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 | * Nicolas Pouillon <nipo@ssji.net>, 2007 |
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25 | * |
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26 | * Maintainers: alain |
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27 | */ |
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28 | |
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29 | #include "../include/vci_tty_tsar.h" |
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30 | #include "tty.h" |
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31 | |
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32 | #include <stdarg.h> |
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33 | |
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34 | namespace soclib { |
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35 | namespace caba { |
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36 | |
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37 | #define tmpl(t) template<typename vci_param> t VciTtyTsar<vci_param> |
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38 | |
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39 | //////////////////////// |
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40 | tmpl(void)::transition() |
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41 | { |
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42 | if (!p_resetn) |
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43 | { |
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44 | r_fsm_state = IDLE; |
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45 | for( size_t channel = 0 ; channel < m_term.size() ; channel++ ) |
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46 | { |
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47 | r_rx_irq_enable[channel] = 0; |
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48 | r_tx_irq_enable[channel] = 0; |
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49 | } |
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50 | return; |
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51 | } |
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52 | |
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53 | switch ( r_fsm_state.read() ) |
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54 | { |
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55 | ////////// |
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56 | case IDLE: // waiting a VCI command |
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57 | { |
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58 | if ( not p_vci.cmdval.read() ) break; |
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59 | |
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60 | vci_addr_t address = p_vci.address.read(); |
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61 | size_t cell = (size_t)((address & 0xFFF)>>2); |
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62 | size_t reg = cell % TTY_SPAN; |
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63 | size_t channel = cell / TTY_SPAN; |
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64 | bool seg_error = true; |
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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 | std::list<soclib::common::Segment>::iterator seg; |
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71 | for ( seg = m_seglist.begin() ; seg != m_seglist.end() ; seg++ ) |
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72 | { |
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73 | if ( seg->contains( address ) and p_vci.eop.read() ) |
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74 | { |
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75 | seg_error = false; |
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76 | break; |
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77 | } |
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78 | } |
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79 | |
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80 | ///////////////////////////////////////////////////////// |
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81 | if ( not seg_error and // write char |
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82 | (p_vci.cmd.read() == vci_param::CMD_WRITE) and |
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83 | (reg == TTY_WRITE ) and |
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84 | channel < m_term.size() ) |
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85 | { |
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86 | // suppose an infinite write buffer (never full) |
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87 | m_term[channel]->putc( p_vci.wdata.read() ); |
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88 | |
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89 | r_fsm_state = RSP_WRITE; |
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90 | } |
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91 | ///////////////////////////////////////////////////////// |
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92 | else if ( not seg_error and // read char |
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93 | (p_vci.cmd.read() == vci_param::CMD_READ) and |
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94 | (reg == TTY_READ) and |
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95 | channel < m_term.size() ) |
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96 | { |
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97 | vci_data_t byte = m_term[channel]->getc(); |
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98 | |
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99 | // skip CR code |
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100 | if ( byte == 0x0d ) r_rdata = m_term[channel]->getc(); |
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101 | else r_rdata = byte; |
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102 | |
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103 | r_fsm_state = RSP_READ; |
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104 | } |
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105 | ///////////////////////////////////////////////////////// |
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106 | else if ( not seg_error and // read status |
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107 | (p_vci.cmd.read() == vci_param::CMD_READ) and |
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108 | (reg == TTY_STATUS) and |
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109 | channel < m_term.size() ) |
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110 | { |
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111 | // read buffer can be empty => bit 0 can be 0 or 1 |
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112 | // write buffer is never full => bit 1 is always 0 |
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113 | |
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114 | r_rdata = m_term[channel]->hasData(); |
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115 | r_fsm_state = RSP_READ; |
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116 | } |
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117 | ///////////////////////////////////////////////////////// |
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118 | else if ( not seg_error and // set / reset rx_irq |
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119 | (p_vci.cmd.read() == vci_param::CMD_WRITE) and |
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120 | (reg == TTY_RX_IRQ_ENABLE) and |
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121 | channel < m_term.size() ) |
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122 | { |
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123 | r_rx_irq_enable[channel] = p_vci.wdata.read(); |
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124 | r_fsm_state = RSP_WRITE; |
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125 | } |
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126 | ///////////////////////////////////////////////////////// |
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127 | else if ( not seg_error and // set / reset tx_irq |
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128 | (p_vci.cmd.read() == vci_param::CMD_WRITE) and |
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129 | (reg == TTY_TX_IRQ_ENABLE) and |
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130 | channel < m_term.size() ) |
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131 | { |
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132 | r_tx_irq_enable[channel] = p_vci.wdata.read(); |
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133 | r_fsm_state = RSP_WRITE; |
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134 | } |
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135 | ///////////////////////////////////////////////////////// |
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136 | else if ( p_vci.eop.read() ) |
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137 | { |
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138 | r_fsm_state = RSP_ERROR; |
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139 | } |
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140 | break; |
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141 | } |
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142 | /////////////// |
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143 | case RSP_ERROR: // return an error response |
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144 | case RSP_READ: // return a valid read response |
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145 | case RSP_WRITE: // return a valid write response |
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146 | { |
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147 | if ( p_vci.rspack.read() ) r_fsm_state = IDLE; |
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148 | break; |
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149 | } |
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150 | } // end switch r_fsm_state |
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151 | } |
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152 | |
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153 | ////////////////////// |
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154 | tmpl(void)::genMoore() |
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155 | { |
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156 | if ( r_fsm_state.read() == IDLE ) |
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157 | { |
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158 | p_vci.cmdack = true; |
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159 | p_vci.rspval = false; |
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160 | p_vci.rdata = 0; |
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161 | p_vci.rsrcid = 0; |
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162 | p_vci.rtrdid = 0; |
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163 | p_vci.rpktid = 0; |
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164 | p_vci.rerror = vci_param::ERR_NORMAL; |
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165 | p_vci.reop = true; |
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166 | } |
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167 | else if ( r_fsm_state.read() == RSP_WRITE ) |
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168 | { |
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169 | p_vci.cmdack = false; |
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170 | p_vci.rspval = true; |
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171 | p_vci.rdata = 0; |
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172 | p_vci.rsrcid = r_srcid.read(); |
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173 | p_vci.rtrdid = r_trdid.read(); |
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174 | p_vci.rpktid = r_pktid.read(); |
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175 | p_vci.rerror = vci_param::ERR_NORMAL; |
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176 | p_vci.reop = true; |
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177 | } |
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178 | else if ( r_fsm_state.read() == RSP_READ ) |
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179 | { |
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180 | p_vci.cmdack = false; |
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181 | p_vci.rspval = true; |
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182 | p_vci.rdata = r_rdata.read(); |
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183 | p_vci.rsrcid = r_srcid.read(); |
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184 | p_vci.rtrdid = r_trdid.read(); |
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185 | p_vci.rpktid = r_pktid.read(); |
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186 | p_vci.rerror = vci_param::ERR_NORMAL; |
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187 | p_vci.reop = true; |
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188 | } |
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189 | else if ( r_fsm_state.read() == RSP_ERROR ) |
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190 | { |
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191 | p_vci.cmdack = false; |
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192 | p_vci.rspval = true; |
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193 | p_vci.rdata = 0; |
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194 | p_vci.rsrcid = r_srcid.read(); |
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195 | p_vci.rtrdid = r_trdid.read(); |
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196 | p_vci.rpktid = r_pktid.read(); |
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197 | p_vci.rerror = vci_param::ERR_GENERAL_DATA_ERROR; |
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198 | p_vci.reop = true; |
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199 | } |
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200 | |
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201 | for ( size_t channel = 0; channel < m_term.size(); channel++ ) |
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202 | { |
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203 | // activate RX_IRQ if RX buffer not empty and RX_IRQ enable |
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204 | p_irq_rx[channel] = (bool)m_term[channel]->hasData() && |
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205 | r_rx_irq_enable[channel].read(); |
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206 | |
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207 | // activate TX_IRQ if TX_IRQ enable ( TX buffer is never full ) |
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208 | p_irq_tx[channel] = r_tx_irq_enable[channel].read(); |
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209 | } |
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210 | } |
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211 | |
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212 | /////////////////////////////////////////////////////// |
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213 | tmpl(void)::init(const std::vector<std::string> &names) |
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214 | { |
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215 | size_t channel = 0; |
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216 | |
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217 | for ( std::vector<std::string>::const_iterator i = names.begin(); |
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218 | i != names.end(); |
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219 | ++i ) |
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220 | { |
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221 | assert( (channel < 32) and "VCI_TTY_TSAR ERROR : no more than 32 channels"); |
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222 | m_term.push_back(soclib::common::allocateTty(*i)); |
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223 | channel++; |
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224 | } |
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225 | |
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226 | p_irq_rx = new sc_out<bool>[m_term.size()]; |
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227 | p_irq_tx = new sc_out<bool>[m_term.size()]; |
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228 | |
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229 | SC_METHOD(transition); |
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230 | dont_initialize(); |
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231 | sensitive << p_clk.pos(); |
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232 | |
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233 | SC_METHOD(genMoore); |
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234 | dont_initialize(); |
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235 | sensitive << p_clk.neg(); |
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236 | } |
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237 | |
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238 | ///////////////////////////////////////////////// |
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239 | tmpl(/**/)::VciTtyTsar( sc_module_name name, |
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240 | const IntTab &index, |
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241 | const MappingTable &mt, |
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242 | const char *first_name, ...) |
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243 | : soclib::caba::BaseModule(name), |
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244 | p_clk("clk"), |
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245 | p_resetn("resetn"), |
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246 | p_vci("vci"), |
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247 | m_seglist(mt.getSegmentList(index)) |
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248 | { |
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249 | std::cout << " - Building VciTtyTsar " << name << std::endl; |
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250 | |
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251 | std::list<soclib::common::Segment>::iterator seg; |
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252 | for ( seg = m_seglist.begin() ; seg != m_seglist.end() ; seg++ ) |
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253 | { |
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254 | std::cout << " => segment " << seg->name() |
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255 | << " / base = " << std::hex << seg->baseAddress() |
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256 | << " / size = " << seg->size() << std::endl; |
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257 | } |
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258 | |
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259 | va_list va_tty; |
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260 | |
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261 | va_start (va_tty, first_name); |
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262 | std::vector<std::string> args; |
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263 | const char *cur_tty = first_name; |
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264 | while (cur_tty) |
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265 | { |
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266 | args.push_back(cur_tty); |
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267 | |
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268 | cur_tty = va_arg( va_tty, char * ); |
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269 | } |
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270 | va_end( va_tty ); |
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271 | |
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272 | init(args); |
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273 | } |
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274 | |
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275 | ///////////////////////////////////////////////////////////// |
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276 | tmpl(/**/)::VciTtyTsar( sc_module_name name, |
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277 | const IntTab &index, |
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278 | const MappingTable &mt, |
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279 | const std::vector<std::string> &names ) |
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280 | : soclib::caba::BaseModule(name), |
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281 | p_clk("clk"), |
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282 | p_resetn("resetn"), |
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283 | p_vci("vci"), |
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284 | m_seglist(mt.getSegmentList(index)) |
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285 | { |
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286 | std::cout << " - Building VciMultiTTy " << name << std::endl; |
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287 | |
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288 | std::list<soclib::common::Segment>::iterator seg; |
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289 | for ( seg = m_seglist.begin() ; seg != m_seglist.end() ; seg++ ) |
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290 | { |
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291 | std::cout << " => segment " << seg->name() |
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292 | << " / base = " << std::hex << seg->baseAddress() |
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293 | << " / size = " << seg->size() << std::endl; |
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294 | } |
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295 | |
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296 | init(names); |
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297 | } |
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298 | |
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299 | ///////////////////////// |
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300 | tmpl(/**/)::~VciTtyTsar() |
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301 | { |
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302 | for (unsigned int i=0; i<m_term.size(); i++ ) |
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303 | delete m_term[i]; |
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304 | |
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305 | delete[] p_irq_rx; |
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306 | delete[] p_irq_tx; |
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307 | } |
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308 | |
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309 | ///////////////////////////////////////// |
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310 | tmpl(void)::print_trace( size_t channel ) |
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311 | { |
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312 | const char* state_str[] = { "IDLE", |
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313 | "RSP_WRITE", |
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314 | "RSP_READ", |
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315 | "RSP_ERROR", }; |
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316 | |
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317 | std::cout << "MULTI_TTY " << name() |
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318 | << " : fsm = " << state_str[r_fsm_state.read()] << std::dec |
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319 | << " / RX_IRQ[" << channel << "] = " << r_rx_irq_enable[channel].read() |
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320 | << " / TX_IRQ[" << channel << "] = " << r_tx_irq_enable[channel].read() |
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321 | << std::endl; |
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322 | } |
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323 | |
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324 | }} |
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325 | |
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326 | // Local Variables: |
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327 | // tab-width: 4 |
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328 | // c-basic-offset: 4 |
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329 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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330 | // indent-tabs-mode: nil |
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331 | // End: |
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332 | |
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333 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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334 | |
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