1 | /* -*- c++ -*- |
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2 | * SOCLIB_LGPL_HEADER_BEGIN |
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3 | * |
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4 | * This file is part of SoCLib, GNU LGPLv2.1. |
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5 | * |
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6 | * SoCLib is free software; you can redistribute it and/or modify it |
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7 | * under the terms of the GNU Lesser General Public License as published |
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8 | * by the Free Software Foundation; version 2.1 of the License. |
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9 | * |
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10 | * SoCLib is distributed in the hope that it will be useful, but |
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11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 | * Lesser General Public License for more details. |
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14 | * |
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15 | * You should have received a copy of the GNU Lesser General Public |
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16 | * License along with SoCLib; if not, write to the Free Software |
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17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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18 | * 02110-1301 USA |
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19 | * |
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20 | * SOCLIB_LGPL_HEADER_END |
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21 | * |
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22 | * Author : Abdelmalek SI MERABET |
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23 | * Date : March 2010 |
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24 | * |
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25 | * Copyright: UPMC - LIP6 |
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26 | */ |
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27 | #ifndef SOCLIB_CABA_DSPIN_SIMPLE_RING_TARGET_FAST_C_H |
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28 | #define SOCLIB_CABA_DSPIN_SIMPLE_RING_TARGET_FAST_C_H |
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29 | |
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30 | #include "generic_fifo.h" |
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31 | #include "mapping_table.h" |
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32 | #include "ring_signals_fast.h" |
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33 | #include "dspin_interface.h" |
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34 | |
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35 | #define T_DEBUG |
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36 | |
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37 | namespace soclib { namespace caba { |
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38 | |
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39 | namespace { |
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40 | |
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41 | const char *ring_rsp_fsm_state_str_st[] = { |
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42 | "RSP_IDLE", |
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43 | "DEFAULT", |
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44 | "KEEP", |
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45 | }; |
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46 | |
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47 | #ifdef T_DEBUG |
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48 | |
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49 | const char *ring_cmd_fsm_state_str_st[] = { |
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50 | "CMD_IDLE", |
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51 | "LOCAL", |
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52 | "RING", |
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53 | }; |
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54 | #endif |
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55 | } // end namespace |
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56 | |
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57 | template<typename vci_param, int ring_cmd_data_size, int ring_rsp_data_size> |
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58 | class DspinSimpleRingTargetFastC |
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59 | { |
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60 | |
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61 | typedef typename vci_param::fast_addr_t vci_addr_t; |
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62 | typedef SimpleRingSignals ring_signal_t; |
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63 | typedef DspinOutput<ring_cmd_data_size > cmd_out_t; |
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64 | typedef DspinInput<ring_rsp_data_size > rsp_in_t; |
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65 | |
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66 | private: |
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67 | enum ring_cmd_fsm_state_e { |
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68 | CMD_IDLE, // waiting for first flit of a command packet |
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69 | LOCAL, // next flit of a local cmd packet |
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70 | RING, // next flit of a ring cmd packet |
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71 | }; |
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72 | |
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73 | enum ring_rsp_fsm_state_e { |
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74 | RSP_IDLE, |
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75 | DEFAULT, |
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76 | KEEP, |
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77 | }; |
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78 | |
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79 | // structural parameters |
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80 | std::string m_name; |
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81 | bool m_alloc_target; |
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82 | |
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83 | // internal fifos |
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84 | GenericFifo<uint64_t > m_cmd_fifo; // fifo for the local command paquet |
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85 | GenericFifo<uint64_t > m_rsp_fifo; // fifo for the local response paquet |
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86 | |
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87 | // routing table |
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88 | soclib::common::AddressDecodingTable<vci_addr_t, int> m_rt; |
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89 | // locality table |
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90 | soclib::common::AddressDecodingTable<vci_addr_t, bool> m_lt; |
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91 | |
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92 | int m_tgtid; |
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93 | |
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94 | // internal registers |
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95 | sc_core::sc_signal<uint32_t> r_ring_cmd_fsm; // ring command packet FSM |
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96 | sc_core::sc_signal<uint32_t> r_ring_rsp_fsm; // ring response packet FSM |
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97 | |
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98 | public : |
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99 | |
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100 | #define __renRegTgtS(x) x((((std::string) name)+"_" #x).c_str()) |
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101 | |
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102 | DspinSimpleRingTargetFastC( |
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103 | const char *name, |
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104 | bool alloc_target, |
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105 | const int &wrapper_fifo_depth, |
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106 | const soclib::common::MappingTable &mt, |
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107 | const soclib::common::IntTab &ringid, |
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108 | const int &tgtid) |
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109 | : m_name(name), |
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110 | m_alloc_target(alloc_target), |
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111 | m_cmd_fifo(((std::string) name)+"m_cmd_fifo", wrapper_fifo_depth), |
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112 | m_rsp_fifo(((std::string) name)+"m_rsp_fifo", wrapper_fifo_depth), |
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113 | m_rt(mt.getRoutingTable<typename vci_param::fast_addr_t>(ringid)), |
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114 | m_lt(mt.getLocalityTable<typename vci_param::fast_addr_t>(ringid)), |
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115 | m_tgtid(tgtid), |
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116 | __renRegTgtS(r_ring_cmd_fsm), |
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117 | __renRegTgtS(r_ring_rsp_fsm) |
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118 | |
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119 | {} // end constructor |
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120 | |
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121 | void reset() |
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122 | { |
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123 | if(m_alloc_target) |
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124 | r_ring_rsp_fsm = DEFAULT; |
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125 | else |
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126 | r_ring_rsp_fsm = RSP_IDLE; |
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127 | |
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128 | r_ring_cmd_fsm = CMD_IDLE; |
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129 | m_cmd_fifo.init(); |
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130 | m_rsp_fifo.init(); |
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131 | } |
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132 | void transition(const cmd_out_t &p_cmd_out, const rsp_in_t &p_rsp_in, const ring_signal_t p_ring_in, bool &tgt_cmd_val, rsp_str &tgt_rsp) |
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133 | { |
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134 | |
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135 | bool cmd_fifo_put = false; |
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136 | uint64_t cmd_fifo_data = 0; |
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137 | |
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138 | bool rsp_fifo_get = false; |
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139 | bool rsp_fifo_put = false; |
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140 | uint64_t rsp_fifo_data = 0; |
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141 | |
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142 | |
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143 | //////////// DSPIN FIFOS ACCESS ///////////////////////// |
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144 | |
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145 | if (p_rsp_in.write) { |
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146 | #ifdef T_DEBUG |
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147 | std::cout << sc_time_stamp() << " -- " << m_name << " -- DSPIN FIFO" |
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148 | << " -- rsp in rok : " << p_rsp_in.write |
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149 | << " -- in data : " << std::hex << p_rsp_in.data.read() |
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150 | << " -- fifo wok : " << m_rsp_fifo.wok() |
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151 | << std::endl; |
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152 | #endif |
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153 | |
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154 | rsp_fifo_data = (uint64_t) p_rsp_in.data.read(); |
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155 | rsp_fifo_put = m_rsp_fifo.wok(); |
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156 | } |
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157 | |
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158 | bool cmd_fifo_get = p_cmd_out.read; |
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159 | //////////// RING RSP FSM ///////////////////////// |
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160 | |
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161 | switch( r_ring_rsp_fsm ) |
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162 | { |
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163 | case RSP_IDLE: |
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164 | #ifdef T_DEBUG |
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165 | if(m_rsp_fifo.rok()) |
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166 | std::cout << std::dec << sc_time_stamp() << " - " << m_name |
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167 | << " - r_ring_rsp_fsm = " << ring_rsp_fsm_state_str_st[r_ring_rsp_fsm] |
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168 | << " -- in rsp grant : " << p_ring_in.rsp_grant |
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169 | << " -- in wok : " << p_ring_in.rsp_r |
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170 | << " -- fifo rok : " << m_rsp_fifo.rok() |
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171 | << " -- fifo data : " << std::hex << m_rsp_fifo.read() |
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172 | << std::endl; |
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173 | #endif |
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174 | if ( p_ring_in.rsp_grant && m_rsp_fifo.rok() ) |
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175 | |
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176 | r_ring_rsp_fsm = KEEP; |
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177 | |
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178 | break; |
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179 | |
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180 | case DEFAULT: |
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181 | { |
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182 | #ifdef T_DEBUG |
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183 | if(m_rsp_fifo.rok()) |
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184 | std::cout << std::dec << sc_time_stamp() << " - " << m_name |
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185 | << " - r_ring_rsp_fsm = " << ring_rsp_fsm_state_str_st[r_ring_rsp_fsm] |
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186 | << " -- in rsp grant : " << p_ring_in.rsp_grant |
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187 | << " -- in wok : " << p_ring_in.rsp_r |
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188 | << " -- fifo rok : " << m_rsp_fifo.rok() |
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189 | << " -- fifo data : " << std::hex << m_rsp_fifo.read() |
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190 | << std::endl; |
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191 | #endif |
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192 | bool eop = ( (int) ((m_rsp_fifo.read() >> (ring_rsp_data_size - 1) ) & 0x1) == 1); |
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193 | |
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194 | if ( m_rsp_fifo.rok() && eop && p_ring_in.rsp_r ) |
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195 | { |
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196 | rsp_fifo_get = true; |
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197 | if ( p_ring_in.rsp_grant ) |
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198 | r_ring_rsp_fsm = DEFAULT; |
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199 | else |
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200 | r_ring_rsp_fsm = RSP_IDLE; |
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201 | } |
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202 | |
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203 | if ( m_rsp_fifo.rok() && (!eop || !p_ring_in.rsp_r)) |
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204 | { |
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205 | rsp_fifo_get = p_ring_in.rsp_r; |
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206 | r_ring_rsp_fsm = KEEP; |
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207 | } |
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208 | |
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209 | if ( !m_rsp_fifo.rok() && !p_ring_in.rsp_grant ) |
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210 | r_ring_rsp_fsm = RSP_IDLE; |
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211 | |
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212 | if ( !m_rsp_fifo.rok() && p_ring_in.rsp_grant ) |
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213 | r_ring_rsp_fsm = DEFAULT; |
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214 | } |
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215 | break; |
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216 | |
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217 | case KEEP: |
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218 | #ifdef T_DEBUG |
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219 | if(m_rsp_fifo.rok()) |
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220 | std::cout << std::dec << sc_time_stamp() << " - " << m_name |
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221 | << " - r_ring_rsp_fsm = " << ring_rsp_fsm_state_str_st[r_ring_rsp_fsm] |
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222 | << " -- in rsp grant : " << p_ring_in.rsp_grant |
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223 | << " -- in wok : " << p_ring_in.rsp_r |
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224 | << " -- fifo rok : " << m_rsp_fifo.rok() |
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225 | << " -- fifo data : " << std::hex << m_rsp_fifo.read() |
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226 | << std::endl; |
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227 | #endif |
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228 | if(m_rsp_fifo.rok() && p_ring_in.rsp_r) |
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229 | { |
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230 | bool eop = ( (int) ((m_rsp_fifo.read() >> (ring_rsp_data_size - 1) ) & 0x1) == 1); |
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231 | |
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232 | rsp_fifo_get = true; |
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233 | |
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234 | if (eop) |
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235 | { |
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236 | if ( p_ring_in.rsp_grant ) |
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237 | r_ring_rsp_fsm = DEFAULT; |
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238 | else |
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239 | r_ring_rsp_fsm = RSP_IDLE; |
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240 | } |
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241 | } |
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242 | break; |
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243 | |
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244 | } // end switch ring cmd fsm |
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245 | |
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246 | /////////// RING CMD FSM //////////////////////// |
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247 | switch( r_ring_cmd_fsm ) |
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248 | { |
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249 | |
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250 | case CMD_IDLE: |
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251 | { // for variable scope |
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252 | #ifdef T_DEBUG |
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253 | if(p_ring_in.cmd_w) |
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254 | std::cout << std::dec << sc_time_stamp() << " - " << m_name |
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255 | << " - r_ring_cmd_fsm = " << ring_cmd_fsm_state_str_st[r_ring_cmd_fsm] |
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256 | << " - in gnt : " << p_ring_in.cmd_grant |
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257 | << " - in rok : " << p_ring_in.cmd_w |
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258 | << " - in data : " << std::hex << p_ring_in.cmd_data |
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259 | << " - in wok : " << p_ring_in.cmd_r |
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260 | << " - fifo wok : " << m_cmd_fifo.wok() |
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261 | << std::endl; |
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262 | #endif |
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263 | |
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264 | vci_addr_t rtgtid = (vci_addr_t) (((p_ring_in.cmd_data >> (ring_cmd_data_size-vci_param::S-1)) << (vci_param::N-vci_param::S))); |
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265 | bool islocalm = m_lt[rtgtid] && (m_rt[rtgtid] == m_tgtid); // multicast |
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266 | bool isbrdcst = (p_ring_in.cmd_data & 0x1) == 0x1; |
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267 | bool islocalb = ( (int) ((p_ring_in.cmd_data >> 1 ) & 0xF) == m_tgtid); // broadcast |
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268 | bool eop = ( (int) ((p_ring_in.cmd_data >> (ring_cmd_data_size - 1) ) & 0x1) == 1); |
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269 | |
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270 | if(p_ring_in.cmd_w) |
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271 | { |
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272 | #ifdef T_DEBUG |
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273 | std::cout << std::dec << sc_time_stamp() << " - " << m_name |
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274 | << " - islocalm : " << islocalm |
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275 | << " - isbrdcst : " << isbrdcst |
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276 | << " - islocalb : " << islocalb |
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277 | << " - eop : " << eop |
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278 | << std::endl; |
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279 | #endif |
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280 | if ( (isbrdcst && islocalb) || (!isbrdcst && islocalm) ) |
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281 | { |
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282 | |
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283 | cmd_fifo_put = m_cmd_fifo.wok(); |
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284 | cmd_fifo_data = p_ring_in.cmd_data; |
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285 | |
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286 | if (eop && m_cmd_fifo.wok()) |
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287 | r_ring_cmd_fsm = CMD_IDLE; |
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288 | else |
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289 | r_ring_cmd_fsm = LOCAL; |
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290 | |
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291 | } |
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292 | |
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293 | else |
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294 | { |
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295 | if (eop && p_ring_in.cmd_r) |
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296 | r_ring_cmd_fsm = CMD_IDLE; |
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297 | else |
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298 | r_ring_cmd_fsm = RING; |
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299 | } |
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300 | } |
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301 | else |
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302 | r_ring_cmd_fsm = CMD_IDLE; |
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303 | } |
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304 | |
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305 | break; |
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306 | |
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307 | case LOCAL: |
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308 | { |
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309 | #ifdef T_DEBUG |
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310 | if(p_ring_in.cmd_w) |
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311 | std::cout << std::dec << sc_time_stamp() << " - " << m_name |
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312 | << " - r_ring_cmd_fsm = " << ring_cmd_fsm_state_str_st[r_ring_cmd_fsm] |
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313 | << " - in rok : " << p_ring_in.cmd_w |
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314 | << " - in gnt : " << p_ring_in.cmd_grant |
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315 | << " - in data : " << std::hex << p_ring_in.cmd_data |
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316 | << " - in wok : " << p_ring_in.cmd_r |
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317 | << " - fifo wok : " << m_cmd_fifo.wok() |
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318 | << std::endl; |
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319 | #endif |
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320 | bool eop = ( (int) ((p_ring_in.cmd_data >> (ring_cmd_data_size - 1) ) & 0x1) == 1); |
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321 | |
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322 | |
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323 | if ( p_ring_in.cmd_w && m_cmd_fifo.wok() && eop ) |
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324 | { |
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325 | |
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326 | cmd_fifo_put = true; |
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327 | cmd_fifo_data = p_ring_in.cmd_data; |
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328 | r_ring_cmd_fsm = CMD_IDLE; |
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329 | |
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330 | } |
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331 | |
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332 | else // !p_ring_in.cmd_w || !m_cmd_fifo.wok() || !eop |
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333 | { |
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334 | |
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335 | cmd_fifo_put = p_ring_in.cmd_w && m_cmd_fifo.wok(); |
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336 | cmd_fifo_data = p_ring_in.cmd_data; |
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337 | r_ring_cmd_fsm = LOCAL; |
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338 | |
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339 | } |
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340 | } |
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341 | break; |
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342 | |
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343 | case RING: |
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344 | { |
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345 | #ifdef T_DEBUG |
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346 | if(p_ring_in.cmd_w) |
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347 | std::cout << std::dec << sc_time_stamp() << " - " << m_name |
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348 | << " - r_ring_cmd_fsm = " << ring_cmd_fsm_state_str_st[r_ring_cmd_fsm] |
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349 | << " - in rok : " << p_ring_in.cmd_w |
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350 | << " - in gnt : " << p_ring_in.cmd_grant |
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351 | << " - in data : " << std::hex << p_ring_in.cmd_data |
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352 | << " - in wok : " << p_ring_in.cmd_r |
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353 | << " - fifo wok : " << m_cmd_fifo.wok() |
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354 | << std::endl; |
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355 | #endif |
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356 | bool eop = ( (int) ((p_ring_in.cmd_data >> (ring_cmd_data_size - 1) ) & 0x1) == 1); |
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357 | |
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358 | if ( p_ring_in.cmd_w && eop && p_ring_in.cmd_r) { |
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359 | r_ring_cmd_fsm = CMD_IDLE; |
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360 | } |
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361 | else { |
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362 | r_ring_cmd_fsm = RING; |
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363 | } |
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364 | } |
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365 | break; |
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366 | |
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367 | } // end switch cmd fsm |
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368 | |
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369 | //////////////////////// |
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370 | // fifos update // |
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371 | //////////////////////// |
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372 | //-- to keep trace on ring traffic : a valid command is received by the target |
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373 | tgt_rsp.rspval = rsp_fifo_get; |
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374 | tgt_rsp.flit = m_rsp_fifo.read(); |
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375 | tgt_rsp.state = ring_rsp_fsm_state_str_st[r_ring_rsp_fsm]; |
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376 | |
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377 | tgt_cmd_val = cmd_fifo_put; |
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378 | //tgt_rsp_val = rsp_fifo_get; |
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379 | // local cmd fifo update |
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380 | if ( cmd_fifo_put && cmd_fifo_get ) m_cmd_fifo.put_and_get(cmd_fifo_data); |
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381 | else if ( cmd_fifo_put && !cmd_fifo_get ) m_cmd_fifo.simple_put(cmd_fifo_data); |
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382 | else if ( !cmd_fifo_put && cmd_fifo_get ) m_cmd_fifo.simple_get(); |
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383 | // local rsp fifo update |
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384 | if ( rsp_fifo_put && rsp_fifo_get ) m_rsp_fifo.put_and_get(rsp_fifo_data); |
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385 | else if ( rsp_fifo_put && !rsp_fifo_get ) m_rsp_fifo.simple_put(rsp_fifo_data); |
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386 | else if ( !rsp_fifo_put && rsp_fifo_get ) m_rsp_fifo.simple_get(); |
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387 | |
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388 | } // end Transition() |
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389 | |
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390 | /////////////////////////////////////////////////////////////////// |
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391 | void genMoore(cmd_out_t &p_cmd_out, rsp_in_t &p_rsp_in) |
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392 | /////////////////////////////////////////////////////////////////// |
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393 | { |
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394 | p_cmd_out.write = m_cmd_fifo.rok(); |
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395 | p_cmd_out.data = (sc_dt::sc_uint<ring_cmd_data_size>) m_cmd_fifo.read(); |
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396 | |
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397 | p_rsp_in.read = m_rsp_fifo.wok(); |
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398 | |
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399 | } // end genMoore |
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400 | |
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401 | /////////////////////////////////////////////////////////////////// |
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402 | void update_ring_signals(ring_signal_t p_ring_in, ring_signal_t &p_ring_out) |
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403 | /////////////////////////////////////////////////////////////////// |
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404 | { |
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405 | |
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406 | switch( r_ring_rsp_fsm ) |
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407 | { |
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408 | case RSP_IDLE: |
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409 | p_ring_out.rsp_grant = p_ring_in.rsp_grant && !m_rsp_fifo.rok(); |
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410 | |
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411 | p_ring_out.rsp_w = p_ring_in.rsp_w; |
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412 | p_ring_out.rsp_data = p_ring_in.rsp_data; |
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413 | |
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414 | break; |
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415 | |
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416 | case DEFAULT: |
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417 | { |
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418 | bool eop = ( (int) ((m_rsp_fifo.read() >> (ring_rsp_data_size - 1) ) & 0x1) == 1); |
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419 | p_ring_out.rsp_grant = (!m_rsp_fifo.rok() || (eop && p_ring_in.rsp_r)) ; |
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420 | |
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421 | p_ring_out.rsp_w = m_rsp_fifo.rok(); |
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422 | p_ring_out.rsp_data = m_rsp_fifo.read(); |
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423 | |
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424 | } |
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425 | break; |
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426 | |
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427 | case KEEP: |
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428 | { |
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429 | bool eop = ( (int) ((m_rsp_fifo.read() >> (ring_rsp_data_size - 1) ) & 0x1) == 1); |
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430 | p_ring_out.rsp_grant = m_rsp_fifo.rok() && p_ring_in.rsp_r && eop; |
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431 | |
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432 | p_ring_out.rsp_w = m_rsp_fifo.rok(); |
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433 | p_ring_out.rsp_data = m_rsp_fifo.read(); |
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434 | |
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435 | } |
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436 | break; |
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437 | |
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438 | } // end switch |
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439 | p_ring_out.rsp_r = p_ring_in.rsp_r; |
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440 | |
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441 | p_ring_out.cmd_w = p_ring_in.cmd_w; |
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442 | p_ring_out.cmd_data = p_ring_in.cmd_data; |
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443 | p_ring_out.cmd_grant = p_ring_in.cmd_grant; |
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444 | |
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445 | switch( r_ring_cmd_fsm ) |
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446 | { |
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447 | case CMD_IDLE: |
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448 | { |
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449 | vci_addr_t rtgtid = (vci_addr_t) (((p_ring_in.cmd_data >> (ring_cmd_data_size-vci_param::S-1)) << (vci_param::N-vci_param::S))); |
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450 | bool islocalm = m_lt[rtgtid] && (m_rt[rtgtid] == m_tgtid); // multicast |
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451 | bool isbrdcst = (p_ring_in.cmd_data & 0x1) == 0x1; |
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452 | bool islocalb = ( (int) ((p_ring_in.cmd_data >> 1 ) & 0xF) == m_tgtid); // broadcast |
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453 | //bool eop = ( (int) ((p_ring_in.cmd_data >> (ring_cmd_data_size - 1) ) & 0x1) == 1); |
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454 | |
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455 | if (p_ring_in.cmd_w && ((isbrdcst && islocalb) || (!isbrdcst && islocalm))) |
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456 | { |
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457 | p_ring_out.cmd_r = m_cmd_fifo.wok(); |
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458 | } |
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459 | else |
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460 | { |
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461 | p_ring_out.cmd_r = p_ring_in.cmd_r; |
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462 | } |
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463 | } |
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464 | break; |
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465 | |
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466 | case LOCAL: |
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467 | |
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468 | p_ring_out.cmd_r = m_cmd_fifo.wok(); |
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469 | break; |
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470 | |
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471 | case RING: |
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472 | |
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473 | p_ring_out.cmd_r = p_ring_in.cmd_r; |
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474 | break; |
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475 | } // end switch |
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476 | |
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477 | } // end update_ring_signals |
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478 | |
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479 | }; |
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480 | |
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481 | }} // end namespace |
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482 | #endif // SOCLIB_CABA_DSPIN_SIMPLE_RING_TARGET_FAST_C_H |
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483 | |
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