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#ifndef __SCHED_H__
#define __SCHED_H__

#include <xen/config.h>
#include <xen/types.h>
#include <xen/spinlock.h>
#include <xen/smp.h>
#include <xen/shared.h>
#include <public/xen.h>
#include <public/domctl.h>
#include <public/sysctl.h>
#include <public/vcpu.h>
#include <public/xsm/acm.h>
#include <xen/time.h>
#include <xen/timer.h>
#include <xen/grant_table.h>
#include <xen/rangeset.h>
#include <xen/domain.h>
#include <xen/xenoprof.h>
#include <xen/rcupdate.h>
#include <xen/irq.h>
#include <xen/mm.h>
#include <xen/tasklet.h>
#include <public/mem_event.h>
#include <xen/cpumask.h>
#include <xen/nodemask.h>
#include <xen/multicall.h>

#ifdef CONFIG_COMPAT
#include <compat/vcpu.h>
DEFINE_XEN_GUEST_HANDLE(vcpu_runstate_info_compat_t);
#endif

/* A global pointer to the initial domain (DOM0). */
extern struct domain *dom0;

#ifndef CONFIG_COMPAT
#define BITS_PER_EVTCHN_WORD(d) BITS_PER_LONG
#else
#define BITS_PER_EVTCHN_WORD(d) (has_32bit_shinfo(d) ? 32 : BITS_PER_LONG)
#endif
#define MAX_EVTCHNS(d) (BITS_PER_EVTCHN_WORD(d) * BITS_PER_EVTCHN_WORD(d))
#define EVTCHNS_PER_BUCKET 128
#define NR_EVTCHN_BUCKETS  (NR_EVENT_CHANNELS / EVTCHNS_PER_BUCKET)

struct evtchn
{
#define ECS_FREE         0 /* Channel is available for use.                  */
#define ECS_RESERVED     1 /* Channel is reserved.                           */
#define ECS_UNBOUND      2 /* Channel is waiting to bind to a remote domain. */
#define ECS_INTERDOMAIN  3 /* Channel is bound to another domain.            */
#define ECS_PIRQ         4 /* Channel is bound to a physical IRQ line.       */
#define ECS_VIRQ         5 /* Channel is bound to a virtual IRQ line.        */
#define ECS_IPI          6 /* Channel is bound to a virtual IPI line.        */
    u8  state;             /* ECS_* */
    u8  consumer_is_xen;   /* Consumed by Xen or by guest? */
    u16 notify_vcpu_id;    /* VCPU for local delivery notification */
    union {
        struct {
            domid_t remote_domid;
        } unbound;     /* state == ECS_UNBOUND */
        struct {
            u16            remote_port;
            struct domain *remote_dom;
        } interdomain; /* state == ECS_INTERDOMAIN */
        struct {
            u16            irq;
            u16            next_port;
            u16            prev_port;
        } pirq;        /* state == ECS_PIRQ */
        u16 virq;      /* state == ECS_VIRQ */
    } u;
#ifdef FLASK_ENABLE
    void *ssid;
#endif
};

int  evtchn_init(struct domain *d); /* from domain_create */
void evtchn_destroy(struct domain *d); /* from domain_kill */
void evtchn_destroy_final(struct domain *d); /* from complete_domain_destroy */

struct waitqueue_vcpu;

struct vcpu 
{
    int              vcpu_id;

    int              processor;

    vcpu_info_t     *vcpu_info;

    struct domain   *domain;

    struct vcpu     *next_in_list;

    s_time_t         periodic_period;
    s_time_t         periodic_last_event;
    struct timer     periodic_timer;
    struct timer     singleshot_timer;

    struct timer     poll_timer;    /* timeout for SCHEDOP_poll */

    void            *sched_priv;    /* scheduler-specific data */

    struct vcpu_runstate_info runstate;
#ifndef CONFIG_COMPAT
# define runstate_guest(v) ((v)->runstate_guest)
    XEN_GUEST_HANDLE(vcpu_runstate_info_t) runstate_guest; /* guest address */
#else
# define runstate_guest(v) ((v)->runstate_guest.native)
    union {
        XEN_GUEST_HANDLE(vcpu_runstate_info_t) native;
        XEN_GUEST_HANDLE(vcpu_runstate_info_compat_t) compat;
    } runstate_guest; /* guest address */
#endif

    /* last time when vCPU is scheduled out */
    uint64_t last_run_time;

    /* Has the FPU been initialised? */
    bool_t           fpu_initialised;
    /* Has the FPU been used since it was last saved? */
    bool_t           fpu_dirtied;
    /* Initialization completed for this VCPU? */
    bool_t           is_initialised;
    /* Currently running on a CPU? */
    bool_t           is_running;
    /* VCPU should wake fast (do not deep sleep the CPU). */
    bool_t           is_urgent;

#ifdef VCPU_TRAP_LAST
#define VCPU_TRAP_NONE    0
    struct {
        bool_t           pending;
        uint8_t          old_mask;
    }                async_exception_state[VCPU_TRAP_LAST];
#define async_exception_state(t) async_exception_state[(t)-1]
    uint8_t          async_exception_mask;
#endif

    /* Require shutdown to be deferred for some asynchronous operation? */
    bool_t           defer_shutdown;
    /* VCPU is paused following shutdown request (d->is_shutting_down)? */
    bool_t           paused_for_shutdown;

    /*
     * > 0: a single port is being polled;
     * = 0: nothing is being polled (vcpu should be clear in d->poll_mask);
     * < 0: multiple ports may be being polled.
     */
    int              poll_evtchn;

    /* (over-)protected by ->domain->event_lock */
    int              pirq_evtchn_head;

    unsigned long    pause_flags;
    atomic_t         pause_count;

    /* IRQ-safe virq_lock protects against delivering VIRQ to stale evtchn. */
    u16              virq_to_evtchn[NR_VIRQS];
    spinlock_t       virq_lock;

    /* Bitmask of CPUs on which this VCPU may run. */
    cpumask_t        cpu_affinity;
    /* Used to change affinity temporarily. */
    cpumask_t        cpu_affinity_tmp;

    /* Bitmask of CPUs which are holding onto this VCPU's state. */
    cpumask_t        vcpu_dirty_cpumask;

    /* Tasklet for continue_hypercall_on_cpu(). */
    struct tasklet   continue_hypercall_tasklet;

    /* Multicall information. */
    struct mc_state  mc_state;

    struct waitqueue_vcpu *waitqueue_vcpu;

    struct arch_vcpu arch;
};

/* Per-domain lock can be recursively acquired in fault handlers. */
#define domain_lock(d) spin_lock_recursive(&(d)->domain_lock)
#define domain_unlock(d) spin_unlock_recursive(&(d)->domain_lock)
#define domain_is_locked(d) spin_is_locked(&(d)->domain_lock)

/* Memory event */
struct mem_event_domain
{
    /* ring lock */
    spinlock_t ring_lock;
    /* shared page */
    mem_event_shared_page_t *shared_page;
    /* shared ring page */
    void *ring_page;
    /* front-end ring */
    mem_event_front_ring_t front_ring;
    /* event channel port (vcpu0 only) */
    int xen_port;
};

struct domain
{
    domid_t          domain_id;

    shared_info_t   *shared_info;     /* shared data area */

    spinlock_t       domain_lock;

    spinlock_t       page_alloc_lock; /* protects all the following fields  */
    struct page_list_head page_list;  /* linked list, of size tot_pages     */
    struct page_list_head xenpage_list; /* linked list (size xenheap_pages) */
    unsigned int     tot_pages;       /* number of pages currently possesed */
    unsigned int     max_pages;       /* maximum value for tot_pages        */
    atomic_t         shr_pages;       /* number of shared pages             */
    unsigned int     xenheap_pages;   /* # pages allocated from Xen heap    */

    unsigned int     max_vcpus;

    /* Scheduling. */
    void            *sched_priv;    /* scheduler-specific data */
    struct cpupool  *cpupool;

    struct domain   *next_in_list;
    struct domain   *next_in_hashbucket;