global_logic.vhd

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-- 

--
--  GLOBAL_LOGIC
--
--
--
--  Description: The GLOBAL_LOGIC module handles channel bonding, channel
--               verification, channel error manangement and idle generation.
--
--               This module supports 1 2-byte lane designs
--

library IEEE;
use IEEE.STD_LOGIC_1164.all;

entity GLOBAL_LOGIC is
port(
    -- GTP Interface
    EN_CHAN_SYNC        : out std_logic;
    -- Aurora Lane Interface
    LANE_UP             : in std_logic;
    SOFT_ERR            : in std_logic;
    HARD_ERR            : in std_logic;    
    GOT_V               : in std_logic;
    GEN_A               : out std_logic;
    GEN_K               : out std_logic_vector(0 to 1);
    GEN_R               : out std_logic_vector(0 to 1);
    GEN_V               : out std_logic_vector(0 to 1);
    RESET_LANES         : out std_logic;
    -- System Interface
    USER_CLK            : in std_logic;
    RESET               : in std_logic;
    POWER_DOWN          : in std_logic;
    CHANNEL_UP          : out std_logic;
    START_RX            : out std_logic;
    CHANNEL_SOFT_ERR    : out std_logic;
    CHANNEL_HARD_ERR    : out std_logic);
end GLOBAL_LOGIC;

architecture MAPPED of GLOBAL_LOGIC is

-- External Register Declarations --

    signal EN_CHAN_SYNC_Buffer       : std_logic;
    signal GEN_A_Buffer              : std_logic;
    signal GEN_K_Buffer              : std_logic_vector(0 to 1);
    signal GEN_R_Buffer              : std_logic_vector(0 to 1);
    signal GEN_V_Buffer              : std_logic_vector(0 to 1);
    signal RESET_LANES_Buffer        : std_logic;
    signal CHANNEL_UP_Buffer         : std_logic;
    signal START_RX_Buffer           : std_logic;
    signal CHANNEL_SOFT_ERR_Buffer : std_logic;
    signal CHANNEL_HARD_ERR_Buffer : std_logic;

-- Wire Declarations --

    signal gen_ver_i       : std_logic;
    signal reset_channel_i : std_logic;
    signal did_ver_i       : std_logic;

-- Component Declarations --

    component CHANNEL_INIT_SM

        port (

        -- GTP Interface
                
                EN_CHAN_SYNC      : out std_logic;

        -- Aurora Lane Interface
        
                GOT_V             : in std_logic;
                RESET_LANES       : out std_logic;

        -- System Interface

                USER_CLK          : in std_logic;
                RESET             : in std_logic;
                CHANNEL_UP        : out std_logic;
                START_RX          : out std_logic;

        -- Idle and Verification Sequence Generator Interface

                DID_VER           : in std_logic;
                GEN_VER           : out std_logic;

        -- Channel Init State Machine Interface

                RESET_CHANNEL     : in std_logic

             );

    end component;


    component IDLE_AND_VER_GEN

        port (

        -- Channel Init SM Interface

                GEN_VER  : in std_logic;
                DID_VER  : out std_logic;

        -- Aurora Lane Interface

                GEN_A    : out std_logic;
                GEN_K    : out std_logic_vector(0 to 1);
                GEN_R    : out std_logic_vector(0 to 1);
                GEN_V    : out std_logic_vector(0 to 1);

        -- System Interface

                RESET    : in std_logic;
                USER_CLK : in std_logic

             );

    end component;


    component CHANNEL_ERR_DETECT

        port (

        -- Aurora Lane Interface

                SOFT_ERR         : in std_logic;
                HARD_ERR         : in std_logic;
                LANE_UP            : in std_logic;

        -- System Interface

                USER_CLK           : in std_logic;
                POWER_DOWN         : in std_logic;

                CHANNEL_SOFT_ERR : out std_logic;
                CHANNEL_HARD_ERR : out std_logic;

        -- Channel Init SM Interface

                RESET_CHANNEL      : out std_logic

             );

    end component;

begin

    EN_CHAN_SYNC       <= EN_CHAN_SYNC_Buffer;
    GEN_A              <= GEN_A_Buffer;
    GEN_K              <= GEN_K_Buffer;
    GEN_R              <= GEN_R_Buffer;
    GEN_V              <= GEN_V_Buffer;
    RESET_LANES        <= RESET_LANES_Buffer;
    CHANNEL_UP         <= CHANNEL_UP_Buffer;
    START_RX           <= START_RX_Buffer;
    CHANNEL_SOFT_ERR <= CHANNEL_SOFT_ERR_Buffer;
    CHANNEL_HARD_ERR <= CHANNEL_HARD_ERR_Buffer;

-- Main Body of Code --

    -- State Machine for channel bonding and verification.

    channel_init_sm_i : CHANNEL_INIT_SM

        port map (

        -- GTP Interface                    
                    EN_CHAN_SYNC => EN_CHAN_SYNC_Buffer,

        -- Aurora Lane Interface
                    GOT_V => GOT_V,
                    RESET_LANES => RESET_LANES_Buffer,

        -- System Interface

                    USER_CLK => USER_CLK,
                    RESET => RESET,
                    START_RX => START_RX_Buffer,
                    CHANNEL_UP => CHANNEL_UP_Buffer,

        -- Idle and Verification Sequence Generator Interface

                    DID_VER => did_ver_i,
                    GEN_VER => gen_ver_i,

        -- Channel Error Management Module Interface

                    RESET_CHANNEL => reset_channel_i

                 );


    -- Idle and verification sequence generator module.

    idle_and_ver_gen_i : IDLE_AND_VER_GEN

        port map (

        -- Channel Init SM Interface

                    GEN_VER => gen_ver_i,
                    DID_VER => did_ver_i,

        -- Aurora Lane Interface

                    GEN_A => GEN_A_Buffer,
                    GEN_K => GEN_K_Buffer,
                    GEN_R => GEN_R_Buffer,
                    GEN_V => GEN_V_Buffer,

        -- System Interface

                    RESET => RESET,
                    USER_CLK => USER_CLK

                 );



    -- Channel Error Management module.

    channel_err_detect_i : CHANNEL_ERR_DETECT

        port map (

        -- Aurora Lane Interface

                    SOFT_ERR => SOFT_ERR,
                    HARD_ERR => HARD_ERR,
                    LANE_UP => LANE_UP,

        -- System Interface

                    USER_CLK => USER_CLK,
                    POWER_DOWN => POWER_DOWN,
                    CHANNEL_SOFT_ERR => CHANNEL_SOFT_ERR_Buffer,
                    CHANNEL_HARD_ERR => CHANNEL_HARD_ERR_Buffer,

        -- Channel Init State Machine Interface

                    RESET_CHANNEL => reset_channel_i

                 );

end MAPPED;