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d11e859e JK |
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 | ||
0d09e41a | 28 | #include "hw/isa/isa.h" |
ec150c7e | 29 | #include "hw/timer/i8254.h" |
acf695ec | 30 | #include "qemu/timer.h" |
d11e859e JK |
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 | ||
cc963dcd | 53 | struct PITCommonState { |
d11e859e JK |
54 | ISADevice dev; |
55 | MemoryRegion ioports; | |
56 | uint32_t iobase; | |
57 | PITChannelState channels[3]; | |
cc963dcd | 58 | }; |
d11e859e | 59 | |
cc963dcd | 60 | struct PITCommonClass { |
d11e859e JK |
61 | ISADeviceClass parent_class; |
62 | ||
d11e859e JK |
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); | |
cc963dcd | 68 | }; |
d11e859e JK |
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 | ||
175de524 | 76 | #endif /* QEMU_I8254_INTERNAL_H */ |