[deliverable/linux.git] / arch / x86 / kvm / i8254.h

#ifndef __I8254_H
#define __I8254_H

#include "iodev.h"

struct kvm_kpit_timer {
	struct hrtimer timer;
	int irq;
	s64 period; /* unit: ns */
	s64 scheduled;
	atomic_t pending;
};

struct kvm_kpit_channel_state {
	u32 count; /* can be 65536 */
	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; /* not supported */
	u8 gate; /* timer start */
	ktime_t count_load_time;
};

struct kvm_kpit_state {
	struct kvm_kpit_channel_state channels[3];
	struct kvm_kpit_timer pit_timer;
	u32    speaker_data_on;
	struct mutex lock;
	struct kvm_pit *pit;
	spinlock_t inject_lock;
	unsigned long irq_ack;
	struct kvm_irq_ack_notifier irq_ack_notifier;
};

struct kvm_pit {
	unsigned long base_addresss;
	struct kvm_io_device dev;
	struct kvm_io_device speaker_dev;
	struct kvm *kvm;
	struct kvm_kpit_state pit_state;
	int irq_source_id;
};

#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

void kvm_inject_pit_timer_irqs(struct kvm_vcpu *vcpu);
void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val);
struct kvm_pit *kvm_create_pit(struct kvm *kvm);
void kvm_free_pit(struct kvm *kvm);
void kvm_pit_reset(struct kvm_pit *pit);

#endif
Commit	Line	Data
7837699f SY	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;
7837699f SY	11	atomic_t pending;
	12	};
	13
	14	struct kvm_kpit_channel_state {
	15	u32 count; /* can be 65536 */
	16	u16 latched_count;
	17	u8 count_latched;
	18	u8 status_latched;
	19	u8 status;
	20	u8 read_state;
	21	u8 write_state;
	22	u8 write_latch;
	23	u8 rw_mode;
	24	u8 mode;
	25	u8 bcd; /* not supported */
	26	u8 gate; /* timer start */
	27	ktime_t count_load_time;
	28	};
	29
	30	struct kvm_kpit_state {
	31	struct kvm_kpit_channel_state channels[3];
	32	struct kvm_kpit_timer pit_timer;
	33	u32 speaker_data_on;
	34	struct mutex lock;
	35	struct kvm_pit *pit;
3cf57fed MT	36	spinlock_t inject_lock;
	37	unsigned long irq_ack;
	38	struct kvm_irq_ack_notifier irq_ack_notifier;
7837699f SY	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;
5550af4d	47	int irq_source_id;
7837699f SY	48	};
	49
	50	#define KVM_PIT_BASE_ADDRESS 0x40
	51	#define KVM_SPEAKER_BASE_ADDRESS 0x61
	52	#define KVM_PIT_MEM_LENGTH 4
	53	#define KVM_PIT_FREQ 1193181
	54	#define KVM_MAX_PIT_INTR_INTERVAL HZ / 100
	55	#define KVM_PIT_CHANNEL_MASK 0x3
	56
	57	void kvm_inject_pit_timer_irqs(struct kvm_vcpu *vcpu);
e0f63cb9	58	void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val);
7837699f SY	59	struct kvm_pit kvm_create_pit(struct kvm kvm);
7837699f SY	60	void kvm_free_pit(struct kvm *kvm);
308b0f23	61	void kvm_pit_reset(struct kvm_pit *pit);
7837699f SY	62
7837699f SY	63	#endif