "isa-debug-exit"

#define ISA_DEBUG_EXIT_DEVICE(obj) \

     OBJECT_CHECK(ISADebugExitState, (obj), TYPE_ISA_DEBUG_EXIT_DEVICE)

typedef struct ISADebugExitState {

    ISADevice parent_obj;

    uint32_t iobase;

    uint32_t iosize;

    MemoryRegion io;

} ISADebugExitState;

static void debug_exit_write(void *opaque, hwaddr addr, uint64_t val,

                             unsigned width)

{

    exit((val << 1) | 1);

}

static const MemoryRegionOps debug_exit_ops = {

    .write = debug_exit_write,

    .valid.min_access_size = 1,

    .valid.max_access_size = 4,

    .endianness = DEVICE_LITTLE_ENDIAN,

};

static int debug_exit_initfn(ISADevice *dev)

{

    ISADebugExitState *isa = ISA_DEBUG_EXIT_DEVICE(dev);

    memory_region_init_io(&isa->io, &debug_exit_ops, isa,

                          TYPE_ISA_DEBUG_EXIT_DEVICE, isa->iosize);

    memory_region_add_subregion(isa_address_space_io(dev),

                                isa->iobase, &isa->io);

    return 0;

}

static Property debug_exit_properties[] = {

    DEFINE_PROP_HEX32("iobase", ISADebugExitState, iobase, 0x501),

    DEFINE_PROP_HEX32("iosize", ISADebugExitState, iosize, 0x02),

    DEFINE_PROP_END_OF_LIST(),

};

static void debug_exit_class_initfn(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);

    ic->init = debug_exit_initfn;

    dc->props = debug_exit_properties;

}

static const TypeInfo debug_exit_info = {

    .name          = TYPE_ISA_DEBUG_EXIT_DEVICE,

    .parent        = TYPE_ISA_DEVICE,

    .instance_size = sizeof(ISADebugExitState),

    .class_init    = debug_exit_class_initfn,

};

static void debug_exit_register_types(void)

{

    type_register_static(&debug_exit_info);

}

type_init(debug_exit_register_types)