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/* ipc.h.  Microkernel IPC header 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. */

/* Operation completed sucessfully. */

#define IPC_NOERR 0

/* Can't send any messages due to lack of free MCBs. */

#define IPC_EOUTOFMCBS 1

/* Sending message: No such destination task.

   Receiving message: No such origin task. */

#define IPC_ENOTASK 2

/* Message to big to be sent or receive buffer is to small for

   receiving message. If receiving then try again with bigger buffer. */

#define IPC_ETOOBIG 3

/* No messages waiting to be received. */

#define IPC_ENOMSGS 4

/* Send message in buffer buf of size len to task desttask. */

void uos_msgsnd(tid_t desttask, char *buf, int len);

/* Receive message of max size len from task origintask and put it

   into buffer buf. If origintask is zero then get the first message

   from the message queue. */

void uos_msgrcv(tid_t origintask, char *buf, int len);