block/export: Add query-block-exports
[qemu.git] / include / hw / timer / i8254.h
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/qdev-properties.h"
29 #include "hw/isa/isa.h"
30 #include "qapi/error.h"
31 #include "qom/object.h"
32
33 #define PIT_FREQ 1193182
34
35 typedef struct PITChannelInfo {
36 int gate;
37 int mode;
38 int initial_count;
39 int out;
40 } PITChannelInfo;
41
42 #define TYPE_PIT_COMMON "pit-common"
43 OBJECT_DECLARE_TYPE(PITCommonState, PITCommonClass, PIT_COMMON)
44
45 #define TYPE_I8254 "isa-pit"
46 #define TYPE_KVM_I8254 "kvm-pit"
47
48 static inline ISADevice *i8254_pit_init(ISABus *bus, int base, int isa_irq,
49 qemu_irq alt_irq)
50 {
51 DeviceState *dev;
52 ISADevice *d;
53
54 d = isa_new(TYPE_I8254);
55 dev = DEVICE(d);
56 qdev_prop_set_uint32(dev, "iobase", base);
57 isa_realize_and_unref(d, bus, &error_fatal);
58 qdev_connect_gpio_out(dev, 0,
59 isa_irq >= 0 ? isa_get_irq(d, isa_irq) : alt_irq);
60
61 return d;
62 }
63
64 static inline ISADevice *kvm_pit_init(ISABus *bus, int base)
65 {
66 DeviceState *dev;
67 ISADevice *d;
68
69 d = isa_new(TYPE_KVM_I8254);
70 dev = DEVICE(d);
71 qdev_prop_set_uint32(dev, "iobase", base);
72 isa_realize_and_unref(d, bus, &error_fatal);
73
74 return d;
75 }
76
77 void pit_set_gate(ISADevice *dev, int channel, int val);
78 void pit_get_channel_info(ISADevice *dev, int channel, PITChannelInfo *info);
79
80 #endif /* HW_I8254_H */