Subversion Repositories openhmc

/*

 *                              .--------------. .----------------. .------------.

 *                             | .------------. | .--------------. | .----------. |

 *                             | | ____  ____ | | | ____    ____ | | |   ______ | |

 *                             | ||_   ||   _|| | ||_   \  /   _|| | | .' ___  || |

 *       ___  _ __   ___ _ __  | |  | |__| |  | | |  |   \/   |  | | |/ .'   \_|| |

 *      / _ \| '_ \ / _ \ '_ \ | |  |  __  |  | | |  | |\  /| |  | | || |       | |

 *       (_) | |_) |  __/ | | || | _| |  | |_ | | | _| |_\/_| |_ | | |\ `.___.'\| |

 *      \___/| .__/ \___|_| |_|| ||____||____|| | ||_____||_____|| | | `._____.'| |

 *           | |               | |            | | |              | | |          | |

 *           |_|               | '------------' | '--------------' | '----------' |

 *                              '--------------' '----------------' '------------'

 *

 *  openHMC - An Open Source Hybrid Memory Cube Controller

 *  (C) Copyright 2014 Computer Architecture Group - University of Heidelberg

 *  www.ziti.uni-heidelberg.de

 *  B6, 26

 *  68159 Mannheim

 *  Germany

 *

 *  Contact: openhmc@ziti.uni-heidelberg.de

 *  http://ra.ziti.uni-heidelberg.de/openhmc

 *

 *   This source file is free software: you can redistribute it and/or modify

 *   it under the terms of the GNU Lesser General Public License as published by

 *   the Free Software Foundation, either version 3 of the License, or

 *   (at your option) any later version.

 *

 *   This source file is distributed in the hope that it will be useful,

 *   but WITHOUT ANY WARRANTY; without even the implied warranty of

 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *   GNU Lesser General Public License for more details.

 *

 *   You should have received a copy of the GNU Lesser General Public License

 *   along with this source file.  If not, see <http://www.gnu.org/licenses/>.

 *

 *

 *  File name: hmc_field_functions.h

 *

 */

//------------------------------------------------------------------------HMC HEADER FIELDS

 function [5:0] cmd;

    input [127:0] flit;

    begin

        cmd = flit[5:0];

    end

 endfunction

 function [5:0] num_requested_flits;

    input [127:0] flit;

    begin

        num_requested_flits = flit[2:0] + 2;    //+1 for the encoding

    end

 endfunction

 function [2:0] flow_cmd;

    input [127:0] flit;

    begin

        flow_cmd = flit[2:0];

    end

 endfunction

 function [2:0] cmd_type;

    input [127:0] flit;

    begin

        cmd_type = flit[5:3];

    end

 endfunction

 function is_req_flow;

    input [127:0] flit;

    begin

        //according to spec it should check for bits [5:2]. However, all regular requests have bit 3,4 or 5 set so we reduce logic by checking only these

        if(flit[5:3]) begin

            is_req_flow = 0;

        end else begin

            is_req_flow = 1;

        end

    end

 endfunction

 function is_rsp_flow;

    input [127:0] flit;

    begin

        //according to spec it should check for bits [5:2]. However, all responses have bit 5 set so we reduce logic by only checking this single bit

        if(flit[5]) begin

            is_rsp_flow = 0;

        end else begin

            is_rsp_flow = 1;

        end

    end

 endfunction

  function lng_dln_equal;

    input [127:0] flit;

    begin

        if(!(lng(flit)^dln(flit))) begin

            lng_dln_equal = 1;

        end else begin

            lng_dln_equal = 0;

        end

    end

 endfunction

 function irtry_start_retry_flag;

    input [127:0] flit;

    begin

        irtry_start_retry_flag = flit[64+8];

    end

 endfunction

 function irtry_clear_error_flag;

    input [127:0] flit;

    begin

        irtry_clear_error_flag = flit[64+8+1];

    end

 endfunction

 function [3:0] lng;

    input [127:0] flit;

    begin

        lng = flit[10:7];

    end

 endfunction

 function [3:0] dln;

    input [127:0]   flit;

    begin

        dln = flit[14:11];

    end

 endfunction

 function [8:0] tag;

    input [127:0] flit;

    begin

        tag = flit[23:15];

    end

 endfunction

 function [57:24] adrs;

    input [127:0] flit;

    begin

        adrs = flit[57:24];

    end

 endfunction

 function [2:0] cub;

    input [127:0] flit;

    begin

        cub = flit[63:61];

    end

 endfunction

//------------------------------------------------------------------------HMC TAIL FIELDS

 function [7:0] rrp;

    input [127:0]   flit;

    begin

        rrp = flit[64+7:64];

    end

 endfunction

 function [7:0] frp;

    input [127:0]   flit;

    begin

        frp = flit[64+15:64+8];

    end

 endfunction

 function [2:0] seq;

        input [127:0]   flit;

        begin

                seq = flit[64+18:64+16];

        end

 endfunction

 function [6:0] errstat;

        input [127:0]   flit;

        begin

                errstat = flit[64+26:64+20];

        end

 endfunction

 function [4:0] rtc;

        input [127:0]   flit;

        begin

                rtc = flit[64+31:64+27];

        end

 endfunction

 function [31:0] crc;

    input [127:0]   flit;

    begin

        crc = flit[127:128-32];

    end

 endfunction