root / hw / i8254_internal.h @ c9159fe9
History | View | Annotate | Download (3 kB)
1 |
/*
|
---|---|
2 |
* QEMU 8253/8254 - internal interfaces
|
3 |
*
|
4 |
* Copyright (c) 2011 Jan Kiszka, Siemens AG
|
5 |
*
|
6 |
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
7 |
* of this software and associated documentation files (the "Software"), to deal
|
8 |
* in the Software without restriction, including without limitation the rights
|
9 |
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
10 |
* copies of the Software, and to permit persons to whom the Software is
|
11 |
* furnished to do so, subject to the following conditions:
|
12 |
*
|
13 |
* The above copyright notice and this permission notice shall be included in
|
14 |
* all copies or substantial portions of the Software.
|
15 |
*
|
16 |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
17 |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
18 |
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
19 |
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
20 |
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
21 |
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
22 |
* THE SOFTWARE.
|
23 |
*/
|
24 |
|
25 |
#ifndef QEMU_I8254_INTERNAL_H
|
26 |
#define QEMU_I8254_INTERNAL_H
|
27 |
|
28 |
#include "hw.h" |
29 |
#include "pc.h" |
30 |
#include "isa.h" |
31 |
|
32 |
typedef struct PITChannelState { |
33 |
int count; /* can be 65536 */ |
34 |
uint16_t latched_count; |
35 |
uint8_t count_latched; |
36 |
uint8_t status_latched; |
37 |
uint8_t status; |
38 |
uint8_t read_state; |
39 |
uint8_t write_state; |
40 |
uint8_t write_latch; |
41 |
uint8_t rw_mode; |
42 |
uint8_t mode; |
43 |
uint8_t bcd; /* not supported */
|
44 |
uint8_t gate; /* timer start */
|
45 |
int64_t count_load_time; |
46 |
/* irq handling */
|
47 |
int64_t next_transition_time; |
48 |
QEMUTimer *irq_timer; |
49 |
qemu_irq irq; |
50 |
uint32_t irq_disabled; |
51 |
} PITChannelState; |
52 |
|
53 |
typedef struct PITCommonState { |
54 |
ISADevice dev; |
55 |
MemoryRegion ioports; |
56 |
uint32_t iobase; |
57 |
PITChannelState channels[3];
|
58 |
} PITCommonState; |
59 |
|
60 |
#define TYPE_PIT_COMMON "pit-common" |
61 |
#define PIT_COMMON(obj) \
|
62 |
OBJECT_CHECK(PITCommonState, (obj), TYPE_PIT_COMMON) |
63 |
#define PIT_COMMON_CLASS(klass) \
|
64 |
OBJECT_CLASS_CHECK(PITCommonClass, (klass), TYPE_PIT_COMMON) |
65 |
#define PIT_COMMON_GET_CLASS(obj) \
|
66 |
OBJECT_GET_CLASS(PITCommonClass, (obj), TYPE_PIT_COMMON) |
67 |
|
68 |
typedef struct PITCommonClass { |
69 |
ISADeviceClass parent_class; |
70 |
|
71 |
int (*init)(PITCommonState *s);
|
72 |
void (*set_channel_gate)(PITCommonState *s, PITChannelState *sc, int val); |
73 |
void (*get_channel_info)(PITCommonState *s, PITChannelState *sc,
|
74 |
PITChannelInfo *info); |
75 |
void (*pre_save)(PITCommonState *s);
|
76 |
void (*post_load)(PITCommonState *s);
|
77 |
} PITCommonClass; |
78 |
|
79 |
int pit_get_out(PITChannelState *s, int64_t current_time);
|
80 |
int64_t pit_get_next_transition_time(PITChannelState *s, int64_t current_time); |
81 |
void pit_get_channel_info_common(PITCommonState *s, PITChannelState *sc,
|
82 |
PITChannelInfo *info); |
83 |
void pit_reset_common(PITCommonState *s);
|
84 |
|
85 |
#endif /* !QEMU_I8254_INTERNAL_H */ |