aal2tx.h

摩托罗拉Motolola公司网络处理器C3的示范代码.实现了ATM的AAL2层交换功能.想了解网络处理器的可以

/*
 *  Copyright (c) 2001, 2002 C-Port Corporation
 *  All Rights Reserved
 *
 *  The information contained in this file is confidential and proprietary.
 *  Any reproduction, use or disclosure, in whole or in part, of this
 *  program, including any attempt to obtain a human-readable version of this
 *  program, without the express, prior written consent of C-Port
 *  Corporation is strictly prohibited.
 */
/*---------------------------------------------------------------------------*/
#ifndef _AAL2TX_H_
#define _AAL2TX_H_
/*---------------------------------------------------------------------------*/
#include <dcpKernelSvcs.h>
#include <dcpBufferSvcs.h>
#include <dcpPduSvcs.h>
#include <dcpTableSvcs.h>
#include <dcpQueueSvcs.h>
/*---------------------------------------------------------------------------*/
#define AAL2_TX_HDLR_STACK_SIZE		256
#define AAL2_TX_FWDR_STACK_SIZE		256
#define MAX_DMEM_TABLE_SIZE			512
#define MAX_CPS_CONTROL_BLOCKS		MAX_SCOPES
#define DMEM_TABLE_INDEX_MASK		0x01FF
#define ATM_SDU_SIZE				48
#define CPS_PH_SIZE					3
#define STF_SIZE					1
#define MAX_CPS_PL_IN_ATM_CELL		(ATM_SDU_SIZE - CPS_PH_SIZE - STF_SIZE)
#define NOT_ALLOCATED				0xFFFFFFFF
#define EQ							==
#define NE							!=
#define AND							&&
#define OR							||
#define LT							<
#define GT							>
#define LE							<=
#define GE							>=

#ifdef AAL2_TX_DEBUG 
	#define Aal2TxDebugValPrint(s, i) ksPrintf(s "0x%x", i)
	#define Aal2TxDebugStrPrint(s)	  ksPrintf(s)
#else
	#define Aal2TxDebugValPrint(s, i) 
	#define Aal2TxDebugStrPrint(s) 
#endif
/*---------------------------------------------------------------------------*/
/* DMEM Table, present size 8 bytes */
typedef struct
{
	/* 4 Byte buffer handle */
	BsBufHandle	AtmSduBufHandle;	
	int32u		atmEgressKey;    /* ATM egress VPI, VCI and port # */

	/* 1 Bit  : STF Seq Number,
	 * 6 Bits : Bytes packed in the ATM SDU.
	 * Can accommodate one more 1 bit variable.
	 */
	int8u		StfSequenceNumber	: 1;
	int8u       AtmSduBytesCount	: 6;

	/* 2 Bits: Timer_CU Seq Num (0-3), 
	 * 1 Bit : CU_Timer Started Flag,
	 * 1 Bit : CU_Timer Expired Flag
	 * If more fields required in this structure of size <= 4 bits
	 * then pack in this field.
	 */
	int8u		CuTimerSeqNum		: 2;
	int8u		CuTimerStarted		: 1;
	int8u		CuTimerExpired		: 1;

} Aal2TxDmemTable;


/* CPS Control Block */
typedef struct
{
	/* 16 bits VC Index */
	int16u		VcIndex;
	
	/* Fwder processing done over this control block flag */
	int8u		FwderProcDone;

	/* Count of ATM SDUs, formed with a CPS packet */
	int8u		CountAtmSdu;

} CpsControlBlock;


/* Global structure to keep global variables of AAL2 Tx module. This structure will 
 * be kept in a common memory, where AAL2 Rx module can also keep its global variables.
 * That arrangement will be done defining a union of two.
 */
typedef struct 
{
	QsMessage			CpsDescMsg;
	QsMessage			XpInQueueDescMsg;
	QsMessage			TimeoutDescriptorMsg;

	Aal2TxDmemTable		Aal2TxDmemTable[MAX_DMEM_TABLE_SIZE];
	CpsControlBlock		CpsControlBlocks[MAX_CPS_CONTROL_BLOCKS];

	QsQueueId			CellDescQId;
	QsQueueId			Aal2TxCuTimerEventQ;
	
} AAL2_TX_CONTEXT;
/*---------------------------------------------------------------------------*/
#endif