Subversion Repositories ht_tunnel

//multiplexer_l3.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):

 *   Jean-Francois Belanger

 *   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 "multiplexer_l3.h"

multiplexer_l3::multiplexer_l3(sc_module_name name) : sc_module(name)

{

        SC_METHOD(mux);

        sensitive_pos << clk;

        sensitive_neg << resetx;

        SC_METHOD(output);

        sensitive << registered_output

#ifdef RETRY_MODE_ENABLED

                << crc_output << nop_crc_output <<

                select_crc_output << select_nop_crc_output

#endif

                ;

}

void multiplexer_l3::mux( void )

{

        if (resetx == false) {

                registered_output = 0;

        }

        else {  //fin du non-reset

#ifdef SYSTEMC_SIM

                //GCC comlains if it's not an int that is used for the switch

                //But for synthesis, I don't want to change it to an int because

                //by default an int has a 32 bit width, which is not what I

                //want for a MUX selector!

                switch ((int)fc_ctr_mux.read()) { //synopsys infer_mux

#else

                switch (fc_ctr_mux.read()) { //synopsys infer_mux

#endif          

                case FC_MUX_FWD_LSB:            //fowrard CMD is sent (LSB)

                        {

                        sc_bv<64> packet = fwd_packet.read().packet;

                        registered_output = packet.range(31,0);

                        }

                        break;

                case FC_MUX_FWD_MSB :           // Forward CMD is sent (MSB)

                        {

                        sc_bv<64> packet = fwd_packet.read().packet;

                        registered_output = packet.range(63,32);

                        }

                        break;

                case FC_MUX_DB_DATA:            // Forward data is sent

                        registered_output = db_data_fwd;

                        break;

                case FC_MUX_EH :                //Error handler packet is sent (data or CMD)

                        registered_output = eh_cmd_data_fc;

                        break;

                case FC_MUX_CSR:                //Csr packet is sent (data or CMD

                        registered_output = csr_dword_fc;

                        break;

                case FC_MUX_UI_LSB :            //user CMD is sent (LSB)

                        registered_output = user_packet.read().range(31,0);

                        break;

                case FC_MUX_UI_MSB:             //user CMD is sent (MSB)

                        registered_output = user_packet.read().range(63,32);

                        break;

                case FC_MUX_UI_DATA:            //User data is sent

                        registered_output = ui_data_fc;

                        break;

                case FC_MUX_NOP :               //nop_sent

                        registered_output = ht_nop_pkt;

                        break;

#ifdef RETRY_MODE_ENABLED

                case FC_MUX_HISTORY:

                        registered_output = history_packet;

                        break;

#endif

                default :               //Data not read, keep the same data : FC_MUX_FEEDBACK

                        registered_output = registered_output.read();

                }

        }//fin du non-reset

} // fin de fonction

void multiplexer_l3::output(){

#ifdef RETRY_MODE_ENABLED

        sc_uint<2> selector;

        selector[1] = select_crc_output;

        selector[0] = select_nop_crc_output;

        switch(selector){

        case 2:

                fc_dword_lk = crc_output.read();

                break;

        case 1:

                fc_dword_lk = nop_crc_output.read();

                break;

        default:

                fc_dword_lk = registered_output;

        }

#else

        fc_dword_lk = registered_output;

#endif

}