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- #ifndef __I8254_H
- #define __I8254_H
- #include <linux/kthread.h>
- #include <kvm/iodev.h>
- struct kvm_kpit_channel_state {
- u32 count;
- u16 latched_count;
- u8 count_latched;
- u8 status_latched;
- u8 status;
- u8 read_state;
- u8 write_state;
- u8 write_latch;
- u8 rw_mode;
- u8 mode;
- u8 bcd;
- u8 gate;
- ktime_t count_load_time;
- };
- struct kvm_kpit_state {
-
- struct kvm_kpit_channel_state channels[3];
- u32 flags;
- bool is_periodic;
- s64 period;
- struct hrtimer timer;
- u32 speaker_data_on;
- struct mutex lock;
- atomic_t reinject;
- atomic_t pending;
- atomic_t irq_ack;
- struct kvm_irq_ack_notifier irq_ack_notifier;
- };
- struct kvm_pit {
- struct kvm_io_device dev;
- struct kvm_io_device speaker_dev;
- struct kvm *kvm;
- struct kvm_kpit_state pit_state;
- int irq_source_id;
- struct kvm_irq_mask_notifier mask_notifier;
- struct kthread_worker worker;
- struct task_struct *worker_task;
- struct kthread_work expired;
- };
- #define KVM_PIT_BASE_ADDRESS 0x40
- #define KVM_SPEAKER_BASE_ADDRESS 0x61
- #define KVM_PIT_MEM_LENGTH 4
- #define KVM_PIT_FREQ 1193181
- #define KVM_MAX_PIT_INTR_INTERVAL HZ / 100
- #define KVM_PIT_CHANNEL_MASK 0x3
- struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags);
- void kvm_free_pit(struct kvm *kvm);
- void kvm_pit_load_count(struct kvm_pit *pit, int channel, u32 val,
- int hpet_legacy_start);
- void kvm_pit_set_reinject(struct kvm_pit *pit, bool reinject);
- #endif
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