37 lines
28 KiB
VHDL
37 lines
28 KiB
VHDL
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-- Company: INSA-Toulouse
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-- Engineer: Paul Faure
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--
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-- Create Date: 16.04.2021 14:35:04
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-- Module Name: MemoireInstructions - Behavioral
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-- Project Name: Processeur sécurisé
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-- Target Devices: Basys 3 ARTIX7
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-- Tool Versions: Vivado 2016.4
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--
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-- Description: Memoire d'instruction
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-- - Accessible en lecture uniquement
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--
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-- Dependencies: None
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--
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-- Comments : Memoire circulaire, si l'adresse est utilisée modulo la taille de la mémoire
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----------------------------------------------------------------------------------
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library IEEE;
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use IEEE.STD_LOGIC_1164.ALL;
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use IEEE.NUMERIC_STD.ALL;
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entity MemoireInstructions is
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Generic (Nb_bits : Natural; -- Taille d'une instruction en mémoire (Taille d'un code instruction + 3*Taille d'un mot binaire)
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Addr_size : Natural; -- Nombre de bits pour adresser la mémoire
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Mem_size : Natural); -- Taille de la mémoire (nombre d'instructions stockées)
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Port ( Addr : in STD_LOGIC_VECTOR (Addr_size-1 downto 0); -- Une adresse
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D_OUT : out STD_LOGIC_VECTOR (Nb_bits-1 downto 0) := (others => '0')); -- L'instruction presente a cette adresse
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end MemoireInstructions;
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architecture Behavioral of MemoireInstructions is
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signal MEMORY : STD_LOGIC_VECTOR ((Mem_Size * Nb_bits)-1 downto 0) := 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begin
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D_OUT <= MEMORY (((to_integer(unsigned(Addr)) + 1) * Nb_bits) - 1 downto Nb_bits * to_integer(unsigned(Addr)));
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end Behavioral;
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