1 | /* -*- c++ -*- |
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2 | * |
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3 | * SOCLIB_LGPL_HEADER_BEGIN |
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4 | * |
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5 | * This file is part of SoCLib, GNU LGPLv2.1. |
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6 | * |
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7 | * SoCLib is free software; you can redistribute it and/or modify it |
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8 | * under the terms of the GNU Lesser General Public License as published |
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9 | * by the Free Software Foundation; version 2.1 of the License. |
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10 | * |
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11 | * SoCLib is distributed in the hope that it will be useful, but |
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12 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | * Lesser General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU Lesser General Public |
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17 | * License along with SoCLib; if not, write to the Free Software |
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18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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19 | * 02110-1301 USA |
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20 | * |
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21 | * SOCLIB_LGPL_HEADER_END |
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22 | * |
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23 | * Authors : alain.greiner@lip6.fr |
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24 | * Date : august 2013 |
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25 | * Copyright: UPMC - LIP6 |
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26 | * |
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27 | * |
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28 | * Modified by: Cesar Armando Fuguet Tortolero |
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29 | * Date : jul 2015 |
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30 | */ |
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31 | |
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32 | #ifndef DSPIN_BROADCAST_GENERATOR_H |
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33 | #define DSPIN_BROADCAST_GENERATOR_H |
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34 | |
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35 | #include <systemc> |
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36 | #include "caba_base_module.h" |
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37 | #include "dspin_interface.h" |
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38 | #include "generic_fifo.h" |
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39 | #include "alloc_elems.h" |
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40 | |
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41 | //////////////////////////////////////////////////////////////////////////// |
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42 | // This component is a synthetic sender/receiver of DSPIN paquets. It |
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43 | // has two DSPIN ports, and behaves as both a packet generator |
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44 | // (controled by the SEND_FSM), and a packet analyser (controled by |
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45 | // the RECEIVE_FSM). The flit width can be different for send packets |
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46 | // and received packets. These flit widths are template parameters. |
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47 | // |
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48 | // - As a packet generator, it cand send broadcast packets. A first |
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49 | // GENERATOR FSM post dated requests in a FIFO. The CMD FSM consume |
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50 | // these dated requests as soon as the FIFO is not empty, and try to |
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51 | // send broadcast DSPIN packets. |
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52 | // |
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53 | // - The number of flits is exactly two flits for a broadcast |
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54 | // packet. The flit width cannot be less than 33 bits (including |
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55 | // EOP). |
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56 | // |
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57 | // - The first flit is the header, and the second flit contains the |
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58 | // sender absolute date. The constructor parameter (load) define the |
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59 | // requested (offered) load. The accepted load is computed as : |
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60 | // (NB_PACKETS * LENGTH * MESH_SIZE / NB_CYCLES). NB_PACKETS * |
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61 | // LENGTH equals the number of sent flits, and this is multiplied by |
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62 | // MESH_SIZE because the broadcast flits are replicated once for |
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63 | // each cluster in the mesh. |
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64 | // |
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65 | // - As a packet analyser, it computes the total number of received |
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66 | // packets, and the total cumulated latency. |
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67 | // |
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68 | //////////////////////////////////////////////////////////////////////////// |
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69 | // - first flit format in case of a broadcast packet : |
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70 | // |EOP| XMIN | XMAX | YMIN | YMAX |-------------------|BC | |
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71 | // | 0 | 5 | 5 | 5 | 5 | flit_width - 22 | 1 | |
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72 | // |
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73 | // - second flit format : |
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74 | // |EOP|-----------------| date | |
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75 | // | * | flit_width - 33 | 32 | |
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76 | //////////////////////////////////////////////////////////////////////////// |
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77 | // It has three constructors parameters : |
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78 | // - size_t length == number of flits |
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79 | // - size_t load == LOAD*1000 |
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80 | //////////////////////////////////////////////////////////////////////////// |
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81 | |
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82 | namespace soclib { namespace caba { |
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83 | |
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84 | // FSM states |
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85 | enum { |
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86 | SEND_IDLE, |
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87 | SEND_BROADCAST, |
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88 | }; |
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89 | |
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90 | enum { |
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91 | RECEIVE_IDLE, |
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92 | RECEIVE_BROADCAST, |
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93 | }; |
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94 | |
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95 | template<int cmd_width, int rsp_width> |
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96 | class DspinBroadcastGenerator |
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97 | : public soclib::caba::BaseModule |
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98 | { |
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99 | |
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100 | protected: |
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101 | |
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102 | SC_HAS_PROCESS(DspinBroadcastGenerator); |
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103 | |
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104 | public: |
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105 | |
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106 | // ports |
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107 | sc_core::sc_in<bool> p_clk; |
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108 | sc_core::sc_in<bool> p_resetn; |
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109 | soclib::caba::DspinInput<rsp_width> p_in; |
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110 | soclib::caba::DspinOutput<cmd_width> p_out; |
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111 | |
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112 | // constructor |
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113 | DspinBroadcastGenerator( sc_module_name name, |
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114 | const size_t x_size, // # of columns in the mesh |
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115 | const size_t y_size, // # of rows in the mesh |
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116 | const size_t srcid, // source identifier |
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117 | const size_t load, // requested load * 1000 |
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118 | const size_t fifo_depth ); // fifo depth |
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119 | private: |
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120 | |
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121 | // registers |
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122 | sc_core::sc_signal<uint32_t> r_cycles; // cycles counter (date) |
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123 | |
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124 | sc_core::sc_signal<uint32_t> r_fifo_posted; // number of posted requests |
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125 | |
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126 | sc_core::sc_signal<int> r_send_fsm; // SEND state |
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127 | sc_core::sc_signal<size_t> r_send_length; // flit counter |
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128 | sc_core::sc_signal<size_t> r_send_dest; // packet destination (x,y) |
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129 | sc_core::sc_signal<uint32_t> r_send_date; // request date |
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130 | sc_core::sc_signal<uint32_t> r_send_bc_packets; // number of broadcast packets |
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131 | |
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132 | sc_core::sc_signal<int> r_receive_fsm; // RECEIVE FSM state |
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133 | sc_core::sc_signal<size_t> r_receive_bc_packets; // number of broadcast packets |
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134 | sc_core::sc_signal<size_t> r_receive_bc_latency; // cumulated broadcast latency |
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135 | sc_core::sc_signal<size_t> r_receive_bc_max_latency; // max broadcast latency |
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136 | |
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137 | sc_core::sc_signal<size_t> r_max_fill_status; // max fifo fill status |
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138 | |
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139 | // Fifo from GENERATOR FSM to SEND FSM |
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140 | GenericFifo<uint64_t> r_date_fifo; |
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141 | |
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142 | // structural variables |
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143 | const size_t m_x_size; // # of columns of the mesh |
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144 | const size_t m_y_size; // # of rows of the mesh |
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145 | const size_t m_load; // requested load |
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146 | const size_t m_srcid; // seed for random |
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147 | |
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148 | // methods |
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149 | void transition(); |
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150 | void genMoore(); |
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151 | |
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152 | public: |
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153 | |
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154 | void print_trace(); |
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155 | void print_stats(); |
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156 | |
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157 | }; // end class DspinBroadcastGenerator |
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158 | |
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159 | }} // end namespace |
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160 | |
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161 | #endif // end DSPIN_BROADCAST_GENERATOR_H |
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162 | |
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163 | // Local Variables: |
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164 | // tab-width: 4 |
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165 | // c-basic-offset: 4 |
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166 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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167 | // indent-tabs-mode: nil |
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168 | // End: |
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