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/*

 * Project: HARTIK (HA-rd R-eal TI-me K-ernel)

 *

 * Coordinators: Giorgio Buttazzo <giorgio@sssup.it>

 *               Gerardo Lamastra <gerardo@sssup.it>

 *

 * Authors     : Paolo Gai <pj@hartik.sssup.it>

 * (see authors.txt for full list of hartik's authors)

 *

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

 *

 * http://www.sssup.it

 * http://retis.sssup.it

 * http://hartik.sssup.it

 */

/**

 ------------

 CVS :        $Id: const.h,v 1.4 2004-01-28 11:54:36 giacomo Exp $

 File:        $File$

 Revision:    $Revision: 1.4 $

 Last update: $Date: 2004-01-28 11:54:36 $

 ------------

 System constants:

   - Customizable constants

   - Non-Customizable constants

 IMPORTANT!!!

 This file is used also at assembly level,to have unique

 defintion and avoid mess!

**/

/*

 * 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 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

 *

 */

#ifndef __KERNEL_CONST_H__

#define __KERNEL_CONST_H__

#include <ll/i386/tss-ctx.h>

/* -------------------------------------------------------------------- */

/* These constant can be freely changed to customize the kernel         */

/* -------------------------------------------------------------------- */

/* Tasks, functions, interrupts, exceptions */

#define MAX_PROC          TSSMax-1      /*+ Maximum number of tasks

                                            Change the value in

                                            ll/i386/tss-ctx.h!!!

                                            -1 because there is the

                                            global context!!!            +*/

#define MAX_RUNLEVEL_FUNC 40            /*+ Runlevel functions +*/

#define STACK_SIZE      4096U           /*+ Stack size in bytes          +*/

#define JET_TABLE_DIM     20U           /*+ Max n. of Jet entries        +*/

#define MAX_CANCPOINTS    20U           /*+ maximum number of cancellation

                                            points (look at kill.c) +*/

#define MAX_SIGINTPOINTS  20U           /*+ maximum number of signal

                                            interruptable points         +*/

/* Levels and modules */

#define MAX_SCHED_LEVEL   30U           /*+ Max Schedule levels          +*/

#define MAX_RES_LEVEL     8U            /*+ Max Resource levels          +*/

#define MAX_LEVELNAME     20U           /*+ Level Name Max Lenght        +*/

#define MAX_MODULENAME    20U           /*+ Resource Module Name Max L.  +*/

#define MAX_TASKNAME      20U           /*+ Task Name Max Length         +*/

/* Resource and communication */

#define MAX_CPRINT_BUF 512U           /*+ Length of cprintf() buffer   +*/

/* -------------------------------------------------------------------- */

/* End of user customazable constants                                   */

/* -------------------------------------------------------------------- */

/*+ this is the bandwidth used in the on-line guarantee algorithm

    the value means x/MAX_BANDWIDTH free bandwidth... +*/

#define MAX_BANDWIDTH MAX_DWORD

/*+ STATUS attributes are divided in 2 sets:

    - kernel status set (FREE, EXE, SLEEP, IDLE)

    - scheduling modules status set (the remainings status! READY...)

      the values are in the range [MODULE_STATUS_BASE, APER_STATUS_BASE-1]

    - aperiodic servers status set

      the minimum value is APER_STATUS_BASE

      The statuses must be separated because an aperiodic server may,

      for example put an event that checks a task state;

+*/

#define FREE            0

#define EXE             1

#define SLEEP           2

#define WAIT_JOIN       3

#define WAIT_COND       4

#define WAIT_SIG        5

#define WAIT_SEM        6

#define WAIT_NANOSLEEP  7

#define WAIT_SIGSUSPEND 8

#define WAIT_MQSEND     9

#define WAIT_MQRECEIVE 10

/*+ base status for scheduling levels +*/

#define MODULE_STATUS_BASE  128

/*+ base status for aperiodic servers +*/

#define APER_STATUS_BASE   1024

/*+ base status for libraries +*/

#define LIB_STATUS_BASE    2048

/*+ return value for killed tasks; it is equal to PTHREAD_CANCELED!!! +*/

#define TASK_CANCELED  (void *)1

/*+ Set the cancellation state of the task +*/

#define TASK_CANCEL_ENABLE  KILL_ENABLED

#define TASK_CANCEL_DISABLE 0

/*+ Set the cancellation type of the task +*/

#define TASK_CANCEL_DEFERRED     KILL_DEFERRED

#define TASK_CANCEL_ASYNCHRONOUS 0

/* C stuff */

#ifndef NIL

#define NIL     -1                      /*+ integer unvalid value   +*/

#endif

/*+ Blocking attribute for semaphore, port & keyboard operations +*/

#define BLOCK           1

#define NON_BLOCK       0

#define DEFAULT (DWORD)-1

/*+ sys_atrunlevel status bit values: used to signal that the function

    has to be called +*/

#define RUNLEVEL_STARTUP     0 /*+ startup in real mode                  +*/

#define RUNLEVEL_INIT        1 /*+ init time                             +*/

#define RUNLEVEL_RUNNING     2 /*+ system is running!!!                  +*/

#define RUNLEVEL_SHUTDOWN    3 /*+ shutting down the system              +*/

#define RUNLEVEL_BEFORE_EXIT 4 /*+ before the kernel has been terminated +*/

#define RUNLEVEL_AFTER_EXIT  5 /*+ after the kernel has been terminated  +*/

#define RUNLEVEL_MASK        0x7 /*+ a mask used into kernel/init.c      +*/

#define NO_AT_ABORT          8 /*+ only when sys_end is called           +*/

#endif /* __CONST_H__ */