| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 1 | #ifndef __I8254_H |
| 2 | #define __I8254_H |
| 3 | |
| 4 | #include <linux/kthread.h> |
| 5 | |
| 6 | #include <kvm/iodev.h> |
| 7 | |
| 8 | struct kvm_kpit_channel_state { |
| 9 | u32 count; /* can be 65536 */ |
| 10 | u16 latched_count; |
| 11 | u8 count_latched; |
| 12 | u8 status_latched; |
| 13 | u8 status; |
| 14 | u8 read_state; |
| 15 | u8 write_state; |
| 16 | u8 write_latch; |
| 17 | u8 rw_mode; |
| 18 | u8 mode; |
| 19 | u8 bcd; /* not supported */ |
| 20 | u8 gate; /* timer start */ |
| 21 | ktime_t count_load_time; |
| 22 | }; |
| 23 | |
| 24 | struct kvm_kpit_state { |
| 25 | struct kvm_kpit_channel_state channels[3]; |
| 26 | u32 flags; |
| 27 | bool is_periodic; |
| 28 | s64 period; /* unit: ns */ |
| 29 | struct hrtimer timer; |
| 30 | atomic_t pending; /* accumulated triggered timers */ |
| 31 | bool reinject; |
| 32 | struct kvm *kvm; |
| 33 | u32 speaker_data_on; |
| 34 | struct mutex lock; |
| 35 | struct kvm_pit *pit; |
| 36 | spinlock_t inject_lock; |
| 37 | unsigned long irq_ack; |
| 38 | struct kvm_irq_ack_notifier irq_ack_notifier; |
| 39 | }; |
| 40 | |
| 41 | struct kvm_pit { |
| 42 | struct kvm_io_device dev; |
| 43 | struct kvm_io_device speaker_dev; |
| 44 | struct kvm *kvm; |
| 45 | struct kvm_kpit_state pit_state; |
| 46 | int irq_source_id; |
| 47 | struct kvm_irq_mask_notifier mask_notifier; |
| 48 | struct kthread_worker worker; |
| 49 | struct task_struct *worker_task; |
| 50 | struct kthread_work expired; |
| 51 | }; |
| 52 | |
| 53 | #define KVM_PIT_BASE_ADDRESS 0x40 |
| 54 | #define KVM_SPEAKER_BASE_ADDRESS 0x61 |
| 55 | #define KVM_PIT_MEM_LENGTH 4 |
| 56 | #define KVM_PIT_FREQ 1193181 |
| 57 | #define KVM_MAX_PIT_INTR_INTERVAL HZ / 100 |
| 58 | #define KVM_PIT_CHANNEL_MASK 0x3 |
| 59 | |
| 60 | void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val, int hpet_legacy_start); |
| 61 | struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags); |
| 62 | void kvm_free_pit(struct kvm *kvm); |
| 63 | void kvm_pit_reset(struct kvm_pit *pit); |
| 64 | |
| 65 | #endif |