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7837699f SY |
1 | #ifndef __I8254_H |
2 | #define __I8254_H | |
3 | ||
4 | #include "iodev.h" | |
5 | ||
6 | struct kvm_kpit_timer { | |
7 | struct hrtimer timer; | |
8 | int irq; | |
9 | s64 period; /* unit: ns */ | |
10 | s64 scheduled; | |
11 | ktime_t last_update; | |
12 | atomic_t pending; | |
13 | }; | |
14 | ||
15 | struct kvm_kpit_channel_state { | |
16 | u32 count; /* can be 65536 */ | |
17 | u16 latched_count; | |
18 | u8 count_latched; | |
19 | u8 status_latched; | |
20 | u8 status; | |
21 | u8 read_state; | |
22 | u8 write_state; | |
23 | u8 write_latch; | |
24 | u8 rw_mode; | |
25 | u8 mode; | |
26 | u8 bcd; /* not supported */ | |
27 | u8 gate; /* timer start */ | |
28 | ktime_t count_load_time; | |
29 | }; | |
30 | ||
31 | struct kvm_kpit_state { | |
32 | struct kvm_kpit_channel_state channels[3]; | |
33 | struct kvm_kpit_timer pit_timer; | |
34 | u32 speaker_data_on; | |
35 | struct mutex lock; | |
36 | struct kvm_pit *pit; | |
37 | bool inject_pending; /* if inject pending interrupts */ | |
38 | unsigned long last_injected_time; | |
39 | }; | |
40 | ||
41 | struct 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; | |
47 | }; | |
48 | ||
49 | #define KVM_PIT_BASE_ADDRESS 0x40 | |
50 | #define KVM_SPEAKER_BASE_ADDRESS 0x61 | |
51 | #define KVM_PIT_MEM_LENGTH 4 | |
52 | #define KVM_PIT_FREQ 1193181 | |
53 | #define KVM_MAX_PIT_INTR_INTERVAL HZ / 100 | |
54 | #define KVM_PIT_CHANNEL_MASK 0x3 | |
55 | ||
56 | void kvm_inject_pit_timer_irqs(struct kvm_vcpu *vcpu); | |
57 | void kvm_pit_timer_intr_post(struct kvm_vcpu *vcpu, int vec); | |
e0f63cb9 | 58 | void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val); |
7837699f SY |
59 | struct kvm_pit *kvm_create_pit(struct kvm *kvm); |
60 | void kvm_free_pit(struct kvm *kvm); | |
308b0f23 | 61 | void kvm_pit_reset(struct kvm_pit *pit); |
7837699f SY |
62 | |
63 | #endif |