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-- @fileinfo@

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-- Synthesizable ROM implemented on regular FPGA BLock RAM MPU.

--

-- Meant to be used as bootstrap code ROM in project ION, hence the fixed

-- entity name.

--

-- This package provides constants and types that will be used wherever the code

-- BRAM is implemented, presumably in the mips_mpu module (see that module for

-- an usage example).

--

-- Note that no vendor-specific stuff needs to be used at all to infer the

-- read-only, single port BRAM we're interested in.

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-- Copyright (C) 2011 Jose A. Ruiz

--                                                              

-- This source file may be used and distributed without         

-- restriction provided that this copyright statement is not    

-- removed from the file and that any derivative work contains  

-- the original copyright notice and the associated disclaimer. 

--                                                              

-- This source file is free software; you can redistribute it   

-- and/or modify it under the terms of the GNU Lesser General   

-- Public License as published by the Free Software Foundation; 

-- either version 2.1 of the License, or (at your option) any   

-- later version.                                               

--                                                              

-- This source 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 Lesser General Public License for more 

-- details.                                                     

--                                                              

-- You should have received a copy of the GNU Lesser General    

-- Public License along with this source; if not, download it   

-- from http://www.opencores.org/lgpl.shtml

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library ieee;

use ieee.std_logic_1164.all;

use ieee.std_logic_arith.all;

use ieee.std_logic_unsigned.all;

use work.mips_pkg.all;

package code_rom_pkg is

-- BRAM table and address word sizes...

constant CODE_BRAM_SIZE : integer := @code_table_size@;

constant CODE_BRAM_ADDR_SIZE : integer := log2(CODE_BRAM_SIZE);

subtype t_bram_address is std_logic_vector(CODE_BRAM_ADDR_SIZE-1 downto 0);

-- ...and the type of the actual table that will hold the data.

type t_bram is array(0 to (CODE_BRAM_SIZE)-1) of t_word;

-- This constant defines the contents of the BRAM.

constant code_bram :                  t_bram := (@code-32bit@);

end package;