Subversion Repositories mips_fault_tolerant

----------------------------------------------------------------------------------
-- Company: 
-- Engineer: 
-- 
-- Create Date:    23:34:04 06/04/2012 
-- Design Name: 
-- Module Name:    Rom16_S36_2 - Behavioral 
-- Project Name: 
-- Target Devices: 
-- Tool versions: 
-- Description: 
--
-- Dependencies: 
--
-- Revision: 
-- Revision 0.01 - File Created
-- Additional Comments: 
--
----------------------------------------------------------------------------------
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
Library UNISIM;
use UNISIM.vcomponents.all;
 
-- Uncomment the following library declaration if using
-- arithmetic functions with Signed or Unsigned values
--use IEEE.NUMERIC_STD.ALL;
 
-- Uncomment the following library declaration if instantiating
-- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;
 
entity Rom16_S36_2 is
port (
       clk : in std_logic;
       we : in std_logic; 
       en : in std_logic;
       ssr : in std_logic;
       addr : in std_logic_vector(10 downto 2);
       di : in std_logic_vector (31 downto 0);
       do : out std_logic_vector(31 downto 0)
		);
end Rom16_S36_2;
 
architecture Behavioral of Rom16_S36_2 is
signal clk_inv : std_logic;
begin
     process(clk)
	  variable invert : std_logic;
	  begin
	  invert := not clk;
	  clk_inv <= invert;
	  end process;
 -- RAMB16_S36: 512 x 32 + 4 Parity bits Single-Port RAM
   --             Spartan-3
   -- Xilinx HDL Language Template, version 13.1
   RAMB16_S36_inst : RAMB16_S36
   generic map (
      INIT => X"000000000",  --  Value of output RAM registers at startup
      SRVAL => X"000000000", --  Ouput value upon SSR assertion
      WRITE_MODE => "WRITE_FIRST", --  WRITE_FIRST, READ_FIRST or NO_CHANGE
      -- The following INIT_xx declarations specify the initial contents of the RAM
      -- Address 0 to 127
      INIT_00 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_01 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_02 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_03 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_04 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_05 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_06 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_07 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_08 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_09 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_0A => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_0B => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_0C => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_0D => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_0E => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_0F => X"0000000000000000000000000000000000000000000000000000000000000000",
      -- Address 128 to 255
      INIT_10 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_11 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_12 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_13 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_14 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_15 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_16 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_17 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_18 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_19 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_1A => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_1B => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_1C => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_1D => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_1E => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_1F => X"0000000000000000000000000000000000000000000000000000000000000000",
      -- Address 256 to 383
      INIT_20 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_21 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_22 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_23 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_24 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_25 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_26 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_27 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_28 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_29 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_2A => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_2B => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_2C => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_2D => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_2E => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_2F => X"0000000000000000000000000000000000000000000000000000000000000000",
      -- Address 384 to 511
      INIT_30 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_31 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_32 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_33 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_34 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_35 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_36 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_37 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_38 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_39 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_3A => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_3B => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_3C => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_3D => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_3E => X"0000000000000000000000000000000000000000000000000000000000000000",
      INIT_3F => X"0000000000000000000000000000000000000000000000000000000000000000",
      -- The next set of INITP_xx are for the parity bits
      -- Address 0 to 127
      INITP_00 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INITP_01 => X"0000000000000000000000000000000000000000000000000000000000000000",
      -- Address 128 to 255
      INITP_02 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INITP_03 => X"0000000000000000000000000000000000000000000000000000000000000000",
      -- Address 256 to 383
      INITP_04 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INITP_05 => X"0000000000000000000000000000000000000000000000000000000000000000",
      -- Address 384 to 511
      INITP_06 => X"0000000000000000000000000000000000000000000000000000000000000000",
      INITP_07 => X"0000000000000000000000000000000000000000000000000000000000000000")
		port map (
      DO => do,      -- 32-bit Data Output
      DOP => open,    --unused  --dop,    -- 4-bit parity Output
      ADDR => addr,  -- 9-bit Address Input
      CLK => clk_inv,    -- Clock
      DI => di,      -- 32-bit Data Input
      DIP => "1111", --unused di(7 downto 4),    -- 4-bit parity Input
      EN => en,      -- RAM Enable Input
      SSR => ssr,    -- Synchronous Set/Reset Input
      WE => we       -- Write Enable Input
   );
 
   -- End of RAMB16_S36_inst instantiation
end Behavioral;