1 | /* |
2 | * debug exit port emulation |
3 | * |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU General Public License as |
6 | * published by the Free Software Foundation; either version 2 or |
7 | * (at your option) any later version. |
8 | */ |
9 | |
10 | #include "qemu/osdep.h" |
11 | #include "hw/isa/isa.h" |
12 | #include "hw/qdev-properties.h" |
13 | #include "qemu/module.h" |
14 | |
15 | #define TYPE_ISA_DEBUG_EXIT_DEVICE "isa-debug-exit" |
16 | #define ISA_DEBUG_EXIT_DEVICE(obj) \ |
17 | OBJECT_CHECK(ISADebugExitState, (obj), TYPE_ISA_DEBUG_EXIT_DEVICE) |
18 | |
19 | typedef struct ISADebugExitState { |
20 | ISADevice parent_obj; |
21 | |
22 | uint32_t iobase; |
23 | uint32_t iosize; |
24 | MemoryRegion io; |
25 | } ISADebugExitState; |
26 | |
27 | static uint64_t debug_exit_read(void *opaque, hwaddr addr, unsigned size) |
28 | { |
29 | return 0; |
30 | } |
31 | |
32 | static void debug_exit_write(void *opaque, hwaddr addr, uint64_t val, |
33 | unsigned width) |
34 | { |
35 | exit((val << 1) | 1); |
36 | } |
37 | |
38 | static const MemoryRegionOps debug_exit_ops = { |
39 | .read = debug_exit_read, |
40 | .write = debug_exit_write, |
41 | .valid.min_access_size = 1, |
42 | .valid.max_access_size = 4, |
43 | .endianness = DEVICE_LITTLE_ENDIAN, |
44 | }; |
45 | |
46 | static void debug_exit_realizefn(DeviceState *d, Error **errp) |
47 | { |
48 | ISADevice *dev = ISA_DEVICE(d); |
49 | ISADebugExitState *isa = ISA_DEBUG_EXIT_DEVICE(d); |
50 | |
51 | memory_region_init_io(&isa->io, OBJECT(dev), &debug_exit_ops, isa, |
52 | TYPE_ISA_DEBUG_EXIT_DEVICE, isa->iosize); |
53 | memory_region_add_subregion(isa_address_space_io(dev), |
54 | isa->iobase, &isa->io); |
55 | } |
56 | |
57 | static Property debug_exit_properties[] = { |
58 | DEFINE_PROP_UINT32("iobase" , ISADebugExitState, iobase, 0x501), |
59 | DEFINE_PROP_UINT32("iosize" , ISADebugExitState, iosize, 0x02), |
60 | DEFINE_PROP_END_OF_LIST(), |
61 | }; |
62 | |
63 | static void debug_exit_class_initfn(ObjectClass *klass, void *data) |
64 | { |
65 | DeviceClass *dc = DEVICE_CLASS(klass); |
66 | |
67 | dc->realize = debug_exit_realizefn; |
68 | dc->props = debug_exit_properties; |
69 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
70 | } |
71 | |
72 | static const TypeInfo debug_exit_info = { |
73 | .name = TYPE_ISA_DEBUG_EXIT_DEVICE, |
74 | .parent = TYPE_ISA_DEVICE, |
75 | .instance_size = sizeof(ISADebugExitState), |
76 | .class_init = debug_exit_class_initfn, |
77 | }; |
78 | |
79 | static void debug_exit_register_types(void) |
80 | { |
81 | type_register_static(&debug_exit_info); |
82 | } |
83 | |
84 | type_init(debug_exit_register_types) |
85 | |