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// ===========================================================================
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// File : receive_packet.vri
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// Author : cmagleby
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// Date : Mon Dec 3 11:03:46 MST 2007
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// Project : TI PHY design
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//
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// Copyright (c) notice
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// This code adheres to the GNU public license
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//
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// ===========================================================================
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//
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// $Id: receive_packet.vri,v 1.2 2007-12-07 20:16:29 cmagleby Exp $
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//
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// ===========================================================================
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//
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// $Log: not supported by cvs2svn $
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// Revision 1.1.1.1 2007/12/05 18:37:06 cmagleby
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// importing tb files
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//
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//
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// ===========================================================================
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// Function : This file processes all packets received from the 16 tx interface
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//
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// ===========================================================================
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// ===========================================================================
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#include
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#include "scramble8.vri"
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#define COM_s 8'hbc
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#define SKP_s 8'h1c
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#define IDLE_s 8'h7c
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#define FTS_s 8'h3c
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#define STP_s 8'hfb
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#define SDP_s 8'h5c
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#define EDB 8'hfe
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#define END_s 8'hfd
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task receive_packet () {
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bit [7:0] tx_data[];
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bit tx_datak[];
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integer ret,ret1,ret2,ret3,ret4;
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integer i = 0;
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integer m = 0;
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bit[8:0] tx_pkt;
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event phy_start, phy_done, tlp_start, tlp_done, dllp_start, dllp_done;
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bit [7:0] phy_pkt[];
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bit [7:0] dll_pkt[];
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bit [7:0] tlp_pkt[];
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integer j,k,l;
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bit [127:0] build_phy_pkt;
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bit [47:0] build_dll_pkt;
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bit [127:0] build_tlp_header;
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bit [31:0] build_tlp_data;
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bit [15:0] expected_seq_id = 0;
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bit [15:0] recv_seq_id = 0;
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bit [9:0] recv_length = 0;
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bit [11:0] byte_length = 0;
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bit [31:0] recv_lcrc = 0;
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bit td = 0;
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integer kstart = 0;
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integer debug = 1;
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bit [15:0] lfsr = 16'hFFFF;
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bit [7:0] scramble_data[];
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bit skp_detect = 1'b0;
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bit com_detect = 1'b0;
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bit scram_bypass = 1'b0;
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bit [3:0] bypass_count = 4'b0;
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printf("Look for transmit packets\n");
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wait_var(phy_rdy);
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@ (posedge CLOCK);
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fork
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while (1) {
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@ (posedge CLOCK);
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tx_data[0] = ti_phy_top.txdata16[7:0];
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tx_data[1] = ti_phy_top.txdata16[15:8];
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tx_datak[0] = ti_phy_top.txdatak16[0];
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tx_datak[1] = ti_phy_top.txdatak16[1];
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for (i=0; i<2; i++) {
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if(com_detect == 1'b1){
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scram_bypass = 1'b1;
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}
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else if(((bypass_count == 4'b0011) & tx_datak[i] == 1'b1) | (bypass_count == 4'b1111)){
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scram_bypass = 1'b0;
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}
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if((com_detect == 1'b1) | scram_bypass){
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bypass_count = bypass_count + 1'b1;
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}
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else if(((bypass_count == 4'b0011) & tx_datak[i] == 1'b1) | (bypass_count == 4'b1111)){
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bypass_count = 4'b0000;
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}
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if({tx_datak[i],tx_data[i]} == {1'b1,SKP_s}){
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skp_detect = 1'b1;
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}
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else{
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skp_detect = 1'b0;
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}
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if({tx_datak[i],tx_data[i]} == {1'b1,COM_s}){
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com_detect = 1'b1;
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}
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else{
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com_detect = 1'b0;
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}
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//printf("K-Code = %h DATA = %h COM = %h SKP = %h bypass_count = %d scram_bypass = %h\n",tx_datak[i],tx_data[i],com_detect,skp_detect,bypass_count,scram_bypass);
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//if({tx_datak[i],tx_data[i]} == {1'b1,STP_s}){
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// printf("Start of TLP packet.\n");
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//}
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scramble8(tx_data[i],skp_detect,com_detect,(scram_bypass | tx_datak[i]),lfsr,scramble_data[i],lfsr);
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//printf("K-Code = %h COM = %h SKP = %h bypass = %h scramble_data = %h unscramble_data = %h lfsr = %h bypass_cnt = %d\n",tx_datak[i],com_detect,skp_detect,scram_bypass,tx_data[i],scramble_data[i],lfsr,bypass_count);
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mailbox_put (tx_data_mailbox, {tx_datak[i],scramble_data[i]});
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//printf("Add packet to tx_mailbox %0h\n",tx_data[i]);
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}
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}
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while (1) {
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ret = mailbox_get (WAIT,tx_data_mailbox,tx_pkt,CHECK);
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if (ret <= 0)
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error ("mailbox_get returned %0d\n",ret);
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//printf ("got tx_pkt %0h\n",tx_pkt);
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if (tx_pkt == {1'b1,COM_s}) {
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trigger (ONE_BLAST,phy_start);
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sync (ALL,phy_done);
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}
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if (tx_pkt == {1'b1,STP_s}) {
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trigger (ONE_BLAST,tlp_start);
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sync (ALL,tlp_done);
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}
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if (tx_pkt == {1'b1,SDP_s}) {
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trigger (ONE_BLAST,dllp_start);
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sync (ALL,dllp_done);
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}
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}
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//phy layer packets
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while (1) {
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sync(ALL,phy_start);
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//printf ("got past sync %0h\n",tx_pkt);
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phy_pkt[0] = COM_s;
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phy_pkt[4] = 0;
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phy_pkt[5] = 0;
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phy_pkt[6] = 0;
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phy_pkt[7] = 0;
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phy_pkt[8] = 0;
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phy_pkt[9] = 0;
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phy_pkt[10] = 0;
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phy_pkt[11] = 0;
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phy_pkt[12] = 0;
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phy_pkt[13] = 0;
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phy_pkt[14] = 0;
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phy_pkt[15] = 0;
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ret2 = mailbox_get (WAIT,tx_data_mailbox,tx_pkt,CHECK);
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//printf ("got past mailbox get %0h\n",tx_pkt);
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phy_pkt[1] = tx_pkt;
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//training set
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if ((tx_pkt == 'h1f7) || ~tx_pkt[8]) {
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for (j = 2; j <16; j++) {
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ret2 = mailbox_get (WAIT,tx_data_mailbox,tx_pkt,CHECK);
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phy_pkt[j] = tx_pkt;
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}
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}
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//skip fst idle
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else {
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for (j=2;j<4;j++) {
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ret1 = mailbox_get (WAIT,tx_data_mailbox,tx_pkt,CHECK);
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phy_pkt[j] = tx_pkt;
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//printf ("skip loop got past %0h\n",tx_pkt);
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}
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}
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build_phy_pkt = {phy_pkt[15],phy_pkt[14],phy_pkt[13],phy_pkt[12],phy_pkt[11],
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phy_pkt[10],phy_pkt[9],phy_pkt[8],phy_pkt[7],phy_pkt[6],
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phy_pkt[5],phy_pkt[4],phy_pkt[3],phy_pkt[2],phy_pkt[1],phy_pkt[0]};
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mailbox_put (phy_mailbox, build_phy_pkt);
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printf ("Recieved PHY PACKET (%0h) added to phy mailbox\n",build_phy_pkt);
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trigger (ONE_BLAST,phy_done);
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}
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//dll layer packets
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while (1) {
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sync (ALL,dllp_start);
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//printf ("sync into dllp packet\n");
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for (k = 0; k < 6; k++) {
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ret3 = mailbox_get (WAIT,tx_data_mailbox,tx_pkt,CHECK);
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dll_pkt[k] = tx_pkt;
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//printf ("dll_pkt(%0h)\n",dll_pkt[k]);
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}
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ret3 = mailbox_get (WAIT,tx_data_mailbox,tx_pkt,CHECK);
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//printf ("dll this should be end(%0h)\n",tx_pkt);
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if (tx_pkt == {1'b1,END_s}) {
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build_dll_pkt = {dll_pkt[6],dll_pkt[5],dll_pkt[4],dll_pkt[3],
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dll_pkt[2],dll_pkt[1],dll_pkt[0]};
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mailbox_put (dllp_mailbox, build_dll_pkt);
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printf ("Recieved DLL PACKET (%0h) added to dllp mailbox\n",build_dll_pkt);
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}
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else
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printf ("ERROR ->>>>>>> DLL malformed no END\n");
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trigger (ONE_BLAST,dllp_done);
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}
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//tlp layer packets
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while (1) {
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sync (ALL,tlp_start);
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printf ("sync into tlp packet\n");
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@(posedge CLOCK);
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//3 dw header + seq.
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for (k = 0; k < 14; k++) {
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//printf("debug1 %0d\n",debug++);
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ret4 = mailbox_get (WAIT,tx_data_mailbox,tx_pkt,CHECK);
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tlp_pkt[k] = tx_pkt;
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}
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//dword 4
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if (tlp_pkt[2][5] == 1'b1) {
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for (k=14;k<18;k++) {
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ret4 = mailbox_get (WAIT,tx_data_mailbox,tx_pkt,CHECK);
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tlp_pkt[k] = tx_pkt;
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}
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}
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//****************************************************************************************
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//Check sequence ID and send ACK
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recv_seq_id = {tlp_pkt[0],tlp_pkt[1]};
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if (recv_seq_id != expected_seq_id) printf ("ERROR ->>>>>>> TLP BAD SEQUENCE ID of %0h\n",recv_seq_id);
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else {
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if (!semaphore_get(WAIT,my_semaphore,1))
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error ("Semaphore_get returned 0\n");
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ack_seq_num = new(recv_seq_id[7:0],{4'b0,recv_seq_id[11:8]},8'b0,8'b0);
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ack_seq_num.build_packet("ack");
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printf("ACK PACKET Sequence Number (%0h)\n",recv_seq_id);
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for(m=0; m <= 3; m ++) {
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if(m==0){
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mailbox_put (rx_data_mailbox, {2'b01,ack_seq_num.temp_packet[0][7:0],8'h5C});
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printf("DLLP bytes SDB & DLL_TYPE %h%h.\n",ack_seq_num.temp_packet[0][7:0],8'h5C);
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}
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else if(m==1){
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mailbox_put (rx_data_mailbox, {2'b00,ack_seq_num.temp_packet[0][23:16],ack_seq_num.temp_packet[0][15:8]});
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printf("DLLP bytes 2 & 1 %h%h.\n",ack_seq_num.temp_packet[0][23:16],ack_seq_num.temp_packet[0][15:8]);
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}
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else if(m==2){
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mailbox_put (rx_data_mailbox, {2'b00,ack_seq_num.temp_packet[1][7:0],ack_seq_num.temp_packet[0][31:24]});
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printf("DLLP CRC and byte 3 %h%h.\n",ack_seq_num.temp_packet[1][7:0],ack_seq_num.temp_packet[0][31:24]);
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}
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else if(m==3){
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mailbox_put (rx_data_mailbox, {2'b10,8'hFD,ack_seq_num.temp_packet[1][15:8]});
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printf("DLLP STP and CRC %h%h.\n",8'hFD,ack_seq_num.temp_packet[1][15:8]);
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}
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}
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semaphore_put (my_semaphore, 1);
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}
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expected_seq_id++;
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//****************************************************************************************
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//build tlp get all header information
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build_tlp_header = {tlp_pkt[17],tlp_pkt[16],tlp_pkt[15],tlp_pkt[14],
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tlp_pkt[13],tlp_pkt[12],tlp_pkt[11],tlp_pkt[10],
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tlp_pkt[9],tlp_pkt[8],tlp_pkt[7],tlp_pkt[6],
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tlp_pkt[5],tlp_pkt[4],tlp_pkt[3],tlp_pkt[2]};
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if (build_tlp_header[5] == 1'b0) {
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build_tlp_header[127:96] = 32'b0;
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}
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//****************************************************************************************
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//put header in mailbox
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mailbox_put (tlp_header_mailbox, build_tlp_header);
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printf ("Recieved TLP PACKET (%0h) added to tlp header mailbox\n",build_tlp_header);
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//****************************************************************************************
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//check for data and put into mailbox
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if (build_tlp_header[6] == 1) {
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td = build_tlp_header[23];
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recv_length = {build_tlp_header[17:16],build_tlp_header[31:24]};
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byte_length = (recv_length*4) + (td*4);
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printf ("TLP PACKET Receive Length dw(%0d) byte(%0d)\n",recv_length,byte_length);
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for (k=1;k<=byte_length;k++) {
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ret4 = mailbox_get (WAIT,tx_data_mailbox,tx_pkt,CHECK);
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tlp_pkt[k] = tx_pkt;
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if (k%4 ==0) {
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mailbox_put (tlp_data_mailbox, {tlp_pkt[k],tlp_pkt[k-1],tlp_pkt[k-2],tlp_pkt[k-3]});
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printf ("k = (%0d)\n",k);
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printf ("Recieved TLP DATA (%0h) added to tlp data mailbox\n",{tlp_pkt[k],tlp_pkt[k-1],tlp_pkt[k-2],tlp_pkt[k-3]});
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}
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}
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}
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//****************************************************************************************
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//Read out the LCRC
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for (k=0;k<=3;k++) {
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ret4 = mailbox_get (WAIT,tx_data_mailbox,tx_pkt,CHECK);
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//printf("debug3 %0d\n",debug++);
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tlp_pkt[k] = tx_pkt;
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}
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printf ("tlp lcrc value = %0h \n",{tlp_pkt[3],tlp_pkt[2],tlp_pkt[1],tlp_pkt[0]});
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//****************************************************************************************
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//READ out the END VALUE
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ret4 = mailbox_get (WAIT,tx_data_mailbox,tx_pkt,CHECK);
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if (tx_pkt != {1'b1,END_s}) printf ("ERROR ->>>>>>> TLP malformed no END(%0h)\n",tx_pkt);
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trigger (ONE_BLAST,tlp_done);
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}
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join none
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}
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