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/*
* GPL HEADER START
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* GPL HEADER END
*
* Copyright 2011 various Linux Kernel contributors.
* Copyright 2011 Joyent, Inc. All Rights Reserved.
*/
#ifndef __KVM_I8254_H
#define __KVM_I8254_H
#include "kvm_iodev.h"
#include "kvm_timer.h"
typedef struct kvm_kpit_channel_state {
uint32_t count; /* can be 65536 */
uint16_t latched_count;
uint8_t count_latched;
uint8_t status_latched;
uint8_t status;
uint8_t read_state;
uint8_t write_state;
uint8_t write_latch;
uint8_t rw_mode;
uint8_t mode;
uint8_t bcd; /* not supported */
uint8_t gate; /* timer start */
hrtime_t count_load_time;
} kvm_kpit_channel_state_t;
typedef struct kvm_kpit_state {
struct kvm_kpit_channel_state channels[3];
uint32_t flags;
struct kvm_timer pit_timer;
int is_periodic;
uint32_t speaker_data_on;
kmutex_t lock;
struct kvm_pit *pit;
kmutex_t inject_lock;
unsigned long irq_ack;
struct kvm_irq_ack_notifier irq_ack_notifier;
} kvm_kpit_state_t;
typedef 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;
struct kvm_irq_mask_notifier mask_notifier;
} kvm_pit_t;
#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
extern void kvm_inject_pit_timer_irqs(struct kvm_vcpu *);
extern void kvm_pit_load_count(struct kvm *, int, uint32_t, boolean_t);
extern struct kvm_pit *kvm_create_pit(struct kvm *, uint32_t);
extern void kvm_free_pit(struct kvm *);
extern void kvm_pit_reset(struct kvm_pit *);
#endif
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