Subversion Repositories openrisc_me

/* task.c.  Microkernel task handler for Or1ksim

   Copyright (C) 2000 Damjan Lampret

   Copyright (C) 2010 Embecosm Limited

   Contributor Damjan Lampret <lampret@opencores.org>

   Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>

   This file is part of OpenRISC 1000 Architectural Simulator.

   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 3 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, see <http:  www.gnu.org/licenses/>.  */

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

   This code is commented throughout for use with Doxygen.

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

/* This file is part of test microkernel for OpenRISC 1000. */

#include "support.h"

#include "uos.h"

#include "ipc.h"

#include "int.h"

extern struct tcb tasks[MAX_TASKS+1];

int task(int id)

{

        struct _msg {

                char            id;

                unsigned long   count;

        } msg;

        printf("Task %d started\n", id);

        if(id == 1) {

                msg.id = 1;

                msg.count = 0;

                uos_msgsnd(2, (char *)&msg, sizeof(msg));

        }

        for(;;) {

                uos_msgrcv(0, (char *)&msg, sizeof(msg));

                printf("Task %d: Got massage from task %d: 0x%.8x. "

                       "Sending message to task %d: 0x%.8x \n", id, msg.id,

                       (int)msg.count, (id == 3 ? 1 : (id + 1)),

                       (int)(msg.count  + 1));

                msg.id = id;

                if((id == 1) && (msg.count > 15)) {

                  report(msg.count + 0xdeadde9c);

                  exit(0);

                        msg.count += 1;

                        uos_msgsnd((id == 3 ? 1 : (id + 1)), (char *)&msg, sizeof(msg));

                }

        }

}

/* Called by kernel_init to collect all tasks entries. */

void tasks_entries()

{

        tasks[1].regs.pc = (unsigned long)task;

        tasks[2].regs.pc = (unsigned long)task;

        tasks[3].regs.pc = (unsigned long)task;

}