atminit.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

/*
 *  atmInit.c
 *
 *  Initialization of the ATM cell switch
 */

/*
 *  Copyright (c) 1998,1999,2000,2001,2002 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 <dcpBufferSvcs.h>
#include <dcpTableSvcs.h>
#include <dcpPduSvcs.h>

#include "rcSdpAtmApiIf.h"
#include "atmStatus.h"
#include "atmPrivate.h"

/*
 *  atmInitialize() - public function that initializes atmCellSwitch application.
 */

void
atmInitialize(void)
{
    /* Initialize receive and transmit side threads */

    int32u scope;

    for (scope = 0; scope < MAX_SCOPES; scope++) {
        BsBufHandle bufHandle;
        MergeSpc*   mergeSpc;
        PduHandle   pduHandle = pduHandleForScopeNumber(scope);

        /*
         *  Prime each payload receive data scope with a buffer handle.
         *  This is necessary because the receive algorithm is optimized
         *  with the assumption that there is always a buffer handle
         *  in the receive data scope ready to capture incoming payload.
         */
        while (bsError(bufHandle = bsBufferAllocate(poolId)));
        pduRxBufHandleSet(pduHandle, bufHandle);
        pduRxPayloadSet(pduHandle, 0);
        pduRxFree(pduHandle);

        /*
         *  Prime each payload transmit data scope with a buffer handle.
         *  This is necessary because the transmit algorithm is optimized
         *  with the assumption that there is always a buffer handle
         *  in the transmit data scope that must be freed.
         */
        while (bsError(bufHandle = bsBufferAllocate(poolId)));
        pduTxBufHandleSet(pduHandle, bufHandle);
        mergeSpc = (MergeSpc*)pduTxHeaderGet(pduHandle);
        mergeSpc->atmMergeSpc.payloadLength = -48;
    }
}