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/*

 * Project: S.Ha.R.K.

 *

 * Coordinators:

 *   Giorgio Buttazzo    <giorgio@sssup.it>

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *

 * Authors     :

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *   (see the web pages for full authors list)

 *

 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)

 *

 * http://www.sssup.it

 * http://retis.sssup.it

 * http://shark.sssup.it

 */

/**

 ------------

 CVS :        $Id: edfstar.c,v 1.1 2002-09-02 10:29:30 pj Exp $

 File:        $File$

 Revision:    $Revision: 1.1 $

 Last update: $Date: 2002-09-02 10:29:30 $

 ------------

**/

/*

 * Copyright (C) 2001 Paolo Gai

 *

 * 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, or

 * (at your option) any later version.

 *

 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */

#include "edfstar.h"

#include <ll/stdio.h>

#include <ll/string.h>

#include <kernel/model.h>

#include <kernel/descr.h>

#include <kernel/var.h>

#include <kernel/func.h>

#include <kernel/trace.h>

/* for iqueues */

#include "iqueue.h"

/* for BUDGET_TASK_MODEL */

#include "cbsstar.h"

/*

 * DEBUG stuffs begin

 */

//#define EDFSTAR_DEBUG

#ifdef EDFSTAR_DEBUF

static __inline__ fake_printf(char *fmt, ...) {}

#define edfstar_printf fake_printf

#define edfstar_printf2 fake_printf

#define edfstar_printf3 fake_printf

//#define edfstar_printf kern_printf

//#define edfstar_printf2 kern_printf

//#define edfstar_printf3 kern_printf

#endif

/*

 * DEBUG stuffs end

 */

/* Status used in the level */

#define EDFSTAR_READY         MODULE_STATUS_BASE    /* - Ready status        */

#define EDFSTAR_IDLE          MODULE_STATUS_BASE+4  /* to wait the deadline  */

/* flags */

#define EDFSTAR_FLAG_NORAISEEXC  2

/* the level redefinition for the Earliest Deadline First level */

typedef struct {

  level_des l;     /* the standard level descriptor          */

  TIME period[MAX_PROC]; /* The task periods; the deadlines are

                       stored in the priority field           */

  int deadline_timer[MAX_PROC];

                   /* The task deadline timers               */

  struct timespec deadline_timespec[MAX_PROC];

  int dline_miss[MAX_PROC]; /* Deadline miss counter */

  int wcet_miss[MAX_PROC];  /* Wcet miss counter */

  int nact[MAX_PROC];       /* Wcet miss counter */

  int flag[MAX_PROC];

                   /* used to manage the JOB_TASK_MODEL and the

                       periodicity                            */

  IQUEUE ready;     /* the ready queue                        */

  PID activated;   /* the task that has been inserted into the

                       master module */

  int budget;

  int scheduling_level;

} EDFSTAR_level_des;

static void EDFSTAR_check_preemption(EDFSTAR_level_des *lev)

{

  PID first;

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:chk)");

#endif

  if ((first = iq_queryfirst(&lev->ready)) != lev->activated) {

    if (lev->activated != NIL)

      level_table[ lev->scheduling_level ]->

        guest_end(lev->scheduling_level, lev->activated);

    lev->activated = first;

    if (first != NIL) {

      BUDGET_TASK_MODEL b;

      budget_task_default_model(b, lev->budget);

      level_table[ lev->scheduling_level ]->

        guest_create(lev->scheduling_level, first, (TASK_MODEL *)&b);

    }

  }

}

static void EDFSTAR_timer_deadline(void *par);

static void EDFSTAR_internal_activate(EDFSTAR_level_des *lev, PID p)

{

  struct timespec temp;

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:iact)");

#endif

  TIMESPEC_ASSIGN(&temp, &proc_table[p].request_time);

  ADDUSEC2TIMESPEC(lev->period[p], &temp);

  *iq_query_timespec(p, &lev->ready) = temp;

  lev->deadline_timespec[p] = temp;

  /* Insert task in the correct position */

  proc_table[p].status = EDFSTAR_READY;

  iq_timespec_insert(p,&lev->ready);

  /* needed because when there is a wcet miss I disable CONTROL_CAP */

  proc_table[p].control |= CONTROL_CAP;

  /* check for preemption */

  EDFSTAR_check_preemption(lev);

}

static char *EDFSTAR_status_to_a(WORD status)

{

  if (status < MODULE_STATUS_BASE)

    return status_to_a(status);

  switch (status) {

    case EDFSTAR_READY    : return "EDFSTAR_Ready";

    case EDFSTAR_IDLE     : return "EDFSTAR_Idle";

    default               : return "EDFSTAR_Unknown";

  }

}

static void EDFSTAR_timer_deadline(void *par)

{

  PID p = (PID) par;

  EDFSTAR_level_des *lev;

#ifdef EDFSTAR_DEBUG

//  edfstar_printf("(E:tdl ");

#endif

  lev = (EDFSTAR_level_des *)level_table[proc_table[p].task_level];

  switch (proc_table[p].status) {

    case EDFSTAR_IDLE:

#ifdef EDFSTAR_DEBUG

//      edfstar_printf2("I%d",p);

#endif

      /* set the request time */

      proc_table[p].request_time = *iq_query_timespec(p, &lev->ready);

      EDFSTAR_internal_activate(lev,p);

      event_need_reschedule();

      break;

    default:

#ifdef EDFSTAR_DEBUG

//      edfstar_printf2("D%d",p);

#endif

      /* else, a deadline miss occurred!!! */

      lev->dline_miss[p]++;

      /* the task is into another state */

      lev->nact[p]++;

      /* Set the deadline timer */

      ADDUSEC2TIMESPEC(lev->period[p], &lev->deadline_timespec[p]);

  }

  /* Set the deadline timer */

  lev->deadline_timer[p] = kern_event_post(&lev->deadline_timespec[p],

                                           EDFSTAR_timer_deadline,

                                           (void *)p);

#ifdef EDFSTAR_DEBUG

//  edfstar_printf(")");

#endif

}

static void EDFSTAR_timer_guest_deadline(void *par)

{

  PID p = (PID) par;

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:gdl)");

#endif

  kern_raise(XDEADLINE_MISS,p);

}

static int EDFSTAR_level_accept_task_model(LEVEL l, TASK_MODEL *m)

{

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:lacct)");

#endif

  if (m->pclass == HARD_PCLASS || m->pclass == (HARD_PCLASS | l)) {

    HARD_TASK_MODEL *h = (HARD_TASK_MODEL *)m;

    if (h->wcet && h->mit && h->periodicity == PERIODIC)

      return 0;

  }

  return -1;

}

static int EDFSTAR_level_accept_guest_model(LEVEL l, TASK_MODEL *m)

{

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:laccg)");

#endif

  if (m->pclass == JOB_PCLASS || m->pclass == (JOB_PCLASS | l))

    return 0;

  else

    return -1;

}

static char *onoff(int i)

{

  if (i)

    return "On ";

  else

    return "Off";

}

static void EDFSTAR_level_status(LEVEL l)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  PID p = iq_queryfirst(&lev->ready);

  struct timespec temp;

  kern_printf("Budget number     : %u\n", lev->budget);

  kern_printf("Master level      : %u\n", lev->scheduling_level);

  kern_printf("Active PID        : %u\n", lev->activated);

  while (p != NIL) {

    if ((proc_table[p].pclass) == JOB_PCLASS)

      kern_printf("Pid: %2d (GUEST)\n", p);

    else {

      temp = *iq_query_timespec(p, &lev->ready);

      kern_printf("Pid: %2d Name: %10s %s: %9ld Dline: %9ld.%6ld Stat: %s\n",

                  p,

                  proc_table[p].name,

                  "Period  ",

                  lev->period[p],

                  temp.tv_sec,

                  temp.tv_nsec/1000,

                  EDFSTAR_status_to_a(proc_table[p].status));

      p = proc_table[p].next;

    }

  }

  for (p=0; p<MAX_PROC; p++)

    if (proc_table[p].task_level == l

        && proc_table[p].status != EDFSTAR_READY

        && proc_table[p].status != FREE ) {

      temp = *iq_query_timespec(p, &lev->ready);

      kern_printf("Pid: %2d Name: %10s %s: %9ld Dline: %9ld.%6ld Stat: %s\n",

                  p,

                  proc_table[p].name,

                  "Period  ",

                  lev->period[p],

                  temp.tv_sec,

                  temp.tv_nsec/1000,

                  EDFSTAR_status_to_a(proc_table[p].status));

    }

}

/* The scheduler only gets the first task in the queue */

static PID EDFSTAR_level_scheduler(LEVEL l)

{

  //EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  return NIL;

}

static int EDFSTAR_task_create(LEVEL l, PID p, TASK_MODEL *m)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  /* if the EDFSTAR_task_create is called, then the pclass must be a

     valid pclass. */

  HARD_TASK_MODEL *h = (HARD_TASK_MODEL *)m;

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:tcr)");

#endif

  lev->period[p] = h->mit;

  lev->flag[p] = 0;

  lev->deadline_timer[p] = -1;

  lev->dline_miss[p]     = 0;

  lev->wcet_miss[p]      = 0;

  lev->nact[p]           = 0;

  /* Enable wcet check */

  proc_table[p].avail_time = h->wcet;

  proc_table[p].wcet       = h->wcet;

  proc_table[p].control |= CONTROL_CAP;

  return 0; /* OK, also if the task cannot be guaranteed... */

}

static void EDFSTAR_task_detach(LEVEL l, PID p)

{

#ifdef EDFSTAR_DEBUG

  edfstar_printf2("(E:tdt)");

#endif

}

static int EDFSTAR_task_eligible(LEVEL l, PID p)

{

#ifdef EDFSTAR_DEBUG

  edfstar_printf2("(E:eli)");

#endif

  return 0; /* if the task p is chosen, it is always eligible */

}

static void EDFSTAR_task_dispatch(LEVEL l, PID p, int nostop)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:dis)");

  edfstar_printf3("(%d %d)",

                  iq_query_timespec(p, &lev->ready)->tv_nsec/1000000,

                  schedule_time.tv_nsec/1000000);

#endif

  level_table[ lev->scheduling_level ]->

    guest_dispatch(lev->scheduling_level,p,nostop);

}

static void EDFSTAR_task_epilogue(LEVEL l, PID p)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:epi ");

#endif

  /* check if the wcet is finished... */

  if (proc_table[p].avail_time <= 0 && proc_table[p].control&CONTROL_CAP) {

    /* wcet finished: disable wcet event and count wcet miss */

#ifdef EDFSTAR_DEBUG

    edfstar_printf2("W%d",p);

#endif

    proc_table[p].control &= ~CONTROL_CAP;

    lev->wcet_miss[p]++;

  }

#ifdef EDFSTAR_DEBUG

  edfstar_printf(")");

#endif

  level_table[ lev->scheduling_level ]->

    guest_epilogue(lev->scheduling_level,p);

  proc_table[p].status = EDFSTAR_READY;

}

static void EDFSTAR_task_activate(LEVEL l, PID p)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:act)");

#endif

  /* Test if we are trying to activate a non sleeping task    */

  /* save activation (only if needed... */

  if (proc_table[p].status != SLEEP) {

    /* a periodic task cannot be activated when it is already active */

    kern_raise(XACTIVATION,p);

    return;

  }

  ll_gettime(TIME_EXACT, &proc_table[p].request_time);

  EDFSTAR_internal_activate(lev,p);

  /* Set the deadline timer */

  lev->deadline_timer[p] = kern_event_post(&lev->deadline_timespec[p],

                                           EDFSTAR_timer_deadline,

                                           (void *)p);

}

static void EDFSTAR_task_insert(LEVEL l, PID p)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:ins)");

#endif

  /* Insert task in the correct position */

  proc_table[p].status = EDFSTAR_READY;

  iq_timespec_insert(p,&lev->ready);

  /* and check for preemption! */

  EDFSTAR_check_preemption(lev);

}

static void EDFSTAR_task_extract(LEVEL l, PID p)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:ext)");

#endif

  /* the task is blocked on a synchronization primitive. we have to

     remove it from the master module -and- from the local queue! */

  iq_extract(p,&lev->ready);

  /* and finally, a preemption check! (it will also call guest_end) */

  EDFSTAR_check_preemption(lev);

}

static void EDFSTAR_task_endcycle(LEVEL l, PID p)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  struct timespec temp;

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:ecy ");

#endif

  /* we call guest_end directly here because the same task may

     be reinserted in the queue before calling the preemption check! */

  level_table[ lev->scheduling_level ]->

    guest_end(lev->scheduling_level,p);

  lev->activated = NIL;

  iq_extract(p,&lev->ready);

  /* we reset the capacity counters... */

  proc_table[p].avail_time = proc_table[p].wcet;

  if (lev->nact[p] > 0) {

#ifdef EDFSTAR_DEBUG

    edfstar_printf2("E%d",p);

#endif

    /* Pending activation: reactivate the thread!!! */

    lev->nact[p]--;

    /* see also EDFSTAR_timer_deadline */

    ll_gettime(TIME_EXACT, &proc_table[p].request_time);

    EDFSTAR_internal_activate(lev,p);

    /* check if the deadline has already expired */

    temp = *iq_query_timespec(p, &lev->ready);

    if (TIMESPEC_A_LT_B(&temp, &schedule_time)) {

      /* count the deadline miss */

      lev->dline_miss[p]++;

      event_delete(lev->deadline_timer[p]);

    }

  }

  else {

#ifdef EDFSTAR_DEBUG

    edfstar_printf("e%d",p);

#endif

    /* the task has terminated his job before it consume the wcet. All OK! */

    proc_table[p].status = EDFSTAR_IDLE;

    /* and finally, a preemption check! */

    EDFSTAR_check_preemption(lev);

    /* when the deadline timer fire, it recognize the situation and set

       correctly all the stuffs (like reactivation, request_time, etc... ) */

  }

#ifdef EDFSTAR_DEBUG

  edfstar_printf(")");

#endif

}

static void EDFSTAR_task_end(LEVEL l, PID p)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

#ifdef EDFSTAR_DEBUG

  edfstar_printf("(E:end)");

#endif

  iq_extract(p,&lev->ready);

  /* we finally put the task in the ready queue */

  proc_table[p].status = FREE;

  q_insertfirst(p,&freedesc);

  if (lev->deadline_timer[p] != -1) {

    event_delete(lev->deadline_timer[p]);

  }

  /* and finally, a preemption check! (it will also call guest_end) */

  EDFSTAR_check_preemption(lev);

}

static void EDFSTAR_task_sleep(LEVEL l, PID p)

{ kern_raise(XUNVALID_TASK,exec_shadow); }

static void EDFSTAR_task_delay(LEVEL l, PID p, TIME usdelay)

{ kern_raise(XUNVALID_TASK,exec_shadow); }

/* Guest Functions

   These functions manages a JOB_TASK_MODEL, that is used to put

   a guest task in the EDFSTAR ready queue. */

static int EDFSTAR_guest_create(LEVEL l, PID p, TASK_MODEL *m)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  JOB_TASK_MODEL *job = (JOB_TASK_MODEL *)m;

  /* if the EDFSTAR_guest_create is called, then the pclass must be a

     valid pclass. */

  *iq_query_timespec(p, &lev->ready) = job->deadline;

  lev->deadline_timer[p] = -1;

  lev->dline_miss[p]     = 0;

  lev->wcet_miss[p]      = 0;

  lev->nact[p]           = 0;

  if (job->noraiseexc)

    lev->flag[p] = EDFSTAR_FLAG_NORAISEEXC;

  else

    lev->flag[p] = 0;

  lev->period[p] = job->period;

  /* there is no bandwidth guarantee at this level, it is performed

     by the level that inserts guest tasks... */

  return 0; /* OK, also if the task cannot be guaranteed... */

}

static void EDFSTAR_guest_detach(LEVEL l, PID p)

{

  /* the EDFSTAR level doesn't introduce any dinamic allocated new field.

     No guarantee is performed on guest tasks... so we don't have to reset

     the NO_GUARANTEE FIELD */

}

static void EDFSTAR_guest_dispatch(LEVEL l, PID p, int nostop)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  level_table[ lev->scheduling_level ]->

    guest_dispatch(lev->scheduling_level,p,nostop);

}

static void EDFSTAR_guest_epilogue(LEVEL l, PID p)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  /* the task has been preempted. it returns into the ready queue... */

  level_table[ lev->scheduling_level ]->

    guest_epilogue(lev->scheduling_level,p);

  proc_table[p].status = EDFSTAR_READY;

}

static void EDFSTAR_guest_activate(LEVEL l, PID p)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  /* Insert task in the correct position */

  iq_timespec_insert(p,&lev->ready);

  proc_table[p].status = EDFSTAR_READY;

  /* check for preemption */

  EDFSTAR_check_preemption(lev);

  /* Set the deadline timer */

  if (!(lev->flag[p] & EDFSTAR_FLAG_NORAISEEXC))

    lev->deadline_timer[p] = kern_event_post(iq_query_timespec(p, &lev->ready),

                                             EDFSTAR_timer_guest_deadline,

                                             (void *)p);

}

static void EDFSTAR_guest_insert(LEVEL l, PID p)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  /* Insert task in the correct position */

  iq_timespec_insert(p,&lev->ready);

  proc_table[p].status = EDFSTAR_READY;

  /* and check for preemption! */

  EDFSTAR_check_preemption(lev);

}

static void EDFSTAR_guest_extract(LEVEL l, PID p)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  /* the task is blocked on a synchronization primitive. we have to

     remove it from the master module -and- from the local queue! */

  iq_extract(p,&lev->ready);

  /* and finally, a preemption check! (it will also call guest_end() */

  EDFSTAR_check_preemption(lev);

}

static void EDFSTAR_guest_end(LEVEL l, PID p)

{

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

#ifdef EDFSTAR_DEBUG

  //kern_printf("EDFSTAR_guest_end: dline timer %d\n",lev->deadline_timer[p]);

#endif

  iq_extract(p, &lev->ready);

  /* we remove the deadline timer, because the slice is finished */

  if (lev->deadline_timer[p] != NIL) {

#ifdef EDFSTAR_DEBUG

//    kern_printf("EDFSTAR_guest_end: dline timer %d\n",lev->deadline_timer[p]);

#endif

    event_delete(lev->deadline_timer[p]);

    lev->deadline_timer[p] = NIL;

  }

  /* and finally, a preemption check! (it will also call guest_end() */

  EDFSTAR_check_preemption(lev);

}

static void EDFSTAR_guest_endcycle(LEVEL l, PID p)

{ kern_raise(XUNVALID_GUEST,exec_shadow); }

static void EDFSTAR_guest_sleep(LEVEL l, PID p)

{ kern_raise(XUNVALID_GUEST,exec_shadow); }

static void EDFSTAR_guest_delay(LEVEL l, PID p, TIME usdelay)

{ kern_raise(XUNVALID_GUEST,exec_shadow); }

/* Registration functions */

/* Registration function:

    int flags                 the init flags ... see EDFSTAR.h */

LEVEL EDFSTAR_register_level(int budget, int master)

{

  LEVEL l;            /* the level that we register */

  EDFSTAR_level_des *lev;  /* for readableness only */

  PID i;              /* a counter */

#ifdef EDFSTAR_DEBUG

  printk("EDFSTAR_register_level\n");

#endif

  /* request an entry in the level_table */

  l = level_alloc_descriptor();

#ifdef EDFSTAR_DEBUG

  printk("    alloco descrittore %d %d\n",l,(int)sizeof(EDFSTAR_level_des));

#endif

  /* alloc the space needed for the EDFSTAR_level_des */

  lev = (EDFSTAR_level_des *)kern_alloc(sizeof(EDFSTAR_level_des));

#ifdef EDFSTAR_DEBUG

  printk("    lev=%d\n",(int)lev);

#endif

  /* update the level_table with the new entry */

  level_table[l] = (level_des *)lev;

  /* fill the standard descriptor */

  strncpy(lev->l.level_name,  EDFSTAR_LEVELNAME, MAX_LEVELNAME);

  lev->l.level_code               = EDFSTAR_LEVEL_CODE;

  lev->l.level_version            = EDFSTAR_LEVEL_VERSION;

  lev->l.level_accept_task_model  = EDFSTAR_level_accept_task_model;

  lev->l.level_accept_guest_model = EDFSTAR_level_accept_guest_model;

  lev->l.level_status             = EDFSTAR_level_status;

  lev->l.level_scheduler          = EDFSTAR_level_scheduler;

  lev->l.level_guarantee          = NULL;

  lev->l.task_create              = EDFSTAR_task_create;

  lev->l.task_detach              = EDFSTAR_task_detach;

  lev->l.task_eligible            = EDFSTAR_task_eligible;

  lev->l.task_dispatch            = EDFSTAR_task_dispatch;

  lev->l.task_epilogue            = EDFSTAR_task_epilogue;

  lev->l.task_activate            = EDFSTAR_task_activate;

  lev->l.task_insert              = EDFSTAR_task_insert;

  lev->l.task_extract             = EDFSTAR_task_extract;

  lev->l.task_endcycle            = EDFSTAR_task_endcycle;

  lev->l.task_end                 = EDFSTAR_task_end;

  lev->l.task_sleep               = EDFSTAR_task_sleep;

  lev->l.task_delay               = EDFSTAR_task_delay;

  lev->l.guest_create             = EDFSTAR_guest_create;

  lev->l.guest_detach             = EDFSTAR_guest_detach;

  lev->l.guest_dispatch           = EDFSTAR_guest_dispatch;

  lev->l.guest_epilogue           = EDFSTAR_guest_epilogue;

  lev->l.guest_activate           = EDFSTAR_guest_activate;

  lev->l.guest_insert             = EDFSTAR_guest_insert;

  lev->l.guest_extract            = EDFSTAR_guest_extract;

  lev->l.guest_endcycle           = EDFSTAR_guest_endcycle;

  lev->l.guest_end                = EDFSTAR_guest_end;

  lev->l.guest_sleep              = EDFSTAR_guest_sleep;

  lev->l.guest_delay              = EDFSTAR_guest_delay;

  /* fill the EDFSTAR descriptor part */

  for(i=0; i<MAX_PROC; i++) {

    lev->period[i]         = 0;

    lev->deadline_timer[i] = -1;

    lev->flag[i]           = 0;

    lev->dline_miss[i]     = 0;

    lev->wcet_miss[i]      = 0;

    lev->nact[i]           = 0;

  }

  iq_init(&lev->ready, NULL, IQUEUE_NO_PRIORITY);

  lev->activated = NIL;

  lev->budget = budget;

  lev->scheduling_level = master;

  return l;

}

int EDFSTAR_get_dline_miss(PID p)

{

  LEVEL l = proc_table[p].task_level;

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  if (lev->l.level_code    == EDFSTAR_LEVEL_CODE &&

      lev->l.level_version == EDFSTAR_LEVEL_VERSION)

    return lev->dline_miss[p];

  else

    return -1;

}

int EDFSTAR_get_wcet_miss(PID p)

{

  LEVEL l = proc_table[p].task_level;

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  if (lev->l.level_code    == EDFSTAR_LEVEL_CODE &&

      lev->l.level_version == EDFSTAR_LEVEL_VERSION)

    return lev->wcet_miss[p];

  else

    return -1;

}

int EDFSTAR_get_nact(PID p)

{

  LEVEL l = proc_table[p].task_level;

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);

  if (lev->l.level_code    == EDFSTAR_LEVEL_CODE &&

      lev->l.level_version == EDFSTAR_LEVEL_VERSION)

    return lev->nact[p];

  else

    return -1;

}

int EDFSTAR_reset_dline_miss(PID p)

{

  LEVEL l = proc_table[p].task_level;

  EDFSTAR_level_des *lev = (EDFSTAR_level_des *)(level_table[l]);