[259] | 1 | /* -*- c++ -*- |
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| 2 | * File : vci_vdspin_initiator_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 | |
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| 27 | ///////////////////////////////////////////////////////////////////////// |
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| 28 | // This component performs the protocol translation between VCI & DSPIN, |
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| 29 | // and can be used to connect a VCI initiator to a DSPIN network. |
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| 30 | // It is implemented as two fully independant sub-components: |
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| 31 | // - translation from a VCI CMD to a DSPIN CMD |
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| 32 | // - translation from a DSPIN RSP to a VCI RSP |
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| 33 | // Each subcomponent contains a FIFO containing DSPIN flits. |
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| 34 | // For the DSPIN interfaces, the widths of the CMD & RSP flits |
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| 35 | // are defined as template parameters for future evolutions, |
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| 36 | // but the VCI to DSPIN translation makes the following assumptions: |
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| 37 | // - DSPIN CMD flit width = 40 bits |
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| 38 | // - DSPIN RSP flit width = 33 bits |
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| 39 | // - VCI address width <= 40 bits |
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| 40 | // - VCI data == 32 bits |
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| 41 | // - VCI plen == 8 bits |
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| 42 | // - VCI srcid <= 14 bits |
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| 43 | // - VCI trdid <= 8 bits |
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| 44 | // - VCI pktid field not transmitted |
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| 45 | // - VCI rerror == 2 bits |
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| 46 | //////////////////////////////////////////////////////////////////////// |
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| 47 | |
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| 48 | #ifndef VCI_VDSPIN_INITIATOR_WRAPPER_H_ |
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| 49 | #define VCI_VDSPIN_INITIATOR_WRAPPER_H_ |
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| 50 | |
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| 51 | #include <systemc> |
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| 52 | #include <assert.h> |
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| 53 | #include "caba_base_module.h" |
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| 54 | #include "vci_target.h" |
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| 55 | #include "generic_fifo.h" |
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| 56 | #include "dspin_interface.h" |
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| 57 | |
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| 58 | namespace soclib { namespace caba { |
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| 59 | |
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| 60 | template<typename vci_param, int dspin_cmd_width, int dspin_rsp_width> |
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| 61 | class VciVdspinInitiatorWrapper |
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| 62 | : public soclib::caba::BaseModule |
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| 63 | { |
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| 64 | // Command FSM |
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| 65 | enum fsm_state_cmd{ |
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| 66 | CMD_IDLE, |
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| 67 | CMD_BROADCAST, |
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| 68 | CMD_READ, |
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| 69 | CMD_WRITE, |
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| 70 | CMD_WDATA, |
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| 71 | }; |
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| 72 | |
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| 73 | // Response FSM |
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| 74 | enum fsm_state_rsp{ |
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| 75 | RSP_IDLE, |
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| 76 | RSP_READ, |
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| 77 | RSP_WRITE, |
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| 78 | }; |
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| 79 | |
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| 80 | protected: |
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| 81 | SC_HAS_PROCESS(VciVdspinInitiatorWrapper); |
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| 82 | |
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| 83 | public: |
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| 84 | // ports |
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| 85 | sc_core::sc_in<bool> p_clk; |
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| 86 | sc_core::sc_in<bool> p_resetn; |
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| 87 | soclib::caba::DspinOutput<dspin_cmd_width> p_dspin_out; |
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| 88 | soclib::caba::DspinInput<dspin_rsp_width> p_dspin_in; |
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| 89 | soclib::caba::VciTarget<vci_param> p_vci; |
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| 90 | |
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| 91 | // constructor / destructor |
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| 92 | VciVdspinInitiatorWrapper( sc_module_name name, |
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| 93 | size_t cmd_fifo_depth, |
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| 94 | size_t rsp_fifo_depth); |
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| 95 | private: |
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| 96 | // internal registers |
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| 97 | sc_core::sc_signal<int> r_cmd_fsm; |
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| 98 | sc_core::sc_signal<int> r_rsp_fsm; |
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| 99 | sc_core::sc_signal<sc_uint<dspin_rsp_width> > r_rsp_buf; |
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| 100 | |
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| 101 | // fifos cmd and rsp |
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| 102 | soclib::caba::GenericFifo<sc_uint<dspin_cmd_width> > r_fifo_cmd; |
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| 103 | soclib::caba::GenericFifo<sc_uint<dspin_rsp_width> > r_fifo_rsp; |
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| 104 | |
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| 105 | // methods systemc |
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| 106 | void transition(); |
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| 107 | void genMoore(); |
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| 108 | |
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| 109 | public: |
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| 110 | void print_trace(); |
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| 111 | |
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| 112 | }; |
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| 113 | |
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| 114 | }} // end namespace |
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| 115 | |
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| 116 | #endif // VCI_VDSPIN_INITIATOR_WRAPPER_H_ |
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| 117 | |
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| 118 | // Local Variables: |
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| 119 | // tab-width: 4 |
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| 120 | // c-basic-offset: 4 |
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| 121 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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| 122 | // indent-tabs-mode: nil |
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| 123 | // End: |
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| 124 | |
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| 125 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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