1 | /* -*- c++ -*- |
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2 | * File : vci_vdspin_target_wrapper.h |
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3 | * Copyright (c) UPMC, Lip6 |
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4 | * Author : Alain Greiner |
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5 | * |
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6 | * SOCLIB_LGPL_HEADER_BEGIN |
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7 | * |
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8 | * This file is part of SoCLib, GNU LGPLv2.1. |
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9 | * |
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10 | * SoCLib is free software; you can redistribute it and/or modify it |
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11 | * under the terms of the GNU Lesser General Public License as published |
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12 | * by the Free Software Foundation; version 2.1 of the License. |
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13 | * |
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14 | * SoCLib is distributed in the hope that it will be useful, but |
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15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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17 | * Lesser General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU Lesser General Public |
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20 | * License along with SoCLib; if not, write to the Free Software |
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21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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22 | * 02110-1301 USA |
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23 | * |
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24 | * SOCLIB_LGPL_HEADER_END |
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25 | * |
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26 | * Maintainers: alexandre.joannou@lip6.fr |
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27 | * |
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28 | */ |
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29 | |
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30 | ///////////////////////////////////////////////////////////////////////// |
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31 | // This component performs the protocol translation between VCI & DSPIN, |
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32 | // and can be used to connect a VCI target to a DSPIN netnork. |
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33 | // It is implemented as two fully independant sub-components: |
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34 | // - translation from a DSPIN CMD to a VCI CMD |
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35 | // - translation from a VCI RSP to a DSPIN RSP |
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36 | // Each subcomponent contains a FIFO containing DSPIN flits. |
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37 | // For the DSPIN interfaces, the widths of the CMD & RSP flits |
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38 | // are defined as template parameters for future evolutions, |
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39 | // but the VCI to DSPIN translation makes the following assumptions: |
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40 | // - DSPIN CMD flit width == 40 bits |
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41 | // - DSPIN RSP flit width == 33 bits |
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42 | // - VCI address width <= 40 bits |
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43 | // - VCI data == 32 bits |
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44 | // - VCI plen == 8 bits |
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45 | // - VCI srcid <= 14 bits |
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46 | // - VCI trdid <= 4 bits |
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47 | // - VCI pktid <= 4 bits |
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48 | // - VCI rerror == 1 bit |
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49 | //////////////////////////////////////////////////////////////////////// |
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50 | |
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51 | #ifndef VCI_VDSPIN_TARGET_WRAPPER_H_ |
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52 | #define VCI_VDSPIN_TARGET_WRAPPER_H_ |
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53 | |
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54 | #include <systemc> |
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55 | #include <assert.h> |
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56 | #include "caba_base_module.h" |
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57 | #include "vci_initiator.h" |
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58 | #include "generic_fifo.h" |
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59 | #include "dspin_interface.h" |
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60 | #include "static_fast_int.h" |
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61 | |
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62 | namespace soclib { namespace caba { |
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63 | |
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64 | |
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65 | template<typename vci_param, int dspin_cmd_width, int dspin_rsp_width> |
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66 | class VciVdspinTargetWrapper |
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67 | : public soclib::caba::BaseModule |
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68 | { |
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69 | |
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70 | // Command FSM |
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71 | enum fsm_state_cmd{ |
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72 | CMD_IDLE, |
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73 | CMD_BROADCAST, |
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74 | CMD_RW, |
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75 | CMD_READ, |
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76 | CMD_WDATA, |
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77 | }; |
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78 | |
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79 | // Response FSM |
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80 | enum fsm_state_rsp{ |
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81 | RSP_IDLE, |
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82 | RSP_DSPIN_SINGLE_FLIT, |
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83 | RSP_DSPIN_MULTI_FLIT, |
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84 | }; |
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85 | |
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86 | protected: |
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87 | SC_HAS_PROCESS(VciVdspinTargetWrapper); |
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88 | |
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89 | public: |
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90 | // ports |
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91 | sc_core::sc_in<bool> p_clk; |
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92 | sc_core::sc_in<bool> p_resetn; |
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93 | soclib::caba::DspinOutput<dspin_rsp_width> p_dspin_out; |
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94 | soclib::caba::DspinInput<dspin_cmd_width> p_dspin_in; |
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95 | soclib::caba::VciInitiator<vci_param> p_vci; |
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96 | |
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97 | // constructor / destructor |
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98 | VciVdspinTargetWrapper( sc_module_name name, |
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99 | size_t cmd_fifo_depth, |
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100 | size_t rsp_fifo_depth ); |
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101 | private: |
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102 | // internal registers |
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103 | sc_core::sc_signal<int> r_cmd_fsm; |
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104 | sc_core::sc_signal<sc_uint<dspin_cmd_width> > r_cmd_buf0; |
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105 | sc_core::sc_signal<sc_uint<dspin_cmd_width> > r_cmd_buf1; |
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106 | sc_core::sc_signal<int> r_rsp_fsm; |
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107 | sc_core::sc_signal<size_t> r_flit_count; |
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108 | |
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109 | // fifos cmd and rsp |
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110 | soclib::caba::GenericFifo<sc_uint<dspin_cmd_width> > r_fifo_cmd; |
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111 | soclib::caba::GenericFifo<sc_uint<dspin_rsp_width> > r_fifo_rsp; |
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112 | |
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113 | // methods systemc |
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114 | void transition(); |
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115 | void genMoore(); |
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116 | |
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117 | public: |
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118 | void print_trace(); |
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119 | |
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120 | }; |
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121 | |
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122 | }} // end namespace |
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123 | |
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124 | #endif // VCI_VDSPIN_TARGET_WRAPPER_H_ |
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125 | |
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126 | // Local Variables: |
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127 | // tab-width: 4 |
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128 | // c-basic-offset: 4 |
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129 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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130 | // indent-tabs-mode: nil |
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131 | // End: |
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132 | |
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133 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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