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/*

 * 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>

 *

 */

#ifndef __IRQ_H

#define __IRQ_H

#include "kvm.h"

typedef void irq_request_func(void *opaque, int level);

struct kvm_kpic_state {

        u8 last_irr;    /* edge detection */

        u8 irr;         /* interrupt request register */

        u8 imr;         /* interrupt mask register */

        u8 isr;         /* interrupt service register */

        u8 priority_add;        /* highest irq priority */

        u8 irq_base;

        u8 read_reg_select;

        u8 poll;

        u8 special_mask;

        u8 init_state;

        u8 auto_eoi;

        u8 rotate_on_auto_eoi;

        u8 special_fully_nested_mode;

        u8 init4;               /* true if 4 byte init */

        u8 elcr;                /* PIIX edge/trigger selection */

        u8 elcr_mask;

        struct kvm_pic *pics_state;

};

struct kvm_pic {

        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;

};

struct kvm_pic *kvm_create_pic(struct kvm *kvm);

void kvm_pic_set_irq(void *opaque, int irq, int level);

int kvm_pic_read_irq(struct kvm_pic *s);

int kvm_cpu_get_interrupt(struct kvm_vcpu *v);

int kvm_cpu_has_interrupt(struct kvm_vcpu *v);

void kvm_pic_update_irq(struct kvm_pic *s);

#define IOAPIC_NUM_PINS  KVM_IOAPIC_NUM_PINS

#define IOAPIC_VERSION_ID 0x11  /* IOAPIC version */

#define IOAPIC_EDGE_TRIG  0

#define IOAPIC_LEVEL_TRIG 1

#define IOAPIC_DEFAULT_BASE_ADDRESS  0xfec00000

#define IOAPIC_MEM_LENGTH            0x100

/* Direct registers. */

#define IOAPIC_REG_SELECT  0x00

#define IOAPIC_REG_WINDOW  0x10

#define IOAPIC_REG_EOI     0x40 /* IA64 IOSAPIC only */

/* Indirect registers. */

#define IOAPIC_REG_APIC_ID 0x00 /* x86 IOAPIC only */

#define IOAPIC_REG_VERSION 0x01

#define IOAPIC_REG_ARB_ID  0x02 /* x86 IOAPIC only */

struct kvm_ioapic {

        u64 base_address;

        u32 ioregsel;

        u32 id;

        u32 irr;

        u32 pad;

        union ioapic_redir_entry {

                u64 bits;

                struct {

                        u8 vector;

                        u8 delivery_mode:3;

                        u8 dest_mode:1;

                        u8 delivery_status:1;

                        u8 polarity:1;

                        u8 remote_irr:1;

                        u8 trig_mode:1;

                        u8 mask:1;

                        u8 reserve:7;

                        u8 reserved[4];

                        u8 dest_id;

                } fields;

        } redirtbl[IOAPIC_NUM_PINS];

        struct kvm_io_device dev;

        struct kvm *kvm;

};

struct kvm_lapic {

        unsigned long base_address;

        struct kvm_io_device dev;

        struct {

                atomic_t pending;

                s64 period;     /* unit: ns */

                u32 divide_count;

                ktime_t last_update;

                struct hrtimer dev;

        } timer;

        struct kvm_vcpu *vcpu;

        struct page *regs_page;

        void *regs;

};

#ifdef DEBUG

#define ASSERT(x)                                                       \

do {                                                                    \

        if (!(x)) {                                                     \

                printk(KERN_EMERG "assertion failed %s: %d: %s\n",      \

                       __FILE__, __LINE__, #x);                         \

                BUG();                                                  \

        }                                                               \

} while (0)

#else

#define ASSERT(x) do { } while (0)

#endif

void kvm_vcpu_kick(struct kvm_vcpu *vcpu);

int kvm_apic_has_interrupt(struct kvm_vcpu *vcpu);

int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu);

int kvm_get_apic_interrupt(struct kvm_vcpu *vcpu);

int kvm_create_lapic(struct kvm_vcpu *vcpu);

void kvm_lapic_reset(struct kvm_vcpu *vcpu);

void kvm_free_apic(struct kvm_lapic *apic);

u64 kvm_lapic_get_cr8(struct kvm_vcpu *vcpu);

void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, unsigned long cr8);

void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value);

struct kvm_lapic *kvm_apic_round_robin(struct kvm *kvm, u8 vector,

                                       unsigned long bitmap);

u64 kvm_get_apic_base(struct kvm_vcpu *vcpu);

void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data);

int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest);

void kvm_ioapic_update_eoi(struct kvm *kvm, int vector);

int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda);

int kvm_apic_set_irq(struct kvm_lapic *apic, u8 vec, u8 trig);

void kvm_apic_post_state_restore(struct kvm_vcpu *vcpu);

int kvm_ioapic_init(struct kvm *kvm);

void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level);

int kvm_lapic_enabled(struct kvm_vcpu *vcpu);

int kvm_lapic_find_highest_irr(struct kvm_vcpu *vcpu);

void kvm_apic_timer_intr_post(struct kvm_vcpu *vcpu, int vec);

void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec);

void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu);

void kvm_inject_apic_timer_irqs(struct kvm_vcpu *vcpu);

void kvm_migrate_apic_timer(struct kvm_vcpu *vcpu);

#endif