/* task.c. Microkernel task handler for Or1ksim
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/* task.c. Microkernel task handler for Or1ksim
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Copyright (C) 2000 Damjan Lampret
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Copyright (C) 2000 Damjan Lampret
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Copyright (C) 2010 Embecosm Limited
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Copyright (C) 2010 Embecosm Limited
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Contributor Damjan Lampret <lampret@opencores.org>
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Contributor Damjan Lampret <lampret@opencores.org>
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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Contributor Jeremy Bennett <jeremy.bennett@embecosm.com>
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This file is part of OpenRISC 1000 Architectural Simulator.
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This file is part of OpenRISC 1000 Architectural Simulator.
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This program is free software; you can redistribute it and/or modify it
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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under the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your option)
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Software Foundation; either version 3 of the License, or (at your option)
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any later version.
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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more details.
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You should have received a copy of the GNU General Public License along
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You should have received a copy of the GNU General Public License along
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with this program. If not, see <http: www.gnu.org/licenses/>. */
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with this program. If not, see <http: www.gnu.org/licenses/>. */
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/* ----------------------------------------------------------------------------
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/* ----------------------------------------------------------------------------
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This code is commented throughout for use with Doxygen.
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This code is commented throughout for use with Doxygen.
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--------------------------------------------------------------------------*/
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--------------------------------------------------------------------------*/
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/* This file is part of test microkernel for OpenRISC 1000. */
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/* This file is part of test microkernel for OpenRISC 1000. */
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#include "support.h"
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#include "support.h"
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#include "uos.h"
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#include "uos.h"
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#include "ipc.h"
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#include "ipc.h"
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#include "int.h"
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#include "int.h"
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extern struct tcb tasks[MAX_TASKS+1];
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extern struct tcb tasks[MAX_TASKS+1];
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int task(int id)
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int task(int id)
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{
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{
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struct _msg {
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struct _msg {
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char id;
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char id;
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unsigned long count;
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unsigned long count;
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} msg;
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} msg;
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printf("Task %d started\n", id);
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printf("Task %d started\n", id);
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if(id == 1) {
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if(id == 1) {
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msg.id = 1;
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msg.id = 1;
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msg.count = 0;
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msg.count = 0;
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uos_msgsnd(2, (char *)&msg, sizeof(msg));
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uos_msgsnd(2, (char *)&msg, sizeof(msg));
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}
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}
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for(;;) {
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for(;;) {
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uos_msgrcv(0, (char *)&msg, sizeof(msg));
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uos_msgrcv(0, (char *)&msg, sizeof(msg));
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printf("Task %d: Got massage from task %d: 0x%.8x. "
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printf("Task %d: Got massage from task %d: 0x%.8x. "
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"Sending message to task %d: 0x%.8x \n", id, msg.id,
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"Sending message to task %d: 0x%.8x \n", id, msg.id,
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(int)msg.count, (id == 3 ? 1 : (id + 1)),
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(int)msg.count, (id == 3 ? 1 : (id + 1)),
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(int)(msg.count + 1));
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(int)(msg.count + 1));
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msg.id = id;
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msg.id = id;
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if((id == 1) && (msg.count > 15)) {
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if((id == 1) && (msg.count > 15)) {
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report(msg.count + 0xdeadde9c);
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report(msg.count + 0xdeadde9c);
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exit(0);
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exit(0);
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msg.count += 1;
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msg.count += 1;
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uos_msgsnd((id == 3 ? 1 : (id + 1)), (char *)&msg, sizeof(msg));
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uos_msgsnd((id == 3 ? 1 : (id + 1)), (char *)&msg, sizeof(msg));
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}
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}
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}
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}
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}
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}
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/* Called by kernel_init to collect all tasks entries. */
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/* Called by kernel_init to collect all tasks entries. */
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void tasks_entries()
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void tasks_entries()
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{
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{
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tasks[1].regs.pc = (unsigned long)task;
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tasks[1].regs.pc = (unsigned long)task;
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tasks[2].regs.pc = (unsigned long)task;
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tasks[2].regs.pc = (unsigned long)task;
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tasks[3].regs.pc = (unsigned long)task;
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tasks[3].regs.pc = (unsigned long)task;
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}
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}
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