Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394...
[linux-2.6] / arch / x86 / kvm / i8254.h
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);
58 void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val);
59 struct kvm_pit *kvm_create_pit(struct kvm *kvm);
60 void kvm_free_pit(struct kvm *kvm);
61 void kvm_pit_reset(struct kvm_pit *pit);
62
63 #endif