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//ResponsePacket.h

/* ***** 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 ***** */

#ifndef ResponsePacket_H

#define ResponsePacket_H

#ifndef SC_USER_DEFINED_MAX_NUMBER_OF_PROCESSES

#define SC_USER_DEFINED_MAX_NUMBER_OF_PROCESSES

#define SC_VC6_MAX_NUMBER_OF_PROCESSES 20

#endif

#include <systemc.h>

#include "ControlPacket.h"

///Response packets

/**

        A packet of type response is issued to respond to a request packet

*/

class ResponsePacket: public ControlPacket{

public:

        ///Constructor with a 32 bit vector

        /**

                @param dWord The least significant 32 bits that represents packet

        */

        ResponsePacket(const sc_bv<32> &dWord) : ControlPacket(dWord){}

        ///Constructor with a 64 bit vector

        /**

                @param qWord The 64 bits that represents packet

        */

        ResponsePacket(const sc_bv<64> &qWord) : ControlPacket(qWord){}

        ///Constructor with specific parameters for responses

        /**

                This allows to construct a packet with parameters that are generic

                to all response packets

                @param command  The command of the packet, defines the exact type of the

                                                packet.

                @param unitID   unitID of the device that sent the response

                @param srcTag   srcTag allows to track non-posted packets.  When a non-posted packet

                                                is sent with a srcTag, another non-posted packet with that same

                                                srcTag cannot be sent before a response is received for the original

                                                request.  This is the srcTag of the request paquet that this

                                                response packet is responding to

                @param rqUID    When bridge == 0, this is the last two bits of the unitID of the device

                                                that sent the request this response is responding to

                @param bridge   If this packet comes from the host or a bridge

                @param error    Error returned in the packet

                @param passPW   If this packet can pass posted writes (increased priority)

                @param isoc             This bit either represents if the packet travels in isoc channels

                                                (increased priority)

        */

        ResponsePacket(const sc_bv<6> &command,

                                           const sc_bv<5> &unitID,

                                           const sc_bv<5> &srcTag,

                                           const sc_bv<2> &rqUID,

                                           bool bridge,

                                           ResponseError error = RE_NORMAL,

                                           bool passPW = 0,

                                           bool isoc = 0);

        ///If the packet type is 32 bits

        /**

                All response packets are 32 bits

                @return true

        */

        virtual bool isDwordPacket() const {return true;}

        /**

                @return unitID of the device that sent the response

        */

        sc_bv<5> getUnitID() const;

        virtual bool hasDataAssociated() const;

        ///If packet part of chain

        /**

                @return false

        */

        virtual bool isChain() const {return false;}

        ///Get the SrcTag of the response

        /**

                @return SrcTag of the response

        */

        virtual sc_uint<5> getSrcTag() const {return (sc_bv<5>)bv.range(20,16);}

        ///Get the <code>VirtualChannel</code> of the packet

        /**

                To get the virtual channel of this packet

                Packet can travel in different channels depending on their function

                and of their attributes.  Responses always travel in the Response

                virtual channel

                @return The VirtualChannel VC_RESPONSE

        */

        virtual VirtualChannel getVirtualChannel() const {return VC_RESPONSE;}

        ///Get the type of this packet

        /**

                @return The RESPONSE PacketType

        */

        virtual PacketType getPacketType() const {return RESPONSE;}

        virtual PacketCommand getPacketCommand() const = 0;

        virtual sc_uint<4> getDataLengthm1() const;

        virtual ControlPacket* getCopy() const = 0;

        virtual bool getPassPW() const;

        /**

                @return The error contained in the packet

        */

        ResponseError getResponseError() const;

};

///ReadResponse response packet 

/**

        The ReadResponsePacket is sent in response to a read request.

*/

class ReadResponsePacket: public ResponsePacket{

public:

        ///Constructor with a 32 bit vector

        /**

                @param dWord The least significant 32 bits that represents packet

        */

        ReadResponsePacket(const sc_bv<32> &dWord) : ResponsePacket(dWord){}

        ///Constructor with a 64 bit vector

        /**

                @param qWord The 64 bits that represents packet

        */

        ReadResponsePacket(const sc_bv<64> &qWord) : ResponsePacket(qWord){}

        ///Constructor with specific parameters for responses

        /**

                This allows to construct a packet with parameters that are generic

                to all response packets

                @param unitID   unitID of the device that sent the response

                @param srcTag   srcTag allows to track non-posted packets.  When a non-posted packet

                                                is sent with a srcTag, another non-posted packet with that same

                                                srcTag cannot be sent before a response is received for the original

                                                request.  This is the srcTag of the request paquet that this

                                                response packet is responding to

                @param rqUID    When bridge == 0, this is the last two bits of the unitID of the device

                                                that sent the request this response is responding to

                @param count    The count of dwords being sent in the data packet associated to this

                                                ReadResponsePacket

                @param bridge   If this packet comes from the host or a bridge

                @param error    Error returned in the packet

                @param passPW   If this packet can pass posted writes (increased priority)

                @param isoc             This bit either represents if the packet travels in isoc channels

                                                (increased priority)

        */

        ReadResponsePacket(const sc_bv<5> &unitID,

                                                 const sc_bv<5> &srcTag,

                                                 const sc_bv<2> &rqUID,

                                                 const sc_bv<4> &count,

                                                 bool bridge,

                                                 ResponseError error = RE_NORMAL,

                                                 bool passPW = 0,

                                                 bool isoc = 0) :

                ResponsePacket(sc_bv<6>("110000"),

                                                  unitID,

                                                  srcTag,

                                                  rqUID,

                                                  bridge,

                                                  error,

                                                  passPW,

                                                  isoc)

        {

                bv.range(25,22) = count;

        }

        ///To get the command of the packet

        /**

                @return RD_RESPONSE

        */

        virtual PacketCommand getPacketCommand() const{return RD_RESPONSE;}

        ControlPacket* getCopy() const{

                return new ReadResponsePacket(bv);

        }

};

///TargetDone response packet 

/**

        TargetDonePacket is sent to say that something has been completed.

        For example it can be a non-posted write or a flush request.

*/

class TargetDonePacket: public ResponsePacket{

public:

        ///Constructor with a 32 bit vector

        /**

                @param dWord The least significant 32 bits that represents packet

        */

        TargetDonePacket(const sc_bv<32> &dWord) : ResponsePacket(dWord){}

        ///Constructor with a 64 bit vector

        /**

                @param qWord The 64 bits that represents packet

        */

        TargetDonePacket(const sc_bv<64> &qWord) : ResponsePacket(qWord){}

        ///Constructor with specific parameters for responses

        /**

                This allows to construct a packet with parameters that are generic

                to all response packets

                @param unitID   unitID of the device that sent the response

                @param srcTag   srcTag allows to track non-posted packets.  When a non-posted packet

                                                is sent with a srcTag, another non-posted packet with that same

                                                srcTag cannot be sent before a response is received for the original

                                                request.  This is the srcTag of the request paquet that this

                                                response packet is responding to

                @param rqUID    When bridge == 0, this is the last two bits of the unitID of the device

                                                that sent the request this response is responding to

                @param bridge   If this packet comes from the host or a bridge

                @param error    Error returned in the packet

                @param passPW   If this packet can pass posted writes (increased priority)

                @param isoc             This bit either represents if the packet travels in isoc channels

                                                (increased priority)

        */

        TargetDonePacket(const sc_bv<5> &unitID,

                                                 const sc_bv<5> &srcTag,

                                                 const sc_bv<2> &rqUID,

                                                 bool bridge,

                                                 ResponseError error = RE_NORMAL,

                                                 bool passPW = 0,

                                                 bool isoc = 0) :

                ResponsePacket(sc_bv<6>("110011"),

                                                  unitID,

                                                  srcTag,

                                                  rqUID,

                                                  bridge,

                                                  error,

                                                  passPW,

                                                  isoc)

        {

        }

        ///To get the command of the packet

        /**

                @return TGTDONE

        */

        virtual PacketCommand getPacketCommand() const{return TGTDONE;}

        ControlPacket* getCopy() const{

                return new TargetDonePacket(bv);

        }

};

#endif