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--
-- BLK MEM GEN v7_3 Core - Synthesizable Testbench
--
--------------------------------------------------------------------------------
--
-- (c) Copyright 2006_3010 Xilinx, Inc. All rights reserved.
--
-- This file contains confidential and proprietary information
-- of Xilinx, Inc. and is protected under U.S. and
-- international copyright and other intellectual property
-- laws.
--
-- DISCLAIMER
-- This disclaimer is not a license and does not grant any
-- rights to the materials distributed herewith. Except as
-- otherwise provided in a valid license issued to you by
-- Xilinx, and to the maximum extent permitted by applicable
-- law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND
-- WITH ALL FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES
-- AND CONDITIONS, EXPRESS, IMPLIED, OR STATUTORY, INCLUDING
-- BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, NON-
-- INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE; and
-- (2) Xilinx shall not be liable (whether in contract or tort,
-- including negligence, or under any other theory of
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-- related to, arising under or in connection with these
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-- THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS
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--------------------------------------------------------------------------------
--
-- Filename: dual_ram2kx18_synth.vhd
--
-- Description:
--  Synthesizable Testbench
--------------------------------------------------------------------------------
-- Author: IP Solutions Division
--
-- History: Sep 12, 2011 - First Release
--------------------------------------------------------------------------------
--
--------------------------------------------------------------------------------
-- Library Declarations
--------------------------------------------------------------------------------

LIBRARY IEEE;
USE IEEE.STD_LOGIC_1164.ALL;
USE IEEE.STD_LOGIC_UNSIGNED.ALL;
USE IEEE.STD_LOGIC_ARITH.ALL;
USE IEEE.NUMERIC_STD.ALL;
USE IEEE.STD_LOGIC_MISC.ALL;

LIBRARY STD;
USE STD.TEXTIO.ALL;

--LIBRARY unisim;
--USE unisim.vcomponents.ALL;

LIBRARY work;
USE work.ALL;
USE work.BMG_TB_PKG.ALL;

ENTITY dual_ram2kx18_synth IS
PORT(
	CLK_IN     : IN  STD_LOGIC;
	CLKB_IN     : IN  STD_LOGIC;
    RESET_IN   : IN  STD_LOGIC;
    STATUS     : OUT STD_LOGIC_VECTOR(8 DOWNTO 0) := (OTHERS => '0')   --ERROR STATUS OUT OF FPGA
    );
END ENTITY;

ARCHITECTURE dual_ram2kx18_synth_ARCH OF dual_ram2kx18_synth IS


COMPONENT dual_ram2kx18_exdes 
  PORT (
      --Inputs - Port A
    ENA            : IN STD_LOGIC;  --opt port
    WEA            : IN STD_LOGIC_VECTOR(0 DOWNTO 0);
    ADDRA          : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
    DINA           : IN STD_LOGIC_VECTOR(17 DOWNTO 0);
    CLKA       : IN STD_LOGIC;

      --Inputs - Port B
    ENB            : IN STD_LOGIC;  --opt port
    ADDRB          : IN STD_LOGIC_VECTOR(10 DOWNTO 0);
    DOUTB          : OUT STD_LOGIC_VECTOR(17 DOWNTO 0);
    CLKB           : IN STD_LOGIC

  );

END COMPONENT;


  SIGNAL CLKA: STD_LOGIC := '0';
  SIGNAL RSTA: STD_LOGIC := '0';
  SIGNAL ENA: STD_LOGIC := '0';
  SIGNAL ENA_R: STD_LOGIC := '0';
  SIGNAL WEA: STD_LOGIC_VECTOR(0 DOWNTO 0) := (OTHERS => '0');
  SIGNAL WEA_R: STD_LOGIC_VECTOR(0 DOWNTO 0) := (OTHERS => '0');
  SIGNAL ADDRA: STD_LOGIC_VECTOR(10 DOWNTO 0) := (OTHERS => '0');
  SIGNAL ADDRA_R: STD_LOGIC_VECTOR(10 DOWNTO 0) := (OTHERS => '0');
  SIGNAL DINA: STD_LOGIC_VECTOR(17 DOWNTO 0) := (OTHERS => '0');
  SIGNAL DINA_R: STD_LOGIC_VECTOR(17 DOWNTO 0) := (OTHERS => '0');
  SIGNAL CLKB: STD_LOGIC := '0';
  SIGNAL RSTB: STD_LOGIC := '0';
  SIGNAL ENB: STD_LOGIC := '0';
  SIGNAL ENB_R: STD_LOGIC := '0';
  SIGNAL ADDRB: STD_LOGIC_VECTOR(10 DOWNTO 0) := (OTHERS => '0');
  SIGNAL ADDRB_R: STD_LOGIC_VECTOR(10 DOWNTO 0) := (OTHERS => '0');
  SIGNAL DOUTB: STD_LOGIC_VECTOR(17 DOWNTO 0);
  SIGNAL CHECKER_EN : STD_LOGIC:='0';
  SIGNAL CHECKER_EN_R : STD_LOGIC:='0';
  SIGNAL STIMULUS_FLOW : STD_LOGIC_VECTOR(22 DOWNTO 0) := (OTHERS =>'0');
  SIGNAL clk_in_i: STD_LOGIC;
 
  SIGNAL RESET_SYNC_R1 : STD_LOGIC:='1';
  SIGNAL RESET_SYNC_R2 : STD_LOGIC:='1';
  SIGNAL RESET_SYNC_R3 : STD_LOGIC:='1';

  SIGNAL clkb_in_i: STD_LOGIC;
  SIGNAL RESETB_SYNC_R1 : STD_LOGIC := '1';
  SIGNAL RESETB_SYNC_R2 : STD_LOGIC := '1';
  SIGNAL RESETB_SYNC_R3 : STD_LOGIC := '1';
  SIGNAL ITER_R0 : STD_LOGIC := '0';
  SIGNAL ITER_R1 : STD_LOGIC := '0';
  SIGNAL ITER_R2 : STD_LOGIC := '0';

  SIGNAL ISSUE_FLAG : STD_LOGIC_VECTOR(7 DOWNTO 0) := (OTHERS => '0');
  SIGNAL ISSUE_FLAG_STATUS : STD_LOGIC_VECTOR(7 DOWNTO 0) := (OTHERS => '0');

  BEGIN

--  clk_buf: bufg
--    PORT map(
--      i => CLK_IN,
--      o => clk_in_i
--    );
   clk_in_i <= CLK_IN;
   CLKA <= clk_in_i;

--  clkb_buf: bufg
--    PORT map(
--      i => CLKB_IN,
--      o => clkb_in_i
--    );
   clkb_in_i <= CLKB_IN;
   CLKB <= clkb_in_i;
   RSTA <= RESET_SYNC_R3 AFTER 50 ns;


   PROCESS(clk_in_i)
   BEGIN
      IF(RISING_EDGE(clk_in_i)) THEN
		 RESET_SYNC_R1 <= RESET_IN;
		 RESET_SYNC_R2 <= RESET_SYNC_R1;
		 RESET_SYNC_R3 <= RESET_SYNC_R2;
	  END IF;
   END PROCESS;

   RSTB <= RESETB_SYNC_R3 AFTER 50 ns;

   PROCESS(clkb_in_i)
   BEGIN
      IF(RISING_EDGE(clkb_in_i)) THEN
		 RESETB_SYNC_R1 <= RESET_IN;
		 RESETB_SYNC_R2 <= RESETB_SYNC_R1;
		 RESETB_SYNC_R3 <= RESETB_SYNC_R2;
	  END IF;
   END PROCESS;

PROCESS(CLKA)
BEGIN
  IF(RISING_EDGE(CLKA)) THEN
    IF(RESET_SYNC_R3='1') THEN
        ISSUE_FLAG_STATUS<= (OTHERS => '0'); 
	  ELSE
        ISSUE_FLAG_STATUS <= ISSUE_FLAG_STATUS OR ISSUE_FLAG;
   END IF;
  END IF;
END PROCESS;

STATUS(7 DOWNTO 0) <= ISSUE_FLAG_STATUS;




   BMG_DATA_CHECKER_INST: ENTITY work.CHECKER
      GENERIC MAP ( 
         WRITE_WIDTH => 18,
		 READ_WIDTH  => 18      )
      PORT MAP (
         CLK      => clkb_in_i,
         RST      => RSTB, 
         EN       => CHECKER_EN_R,
         DATA_IN  => DOUTB,
         STATUS   => ISSUE_FLAG(0)
	   );

   PROCESS(clkb_in_i)
   BEGIN
      IF(RISING_EDGE(clkb_in_i)) THEN
         IF(RSTB='1') THEN
		    CHECKER_EN_R <= '0';
	     ELSE
		    CHECKER_EN_R <= CHECKER_EN AFTER 50 ns;
         END IF;
      END IF;
   END PROCESS;


 BMG_STIM_GEN_INST:ENTITY work.BMG_STIM_GEN
     PORT MAP(
       CLKA => clk_in_i,
       CLKB => clkb_in_i,
       TB_RST => RSTA,
       ADDRA  => ADDRA,
       DINA => DINA,
       ENA => ENA,
       WEA => WEA,
       ADDRB => ADDRB,
       ENB => ENB,
	   CHECK_DATA => CHECKER_EN
     );
  PROCESS(CLKA)
  BEGIN
    IF(RISING_EDGE(CLKA)) THEN
	  IF(RESET_SYNC_R3='1') THEN
		STATUS(8) <= '0';
		iter_r2 <= '0';
		iter_r1 <= '0';
		iter_r0 <= '0';
	  ELSE
		STATUS(8) <= iter_r2;
		iter_r2 <= iter_r1;
		iter_r1 <= iter_r0;
		iter_r0 <= STIMULUS_FLOW(8);
      END IF;
    END IF;
  END PROCESS;


  PROCESS(CLKA)
  BEGIN
    IF(RISING_EDGE(CLKA)) THEN
	  IF(RESET_SYNC_R3='1') THEN
	      STIMULUS_FLOW <= (OTHERS => '0'); 
       ELSIF(WEA(0)='1') THEN
	      STIMULUS_FLOW <= STIMULUS_FLOW+1;
     END IF;
	    END IF;
      END PROCESS;



      PROCESS(CLKA)
      BEGIN
        IF(RISING_EDGE(CLKA)) THEN
		  IF(RESET_SYNC_R3='1') THEN
            ENA_R <= '0' AFTER 50 ns;
            WEA_R  <= (OTHERS=>'0') AFTER 50 ns;
            DINA_R <= (OTHERS=>'0') AFTER 50 ns;
            ENB_R <= '0' AFTER 50 ns;
          

           ELSE
          ENA_R <= ENA AFTER 50 ns;
            WEA_R  <= WEA AFTER 50 ns;
            DINA_R <= DINA AFTER 50 ns;
          ENB_R <= ENB AFTER 50 ns;

         END IF;
	    END IF;
      END PROCESS;


      PROCESS(CLKA)
      BEGIN
        IF(RISING_EDGE(CLKA)) THEN
		  IF(RESET_SYNC_R3='1') THEN
            ADDRA_R <= (OTHERS=> '0') AFTER 50 ns;
            ADDRB_R <= (OTHERS=> '0') AFTER 50 ns;
          ELSE
            ADDRA_R <= ADDRA AFTER 50 ns;
            ADDRB_R <= ADDRB AFTER 50 ns;
          END IF;
	    END IF;
      END PROCESS;


    BMG_PORT: dual_ram2kx18_exdes PORT MAP ( 
      --Port A
      ENA        => ENA_R,
      WEA        => WEA_R,
      ADDRA      => ADDRA_R,
      DINA       => DINA_R,
      CLKA       => CLKA,
      --Port B
      ENB        => ENB_R, 
      ADDRB      => ADDRB_R,
      DOUTB      => DOUTB,
      CLKB       => CLKB

    );
END ARCHITECTURE;
