aal2switchtablesxp.c

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

/*
 *  aal2SwitchTables.c
 *
 *  AAL2 Switch tables building
 */

/*
 *  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.
 */

#include <dcpTypes.h>
#include <dcpTableSvcs.h>

#include <atm.h>
#include <atmVcTable.h>
#include <aal2TableDefs.h>
#include <aal2XpIf.h>
/* #define RX_MISC_1_2 */

extern  VcUnicastIngressInit atmSwitchUnicastTables1[];
/*
 *  Function:           aal2CidTableSetup
 *
 *  Description:        Create the table to be by used AAL2 RX CPs for 
 *                      switching the cells to the AAL2 TX CP. Egress VcIndex,
 *                      CID and queue ids are obtained from the lookup.
 *                      
 *                      Modifications had been done to include the changes 
 *                      due to ATM table enhancements which uses HTK table. 
 *                      Now all the AAL2 CPs do a lookup on the same table.
 * 
 *  Arguments:          TsTableId
 *
 *  Returns:            none
 */

#define MAX_AAL2_VC_INDEX 25
void aal2CidTableSetup(TsTableId tableId)
{
    int16u vcIndex;
    int16u  ocid;
    int16u  ecid;

    CidTabEntry     etabEntry;
    CidTabEntry     otabEntry;
    CidTabEntryData *edata = &(etabEntry.data);
    CidTabEntryData *odata = &(otabEntry.data);

    for (vcIndex = 1; vcIndex < MAX_AAL2_VC_INDEX; vcIndex++)
    {
        for (ecid = 1; ecid <= 7; ecid++)
        {
            edata->queueId = XP_RES_CID_QUEUE;
            etabEntry.index                    = composeCidIndex (vcIndex,ecid);
            edata->vcIndex                     = vcIndex;
            edata->cid                         = ecid;
            edata->atmEgressKey                = 
                atmSwitchUnicastTables1[edata->vcIndex - 1].ingressData.atmEgressKey;
            aal2CidTableWrite(&etabEntry, tableId);
        }
        for (ecid = 8, ocid = 9; ecid < 249; ecid+= 48, ocid += 48)
        {
            if (vcIndex <= 4)
            {
                edata->queueId = AAL2_TX5_BASE_QUEUE;
                odata->queueId = AAL2_TX5_BASE_QUEUE;
            }
            else if (vcIndex <= 8)
            {
                edata->queueId = AAL2_TX4_BASE_QUEUE;
                odata->queueId = AAL2_TX4_BASE_QUEUE;
            }
            else if (vcIndex <= 12)
            {
                edata->queueId = AAL2_TX6_BASE_QUEUE;
                odata->queueId = AAL2_TX6_BASE_QUEUE;
            }
            else if (vcIndex <= 16)
            {
                edata->queueId = AAL2_TX2_BASE_QUEUE;
                odata->queueId = AAL2_TX2_BASE_QUEUE;
            }
            else if (vcIndex <= 20)
            {
                edata->queueId = AAL2_TX1_BASE_QUEUE;
                odata->queueId = AAL2_TX1_BASE_QUEUE;
            }
            else if (vcIndex <= 24)
            {
                edata->queueId = AAL2_TX3_BASE_QUEUE;
                odata->queueId = AAL2_TX3_BASE_QUEUE;
            }
	    /* Write the even CID data first */
            edata->vcIndex = MAX_AAL2_VC_INDEX - vcIndex;
            etabEntry.index = composeCidIndex (vcIndex,ecid);
            edata->cid     = 256 - ecid;
            edata->atmEgressKey = 
                atmSwitchUnicastTables1[edata->vcIndex - 1].ingressData.atmEgressKey;
            aal2CidTableWrite(&etabEntry, tableId);
            
	    /* Write the odd CID data next */
            odata->vcIndex = MAX_AAL2_VC_INDEX - vcIndex;
            otabEntry.index = composeCidIndex (vcIndex,ocid);
            odata->cid     = 258 - ocid;
            odata->atmEgressKey = 
                atmSwitchUnicastTables1[odata->vcIndex - 1].ingressData.atmEgressKey;
            aal2CidTableWrite(&otabEntry, tableId);
        }
    }
}