design/sys/iop/niu/rtl/niu_ipp_pkt_dsc.v

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/**********************************************************
***********************************************************

    Project         : Niu

    File name       : niu_ipp_pkt_dsc.v

    Module(s) name  : niu_ipp_pkt_dsc

    Parent modules  : niu_ipp.v

    Child modules   :

    Author's name   : George Chu

    Date            : January 2004

    Description     : This file lists packet discard condition

    Synthesis Notes:

    Modification History:

    Date       Description
    ----       -----------

************************************************************
***********************************************************/

module niu_ipp_pkt_dsc (
                        ipp_hfifo_par_err_inc,
                        ipp_runt,
                        clr_ipp_unload,
                        reset,
                        clk,
                        ipp_dsc_pkt,
                        ipp_inc_pkt_dsc_cnt
                       );

input           ipp_hfifo_par_err_inc;
input           ipp_runt;
input           clr_ipp_unload;                 // 1 cycle pulse

input           reset;
input           clk;                            // clock

output          ipp_dsc_pkt;
output          ipp_inc_pkt_dsc_cnt;

reg             ipp_dsc_pkt;
wire            ipp_inc_pkt_dsc_cnt = ipp_dsc_pkt && clr_ipp_unload ||
                                      ipp_runt;

wire            discard_pkt   = (ipp_hfifo_par_err_inc);

wire            n_ipp_dsc_pkt = (reset || clr_ipp_unload) ? 1'h0 :
                                 discard_pkt              ? 1'h1 : ipp_dsc_pkt;

  always @(posedge clk)
    ipp_dsc_pkt <= n_ipp_dsc_pkt;

endmodule