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/isa/isa.h" |
29 | #include "hw/timer/i8254.h" |
30 | #include "qemu/timer.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 | typedef struct PITCommonClass { |
61 | ISADeviceClass parent_class; |
62 | |
63 | void (*set_channel_gate)(PITCommonState *s, PITChannelState *sc, int val); |
64 | void (*get_channel_info)(PITCommonState *s, PITChannelState *sc, |
65 | PITChannelInfo *info); |
66 | void (*pre_save)(PITCommonState *s); |
67 | void (*post_load)(PITCommonState *s); |
68 | } PITCommonClass; |
69 | |
70 | int pit_get_out(PITChannelState *s, int64_t current_time); |
71 | int64_t pit_get_next_transition_time(PITChannelState *s, int64_t current_time); |
72 | void pit_get_channel_info_common(PITCommonState *s, PITChannelState *sc, |
73 | PITChannelInfo *info); |
74 | void pit_reset_common(PITCommonState *s); |
75 | |
76 | #endif /* QEMU_I8254_INTERNAL_H */ |
77 | |