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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
7837699f SY |
2 | #ifndef __I8254_H |
3 | #define __I8254_H | |
4 | ||
b6ddf05f JK |
5 | #include <linux/kthread.h> |
6 | ||
af669ac6 | 7 | #include <kvm/iodev.h> |
7837699f | 8 | |
7837699f SY |
9 | struct kvm_kpit_channel_state { |
10 | u32 count; /* can be 65536 */ | |
11 | u16 latched_count; | |
12 | u8 count_latched; | |
13 | u8 status_latched; | |
14 | u8 status; | |
15 | u8 read_state; | |
16 | u8 write_state; | |
17 | u8 write_latch; | |
18 | u8 rw_mode; | |
19 | u8 mode; | |
20 | u8 bcd; /* not supported */ | |
21 | u8 gate; /* timer start */ | |
22 | ktime_t count_load_time; | |
23 | }; | |
24 | ||
25 | struct kvm_kpit_state { | |
b39c90b6 | 26 | /* All members before "struct mutex lock" are protected by the lock. */ |
7837699f | 27 | struct kvm_kpit_channel_state channels[3]; |
e9f42757 | 28 | u32 flags; |
d3c7b77d | 29 | bool is_periodic; |
26ef1924 AK |
30 | s64 period; /* unit: ns */ |
31 | struct hrtimer timer; | |
7837699f | 32 | u32 speaker_data_on; |
b39c90b6 | 33 | |
7837699f | 34 | struct mutex lock; |
a0aace5a | 35 | atomic_t reinject; |
b39c90b6 | 36 | atomic_t pending; /* accumulated triggered timers */ |
ddf54503 | 37 | atomic_t irq_ack; |
3cf57fed | 38 | struct kvm_irq_ack_notifier irq_ack_notifier; |
7837699f SY |
39 | }; |
40 | ||
41 | struct kvm_pit { | |
7837699f SY |
42 | struct kvm_io_device dev; |
43 | struct kvm_io_device speaker_dev; | |
44 | struct kvm *kvm; | |
45 | struct kvm_kpit_state pit_state; | |
5550af4d | 46 | int irq_source_id; |
4780c659 | 47 | struct kvm_irq_mask_notifier mask_notifier; |
36da91bd | 48 | struct kthread_worker *worker; |
b6ddf05f | 49 | struct kthread_work expired; |
7837699f SY |
50 | }; |
51 | ||
52 | #define KVM_PIT_BASE_ADDRESS 0x40 | |
53 | #define KVM_SPEAKER_BASE_ADDRESS 0x61 | |
54 | #define KVM_PIT_MEM_LENGTH 4 | |
55 | #define KVM_PIT_FREQ 1193181 | |
56 | #define KVM_MAX_PIT_INTR_INTERVAL HZ / 100 | |
57 | #define KVM_PIT_CHANNEL_MASK 0x3 | |
58 | ||
c5ff41ce | 59 | struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags); |
7837699f | 60 | void kvm_free_pit(struct kvm *kvm); |
09edea72 | 61 | |
09edea72 RK |
62 | void kvm_pit_load_count(struct kvm_pit *pit, int channel, u32 val, |
63 | int hpet_legacy_start); | |
71474e2f | 64 | void kvm_pit_set_reinject(struct kvm_pit *pit, bool reinject); |
7837699f SY |
65 | |
66 | #endif |