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 | * Copyright (c) UPMC, Lip6, Asim |
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24 | * Cesar Fuguet <cesar.fuguet-tortolero@lip6.fr>, 2014 |
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25 | * |
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26 | */ |
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27 | |
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28 | #include "vci_tsar_config.h" |
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29 | #include "tsar_config.h" |
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30 | |
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31 | namespace soclib { |
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32 | namespace caba { |
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33 | |
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34 | #define tmpl(x) template<typename vci_param> x VciTsarConfig<vci_param> |
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35 | |
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36 | ////////////////////////////////////////////////// |
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37 | tmpl(void)::transition() |
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38 | { |
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39 | p_blackhole_pos = r_blackhole_pos.read(); |
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40 | |
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41 | if (!p_resetn.read()) |
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42 | { |
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43 | r_fsm_state = IDLE; |
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44 | r_blackhole_pos = 0; |
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45 | return; |
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46 | } |
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47 | |
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48 | switch (r_fsm_state.read()) |
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49 | { |
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50 | case IDLE: // waiting a VCI command |
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51 | { |
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52 | if (!p_vci.cmdval.read()) break; |
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53 | |
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54 | vci_addr_t address = p_vci.address.read(); |
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55 | std::list<soclib::common::Segment>::iterator seg; |
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56 | bool seg_error = true; |
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57 | for (seg = m_seglist.begin() ; seg != m_seglist.end() ; seg++) |
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58 | { |
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59 | if (seg->contains(address) and p_vci.eop.read()) |
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60 | { |
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61 | seg_error = false; |
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62 | break; |
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63 | } |
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64 | } |
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65 | |
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66 | r_srcid = p_vci.srcid.read(); |
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67 | r_trdid = p_vci.trdid.read(); |
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68 | r_pktid = p_vci.pktid.read(); |
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69 | |
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70 | if (seg_error) |
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71 | { |
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72 | if (!p_vci.eop.read()) break; |
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73 | r_fsm_state = RSP_ERROR; |
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74 | break; |
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75 | } |
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76 | |
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77 | int reg = (int)((address >> 2) & 0x1) % CONFIG_SPAN; |
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78 | |
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79 | if ((p_vci.cmd.read() == vci_param::CMD_WRITE) && |
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80 | (reg == CONFIG_BHPOS)) |
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81 | { |
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82 | r_blackhole_pos = (int)p_vci.wdata.read(); |
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83 | r_fsm_state = RSP_WRITE; |
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84 | break; |
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85 | } |
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86 | if ((p_vci.cmd.read() == vci_param::CMD_READ) && |
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87 | (reg == CONFIG_BHPOS)) |
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88 | { |
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89 | r_rdata = (vci_data_t)r_blackhole_pos.read(); |
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90 | r_fsm_state = RSP_READ; |
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91 | break; |
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92 | } |
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93 | if (p_vci.eop.read()) |
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94 | { |
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95 | r_fsm_state = RSP_ERROR; |
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96 | } |
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97 | break; |
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98 | } // end case IDLE |
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99 | case RSP_ERROR: // return an error response |
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100 | case RSP_READ: // return a valid read response |
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101 | case RSP_WRITE: // return a valid write response |
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102 | { |
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103 | if (p_vci.rspack.read()) |
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104 | { |
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105 | r_fsm_state = IDLE; |
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106 | } |
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107 | break; |
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108 | } |
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109 | } // end switch r_fsm_state |
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110 | } // end transition |
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111 | |
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112 | ////////////////////////////////////////////////// |
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113 | tmpl(void)::genMoore() |
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114 | { |
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115 | p_vci.rsrcid = r_srcid.read(); |
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116 | p_vci.rtrdid = r_trdid.read(); |
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117 | p_vci.rpktid = r_pktid.read(); |
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118 | p_vci.reop = true; |
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119 | |
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120 | switch(r_fsm_state.read()) |
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121 | { |
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122 | case IDLE: |
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123 | p_vci.cmdack = true; |
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124 | p_vci.rspval = false; |
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125 | p_vci.rdata = 0; |
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126 | p_vci.rerror = vci_param::ERR_NORMAL; |
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127 | break; |
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128 | |
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129 | case RSP_WRITE: |
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130 | p_vci.cmdack = false; |
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131 | p_vci.rspval = true; |
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132 | p_vci.rdata = 0; |
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133 | p_vci.rerror = vci_param::ERR_NORMAL; |
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134 | break; |
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135 | |
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136 | case RSP_READ: |
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137 | p_vci.cmdack = false; |
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138 | p_vci.rspval = true; |
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139 | p_vci.rdata = r_rdata.read(); |
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140 | p_vci.rerror = vci_param::ERR_NORMAL; |
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141 | break; |
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142 | |
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143 | case RSP_ERROR: |
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144 | p_vci.cmdack = false; |
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145 | p_vci.rspval = true; |
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146 | p_vci.rdata = 0; |
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147 | p_vci.rerror = vci_param::ERR_GENERAL_DATA_ERROR; |
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148 | break; |
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149 | } |
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150 | } // end genMoore() |
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151 | |
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152 | ////////////////////////////////////////////////// |
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153 | tmpl(/**/)::VciTsarConfig(sc_module_name name, |
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154 | const IntTab &index, |
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155 | const MappingTable &mt) |
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156 | : soclib::caba::BaseModule(name), |
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157 | p_clk("clk"), |
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158 | p_resetn("resetn"), |
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159 | p_vci("vci"), |
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160 | m_seglist(mt.getSegmentList(index)) |
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161 | { |
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162 | SC_METHOD(transition); |
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163 | dont_initialize(); |
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164 | sensitive << p_clk.pos(); |
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165 | |
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166 | SC_METHOD(genMoore); |
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167 | dont_initialize(); |
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168 | sensitive << p_clk.neg(); |
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169 | } |
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170 | |
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171 | ////////////////////////////////////////////////// |
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172 | tmpl(/**/)::~VciTsarConfig() |
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173 | { |
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174 | } |
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175 | |
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176 | ////////////////////////////////////////////////// |
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177 | tmpl(void)::print_trace() |
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178 | { |
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179 | const char* state_str[] = {"IDLE", |
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180 | "RSP_WRITE", |
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181 | "RSP_READ", |
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182 | "RSP_ERROR"}; |
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183 | |
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184 | std::cout << "VCI_TSAR_CONFIG " << name() |
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185 | << " : state = " << state_str[r_fsm_state.read()] << std::endl; |
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186 | } |
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187 | |
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188 | }} |
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189 | |
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190 | // Local Variables: |
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191 | // tab-width: 4 |
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192 | // c-basic-offset: 4 |
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193 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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194 | // indent-tabs-mode: nil |
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195 | // End: |
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196 | |
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197 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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198 | |
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