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66 lines
1.6 KiB
66 lines
1.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __I8254_H |
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#define __I8254_H |
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#include <linux/kthread.h> |
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#include <kvm/iodev.h> |
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struct kvm_kpit_channel_state { |
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u32 count; /* can be 65536 */ |
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u16 latched_count; |
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u8 count_latched; |
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u8 status_latched; |
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u8 status; |
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u8 read_state; |
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u8 write_state; |
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u8 write_latch; |
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u8 rw_mode; |
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u8 mode; |
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u8 bcd; /* not supported */ |
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u8 gate; /* timer start */ |
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ktime_t count_load_time; |
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}; |
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struct kvm_kpit_state { |
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/* All members before "struct mutex lock" are protected by the lock. */ |
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struct kvm_kpit_channel_state channels[3]; |
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u32 flags; |
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bool is_periodic; |
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s64 period; /* unit: ns */ |
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struct hrtimer timer; |
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u32 speaker_data_on; |
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struct mutex lock; |
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atomic_t reinject; |
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atomic_t pending; /* accumulated triggered timers */ |
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atomic_t irq_ack; |
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struct kvm_irq_ack_notifier irq_ack_notifier; |
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}; |
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struct kvm_pit { |
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struct kvm_io_device dev; |
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struct kvm_io_device speaker_dev; |
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struct kvm *kvm; |
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struct kvm_kpit_state pit_state; |
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int irq_source_id; |
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struct kvm_irq_mask_notifier mask_notifier; |
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struct kthread_worker *worker; |
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struct kthread_work expired; |
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}; |
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#define KVM_PIT_BASE_ADDRESS 0x40 |
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#define KVM_SPEAKER_BASE_ADDRESS 0x61 |
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#define KVM_PIT_MEM_LENGTH 4 |
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#define KVM_PIT_FREQ 1193181 |
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#define KVM_MAX_PIT_INTR_INTERVAL HZ / 100 |
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#define KVM_PIT_CHANNEL_MASK 0x3 |
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struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags); |
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void kvm_free_pit(struct kvm *kvm); |
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void kvm_pit_load_count(struct kvm_pit *pit, int channel, u32 val, |
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int hpet_legacy_start); |
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void kvm_pit_set_reinject(struct kvm_pit *pit, bool reinject); |
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#endif
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