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Sheng Yang78376992008-01-28 05:10:22 +08001#ifndef __I8254_H
2#define __I8254_H
3
4#include "iodev.h"
5
6struct kvm_kpit_timer {
7 struct hrtimer timer;
8 int irq;
9 s64 period; /* unit: ns */
10 s64 scheduled;
Sheng Yang78376992008-01-28 05:10:22 +080011 atomic_t pending;
12};
13
14struct kvm_kpit_channel_state {
15 u32 count; /* can be 65536 */
16 u16 latched_count;
17 u8 count_latched;
18 u8 status_latched;
19 u8 status;
20 u8 read_state;
21 u8 write_state;
22 u8 write_latch;
23 u8 rw_mode;
24 u8 mode;
25 u8 bcd; /* not supported */
26 u8 gate; /* timer start */
27 ktime_t count_load_time;
28};
29
30struct kvm_kpit_state {
31 struct kvm_kpit_channel_state channels[3];
32 struct kvm_kpit_timer pit_timer;
33 u32 speaker_data_on;
34 struct mutex lock;
35 struct kvm_pit *pit;
Marcelo Tosatti3cf57fe2008-07-26 17:01:01 -030036 spinlock_t inject_lock;
37 unsigned long irq_ack;
38 struct kvm_irq_ack_notifier irq_ack_notifier;
Sheng Yang78376992008-01-28 05:10:22 +080039};
40
41struct kvm_pit {
42 unsigned long base_addresss;
43 struct kvm_io_device dev;
44 struct kvm_io_device speaker_dev;
45 struct kvm *kvm;
46 struct kvm_kpit_state pit_state;
Sheng Yang5550af42008-10-15 20:15:06 +080047 int irq_source_id;
Sheng Yang78376992008-01-28 05:10:22 +080048};
49
50#define KVM_PIT_BASE_ADDRESS 0x40
51#define KVM_SPEAKER_BASE_ADDRESS 0x61
52#define KVM_PIT_MEM_LENGTH 4
53#define KVM_PIT_FREQ 1193181
54#define KVM_MAX_PIT_INTR_INTERVAL HZ / 100
55#define KVM_PIT_CHANNEL_MASK 0x3
56
57void kvm_inject_pit_timer_irqs(struct kvm_vcpu *vcpu);
Sheng Yange0f63cb2008-03-04 00:50:59 +080058void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val);
Sheng Yang78376992008-01-28 05:10:22 +080059struct kvm_pit *kvm_create_pit(struct kvm *kvm);
60void kvm_free_pit(struct kvm *kvm);
Sheng Yang308b0f22008-03-13 10:22:26 +080061void kvm_pit_reset(struct kvm_pit *pit);
Sheng Yang78376992008-01-28 05:10:22 +080062
63#endif