84 lines
2.3 KiB
C
84 lines
2.3 KiB
C
/*
|
|
* 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/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 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)
|
|
{
|
|
exit((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;
|
|
dc->props = 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)
|