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/*
* kvm_irq.h: in kernel interrupt controller related definitions
* Copyright (c) 2007, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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., 59 Temple
* Place - Suite 330, Boston, MA 02111-1307 USA.
* Authors:
* Yaozu (Eddie) Dong <Eddie.dong@intel.com>
*
* Copyright 2011 Joyent, Inc. All Rights Reserved.
*/
#ifndef __IRQ_H
#define __IRQ_H
#include <sys/mutex.h>
#include "kvm_host.h"
#include "kvm_iodev.h"
#include "kvm_ioapic.h"
#include "kvm_lapic.h"
#define PIC_NUM_PINS 16
#define SELECT_PIC(irq) \
((irq) < 8 ? KVM_IRQCHIP_PIC_MASTER : KVM_IRQCHIP_PIC_SLAVE)
struct kvm;
struct kvm_vcpu;
typedef void irq_request_func(void *opaque, int level);
typedef struct kvm_kpic_state {
uint8_t last_irr; /* edge detection */
uint8_t irr; /* interrupt request register */
uint8_t imr; /* interrupt mask register */
uint8_t isr; /* interrupt service register */
uint8_t isr_ack; /* interrupt ack detection */
uint8_t priority_add; /* highest irq priority */
uint8_t irq_base;
uint8_t read_reg_select;
uint8_t poll;
uint8_t special_mask;
uint8_t init_state;
uint8_t auto_eoi;
uint8_t rotate_on_auto_eoi;
uint8_t special_fully_nested_mode;
uint8_t init4; /* true if 4 byte init */
uint8_t elcr; /* PIIX edge/trigger selection */
uint8_t elcr_mask;
struct kvm_pic *pics_state;
} kvm_kpic_state_t;
typedef struct kvm_pic {
kmutex_t lock;
unsigned pending_acks;
struct kvm *kvm;
struct kvm_kpic_state pics[2]; /* 0 is master pic, 1 is slave pic */
irq_request_func *irq_request;
void *irq_request_opaque;
int output; /* intr from master PIC */
struct kvm_io_device dev;
void (*ack_notifier)(void *opaque, int irq);
unsigned long irq_states[16];
} kvm_pic_t;
extern struct kvm_pic *kvm_create_pic(struct kvm *kvm);
extern void kvm_destroy_pic(struct kvm *kvm);
extern int kvm_pic_read_irq(struct kvm *kvm);
extern void kvm_pic_update_irq(struct kvm_pic *s);
extern void kvm_pic_clear_isr_ack(struct kvm *kvm);
extern struct kvm_pic *pic_irqchip(struct kvm *kvm);
extern int irqchip_in_kernel(struct kvm *kvm);
extern void kvm_pic_reset(struct kvm_kpic_state *s);
extern void kvm_inject_pit_timer_irqs(struct kvm_vcpu *vcpu);
extern void kvm_inject_pending_timer_irqs(struct kvm_vcpu *);
extern void kvm_inject_apic_timer_irqs(struct kvm_vcpu *);
extern void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *);
extern int pit_has_pending_timer(struct kvm_vcpu *);
extern int apic_has_pending_timer(struct kvm_vcpu *);
#endif
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