Subversion Repositories zpu

-- ZPU

--

-- Copyright 2004-2009 oharboe - Oyvind Harboe - oyvind.harboe@zylin.com

--

-- The FreeBSD license

--

-- Redistribution and use in source and binary forms, with or without

-- modification, are permitted provided that the following conditions

-- are met:

--

-- 1. Redistributions of source code must retain the above copyright

--    notice, this list of conditions and the following disclaimer.

-- 2. Redistributions in binary form must reproduce the above

--    copyright notice, this list of conditions and the following

--    disclaimer in the documentation and/or other materials

--    provided with the distribution.

--

-- THIS SOFTWARE IS PROVIDED BY THE ZPU PROJECT ``AS IS'' AND ANY

-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE

-- ZPU PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,

-- INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

-- OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

-- HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

-- STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF

-- ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

--

-- The views and conclusions contained in the software and documentation

-- are those of the authors and should not be interpreted as representing

-- official policies, either expressed or implied, of the ZPU Project.

library ieee;

use ieee.std_logic_1164.all;

use ieee.numeric_std.all;

library work;

use work.zpu_config.all;

use work.zpupkg.all;

entity dualport_ram is

port (clk : in std_logic;

        memAWriteEnable : in std_logic;

        memAAddr : in std_logic_vector(maxAddrBitBRAM downto minAddrBit);

        memAWrite : in std_logic_vector(wordSize-1 downto 0);

        memARead : out std_logic_vector(wordSize-1 downto 0);

        memBWriteEnable : in std_logic;

        memBAddr : in std_logic_vector(maxAddrBitBRAM downto minAddrBit);

        memBWrite : in std_logic_vector(wordSize-1 downto 0);

        memBRead : out std_logic_vector(wordSize-1 downto 0));

end dualport_ram;

architecture dualport_ram_arch of dualport_ram is

type ram_type is array(natural range 0 to ((2**(maxAddrBitBRAM+1))/4)-1) of std_logic_vector(wordSize-1 downto 0);

shared variable ram : ram_type :=

(