libs/n2sram/dp/n2_peu_dp_256x138s_cust_l/n2_peu_dp_256x138s_cust/rtl/n2_peu_dp_256x138s_cust_array.v

// ========== Copyright Header Begin ==========================================
//
// OpenSPARC T2 Processor File: n2_peu_dp_256x138s_cust_array.v
// Copyright (C) 1995-2007 Sun Microsystems, Inc. All Rights Reserved
// 4150 Network Circle, Santa Clara, California 95054, U.S.A.
//
// * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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// choice is available it will apply instead, Sun elects to use only
// the General Public License version 2 (GPLv2) at this time for any
// software where a choice of GPL license versions is made
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// ========== Copyright Header End ============================================
module n2_peu_dp_256x138s_cust_array    (

   wr_addr_array,
   wr_en_array,
   din_array,

   clk,
   rd_addr_array,
   rd_en_array,
   dout_array

);


input     [7:0] wr_addr_array;                  // write port address in
input           wr_en_array;                    // write port enable
input   [137:0] din_array;                      // data in

input           clk;                            // clk
input     [7:0] rd_addr_array;                  // read port address in
input           rd_en_array;                    // read port enable
output  [137:0] dout_array;                     // data out


// ----------------------------------------------------------------------------
// Zero In Checkers
// ----------------------------------------------------------------------------
// checker to verify on accesses's that no bits are x
// 0in kndr -var rd_addr_array
// 0in kndr -var wr_addr_array
// 0in kndr -var rd_en_array
// 0in kndr -var wr_en_array


reg     [137:0] array_ram      [0:255];
reg     [137:0] dout_array;

// Initialize the array
`ifndef NOINITMEM
integer i;

initial begin
  for (i=0; i<256; i=i+1) begin
    array_ram[i] = 138'b0;
  end
end
`endif

// ----------------------------------------------------------------------------
// Read the array
// ----------------------------------------------------------------------------
always @(clk or rd_en_array or rd_addr_array or wr_en_array or wr_addr_array ) begin
   if (clk) begin
      if (rd_en_array) begin
         if (wr_en_array & (rd_addr_array == wr_addr_array))  // 0in < fire -severity 1 -message "Detected rd/wr collision in PEU RBUF RAM, dout driven as X's" -group mbist_mode
            dout_array[137:0] <= {138{1'bx}} ;
         else
            dout_array[137:0] <=  array_ram[rd_addr_array[7:0]];
      end
      else begin
         dout_array[137:0] <= 138'b0 ;
      end
   end
end


// ----------------------------------------------------------------------------
// Write the array, note: it is written when the clock is low
// ----------------------------------------------------------------------------
always @(clk or wr_en_array or wr_addr_array or din_array ) begin
   if (~clk) begin
      if(wr_en_array ) begin
          array_ram[wr_addr_array[7:0]] <= din_array[137:0];
      end
   end
end


endmodule       // n2_peu_dp_256x138s_cust_array