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b1277b03 JK |
1 | /* |
2 | * QEMU 8253/8254 interval timer emulation | |
3 | * | |
4 | * Copyright (c) 2003-2004 Fabrice Bellard | |
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 HW_I8254_H | |
26 | #define HW_I8254_H | |
27 | ||
28 | #include "hw.h" | |
29 | #include "isa.h" | |
30 | ||
31 | #define PIT_FREQ 1193182 | |
32 | ||
319ba9f5 JK |
33 | static inline ISADevice *pit_init(ISABus *bus, int base, int isa_irq, |
34 | qemu_irq alt_irq) | |
b1277b03 JK |
35 | { |
36 | ISADevice *dev; | |
37 | ||
38 | dev = isa_create(bus, "isa-pit"); | |
39 | qdev_prop_set_uint32(&dev->qdev, "iobase", base); | |
b1277b03 | 40 | qdev_init_nofail(&dev->qdev); |
319ba9f5 JK |
41 | qdev_connect_gpio_out(&dev->qdev, 0, |
42 | isa_irq >= 0 ? isa_get_irq(dev, isa_irq) : alt_irq); | |
b1277b03 JK |
43 | |
44 | return dev; | |
45 | } | |
46 | ||
47 | void pit_set_gate(ISADevice *dev, int channel, int val); | |
48 | int pit_get_gate(ISADevice *dev, int channel); | |
49 | int pit_get_initial_count(ISADevice *dev, int channel); | |
50 | int pit_get_mode(ISADevice *dev, int channel); | |
51 | int pit_get_out(ISADevice *dev, int channel, int64_t current_time); | |
52 | ||
b1277b03 | 53 | #endif /* !HW_I8254_H */ |