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25#ifndef HW_I8254_H
26#define HW_I8254_H
27
28#include "hw/hw.h"
29#include "hw/isa/isa.h"
30
31#define PIT_FREQ 1193182
32
33typedef struct PITChannelInfo {
34 int gate;
35 int mode;
36 int initial_count;
37 int out;
38} PITChannelInfo;
39
40#define TYPE_I8254 "isa-pit"
41#define TYPE_KVM_I8254 "kvm-pit"
42
43static inline ISADevice *pit_init(ISABus *bus, int base, int isa_irq,
44 qemu_irq alt_irq)
45{
46 DeviceState *dev;
47 ISADevice *d;
48
49 d = isa_create(bus, TYPE_I8254);
50 dev = DEVICE(d);
51 qdev_prop_set_uint32(dev, "iobase", base);
52 qdev_init_nofail(dev);
53 qdev_connect_gpio_out(dev, 0,
54 isa_irq >= 0 ? isa_get_irq(d, isa_irq) : alt_irq);
55
56 return d;
57}
58
59static inline ISADevice *kvm_pit_init(ISABus *bus, int base)
60{
61 DeviceState *dev;
62 ISADevice *d;
63
64 d = isa_create(bus, TYPE_KVM_I8254);
65 dev = DEVICE(d);
66 qdev_prop_set_uint32(dev, "iobase", base);
67 qdev_init_nofail(dev);
68
69 return d;
70}
71
72void pit_set_gate(ISADevice *dev, int channel, int val);
73void pit_get_channel_info(ISADevice *dev, int channel, PITChannelInfo *info);
74
75#endif
76