Subversion Repositories minimips_superscalar

--------------------------------------------------------------------------

--                                                                      --

--                                                                      --

-- miniMIPS Superscalar Processor : miniMIPS Superscalar processor      --

-- based on miniMIPS Processor                                          --

--                                                                      --

--                                                                      --

-- Author : Miguel Cafruni                                              --

-- miguel_cafruni@hotmail.com                                           --

--                                                      December 2018   --

--------------------------------------------------------------------------

library ieee;

use ieee.std_logic_1164.all;

library work;

use work.pack_mips.all;

entity minimips is

port (

    clock    : in std_logic;

    clock2   : in std_logic;

    reset    : in std_logic;

    -- Ram connexion

    ram_req  : out std_logic;

    ram_adr  : out bus32;

    ram_r_w  : out std_logic;

    ram_data : inout bus32;

    ram_ack  : in std_logic;

    ram_req2  : out std_logic;

    ram_adr2  : out bus32;

    ram_r_w2  : out std_logic;

    ram_data2 : inout bus32;

    ram_ack2  : in std_logic;

    -- Hardware interruption

    it_mat   : in std_logic

);

end minimips;

architecture rtl of minimips is

    -- General signals

    signal stop_all : std_logic;            -- Lock the pipeline evolution

    signal stop_all2 : std_logic;           -- Lock the pipeline evolution

    signal it_mat_clk : std_logic;          -- Synchronised hardware interruption

    signal stop_pf : std_logic;             -- Lock the pc

    signal stop_pf2 : std_logic;            -- Lock the pc

    signal genop : std_logic;               -- envoi de nops

    signal genop2 : std_logic;              -- envoi de nops

    -- interface PF - EI

    signal PF_pc : bus32;                   -- PC value

    signal PF_pc_4 : bus32;

    -- interface Controler - EI

    signal CTE_instr : bus32;               -- Instruction from the memory

    signal ETC_adr : bus32;                 -- Address to read in memory

    -- interface Controler - EI2

    signal CTE_instr2 : bus32;               -- Instruction from the memory

    signal ETC_adr2 : bus32;                 -- Address to read in memory

    -- interface EI - DI

    signal EI_instr : bus32;                -- Read interface

    signal EI_adr : bus32;                  -- Address from the read instruction

    signal EI_it_ok : std_logic;            -- Allow hardware interruptions

    -- interface EI2 - DI2

    signal EI_instr2 : bus32;                -- Read interface

    signal EI_adr2 : bus32;                  -- Address from the read instruction

    signal EI_it_ok2 : std_logic;            -- Allow hardware interruptions

    -- DI output

    signal bra_detect : std_logic;          -- Branch detection in the current instruction

    -- DI2 output

    signal bra_detect2 : std_logic;          -- Branch detection in the current instruction

    -- Asynchronous connexion with the bypass unit

    signal adr_reg1 : adr_reg_type;         -- Operand 1 address

    signal adr_reg2 : adr_reg_type;         -- Operand 2 address

    signal use1 : std_logic;                -- Operand 1 utilisation

    signal use2 : std_logic;                -- Operand 2 utilisation

    signal data1 : bus32;                   -- First register value

    signal data2 : bus32;                   -- Second register value

    signal alea : std_logic;                -- Unresolved hazards detected

    -- Asynchronous connexion with the bypass unit

    signal adr_reg3 : adr_reg_type;         -- Operand 1 address

    signal adr_reg4 : adr_reg_type;         -- Operand 2 address

    signal use3 : std_logic;                -- Operand 3 utilisation

    signal use4 : std_logic;                -- Operand 4 utilisation

    signal data3 : bus32;                   -- 3th register value

    signal data4 : bus32;                   -- 4th register value

    signal alea2 : std_logic;                -- Unresolved hazards detected 2nd pipe

    -- interface DI - EX

    signal DI_bra : std_logic;              -- Branch decoded                                        

    signal DI_link : std_logic;             -- A link for that instruction                           

    signal DI_op1 : bus32;                  -- operand 1 for alu                                     

    signal DI_op2 : bus32;                  -- operand 2 for alu                                     

    signal DI_code_ual : alu_ctrl_type;     -- Alu operation                                         

    signal DI_offset : bus32;               -- Offset for the address calculation                    

    signal DI_adr_reg_dest : adr_reg_type;  -- Address of the destination register of the result     

    signal DI_ecr_reg : std_logic;          -- Effective writing of the result                       

    signal DI_mode : std_logic;             -- Address mode (relative to pc or indexed to a register)

    signal DI_op_mem : std_logic;           -- Memory operation request                              

    signal DI_r_w : std_logic;              -- Type of memory operation (reading or writing)         

    signal DI_adr : bus32;                  -- Address of the decoded instruction                    

    signal DI_exc_cause : bus32;            -- Potential exception detected                          

    signal DI_level : level_type;           -- Availability of the result for the data bypass        

    signal DI_it_ok : std_logic;            -- Allow hardware interruptions

    -- interface DI2 - EX2

    signal DI_bra2 : std_logic;              -- Branch decoded                                        

    signal DI_link2 : std_logic;             -- A link for that instruction                           

    signal DI_op3 : bus32;                  -- operand 1 for alu 2                                     

    signal DI_op4 : bus32;                  -- operand 2 for alu 2                                    

    signal DI_code_ual2 : alu_ctrl_type;     -- Alu operation                                         

    signal DI_offset2 : bus32;               -- Offset for the address calculation                    

    signal DI_adr_reg_dest2 : adr_reg_type;  -- Address of the destination register of the result     

    signal DI_ecr_reg2 : std_logic;          -- Effective writing of the result                       

    signal DI_mode2 : std_logic;             -- Address mode (relative to pc or indexed to a register)

    signal DI_op_mem2 : std_logic;           -- Memory operation request                              

    signal DI_r_w2 : std_logic;              -- Type of memory operation (reading or writing)         

    signal DI_adr2 : bus32;                  -- Address of the decoded instruction                    

    signal DI_exc_cause2 : bus32;            -- Potential exception detected                          

    signal DI_level2 : level_type;           -- Availability of the result for the data bypass        

    signal DI_it_ok2 : std_logic;            -- Allow hardware interruptions 

    -- interface EX - MEM

    signal EX_adr : bus32;                  -- Instruction address                       

    signal EX_bra_confirm : std_logic;      -- Branch execution confirmation             

    signal EX_data_ual : bus32;             -- Ual result                                

    signal EX_adresse : bus32;              -- Address calculation result    

    signal ex_adresse_p1p2_s  : bus32;      -- resultado do calculo do endereco do desvio + 4 para pipe 2          

    signal EX_adr_reg_dest : adr_reg_type;  -- Destination register for the result       

    signal EX_ecr_reg : std_logic;          -- Effective writing of the result           

    signal EX_op_mem : std_logic;           -- Memory operation needed                   

    signal EX_r_w : std_logic;              -- Type of memory operation (read or write)  

    signal EX_exc_cause : bus32;            -- Potential cause exception                 

    signal EX_level : level_type;           -- Availability stage of result for bypassing

    signal EX_it_ok : std_logic;            -- Allow hardware interruptions

    -- interface EX2 - MEM

    signal EX_adr2 : bus32;                  -- Instruction address                       

    signal EX_bra_confirm2 : std_logic;      -- Branch execution confirmation             

    signal EX_data_ual2 : bus32;             -- Ual result                                

    signal EX_adresse2 : bus32;              -- Address calculation result   

    signal ex_adresse_p2p1_s  : bus32;       -- resultado do calculo do endereco do desvio + 4 para pipe 1        

    signal EX_adr_reg_dest2 : adr_reg_type;  -- Destination register for the result       

    signal EX_ecr_reg2 : std_logic;          -- Effective writing of the result           

    signal EX_op_mem2 : std_logic;           -- Memory operation needed                   

    signal EX_r_w2 : std_logic;              -- Type of memory operation (read or write)  

    signal EX_exc_cause2 : bus32;            -- Potential cause exception                 

    signal EX_level2 : level_type;           -- Availability stage of result for bypassing

    signal EX_it_ok2 : std_logic;            -- Allow hardware interruptions

    -- interface Controler - MEM

    signal MTC_data : bus32;                -- Data to write in memory 

    signal MTC_adr : bus32;                 -- Address for memory      

    signal MTC_r_w : std_logic;             -- Read/Write in memory    

    signal MTC_req : std_logic;             -- Request access to memory

    signal CTM_data : bus32;                -- Data from memory        

    -- interface Controler2 - MEM

    signal MTC_data2 : bus32;                -- Data to write in memory 

    signal MTC_adr2 : bus32;                 -- Address for memory      

    signal MTC_r_w2 : std_logic;             -- Read/Write in memory    

    signal MTC_req2 : std_logic;             -- Request access to memory

    signal CTM_data2 : bus32;                -- Data from memory  

    -- interface MEM - REG

    signal MEM_adr : bus32;                 -- Instruction address                            

    signal MEM_adr_reg_dest : adr_reg_type; -- Destination register address                   

    signal MEM_ecr_reg : std_logic;         -- Writing of the destination register            

    signal MEM_data_ecr : bus32;            -- Data to write (from alu or memory)             

    signal MEM_exc_cause : bus32;           -- Potential exception cause                      

    signal MEM_level : level_type;          -- Availability stage for the result for bypassing

    signal MEM_it_ok : std_logic;           -- Allow hardware interruptions

    -- connexion to the register banks

      -- Writing commands in the register banks

    signal write_data : bus32;              -- Data to write                                

    signal write_adr : bus5;                -- Address of the register to write             

    signal write_GPR : std_logic;           -- Selection in the internal registers          

    signal write_SCP : std_logic;           -- Selection in the coprocessor system registers

      -- Reading commands for Reading in the registers

    signal read_adr1 : bus5;                -- Address of the first register to read

    signal read_adr2 : bus5;                -- Address of the second register to read

    signal read_data1_GPR : bus32;          -- Value of operand 1 from the internal registers

    signal read_data1_SCP : bus32;          -- Value of operand 2 from the internal registers

    signal read_data2_GPR : bus32;          -- Value of operand 1 from the coprocessor system registers

    signal read_data2_SCP : bus32;          -- Value of operand 2 from the coprocessor system registers

    -- interface MEM - REG duplicado as entradas e saidas do REG

    signal MEM_adr2 : bus32;                 -- Instruction address                            

    signal MEM_adr_reg_dest2 : adr_reg_type; -- Destination register address                   

    signal MEM_ecr_reg2 : std_logic;         -- Writing of the destination register            

    signal MEM_data_ecr2 : bus32;            -- Data to write (from alu or memory)             

    signal MEM_exc_cause2 : bus32;           -- Potential exception cause                      

    signal MEM_level2 : level_type;          -- Availability stage for the result for bypassing

    signal MEM_it_ok2 : std_logic;           -- Allow hardware interruptions

    -- connexion to the register banks

      -- Writing commands in the register banks

    signal write_data2 : bus32;              -- Data to write                                

    signal write_adr2 : bus5;                -- Address of the register to write             

    signal write_GPR2 : std_logic;           -- Selection in the internal registers          

    --signal write_SCP2 : std_logic;           -- Selection in the coprocessor system registers

      -- Reading commands for Reading in the registers

    signal read_adr3 : bus5;                -- Address of the first register to read

    signal read_adr4 : bus5;                -- Address of the second register to read

    signal read_data3_GPR : bus32;          -- Value of operand 1 from the internal registers

    signal read_data3_SCP : bus32;          -- Value of operand 2 from the internal registers

    signal read_data4_GPR : bus32;          -- Value of operand 1 from the coprocessor system registers

    signal read_data4_SCP : bus32;          -- Value of operand 2 from the coprocessor system registers

    -- Interruption controls

    signal interrupt     : std_logic;       -- Interruption to take into account

    signal vecteur_it    : bus32;           -- Interruption vector         

    -- Sinais atrasados meio ciclo

    signal DI_bra_D          : std_logic;

    signal bra_detect_D      : std_logic;

    signal EX_bra_confirm_D  : std_logic;

    signal alea_D               : std_logic;

    signal alea2_D              : std_logic;

    signal EX_bra_confirm2_D : std_logic;

    signal bra_detect2_D     : std_logic;

    signal DI_bra2_D         : std_logic;

    signal iload_D           : bus1; -- sem uso atual

    signal istore_D                       : bus1;

    signal istore2_D              : bus1;

         -- 

    signal istore            : bus1;

    signal iload             : bus1; -- sem uso atual

    signal istore2                        : bus1;

    signal branch1              : std_logic;

    signal branch2              : std_logic;

    signal bra_adr_s         : bus32;

    signal bra_adr2_s        : bus32;

    signal aleaEI                         : bus1;

    signal aleaDI            : bus1;

    signal alea2EI2                       : bus1;

    signal alea2DI2                       : bus1;

    signal ex2_data_hilo          : bus64;--resultado da multiplicacao do pieline2 14-12-18

    signal ex_data_hilo           : bus64;--resultado da multiplicacao do pieline1

begin

    aleaEI  <= alea  or alea2_D;

    aleaDI  <= alea  or alea2_D;

    alea2EI2 <= alea2 or alea_D;

    alea2DI2 <= alea2 or alea_D;

    stop_pf  <= DI_bra or DI_bra2_D or bra_detect or bra_detect2_D or alea or alea2_D or istore2 or istore2_D;

    genop    <= bra_detect or bra_detect2_D or EX_bra_confirm  or EX_bra_confirm2_D or DI_bra or DI_bra2_D  or istore2 or istore2_D;

    stop_pf2 <= DI_bra2 or DI_bra_D or bra_detect2 or bra_detect_D or alea2 or alea_D or istore or istore_D;

    genop2   <= bra_detect2 or bra_detect_D or EX_bra_confirm2 or EX_bra_confirm_D or DI_bra2 or DI_bra_D or istore or istore_D;

    branch1 <= EX_bra_confirm  or EX_bra_confirm2_D;

    branch2 <= EX_bra_confirm2 or EX_bra_confirm_D;

    -- muxes para selecionar o endereco do branh apropriado 12-08-2018

    with EX_bra_confirm2_D select

         bra_adr_s <= ex_adresse_p2p1_s when '1',

                      EX_adresse  when others;

    with EX_bra_confirm_D select

         bra_adr2_s <= ex_adresse_p1p2_s when '1',

                       EX_adresse2  when others;

    -- Take into account the hardware interruption on rising edge

    process (clock)

    begin

        if clock='1' and clock'event then

            it_mat_clk <= it_mat;

        end if;

    end process;

    U1_pf : pps_pf port map (

        clock => clock,

             clock2 => clock2,

        reset => reset,

        stop_all => stop_all,               -- Unconditionnal locking of the pipeline stage

             stop_all2 => stop_all2,

        -- entrees asynchrones

        bra_adr => bra_adr_s,--EX_adresse,              -- Branch

        bra_cmd => branch1,          -- Address to load when an effective branch

        exch_adr => vecteur_it,             -- Exception branch

        exch_cmd => interrupt,              -- Exception vector

        -- entrees asynchrones 24\03\18

        bra_adr2 => bra_adr2_s,-- EX_adresse2,              -- Branch

        bra_cmd2 => branch2,          -- Address to load when an effective branch

        exch_adr2 => vecteur_it,             -- Exception branch

        exch_cmd2 => interrupt,              -- Exception vector

        -- Lock the stage                                    

        stop_pf => stop_pf,

             stop_pf2 => stop_pf2,--estava errado 'stop_pf' corrigido em 03-04-18

        -- Synchronous output to EI stage

        PF_pc => PF_pc,                     -- PC value

             PF_pc_4 => PF_pc_4

    );

    U2_ei : pps_ei port map (

        clock => clock,

        reset => reset,

        clear => interrupt,         -- Clear the pipeline stage                      

        stop_all => stop_all,       -- Evolution locking signal                      

        -- Asynchronous inputs

        stop_ei => aleaEI,            -- Lock the EI_adr and Ei_instr registers        

        genop => genop,             -- Send nops                                     

        -- interface Controler - EI

        CTE_instr => CTE_instr,     -- Instruction from the memory                   

        ETC_adr => ETC_adr,         -- Address to read in memory                     

        -- Synchronous inputs from PF stage

        PF_pc => PF_pc,             -- Current value of the pc                       

        -- Synchronous outputs to DI stage

        EI_instr => EI_instr,       -- Read interface                                

        EI_adr => EI_adr,           -- Address from the read instruction             

        EI_it_ok => EI_it_ok        -- Allow hardware interruptions

    );

    U3_di : pps_di port map (

        clock => clock,

        reset => reset,

        stop_all => stop_all,               -- Unconditionnal locking of the outputs

        clear => interrupt,                 -- Clear the pipeline stage (nop in the outputs)

        -- Asynchronous outputs

        bra_detect => bra_detect,           -- Branch detection in the current instruction

        -- Asynchronous connexion with the register management and data bypass unit

        adr_reg1 => adr_reg1,               -- Address of the first register operand

        adr_reg2 => adr_reg2,               -- Address of the second register operand

        use1 => use1,                       -- Effective use of operand 1

        use2 => use2,                       -- Effective use of operand 2

        --iload => iload,  

             istore => istore,

        stop_di => aleaDI,                    -- Unresolved detected : send nop in the pipeline

        data1 => data1,                     -- Operand register 1

        data2 => data2,                     -- Operand register 2

        -- Datas from EI stage

        EI_adr => EI_adr,                   -- Address of the instruction

        EI_instr => EI_instr,               -- The instruction to decode

        EI_it_ok => EI_it_ok,               -- Allow hardware interruptions

        -- Synchronous output to EX stage

        DI_bra => DI_bra,                   -- Branch decoded 

        DI_link => DI_link,                 -- A link for that instruction

        DI_op1 => DI_op1,                   -- operand 1 for alu

        DI_op2 => DI_op2,                   -- operand 2 for alu

        DI_code_ual => DI_code_ual,         -- Alu operation

        DI_offset => DI_offset,             -- Offset for the address calculation

        DI_adr_reg_dest => DI_adr_reg_dest, -- Address of the destination register of the result

        DI_ecr_reg => DI_ecr_reg,           -- Effective writing of the result

        DI_mode => DI_mode,                 -- Address mode (relative to pc or indexed to a register)

        DI_op_mem => DI_op_mem,             -- Memory operation request

        DI_r_w => DI_r_w,                   -- Type of memory operation (reading or writing)

        DI_adr => DI_adr,                   -- Address of the decoded instruction

        DI_exc_cause => DI_exc_cause,       -- Potential exception detected

        DI_level => DI_level,               -- Availability of the result for the data bypass

        DI_it_ok => DI_it_ok                -- Allow hardware interruptions

    );

    U4_ex : pps_ex port map (

        clock => clock,

        clock2 => clock2,

        reset => reset,

        stop_all => stop_all,

        stop_all2 => stop_all2,               -- Unconditionnal locking of outputs

        clear => interrupt,                 -- Clear the pipeline stage

        -- Datas from DI stage

        DI_bra => DI_bra,                   -- Branch instruction

        DI_link => DI_link,                 -- Branch with link

        DI_op1 => DI_op1,                   -- Operand 1 for alu

        DI_op2 => DI_op2,                   -- Operand 2 for alu

        DI_code_ual => DI_code_ual,         -- Alu operation

        DI_offset => DI_offset,             -- Offset for address calculation

        DI_adr_reg_dest => DI_adr_reg_dest, -- Destination register address for the result

        DI_ecr_reg => DI_ecr_reg,           -- Effective writing of the result

        DI_mode => DI_mode,                 -- Address mode (relative to pc ou index by a register)

        DI_op_mem => DI_op_mem,             -- Memory operation

        DI_r_w => DI_r_w,                   -- Type of memory operation (read or write)

        DI_adr => DI_adr,                   -- Instruction address

        DI_exc_cause => DI_exc_cause,       -- Potential cause exception

        DI_level => DI_level,               -- Availability stage of the result for bypassing

        DI_it_ok => DI_it_ok,               -- Allow hardware interruptions

                  EX2_data_hilo =>  ex2_data_hilo,    -- entrada p resultado do hilo p2  

             EX_data_hilo =>   ex_data_hilo,     -- saida p resultado do hilo p1                                                                                                     

        -- Synchronous outputs to MEM stage

        EX_adr => EX_adr,                   -- Instruction address

        EX_bra_confirm => EX_bra_confirm,   -- Branch execution confirmation

        EX_data_ual => EX_data_ual,         -- Ual result

        EX_adresse => EX_adresse,           -- Address calculation result

        EX_adresse_p1p2 => ex_adresse_p1p2_s, --resultado do calculo do endereco do desvio + 4 para pipe 2. 12-08-2018

        EX_adr_reg_dest => EX_adr_reg_dest, -- Destination register for the result

        EX_ecr_reg => EX_ecr_reg,           -- Effective writing of the result

        EX_op_mem => EX_op_mem,             -- Memory operation needed

        EX_r_w => EX_r_w,                   -- Type of memory operation (read or write)

        EX_exc_cause => EX_exc_cause,       -- Potential cause exception

        EX_level => EX_level,               -- Availability stage of result for bypassing

        EX_it_ok => EX_it_ok                -- Allow hardware interruptions

    );

    U5_mem : pps_mem port map (

        clock => clock,

             clock2 => clock2,

        reset => reset,

        stop_all => stop_all,               -- Unconditionnal locking of the outputs

             stop_all2 => stop_all2,

        clear => interrupt,                 -- Clear the pipeline stage

        -- Interface with the control bus

        MTC_data => MTC_data,               -- Data to write in memory

        MTC_adr => MTC_adr,                 -- Address for memory

        MTC_r_w => MTC_r_w,                 -- Read/Write in memory

        MTC_req => MTC_req,                 -- Request access to memory

        CTM_data => CTM_data,               -- Data from memory

        -- Datas from Execution stage

        EX_adr => EX_adr,                   -- Instruction address

        EX_data_ual => EX_data_ual,         -- Result of alu operation

        EX_adresse => EX_adresse,           -- Result of the calculation of the address

        EX_adresse_p1p2 => ex_adresse_p1p2_s, --resultado do calculo do endereco do desvio + 4 para pipe 2. 12-08-2018

             EX_bra_confirm => EX_bra_confirm,   -- Confirmacao do branch no pipe 1 (26-07-18)

        EX_adr_reg_dest => EX_adr_reg_dest, -- Destination register address for the result

        EX_ecr_reg => EX_ecr_reg,           -- Effective writing of the result

        EX_op_mem => EX_op_mem,             -- Memory operation needed

        EX_r_w => EX_r_w,                   -- Type of memory operation (read or write)

        EX_exc_cause => EX_exc_cause,       -- Potential exception cause

        EX_level => EX_level,               -- Availability stage for the result for bypassing

        EX_it_ok => EX_it_ok,               -- Allow hardware interruptions

        -- Synchronous outputs for bypass unit

        MEM_adr => MEM_adr,                 -- Instruction address

        MEM_adr_reg_dest=>MEM_adr_reg_dest, -- Destination register address

        MEM_ecr_reg => MEM_ecr_reg,         -- Writing of the destination register

        MEM_data_ecr => MEM_data_ecr,       -- Data to write (from alu or memory)

        MEM_exc_cause => MEM_exc_cause,     -- Potential exception cause

        MEM_level => MEM_level,             -- Availability stage for the result for bypassing

        MEM_it_ok => MEM_it_ok,             -- Allow hardware interruptions

             -- duplicacao

        -- Interface with the control bus

        MTC_data2 => MTC_data2,               -- Data to write in memory

        MTC_adr2 => MTC_adr2,                 -- Address for memory

        MTC_r_w2 => MTC_r_w2,                 -- Read/Write in memory

        MTC_req2 => MTC_req2,                 -- Request access to memory

        CTM_data2 => CTM_data2,               -- Data from memory

        -- Datas from Execution 2 stage

        EX_adr2 => EX_adr2,                   -- Instruction address

        EX_data_ual2 => EX_data_ual2,         -- Result of alu operation

        EX_adresse2 => EX_adresse2,           -- Result of the calculation of the address

        EX_adresse_p2p1 => ex_adresse_p2p1_s, --resultado do calculo do endereco do desvio + 4 para pipe 1. 12-08-2018

             EX_bra_confirm2 => EX_bra_confirm2,   -- Confirmacao do branch no pipe 2 (26-07-18)

        EX_adr_reg_dest2 => EX_adr_reg_dest2, -- Destination register address for the result

        EX_ecr_reg2 => EX_ecr_reg2,           -- Effective writing of the result

        EX_op_mem2 => EX_op_mem2,             -- Memory operation needed

        EX_r_w2 => EX_r_w2,                   -- Type of memory operation (read or write)

        EX_exc_cause2 => EX_exc_cause2,       -- Potential exception cause

        EX_level2 => EX_level2,               -- Availability stage for the result for bypassing

        EX_it_ok2 => EX_it_ok2,               -- Allow hardware interruptions

        -- Synchronous outputs for bypass unit

        MEM_adr2 => MEM_adr2,                 -- Instruction address

        MEM_adr_reg_dest2=>MEM_adr_reg_dest2, -- Destination register address

        MEM_ecr_reg2 => MEM_ecr_reg2,         -- Writing of the destination register

        MEM_data_ecr2 => MEM_data_ecr2,       -- Data to write (from alu or memory)

        MEM_exc_cause2 => MEM_exc_cause2,     -- Potential exception cause

        MEM_level2 => MEM_level2,             -- Availability stage for the result for bypassing

        MEM_it_ok2 => MEM_it_ok2             -- Allow hardware interruptions

    );

    U6_renvoi : renvoi port map (

        -- Register access signals

        adr1 => adr_reg1,                   -- Operand 1 address

        adr2 => adr_reg2,                   -- Operand 2 address

        use1 => use1,                       -- Operand 1 utilisation

        use2 => use2,                       -- Operand 2 utilisation

        data1 => data1,                     -- First register value

        data2 => data2,                     -- Second register value

        alea => alea,                       -- Unresolved hazards detected

        -- Bypass signals of the intermediary datas

        DI_level => DI_level,               -- Availability level of the data

        DI_adr => DI_adr_reg_dest,          -- Register destination of the result

        DI_ecr => DI_ecr_reg,               -- Writing register request

        DI_data => DI_op2,                  -- Data to used

        EX_level => EX_level,               -- Availability level of the data

        EX_adr => EX_adr_reg_dest,          -- Register destination of the result

        EX_ecr => EX_ecr_reg,               -- Writing register request

        EX_data => EX_data_ual,             -- Data to used

        MEM_level => MEM_level,             -- Availability level of the data

        MEM_adr => MEM_adr_reg_dest,        -- Register destination of the result

        MEM_ecr => MEM_ecr_reg,             -- Writing register request

        MEM_data => MEM_data_ecr,           -- Data to used

        interrupt => interrupt,             -- Exceptions or interruptions

        -- Connexion to the differents bank of register

          -- Writing commands for writing in the registers

        write_data => write_data,           -- Data to write

        write_adr => write_adr,             -- Address of the register to write

        write_GPR => write_GPR,             -- Selection in the internal registers

        write_SCP => write_SCP,             -- Selection in the coprocessor system registers

          -- Reading commands for Reading in the registers

        read_adr1 => read_adr1,             -- Address of the first register to read

        read_adr2 => read_adr2,             -- Address of the second register to read

        read_data1_GPR => read_data1_GPR,   -- Value of operand 1 from the internal registers

        read_data1_SCP => read_data1_SCP,   -- Value of operand 2 from the internal registers

        read_data2_GPR => read_data2_GPR,   -- Value of operand 1 from the coprocessor system registers

        read_data2_SCP => read_data2_SCP,    -- Value of operand 2 from the coprocessor system registers

             -- duplicacao

        -- Register access signals

        adr3 => adr_reg3,                   -- Operand 1 address

        adr4 => adr_reg4,                   -- Operand 2 address

        use12 => use3,                       -- Operand 1 utilisation

        use22 => use4,                       -- Operand 2 utilisation

        data3 => data3,                     -- First register value

        data4 => data4,                     -- Second register value

        alea2 => alea2,                       -- Unresolved hazards detected

        -- Bypass signals of the intermediary datas

        DI_level2 => DI_level2,               -- Availability level of the data

        DI_adr2 => DI_adr_reg_dest2,          -- Register destination of the result

        DI_ecr2 => DI_ecr_reg2,               -- Writing register request

        DI_data2 => DI_op4,                  -- Data to used

        EX_level2 => EX_level2,               -- Availability level of the data

        EX_adr2 => EX_adr_reg_dest2,          -- Register destination of the result

        EX_ecr2 => EX_ecr_reg2,               -- Writing register request

        EX_data2 => EX_data_ual2,             -- Data to used

        MEM_level2 => MEM_level2,             -- Availability level of the data

        MEM_adr2 => MEM_adr_reg_dest2,        -- Register destination of the result

        MEM_ecr2 => MEM_ecr_reg2,             -- Writing register request

        MEM_data2 => MEM_data_ecr2,           -- Data to used                                                                                      

        -- Connexion to the differents bank of register

          -- Writing commands for writing in the registers

        write_data2 => write_data2,           -- Data to write

        write_adr2 => write_adr2,             -- Address of the register to write

        write_GPR2 => write_GPR2,             -- Selection in the internal registers

        --write_SCP2 => write_SCP,             -- Selection in the coprocessor system registers

          -- Reading commands for Reading in the registers

        read_adr3 => read_adr3,             -- Address of the first register to read

        read_adr4 => read_adr4,             -- Address of the second register to read

        read_data3_GPR => read_data3_GPR,   -- Value of operand 1 from the internal registers

        read_data3_SCP => read_data3_SCP,   -- Value of operand 2 from the internal registers

        read_data4_GPR => read_data4_GPR,   -- Value of operand 1 from the coprocessor system registers

        read_data4_SCP => read_data4_SCP    -- Value of operand 2 from the coprocessor system registers

    );

    U7_banc : banc port map(

        clock => clock,

             clock2 => clock2,

        reset => reset,

        -- Register addresses to read

        reg_src1 => read_adr1,

        reg_src2 => read_adr2,

        -- Register address to write and its data

        reg_dest => write_adr,

        donnee   => write_data,

        -- Write signal

        cmd_ecr  => write_GPR,

        -- Bank outputs

        data_src1 => read_data1_GPR,

        data_src2 => read_data2_GPR,

        -- Register addresses to read

        reg_src3 => read_adr3,

        reg_src4 => read_adr4,

        -- Register address to write and its data

        reg_dest2 => write_adr2,

        donnee2   => write_data2,

        -- Write signal

        cmd_ecr2  => write_GPR2,

        -- Bank outputs

        data_src3 => read_data3_GPR,

        data_src4 => read_data4_GPR

    );

    U8_syscop : syscop port map (

        clock         => clock,

        reset         => reset,

        -- Datas from the pipeline

        MEM_adr       => MEM_adr,           -- Address (PC) of the current instruction in the pipeline end -> responsible of the exception

        MEM_exc_cause => MEM_exc_cause,     -- Potential cause exception of that instruction

        MEM_it_ok     => MEM_it_ok,         -- Allow hardware interruptions

        -- Hardware interruption

        it_mat        => it_mat_clk,        -- Hardware interruption detected

        -- Interruption controls

        interrupt     => interrupt,         -- Interruption to take into account

        vecteur_it    => vecteur_it,        -- Interruption vector

        -- Writing request in register bank

        write_data    => write_data,        -- Data to write

        write_adr     => write_adr,         -- Address of the register to write

        write_SCP     => write_SCP,         -- Writing request

        -- Reading request in register bank

        read_adr1     => read_adr1,         -- Address of the first register

        read_adr2     => read_adr2,         -- Address of the second register

        read_data1    => read_data1_SCP,    -- Value of register 1

        read_data2    => read_data2_SCP,     -- Value of register 2

        --mod

             MEM_adr2       => MEM_adr2,

             MEM_exc_cause2 => MEM_exc_cause2,

             MEM_it_ok2     => MEM_it_ok2,

             write_data2    => write_data2,

             write_adr2     => write_adr2,

             write_SCP2     => zero,

             read_adr3     => read_adr3,

             read_adr4     => read_adr4,

                  read_data3    => read_data3_SCP,

             read_data4    => read_data4_SCP

    );

    U9_bus_ctrl01 : bus_ctrl01 port map (

        clock          => clock,

        reset          => reset,

        -- Interruption in the pipeline

        interrupt      => interrupt,

        -- Interface for the Instruction Extraction Stage

        adr_from_ei    => ETC_adr,          -- The address of the data to read

        instr_to_ei    => CTE_instr,        -- Instruction from the memory                                                      

        -- Interface with the MEMory Stage

        req_from_mem   => MTC_req,          -- Request to access the ram

        r_w_from_mem   => MTC_r_w,          -- Read/Write request

        adr_from_mem   => MTC_adr,          -- Address in ram

        data_from_mem  => MTC_data,         -- Data to write in ram

        data_to_mem    => CTM_data,         -- Data from the ram to the MEMory stage      

        -- RAM interface signals

        req_to_ram     => ram_req,          -- Request to ram

        adr_to_ram     => ram_adr,          -- Address of the data to read or write

        r_w_to_ram     => ram_r_w,          -- Read/Write request

        ack_from_ram   => ram_ack,          -- Acknowledge from the memory

        data_inout_ram => ram_data,         -- Data from/to the memory

        -- Pipeline progress control signal

        stop_all       => stop_all

    );

    U10_ei_2 :  pps_ei_2 port map (

             clock => clock2,

        reset => reset,

        clear => interrupt,         -- Clear the pipeline stage                      

        stop_all2 => stop_all2,       -- Evolution locking signal                      

        -- Asynchronous inputs

        stop_ei => alea2EI2,            -- Lock the EI_adr and Ei_instr registers        

        genop => genop2,             -- Send nops                                     

        -- interface Controler - EI

        CTE_instr => CTE_instr2,     -- Instruction from the memory                   

        ETC_adr => ETC_adr2,         -- Address to read in memory (ja feito pelo EI)                     

        -- Synchronous inputs from PF stage

        PF_pc => PF_pc_4,             -- Current value of the pc + 4                     

        -- Synchronous outputs to DI stage

        EI_instr => EI_instr2,       -- Read interface                                

        EI_adr => EI_adr2,           -- Address from the read instruction             

        EI_it_ok => EI_it_ok2        -- Allow hardware interruptions

    );

    U11_di2 : pps_di_2 port map (

        clock => clock2,

        reset => reset,

        stop_all2 => stop_all2,               -- Unconditionnal locking of the outputs

        clear => interrupt,                 -- Clear the pipeline stage (nop in the outputs)

        -- Asynchronous outputs

        bra_detect => bra_detect2,           -- Branch detection in the current instruction