design/sys/iop/dmu/rtl/dmu_dou_epr.v

// ========== Copyright Header Begin ==========================================
//
// OpenSPARC T2 Processor File: dmu_dou_epr.v
// Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved
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// ========== Copyright Header End ============================================
module dmu_dou_epr
  (
   // Control Signals
   l2clk,
   clk,
   scan_in,
   tcu_array_bypass,
   tcu_se_scancollar_in,
   tcu_se_scancollar_out,
   tcu_array_wr_inhibit,
   tcu_pce_ov,
   tcu_aclk,
   tcu_bclk,
   scan_out,


   // CLU's CRM - DOU's PIO Interface
   cl2do_pio_wr,
   cl2do_pio_addr,
   cl2do_pio_data,
   cl2do_pio_dpar,

   // ILU's EIL - DOU EPR Interface
   // ILU's EIL - DOU
   y2epr_addr,

   // EDR - Mux
   epr2mux_pio_data_out,

   dmu_mb0_run,
   dmu_mb0_addr,
   dmu_mb0_wdata,
   dmu_mb0_dou_pio_data_wr_en,
   dmu_mb0_dou_pio_data_rd_en

   );

  //////////////////////////////////////////////////////////////////////
  //*************************   Parameters   *************************
  //////////////////////////////////////////////////////////////////////

  parameter MEM_WIDTH   = `FIRE_DLC_ERD_DATA_WDTH+`FIRE_DLC_ERD_DPAR_WDTH;
  parameter MEM_TIEHIGH = 1'b1;
//  parameter MEM_TIELOW  = 1'b0;


  //////////////////////////////////////////////////////////////////////
  //*************************   Port Declarations   *******************
  //////////////////////////////////////////////////////////////////////

  // Control signals

  input                                   l2clk;
  input                                   clk;
  input                                   scan_in;
  input                                   tcu_array_bypass;
  input                                   tcu_se_scancollar_in;
  input                                   tcu_se_scancollar_out;
  input                                   tcu_array_wr_inhibit;
  input                                   tcu_pce_ov;
  input                                   tcu_aclk;
  input                                   tcu_bclk;
  output                                  scan_out;

 // CLU's CRM - DOU's EPR PIO Interface
  input                                   cl2do_pio_wr;
  input [`FIRE_DLC_CPD_ADDR_WDTH-1:0]     cl2do_pio_addr; // Address width, to address 64 entries PIO
  input [`FIRE_DLC_CPD_DATA_WDTH-1:0]     cl2do_pio_data; // Data width, 16 bytes
  input [`FIRE_DLC_CPD_DPAR_WDTH-1:0]     cl2do_pio_dpar; // Parity width 32 bit parity on data

  // ILU's EIL - DOU Interface
  input [`FIRE_DLC_ERD_ADDR_WDTH-3:0]     y2epr_addr;     // Address width, to address 128 entries DMA / 64 entries PIO

  // DOU's EPR - Mux
  output [MEM_WIDTH-1:0]                  epr2mux_pio_data_out;  // RAM data output

  // MBIST signals
  input         dmu_mb0_run;

  input [3:0]   dmu_mb0_addr;
  input [7:0]   dmu_mb0_wdata;
  input         dmu_mb0_dou_pio_data_wr_en;
  input         dmu_mb0_dou_pio_data_rd_en;

  //////////////////////////////////////////////////////////////////////
  //***************   Submodule Instantiations   ***********************
  //////////////////////////////////////////////////////////////////////
/*
  fire_dlc_ram64x132_211hd4 ram64x132_211hd4
    (
     // address ports
     .aadr     (y2epr_addr),
     .badr     (cl2do_pio_addr),

     // clock ports
     .clka     (l2clk),
     .clkb     (l2clk),

     // data input ports
     .dib      ({cl2do_pio_dpar, cl2do_pio_data}),

     // data output ports
     .doa      (epr2mux_pio_data_out),

     // port enables
     .ena      (MEM_TIEHIGH),
     .enb      (MEM_TIEHIGH),

     // write enables
     .web      (cl2do_pio_wr)
     );
*/
//BP n2 6-17-04 new ram model
//BP n2 7-20-04 new ram model from ram compiler
//BP n2 9-22-04
//      note that {cl2do_pio_dpar, cl2do_pio_data} come directly from flops in clu

wire    [MEM_WIDTH-1:0] pio_data_out;
assign epr2mux_pio_data_out = tcu_array_bypass ? {cl2do_pio_dpar, cl2do_pio_data} : pio_data_out ;


//SV 02/24/05 added BIST logic
  wire    [131:0]  din_ram  ;
  wire    [3:0]   rd_addr_ram, wr_addr_ram ;
  wire            wr_en_ram, rd_en_ram  ;

  assign  din_ram        =   dmu_mb0_run ? ({dmu_mb0_wdata[3:0],{16{dmu_mb0_wdata}}}) : ({cl2do_pio_dpar, cl2do_pio_data}) ;
  assign  rd_addr_ram    =   dmu_mb0_run ? dmu_mb0_addr[3:0] : y2epr_addr[3:0] ;
  assign  wr_addr_ram    =   dmu_mb0_run ? dmu_mb0_addr[3:0] : cl2do_pio_addr[3:0] ;
  assign  wr_en_ram      =   dmu_mb0_run ? dmu_mb0_dou_pio_data_wr_en : cl2do_pio_wr ;
  assign  rd_en_ram      =   dmu_mb0_run ? dmu_mb0_dou_pio_data_rd_en : MEM_TIEHIGH ;

  /* 0in memory_access -read_addr y2epr_addr[3:0] -read (y2epr_addr[3:0] != cl2do_pio_addr[3:0])
        -write_addr cl2do_pio_addr[3:0]
        -latency 1 -write cl2do_pio_wr
     -read_data  pio_data_out -write_data ({cl2do_pio_dpar, cl2do_pio_data}) -group mbist_mode */

        n2_com_dp_16x132s_cust  dou_pio_ram16x132
        (
     // address ports
     .rd_adr     (rd_addr_ram),
     .wr_adr     (wr_addr_ram),

     // clock ports
     .rdclk     (l2clk),
     .wrclk     (l2clk),

     // data input ports
     .din      (din_ram),

     // data output ports
     .dout      (pio_data_out),

     // port enables
     .rd_en      (rd_en_ram),

     // write enables
     .wr_en      (wr_en_ram),

        // scan ports
        .scan_in                (scan_in),
        .tcu_se_scancollar_in   (tcu_se_scancollar_in),
        .tcu_array_wr_inhibit   (tcu_array_wr_inhibit),
        .tcu_pce_ov             (tcu_pce_ov),
        .rd_pce                 (1'b1),
        .wr_pce                 (1'b1),
        .bist_clk_mux_sel       (1'b0),
        .tcu_aclk               (tcu_aclk),
        .tcu_bclk               (tcu_bclk),
        .scan_out               (scan_out)
     );


endmodule // dmu_dou_epr