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/*
* 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 "qemu/osdep.h"
#include "hw/isa/isa.h"
#include "hw/qdev-properties.h"
#include "qemu/module.h"
#include "qom/object.h"
#include "sysemu/runstate.h"
#define TYPE_ISA_DEBUG_EXIT_DEVICE "isa-debug-exit"
OBJECT_DECLARE_SIMPLE_TYPE(ISADebugExitState, ISA_DEBUG_EXIT_DEVICE)
struct ISADebugExitState {
ISADevice parent_obj;
uint32_t iobase;
uint32_t iosize;
MemoryRegion io;
};
static uint64_t debug_exit_read(void *opaque, hwaddr addr, unsigned size)
{
return 0;
}
static void debug_exit_write(void *opaque, hwaddr addr, uint64_t val,
unsigned width)
{
qemu_system_shutdown_request_with_code(SHUTDOWN_CAUSE_GUEST_SHUTDOWN,
(val << 1) | 1);
}
static const MemoryRegionOps debug_exit_ops = {
.read = debug_exit_read,
.write = debug_exit_write,
.valid.min_access_size = 1,
.valid.max_access_size = 4,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void debug_exit_realizefn(DeviceState *d, Error **errp)
{
ISADevice *dev = ISA_DEVICE(d);
ISADebugExitState *isa = ISA_DEBUG_EXIT_DEVICE(d);
memory_region_init_io(&isa->io, OBJECT(dev), &debug_exit_ops, isa,
TYPE_ISA_DEBUG_EXIT_DEVICE, isa->iosize);
memory_region_add_subregion(isa_address_space_io(dev),
isa->iobase, &isa->io);
}
static Property debug_exit_properties[] = {
DEFINE_PROP_UINT32("iobase", ISADebugExitState, iobase, 0x501),
DEFINE_PROP_UINT32("iosize", ISADebugExitState, iosize, 0x02),
DEFINE_PROP_END_OF_LIST(),
};
static void debug_exit_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = debug_exit_realizefn;
device_class_set_props(dc, debug_exit_properties);
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
}
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)
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