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[/] [ht_tunnel/] [tags/] [START/] [rtl/] [systemc/] [flow_control_l2/] [nop_framer_l3.h] - Rev 19
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//nop_framer_l3.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): * 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 "../core_synth/synth_datatypes.h" #include "../core_synth/constants.h" #ifndef NOP_FRAMER_L3_H #define NOP_FRAMER_L3_H ///Generates nops to send to next node /** @author Jean-Francois Belanger Ami Castonguay @description The nop_framer takes care of generating nop packets. When the RO or DB requests that a packet be sent, it makes sure that the nop gets sent. There are many reasons to send nops : - To update the number of free buffers in the RO and DB - To update the RxNextPacketToAck - To disconnect the link - When there is nothing else to send */ class nop_framer_l3 : public sc_module { public: /// Incomoing signal from the reordering about his buffer status sc_in<sc_bv<6> > ro_buffer_cnt_fc; /// Incomoing signal from the data_buffer about his buffer status sc_in<sc_bv<6> > db_buffer_cnt_fc; ///Reordering requests that a nop be sent sc_in <bool> ro_nop_req_fc; ///Databuffer requests that a nop be sent sc_in <bool> db_nop_req_fc; ///When active, the nop_framer will send nop with only the dsconnect bit set sc_in<bool> generate_disconnect_nop; ///If the RO or DB still have some buffers that can be freed with a nop sc_out<bool> has_nop_buffers_to_send; /// Output of the NOp packet sc_out<sc_bv<32> > ht_nop_pkt; ///A nop is being sent, with the current buffer values from the RO and DB sc_in<bool> fc_nop_sent; ///The next packet to send as soon as possible is a nop sc_out <bool> nop_next_to_send; ///Reset sc_in <bool> resetx; ///Clock sc_in_clk clock; #ifdef RETRY_MODE_ENABLED ///CD maitains a count of valid packet received, that count is then sent in nops sc_in<sc_uint<8> > cd_rx_next_pkt_to_ack_fc; ///If currently in retry mode sc_in <bool> csr_retry; #endif ///Outputs the dword representing the nop void framer( void ); ///Decide if nop_next_to_send_tmp should be set by a request or cleared by a sent nop void nop_decision( void ); ///SystemC Macro SC_HAS_PROCESS(nop_framer_l3); ///Module constructor nop_framer_l3(sc_module_name name); }; #endif