1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
/*
* QEMU Bochs-style debug console ("port E9") emulation
*
* Copyright (c) 2003-2004 Fabrice Bellard
* Copyright (c) 2008 Citrix Systems, Inc.
* Copyright (c) Intel Corporation; author: H. Peter Anvin
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "hw/hw.h"
#include "sysemu/char.h"
#include "hw/isa/isa.h"
#include "hw/i386/pc.h"
#define TYPE_ISA_DEBUGCON_DEVICE "isa-debugcon"
#define ISA_DEBUGCON_DEVICE(obj) \
OBJECT_CHECK(ISADebugconState, (obj), TYPE_ISA_DEBUGCON_DEVICE)
//#define DEBUG_DEBUGCON
typedef struct DebugconState {
MemoryRegion io;
CharDriverState *chr;
uint32_t readback;
} DebugconState;
typedef struct ISADebugconState {
ISADevice parent_obj;
uint32_t iobase;
DebugconState state;
} ISADebugconState;
static void debugcon_ioport_write(void *opaque, hwaddr addr, uint64_t val,
unsigned width)
{
DebugconState *s = opaque;
unsigned char ch = val;
#ifdef DEBUG_DEBUGCON
printf(" [debugcon: write addr=0x%04" HWADDR_PRIx " val=0x%02" PRIx64 "]\n", addr, val);
#endif
qemu_chr_fe_write(s->chr, &ch, 1);
}
static uint64_t debugcon_ioport_read(void *opaque, hwaddr addr, unsigned width)
{
DebugconState *s = opaque;
#ifdef DEBUG_DEBUGCON
printf("debugcon: read addr=0x%04" HWADDR_PRIx "\n", addr);
#endif
return s->readback;
}
static const MemoryRegionOps debugcon_ops = {
.read = debugcon_ioport_read,
.write = debugcon_ioport_write,
.valid.min_access_size = 1,
.valid.max_access_size = 1,
.endianness = DEVICE_LITTLE_ENDIAN,
};
static void debugcon_realize_core(DebugconState *s, Error **errp)
{
if (!s->chr) {
error_setg(errp, "Can't create debugcon device, empty char device");
return;
}
qemu_chr_add_handlers(s->chr, NULL, NULL, NULL, s);
}
static void debugcon_isa_realizefn(DeviceState *dev, Error **errp)
{
ISADevice *d = ISA_DEVICE(dev);
ISADebugconState *isa = ISA_DEBUGCON_DEVICE(dev);
DebugconState *s = &isa->state;
Error *err = NULL;
debugcon_realize_core(s, &err);
if (err != NULL) {
error_propagate(errp, err);
return;
}
memory_region_init_io(&s->io, OBJECT(dev), &debugcon_ops, s,
TYPE_ISA_DEBUGCON_DEVICE, 1);
memory_region_add_subregion(isa_address_space_io(d),
isa->iobase, &s->io);
}
static Property debugcon_isa_properties[] = {
DEFINE_PROP_UINT32("iobase", ISADebugconState, iobase, 0xe9),
DEFINE_PROP_CHR("chardev", ISADebugconState, state.chr),
DEFINE_PROP_UINT32("readback", ISADebugconState, state.readback, 0xe9),
DEFINE_PROP_END_OF_LIST(),
};
static void debugcon_isa_class_initfn(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = debugcon_isa_realizefn;
dc->props = debugcon_isa_properties;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
}
static const TypeInfo debugcon_isa_info = {
.name = TYPE_ISA_DEBUGCON_DEVICE,
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(ISADebugconState),
.class_init = debugcon_isa_class_initfn,
};
static void debugcon_register_types(void)
{
type_register_static(&debugcon_isa_info);
}
type_init(debugcon_register_types)
|
