Subversion Repositories ht_tunnel

//RequestPacket.cpp

/* ***** BEGIN LICENSE BLOCK *****

 * Version: MPL 1.1

 *

 * The contents of this file are subject to the Mozilla Public License Version

 * 1.1 (the "License"); you may not use this file except in compliance with

 * the License. You may obtain a copy of the License at

 * http://www.mozilla.org/MPL/

 *

 * Software distributed under the License is distributed on an "AS IS" basis,

 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License

 * for the specific language governing rights and limitations under the

 * License.

 *

 * The Original Code is HyperTransport Tunnel IP Core.

 *

 * The Initial Developer of the Original Code is

 * Ecole Polytechnique de Montreal.

 * Portions created by the Initial Developer are Copyright (C) 2005

 * the Initial Developer. All Rights Reserved.

 *

 * Contributor(s):

 *   Ami Castonguay <acastong@grm.polymtl.ca>

 *

 * Alternatively, the contents of this file may be used under the terms

 * of the Polytechnique HyperTransport Tunnel IP Core Source Code License

 * (the  "PHTICSCL License", see the file PHTICSCL.txt), in which case the

 * provisions of PHTICSCL License are applicable instead of those

 * above. If you wish to allow use of your version of this file only

 * under the terms of the PHTICSCL License and not to allow others to use

 * your version of this file under the MPL, indicate your decision by

 * deleting the provisions above and replace them with the notice and

 * other provisions required by the PHTICSCL License. If you do not delete

 * the provisions above, a recipient may use your version of this file

 * under either the MPL or the PHTICSCL License."

 *

 * ***** END LICENSE BLOCK ***** */

#include "RequestPacket.h"

RequestPacket:: RequestPacket(const sc_bv<6> &command,

                              const sc_bv<4> &seqID,

                                          const sc_bv<5> &unitID,

                                          const bool passPW,

                                          const bool isocOrCompat,

                                          const sc_bv<5> srcTag,

                                          const sc_bv<4> count,

                                          const sc_bv<38> address)

{

        bv.range(5,0) = command;

        bv.range(7,6) = seqID.range(3,2);

        bv.range(14,13) = seqID.range(1,0);

        bv.range(12,8) = unitID;

        bv[15] = passPW;

        bv[21] = isocOrCompat;

        bv.range(20,16) = srcTag;

        bv.range(25,22) = count;

        bv.range(63,26) = address;

}

//If the packet is a packet that only contains 32 bits

bool RequestPacket::isDwordPacket() const{

        sc_bv<6> cmd = bv(5 , 0);

        if(cmd == "111100" || cmd == "111111" || cmd == "000010"){

                return true;

        }

        return false;

}

//If the packet has a data packet associated to it

bool RequestPacket::hasDataAssociated() const{

        if(bv(5 , 0) == "111101" ||

                bv(5 , 3) == "101" || bv(5 , 3) == "001")

        {

                return true;

        }

        return false;

}

//To get the virtual channel of the packet

VirtualChannel RequestPacket::getVirtualChannel() const{

        if(bv[5] == '1' && bv.range(4,0) != "11101") return VC_POSTED;

        return VC_NON_POSTED;

}

bool RequestPacket::isInAddressRange(const char * low, const char * high) const{

        //Start by converting the strings to uint

        sc_uint<40> low_uint(low);

        sc_uint<40> high_uint(high);

        //Call the function taking uints

        return isInAddressRange(low_uint,high_uint);

}

bool RequestPacket::isInAddressRange(const sc_bv<40> &low, const sc_bv<40> &high) const{

        //Start by converting the strings to uint

        sc_uint<40> low_uint(low);

        sc_uint<40> high_uint(high);

        //Call the function taking uints

        return isInAddressRange(low_uint,high_uint);

}

bool RequestPacket::isInAddressRange(const sc_uint<40> &low,

                                                                                 const sc_uint<40> &high) const{

        if(isDwordPacket()) return false;

        sc_uint<40> addr = getRequestAddr();

        return (addr >= low && addr < high);

}

sc_uint<40> RequestPacket::getRequestAddr() const{

        sc_uint<40> addr;

        //If the packet only has 32 bits, return an address

        //of only zeros since it does not have any address

        if(isDwordPacket())

                return addr;

        //Copy the standard range of addresses

        sc_bv<37> temp(bv.range(63,27));

        addr.range(39,3) = temp;

        //Copy the last bit of the address.  An exception is made for

        //the ATOMIC packet, that has this bit always at 0

        sc_bit temp2(bv[26]);

        if(bv(5 , 0) != "111101") addr.bit(2) = temp2;

        //Return the address

        return addr;

}

sc_uint<4> RequestPacket::getDataLengthm1() const {

        //If a byte read (cmd starts by 01 for read, and pkt[2] for byte

        if(bv[5] == false && bv[4] == true && bv[2] == true){

                return 0;

        }

        else{

                //DataLength is Doubleword

                return (sc_bv<4>)bv.range(25,22);;

        }

}

sc_bv<4> RequestPacket::getSeqID() const{

        sc_bv<4> temp;

        temp.range(3,2) = bv(7,6);

        temp.range(1,0) = bv(14,13);

        return temp;

}

bool RequestPacket::getPassPW() const{

        return (sc_bit)bv[15];

}

sc_bv<5> RequestPacket::getUnitID() const{

        return bv.range(12,8);

}

sc_bv<5> RequestPacket::getSrcTag() const{

        return bv.range(20,16);

}

bool RequestPacket::getCompatOrIsoc() const{

        return (sc_bit)bv[21];

}

bool RequestPacket::isChain() const{

        //if(posted && write && bit chain)

        if(bv.range(5 , 3) == "101" &&

           bv[19] == true) return true;

        return false;

}