systemserviceslocal.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

/*
 *  systemServicesLocal.h
 *
 *  This file contains the PDU services macros written for AAL2 application
 *  and need to be moved to the system services directory in future.
 */

/*
 *  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 SYSTEM_SERVICES_LOCAL
#define SYSTEM_SERVICES_LOCAL

#define IS_EXTRACT_SPACE_BUSY()        (pduHandle->rxStatus.rxStatus_Flags >= 0)
#define IS_MERGE_SPACE_BUSY()          (pduHandle->txStatus.txStatus_Flags >= 0)

/*********************************************************************
 *  Function      : pduFromDmemToTxSDP 
 *
 *  Description   : This function DMAs
 *                  Length number of bytes starting from the
 *                  byte address as specified in the offset
 *                  parameter and the Line
 *                  Address. The offset need not
 *                  start a non 16 byte
 *                  aligned boundary.
 *
 *  Parameters    : LineAddress  IN Line Address
 *                  offset       IN Byte Address
 *                  Length       IN Length in Bytes 
 *  Returns        : none
 *
 *  Traceability  : TRACEABILITY 
 *
 ********************************************************************/

#define pduFromDmemToTxSDP(pduHandle, LineAddress, Length) \
{ \
   int32u addr = (int32u)LineAddress ;\
\
   /* Wait for the TxCB to be available */ \
    KS_RTWAIT(pduHandle->txCB.txCB_Ctl); \
   /* \
    * Initialize the Btag, PoolId and offset of TxCB \
    * to zeros. \
    pduHandle->txCB.txCB_Btag = 0; \
    pduHandle->txCB.txCB_Pool = 0; \
    */ \
    pduHandle->txCB.txCB_Offset = 0; \
   /* \
    * Initialize the DMA to point to \
    * LineAddress, which is 64 byte aligned. \
    */ \
    pduHandle->txCB.txCB_DMA = BS_ADDR(addr); \
    pduHandle->txCB.txCB_SDP = BS_ADDR(addr); \
   /* \
    * Initialize the TxCB_CTL to clear eop,  \
    * SET own<1> and own<0> and the length field \
    */ \
    pduHandle->txCB.txCB_Ctl = Length | BIT(RxCB_AVAIL) | BIT(TxCB_OWN1) | BIT(TxCB_OWN0);  \
}

/*****************************************************************
 *  Function      : pduFromRxSDPToDmem
 *
 *  Description   : This function is used for copying payload 
 *                  from RxSDP to DMEM.
 *
 *  Parameters    : Pdu Handle,
 *                  DMEM location to write data to.
 *
 *  Returns       : None.
 *
 *  Traceability  : None.
 *
 *****************************************************************/

# define pduFromRxSDPToDmem(pduHandle, dMemAddr) \
{ \
    int32u dmaAddr = (int32u) dMemAddr; \
 \
    /* Confirm that rxCB is available */ \
    KS_RTWAIT(pduHandle->rxCB.rxCB_Ctl.word); \
 \
    /* Set offset to desired offset in MC Buffer \
     * set DMA line address to start of buffer in DMEM \
     */ \
    pduHandle->rxCB.rxCB_Offset = 0; \
    pduHandle->rxCB.rxCB_DMA    = dmaAddr; \
    pduHandle->rxCB.rxCB_SDP    = BS_ADDR(dmaAddr); \
 \
    /* Only set RC related fields, not SDP related fields of rxCB_Ctl \
     * Note that the SDP and DMA addresses need not be reset if the \
     * next frame is to be received aligned - the hardware will automatically \
     * align these two addresses to the 128 byte boundary that they \
     * were initialized to. \
     */ \
    pduHandle->rxCB.rxCB_Ctl.word = BIT(RxCB_AVAIL); \
                                                     /* Length=0 \
                                                      * Avail=1 (No DRAM DMA) \
                                                      * DBE=0 (single buffer) \
                                                      * Own0=0 (SDP owns) \
                                                      */ \
} 

#endif