root / hw / debugcon.c @ 00914b7d
History | View | Annotate | Download (3.2 kB)
1 |
/*
|
---|---|
2 |
* QEMU Bochs-style debug console ("port E9") emulation
|
3 |
*
|
4 |
* Copyright (c) 2003-2004 Fabrice Bellard
|
5 |
* Copyright (c) 2008 Citrix Systems, Inc.
|
6 |
* Copyright (c) Intel Corporation; author: H. Peter Anvin
|
7 |
*
|
8 |
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
9 |
* of this software and associated documentation files (the "Software"), to deal
|
10 |
* in the Software without restriction, including without limitation the rights
|
11 |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
12 |
* copies of the Software, and to permit persons to whom the Software is
|
13 |
* furnished to do so, subject to the following conditions:
|
14 |
*
|
15 |
* The above copyright notice and this permission notice shall be included in
|
16 |
* all copies or substantial portions of the Software.
|
17 |
*
|
18 |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
19 |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
20 |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
21 |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
22 |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
23 |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
24 |
* THE SOFTWARE.
|
25 |
*/
|
26 |
|
27 |
#include "hw.h" |
28 |
#include "qemu-char.h" |
29 |
#include "isa.h" |
30 |
#include "pc.h" |
31 |
|
32 |
//#define DEBUG_DEBUGCON
|
33 |
|
34 |
typedef struct DebugconState { |
35 |
CharDriverState *chr; |
36 |
uint32_t readback; |
37 |
} DebugconState; |
38 |
|
39 |
typedef struct ISADebugconState { |
40 |
ISADevice dev; |
41 |
uint32_t iobase; |
42 |
DebugconState state; |
43 |
} ISADebugconState; |
44 |
|
45 |
static void debugcon_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
46 |
{ |
47 |
DebugconState *s = opaque; |
48 |
unsigned char ch = val; |
49 |
|
50 |
#ifdef DEBUG_DEBUGCON
|
51 |
printf("debugcon: write addr=0x%04x val=0x%02x\n", addr, val);
|
52 |
#endif
|
53 |
|
54 |
qemu_chr_write(s->chr, &ch, 1);
|
55 |
} |
56 |
|
57 |
|
58 |
static uint32_t debugcon_ioport_read(void *opaque, uint32_t addr) |
59 |
{ |
60 |
DebugconState *s = opaque; |
61 |
|
62 |
#ifdef DEBUG_DEBUGCON
|
63 |
printf("debugcon: read addr=0x%04x\n", addr);
|
64 |
#endif
|
65 |
|
66 |
return s->readback;
|
67 |
} |
68 |
|
69 |
static void debugcon_init_core(DebugconState *s) |
70 |
{ |
71 |
if (!s->chr) {
|
72 |
fprintf(stderr, "Can't create debugcon device, empty char device\n");
|
73 |
exit(1);
|
74 |
} |
75 |
|
76 |
qemu_chr_add_handlers(s->chr, NULL, NULL, NULL, s); |
77 |
} |
78 |
|
79 |
static int debugcon_isa_initfn(ISADevice *dev) |
80 |
{ |
81 |
ISADebugconState *isa = DO_UPCAST(ISADebugconState, dev, dev); |
82 |
DebugconState *s = &isa->state; |
83 |
|
84 |
debugcon_init_core(s); |
85 |
register_ioport_write(isa->iobase, 1, 1, debugcon_ioport_write, s); |
86 |
register_ioport_read(isa->iobase, 1, 1, debugcon_ioport_read, s); |
87 |
return 0; |
88 |
} |
89 |
|
90 |
static ISADeviceInfo debugcon_isa_info = {
|
91 |
.qdev.name = "isa-debugcon",
|
92 |
.qdev.size = sizeof(ISADebugconState),
|
93 |
.init = debugcon_isa_initfn, |
94 |
.qdev.props = (Property[]) { |
95 |
DEFINE_PROP_HEX32("iobase", ISADebugconState, iobase, 0xe9), |
96 |
DEFINE_PROP_CHR("chardev", ISADebugconState, state.chr),
|
97 |
DEFINE_PROP_HEX32("readback", ISADebugconState, state.readback, 0xe9), |
98 |
DEFINE_PROP_END_OF_LIST(), |
99 |
}, |
100 |
}; |
101 |
|
102 |
static void debugcon_register_devices(void) |
103 |
{ |
104 |
isa_qdev_register(&debugcon_isa_info); |
105 |
} |
106 |
|
107 |
device_init(debugcon_register_devices) |