/*====================================================================
 * os_message.h
 *
 * Copyright 1995, Silicon Graphics, Inc.
 * All Rights Reserved.
 *
 * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics,
 * Inc.; the contents of this file may not be disclosed to third
 * parties, copied or duplicated in any form, in whole or in part,
 * without the prior written permission of Silicon Graphics, Inc.
 *
 * RESTRICTED RIGHTS LEGEND:
 * Use, duplication or disclosure by the Government is subject to
 * restrictions as set forth in subdivision (c)(1)(ii) of the Rights
 * in Technical Data and Computer Software clause at DFARS
 * 252.227-7013, and/or in similar or successor clauses in the FAR,
 * DOD or NASA FAR Supplement. Unpublished - rights reserved under the
 * Copyright Laws of the United States.
 *====================================================================*/

/*---------------------------------------------------------------------*
        Copyright (C) 1998 Nintendo. (Originated by SGI)
        
        $RCSfile: os_message.h,v $
        $Revision: 1.1 $
        $Date: 1998/10/09 08:01:15 $
 *---------------------------------------------------------------------*/

#ifndef _OS_MESSAGE_H_
#define	_OS_MESSAGE_H_

#ifdef _LANGUAGE_C_PLUS_PLUS
extern "C" {
#endif

#include <PR/ultratypes.h>
#include <PR/os_thread.h>

#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)

/**************************************************************************
 *
 * Type definitions
 *
 */

typedef u32 OSEvent;

/*
 * Structure for message
 */
typedef void *	OSMesg;

/*
 * Structure for message queue
 */
typedef struct OSMesgQueue_s {
	OSThread	*mtqueue;	/* Queue to store threads blocked
					   on empty mailboxes (receive) */
	OSThread	*fullqueue;	/* Queue to store threads blocked
					   on full mailboxes (send) */
	s32		validCount;	/* Contains number of valid message */
	s32		first;		/* Points to first valid message */
	s32		msgCount;	/* Contains total # of messages */
	OSMesg		*msg;		/* Points to message buffer array */
} OSMesgQueue;


#endif /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */

/**************************************************************************
 *
 * Global definitions
 *
 */

/* Events */
#ifdef _FINALROM
#define OS_NUM_EVENTS           15
#else
#define OS_NUM_EVENTS           23
#endif

#define OS_EVENT_SW1              0     /* CPU SW1 interrupt */
#define OS_EVENT_SW2              1     /* CPU SW2 interrupt */
#define OS_EVENT_CART             2     /* Cartridge interrupt: used by rmon */
#define OS_EVENT_COUNTER          3     /* Counter int: used by VI/Timer Mgr */
#define OS_EVENT_SP               4     /* SP task done interrupt */
#define OS_EVENT_SI               5     /* SI (controller) interrupt */
#define OS_EVENT_AI               6     /* AI interrupt */
#define OS_EVENT_VI               7     /* VI interrupt: used by VI/Timer Mgr */
#define OS_EVENT_PI               8     /* PI interrupt: used by PI Manager */
#define OS_EVENT_DP               9     /* DP full sync interrupt */
#define OS_EVENT_CPU_BREAK        10    /* CPU breakpoint: used by rmon */
#define OS_EVENT_SP_BREAK         11    /* SP breakpoint:  used by rmon */
#define OS_EVENT_FAULT            12    /* CPU fault event: used by rmon */
#define OS_EVENT_THREADSTATUS     13    /* CPU thread status: used by rmon */
#define OS_EVENT_PRENMI           14    /* Pre NMI interrupt */
#ifndef _FINALROM
#define OS_EVENT_RDB_READ_DONE    15    /* RDB read ok event: used by rmon */
#define OS_EVENT_RDB_LOG_DONE     16    /* read of log data complete */
#define OS_EVENT_RDB_DATA_DONE    17    /* read of hostio data complete */
#define OS_EVENT_RDB_REQ_RAMROM   18    /* host needs ramrom access */
#define OS_EVENT_RDB_FREE_RAMROM  19    /* host is done with ramrom access */
#define OS_EVENT_RDB_DBG_DONE     20
#define OS_EVENT_RDB_FLUSH_PROF   21
#define OS_EVENT_RDB_ACK_PROF     22
#endif

/* Flags to turn blocking on/off when sending/receiving message */

#define	OS_MESG_NOBLOCK		0
#define	OS_MESG_BLOCK		1


#if defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS)

/**************************************************************************
 *
 * Macro definitions
 *
 */

/* Get count of valid messages in queue */
#define MQ_GET_COUNT(mq)        ((mq)->validCount)

/* Figure out if message queue is empty or full */
#define MQ_IS_EMPTY(mq)		(MQ_GET_COUNT(mq) == 0)
#define MQ_IS_FULL(mq)		(MQ_GET_COUNT(mq) >= (mq)->msgCount)


/**************************************************************************
 *
 * Extern variables
 *
 */


/**************************************************************************
 *
 * Function prototypes
 *
 */

/* Message operations */

extern void		osCreateMesgQueue(OSMesgQueue *, OSMesg *, s32);
extern s32		osSendMesg(OSMesgQueue *, OSMesg, s32);
extern s32		osJamMesg(OSMesgQueue *, OSMesg, s32);
extern s32		osRecvMesg(OSMesgQueue *, OSMesg *, s32);

/* Event operations */

extern void		osSetEventMesg(OSEvent, OSMesgQueue *, OSMesg);


#endif  /* defined(_LANGUAGE_C) || defined(_LANGUAGE_C_PLUS_PLUS) */

#ifdef _LANGUAGE_C_PLUS_PLUS
}
#endif

#endif /* !_OS_MESSAGE_H_ */