multiplier one fixed value other user defined

Hi,,
I am interested to write a code where one input is user defined and the
other input is fixed to some value....

for example

0X2=0
1X2=2
2X2=4
3X2=6

here two in fixed (which I want to define as fixed). and 0 , 1, 2 , 3
user defined.


This code is generated using Xilinx webpack...

================================================================
library IEEE;
use IEEE.STD_LOGIC_1164.ALL;
use IEEE.STD_LOGIC_ARITH.ALL;
use IEEE.STD_LOGIC_UNSIGNED.ALL;

---- Uncomment the following library declaration if instantiating
---- any Xilinx primitives in this code.
--library UNISIM;
--use UNISIM.VComponents.all;

entity multo is
Port ( p1 : in std_logic_vector(1 downto 0);
w1 : in std_logic_vector(1 downto 0);
ou : out std_logic_vector(3 downto 0));
end multo;

architecture Behavioral of multo is

begin

ou <= w1 * p1;

end Behavioral;

================================================================

the code works fine.. but in a final result I hv to make a schmatic
symbol of the code.. and I want to keep the fixed input hidden. So the
user just can change the other input and see the results...

anybody with an answer... help me out...

thanks

John