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/*
* Project: S.Ha.R.K.
*
* Coordinators:
* Giorgio Buttazzo <giorgio@sssup.it>
* Paolo Gai <pj@gandalf.sssup.it>
*
* Authors :
* Trimarchi Michael <trimarchi@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
*/
/*
* Copyright (C) 2000 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 WARR2ANTY; without even the implied waRR2anty 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 <arch/stdio.h>
#include <arch/string.h>
#include <kernel/model.h>
#include <kernel/descr.h>
#include <kernel/var.h>
#include <kernel/func.h>
#include "mpegstar.h"
#include "fsf_contract.h"
#include "fsf_server.h"
//#define MPEGSTAR_DEBUG
/*+ Status used in the level +*/
#define MPEGSTAR_READY MODULE_STATUS_BASE
#define FRAME_IDLE 0
#define FRAME_DECODING 1
#define FRAME_SKIPPED 2
typedef struct {
level_des l; /*+ the standard level descriptor +*/
int server_Q;
int server_T;
int budget;
int current;
int status;
int scheduling_level;
} MPEGSTAR_level_des;
static int MPEGSTAR_public_eligible(LEVEL l, PID p)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
return level_table[ lev->scheduling_level ]->
private_eligible(lev->scheduling_level,p);
return 0;
}
static int MPEGSTAR_public_create(LEVEL l, PID p, TASK_MODEL *m)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
#ifdef MPEGSTAR_DEBUG
kern_printf("(MP:Crt:%d)",p);
#endif
if (m->pclass != HARD_PCLASS) return -1;
if (m->level != 0 && m->level != l) return -1;
if (lev->current != NIL) return -1;
lev->current = p;
lev->status = FRAME_IDLE;
proc_table[p].avail_time = lev->server_Q;
proc_table[p].wcet = lev->server_Q;
proc_table[p].control = (proc_table[p].control & ~CONTROL_CAP);
return 0; /* OK */
}
static void MPEGSTAR_public_dispatch(LEVEL l, PID p, int nostop)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
#ifdef MPEGSTAR_DEBUG
kern_printf("(MS:Dsp:%d)",p);
#endif
if (!nostop) {
level_table[ lev->scheduling_level ] ->
private_dispatch(lev->scheduling_level, p, nostop);
}
}
static void MPEGSTAR_public_epilogue(LEVEL l, PID p)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
int r;
#ifdef MPEGSTAR_DEBUG
kern_printf("(MS:Epi:%d)",p);
#endif
level_table[ lev->scheduling_level ] ->
private_epilogue(lev->scheduling_level,p);
r = SERVER_get_remain_capacity(lev->scheduling_level,lev->budget);
if (r < 0) {
#ifdef MPEGSTAR_DEBUG
kern_printf("(MS:FRAME SKIP %d)",p);
#endif
lev->status = FRAME_SKIPPED;
level_table[ lev->scheduling_level ]->
private_extract(lev->scheduling_level, p);
}
}
static void MPEGSTAR_public_activate(LEVEL l, PID p)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
BUDGET_TASK_MODEL b;
budget_task_default_model(b, lev->budget);
#ifdef MPEGSTAR_DEBUG
kern_printf("(MP:Act:%d:%d)",p,lev->budget);
#endif
lev->status = FRAME_DECODING;
level_table[ lev->scheduling_level ]->
private_insert(lev->scheduling_level, p, (TASK_MODEL *)&b);
}
static void MPEGSTAR_public_unblock(LEVEL l, PID p)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
}
static void MPEGSTAR_public_block(LEVEL l, PID p)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
}
static int MPEGSTAR_public_message(LEVEL l, PID p, void *m)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
switch ((long)(m)) {
/* Task EndCycle */
case (long)(NULL):
#ifdef MPEGSTAR_DEBUG
kern_printf("(MS:EndCycle:%d)",p);
#endif
lev->status = FRAME_IDLE;
level_table[ lev->scheduling_level ]->
private_extract(lev->scheduling_level, p);
level_table[ lev->scheduling_level ]->
public_message(lev->scheduling_level, p, NULL);
break;
/* Task Disable */
case (long)(1):
break;
default:
break;
}
return 0;
}
static void MPEGSTAR_public_end(LEVEL l, PID p)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
#ifdef MPEGSTAR_DEBUG
kern_printf("(MS:End:%d)", p);
#endif
lev->current = NIL;
lev->status = FRAME_IDLE;
proc_table[p].status = FREE;
}
/* Registration functions */
/*+ Registration function:
TIME slice the slice for the Round Robin queue +*/
LEVEL MPEGSTAR_register_level(int master)
{
LEVEL l; /* the level that we register */
MPEGSTAR_level_des *lev; /* for readableness only */
l = level_alloc_descriptor(sizeof(MPEGSTAR_level_des));
lev = (MPEGSTAR_level_des *)level_table[l];
lev->l.public_guarantee = NULL;
lev->l.public_create = MPEGSTAR_public_create;
lev->l.public_end = MPEGSTAR_public_end;
lev->l.public_dispatch = MPEGSTAR_public_dispatch;
lev->l.public_epilogue = MPEGSTAR_public_epilogue;
lev->l.public_activate = MPEGSTAR_public_activate;
lev->l.public_unblock = MPEGSTAR_public_unblock;
lev->l.public_block = MPEGSTAR_public_block;
lev->l.public_message = MPEGSTAR_public_message;
lev->l.public_eligible = MPEGSTAR_public_eligible;
lev->budget = NIL;
lev->current = NIL;
lev->status = FRAME_IDLE;
lev->server_Q = 0;
lev->server_T = 0;
lev->scheduling_level = master;
return l;
}
int MPEGSTAR_setbudget(LEVEL l, PID p, int budget)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
lev->budget = budget;
return 0;
}
int MPEGSTAR_getbudget(LEVEL l, PID p)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
return lev->budget;
}
int MPEGSTAR_budget_has_thread(LEVEL l, int budget)
{
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
if (lev->budget == budget) return 1;
return 0;
}
int MPEGSTAR_rescale(int budget, TIME Q, TIME T)
{
LEVEL l = SERVER_get_local_scheduler_level_from_budget(fsf_get_server_level(),budget);
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
SERVER_adjust_budget(lev->scheduling_level,Q,T,T,lev->budget);
lev->server_Q = Q;
lev->server_T = T;
if (lev->current != NIL) {
proc_table[lev->current].avail_time = Q;
proc_table[lev->current].wcet = Q;
}
return 0;
}
int MPEGSTAR_get_remain_capacity(int budget)
{
return SERVER_get_remain_capacity(fsf_get_server_level(),budget);
}
int MPEGSTAR_get_last_reclaiming(int budget)
{
return SERVER_get_last_reclaiming(fsf_get_server_level(),exec_shadow);
}
int MPEGSTAR_is_frame_skipped(int budget)
{
LEVEL l = SERVER_get_local_scheduler_level_from_budget(fsf_get_server_level(),budget);
MPEGSTAR_level_des *lev = (MPEGSTAR_level_des *)(level_table[l]);
if (lev->status == FRAME_SKIPPED)
return 1;
else
return 0;
}