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10#include "qemu/osdep.h"
11#include "hw/hw.h"
12#include "hw/isa/isa.h"
13
14#define TYPE_ISA_DEBUG_EXIT_DEVICE "isa-debug-exit"
15#define ISA_DEBUG_EXIT_DEVICE(obj) \
16 OBJECT_CHECK(ISADebugExitState, (obj), TYPE_ISA_DEBUG_EXIT_DEVICE)
17
18typedef struct ISADebugExitState {
19 ISADevice parent_obj;
20
21 uint32_t iobase;
22 uint32_t iosize;
23 MemoryRegion io;
24} ISADebugExitState;
25
26static void debug_exit_write(void *opaque, hwaddr addr, uint64_t val,
27 unsigned width)
28{
29 exit((val << 1) | 1);
30}
31
32static const MemoryRegionOps debug_exit_ops = {
33 .write = debug_exit_write,
34 .valid.min_access_size = 1,
35 .valid.max_access_size = 4,
36 .endianness = DEVICE_LITTLE_ENDIAN,
37};
38
39static void debug_exit_realizefn(DeviceState *d, Error **errp)
40{
41 ISADevice *dev = ISA_DEVICE(d);
42 ISADebugExitState *isa = ISA_DEBUG_EXIT_DEVICE(d);
43
44 memory_region_init_io(&isa->io, OBJECT(dev), &debug_exit_ops, isa,
45 TYPE_ISA_DEBUG_EXIT_DEVICE, isa->iosize);
46 memory_region_add_subregion(isa_address_space_io(dev),
47 isa->iobase, &isa->io);
48}
49
50static Property debug_exit_properties[] = {
51 DEFINE_PROP_UINT32("iobase", ISADebugExitState, iobase, 0x501),
52 DEFINE_PROP_UINT32("iosize", ISADebugExitState, iosize, 0x02),
53 DEFINE_PROP_END_OF_LIST(),
54};
55
56static void debug_exit_class_initfn(ObjectClass *klass, void *data)
57{
58 DeviceClass *dc = DEVICE_CLASS(klass);
59
60 dc->realize = debug_exit_realizefn;
61 dc->props = debug_exit_properties;
62 set_bit(DEVICE_CATEGORY_MISC, dc->categories);
63}
64
65static const TypeInfo debug_exit_info = {
66 .name = TYPE_ISA_DEBUG_EXIT_DEVICE,
67 .parent = TYPE_ISA_DEVICE,
68 .instance_size = sizeof(ISADebugExitState),
69 .class_init = debug_exit_class_initfn,
70};
71
72static void debug_exit_register_types(void)
73{
74 type_register_static(&debug_exit_info);
75}
76
77type_init(debug_exit_register_types)
78