[451] | 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 | * Alain Greiner <nipo@ssji.net>, 2013 |
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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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[549] | 29 | //////////////////////////////////////////////////////////////////////////////// |
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[451] | 30 | // This component emulates an external IO bus such as PCIe or Hypertransport, |
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[549] | 31 | // but respect the VCI protocol. It can be attached to one OR SEVERAL clusters, |
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| 32 | // using a vci_io_bridge component. |
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| 33 | // It is considered as a local interconnect, for the ADDRESS or SRCID |
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| 34 | // decoding tables: |
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| 35 | // - the CMD routing_table decodes the local field of the VCI ADDRESS |
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| 36 | // to return the local target port |
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| 37 | // - The RSP routing_table decodes the local field of the VCI SRCID |
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[451] | 38 | // to return the initator port |
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| 39 | // It is implemented as two independant crossbars, for VCI commands and |
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| 40 | // VCI responses respectively. |
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[549] | 41 | // - The CMD crossbar has nb_ini input ports, and nb_tgt output ports, |
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| 42 | // including the ports to the vci_io_bridge component(s). |
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[451] | 43 | // - The RSP crossbar has nb_tgt input ports, and nb_ini output ports. |
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[549] | 44 | // including the ports to the vci_io_bridge component(s). |
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[451] | 45 | // For both crossbars, output ports allocation policy is round robin. |
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[549] | 46 | //////////////////////////////////////////////////////////////////////////////// |
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[451] | 47 | |
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| 48 | #ifndef VCI_IOX_NETWORK_H |
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| 49 | #define VCI_IOX_NETWORK_H |
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| 50 | |
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| 51 | #include <systemc> |
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| 52 | #include "caba_base_module.h" |
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| 53 | #include "vci_initiator.h" |
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| 54 | #include "vci_target.h" |
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| 55 | #include "vci_buffers.h" |
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| 56 | #include "mapping_table.h" |
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| 57 | #include "address_decoding_table.h" |
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| 58 | |
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| 59 | namespace soclib { namespace caba { |
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| 60 | |
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| 61 | using namespace sc_core; |
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| 62 | using namespace soclib::common; |
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| 63 | |
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| 64 | template<typename pkt_t> class IoXbar; |
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| 65 | |
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| 66 | /////////////////////////////////////// |
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| 67 | template<typename vci_param> |
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| 68 | class VciIoxNetwork |
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| 69 | /////////////////////////////////////// |
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| 70 | : public BaseModule |
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| 71 | { |
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| 72 | |
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| 73 | public: |
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| 74 | |
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| 75 | sc_in<bool> p_clk; |
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| 76 | sc_in<bool> p_resetn; |
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| 77 | VciInitiator<vci_param>* p_to_tgt; |
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| 78 | VciTarget<vci_param>* p_to_ini; |
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| 79 | |
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| 80 | private: |
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| 81 | |
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| 82 | typedef IoXbar<VciCmdBuffer<vci_param> > cmd_xbar_t; |
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| 83 | typedef IoXbar<VciRspBuffer<vci_param> > rsp_xbar_t; |
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| 84 | |
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| 85 | size_t m_nb_tgt; |
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| 86 | size_t m_nb_ini; |
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| 87 | |
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| 88 | VciInitiator<vci_param>** m_ports_to_target; |
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| 89 | VciTarget<vci_param>** m_ports_to_initiator; |
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| 90 | |
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| 91 | rsp_xbar_t* m_rsp_xbar; // RSP crossbar |
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| 92 | cmd_xbar_t* m_cmd_xbar; // CMD crossbar |
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| 93 | |
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| 94 | AddressDecodingTable<uint64_t,size_t> m_cmd_rt; // routing table for CMD |
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[549] | 95 | AddressDecodingTable<uint32_t,size_t> m_rsp_rt; // routing table for RSP |
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[451] | 96 | |
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| 97 | void transition(); |
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| 98 | |
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| 99 | void genMealy_cmd_val(); |
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| 100 | void genMealy_cmd_ack(); |
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| 101 | void genMealy_rsp_val(); |
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| 102 | void genMealy_rsp_ack(); |
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| 103 | |
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| 104 | protected: |
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| 105 | SC_HAS_PROCESS(VciIoxNetwork); |
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| 106 | |
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| 107 | public: |
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| 108 | void print_trace(); |
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| 109 | |
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| 110 | VciIoxNetwork( sc_module_name name, |
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| 111 | const soclib::common::MappingTable &mt, |
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| 112 | size_t nb_tgt, |
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| 113 | size_t nb_ini ); |
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| 114 | |
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| 115 | ~VciIoxNetwork(); |
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| 116 | }; |
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| 117 | |
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| 118 | }} |
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| 119 | |
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| 120 | #endif |
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| 121 | |
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| 122 | // Local Variables: |
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| 123 | // tab-width: 4 |
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| 124 | // c-basic-offset: 4 |
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| 125 | // c-file-offsets:((innamespace . 0)(inline-open . 0)) |
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| 126 | // indent-tabs-mode: nil |
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| 127 | // End: |
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| 128 | |
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| 129 | // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=4:softtabstop=4 |
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