aal2rx.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

/*
 *  aal2Rx.h
 *
 *  This file contains the data structure definition which are
 *  specific only to the AAL2 Rx CPRC. These definitions will be
 *  used by Initialization, Handler and forwarder.
 */

/*
 *  Copyright (c) 2000, 2001, 2002 C-Port Corporation, a Motorola Company 
 *  All Rights Reserved
 *
 *  The information contained in this file is C-Port Corporation 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 or Motorola Incorporated is strictly prohibited.
 */

#ifndef AAL2RX_H
#define AAL2RX_H

#define STF_SIZE                             1
#define CPS_PDU_SIZE                        48
#define CPS_PDU_PAYLOAD_SIZE                47
#define CPS_PCK_HDR_SIZE                     3
#define AAL2_RX_HDLR_THREAD_STACK_SIZE     512
#define AAL2_RX_FWDR_THREAD_STACK_SIZE     512
#define NUM_CPS_DESCRIPTORS                  4
#define NUM_TLU_REQ_SLOTS                    4
#define AAL2_RX_VC_TABLE_SIZE              512
#define NOT_ALLOCATED               0xFFFFFFFF
#define NUM_VCCBS                            2

/* Virtual Circuit Context Block - definitions */
typedef enum _vccbLock{
    NO_LOCK,
    LOCKED
} VCCB_LOCK;

typedef struct _vccb {
    int8u       *partialPayload; /* Storage for partial payload */
    int8u       *cellPayload;    /* Storage for Cell payload */
    int16u      ingressVcIndex;  /* Ingress VC index */
    VCCB_LOCK   lockFlag;        /* Flag for locking VCCB */
} VCCB;

/****************************************************
       Definitions for AAL2 Rx VC index table
****************************************************/

typedef struct _aal2RxVcTable {
    BsBufHandle   bufHandlePtr;  /* SDRAM Buffer handle */
    int8u         offset;        /* No. of bytes in SDRAM buffer */
    int8u         cid;           /* Channel ID  */
    int16u        li       : 6;  /* Length Indicator */
    int16u        uui      : 5;  /* User-to-User Indication */
    //int16u        pad      : 2;  /* Padding bits */
    int16u        sn       : 1;  /* Next expected sequence no. */
    int16u        hdrLen   : 2;  /* No. of header bits */
} AAL2RxVcTable;

/*****************************************************
 * Definition of AAL2 Rx CONTEXT. 
 * This structure will contain all the global variables 
 * required for functioning of AAL2 Rx module.
 ******************************************************
 */
typedef struct {
    QsMessage        cpsDescriptor[NUM_CPS_DESCRIPTORS];  /* Queue descriptors for CPS packets */
    AAL2RxVcTable    aal2RxVcTable[AAL2_RX_VC_TABLE_SIZE]; /*AAL2 Rx VC index table */
    int32u           aal2ConnectionId;                    /* AAL2 Rx TLU lookup index */ 
    TsTableId        tableId;                             /* AAL2 Rx CP Table Id */
    TsEntry          entry[NUM_TLU_REQ_SLOTS];            /* Table entry response structure */
    TsKey            key;                                 /* Table data retrieving */
    VCCB             vccb[NUM_VCCBS];                     /* AAL2 VC connection Block */
    Aal2CpsDesc      *cpsDescArray[NUM_CPS_DESCRIPTORS];  /* Pointers to CPS packet queue descriptors */
} AAL2_RX_CONTEXT;

/*****************************************************
    Macros for getting and setting bit fields in AAL2 Rx VC index table
*****************************************************/

/* Get the buffer offset from the AAL2 Rx VC index table entry */
#define AAL2_RX_GetBufOffset(dtEntry) (((AAL2RxVcTable *)dtEntry)->offset)

/* Get the expected SN from the AAL2 Rx VC index table entry */
#define AAL2_RX_getSeqNo(dtEntry) (((AAL2RxVcTable *)dtEntry)->sn)

/* Get the UUI from the AAL2 Rx VC index table entry */
#define AAL2_RX_getUUI(dtEntry) (((AAL2RxVcTable *)dtEntry)->uui)

/* Get the buffer offset from the AAL2 Rx VC index table entry */
#define AAL2_RX_getLI(dtEntry)  (((AAL2RxVcTable *)dtEntry)->li)

/* Set the Buffer offset bit in the AAL2 Rx VC index table entry */
#define AAL2_RX_setBufOffset(dtEntry, newval) (((AAL2RxVcTable *)dtEntry)->offset = newval)

/* Set the Sequence number bit in the AAL2 Rx VC index table entry */
#define AAL2_RX_setSeqNo(dtEntry, curSeqNo) (((AAL2RxVcTable *)dtEntry)->sn = (curSeqNo ^ 1))

/* Set the value of UUI in the AAL2 Rx VC index table */
#define AAL2_RX_setUUI(dtEntry, newval) (((AAL2RxVcTable *)dtEntry)->Uui = newval)

/* The value of LI in the AAL2 Rx VC index table entry */
#define AAL2_RX_setLI(dtEntry, newval) (((AAL2RxVcTable *)dtEntry)->li = newval)

#define composeAal2ConnectionId(vcIndex, cid) (((vcIndex) << 8) | (cid))

#endif /* AAL2RX_H */