AXI-HS-MUX/template/AXI_HS_MUX_n.vhd.j2

{% set addr_width = (num_ports - 1).bit_length() %}
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use ieee.math_real.all;

entity AXI_HS_MUX_{{ num_ports }} is
    generic (
        G_DataWidth : integer := 8;
        G_AddressWidth : integer := {{ addr_width }};
        G_InBufferStages : integer := 1;
        G_OutBufferStages : integer := 1
    );
    port (
        --@ Clock signal; (**Rising edge** triggered)
        I_CLK : in std_logic;
        --@ Clock enable signal (**Active high**)
        I_CE : in std_logic;
        --@ Synchronous reset signal (**Active high**)
        I_RST : in std_logic;

        --@ @virtualbus Input @dir in Input Interface
        I_PIn_Valid : in std_logic := '0';
        O_PIn_Ready : out std_logic := '0';
        I_PIn_Data : in std_logic_vector(G_DataWidth - 1 downto 0) := (others => '0');
        I_PIn_Address : in std_logic_vector(G_AddressWidth - 1 downto 0) := (others => '0');
        --@ @end

        {% for i in range(num_ports) %}
        --@ @virtualbus P{{ i }} @dir out P{{ i }} interface
        O_P{{ i }}_Valid : out std_logic := '0';
        I_P{{ i }}_Ready : in std_logic := '0';
        O_P{{ i }}_Data : out std_logic_vector(G_DataWidth - 1 downto 0) := (others => '0'){% if not loop.last %};{% endif %}
        --@ @end
        {% endfor %}
    );
end entity AXI_HS_MUX_{{ num_ports }};

architecture Rtl of AXI_HS_MUX_{{ num_ports }} is
    signal S_PIn_BufferEnable : std_logic := '0';

    signal S_PIn_Valid : std_logic := '0';
    signal S_PIn_Ready : std_logic := '0';

    signal R_PIn_Data : std_logic_vector(G_DataWidth - 1 downto 0) := (others => '0');
    signal R_PIn_Address : std_logic_vector(G_AddressWidth - 1 downto 0) := (others => '0');

    {% for i in range(num_ports) %}
    signal S_P{{ i }}_BufferEnable : std_logic := '0';
    signal S_P{{ i }}_Valid : std_logic := '0';
    signal S_P{{ i }}_Ready : std_logic := '0';
    signal S_P{{ i }}_Data : std_logic_vector(G_DataWidth - 1 downto 0) := (others => '0');
    {% endfor %}

begin

    I_InBufferCtrl : entity work.PipelineController
        generic map(
            G_PipelineStages => G_InBufferStages
        )
        port map(
            I_CLK => I_CLK,
            I_CE => I_CE,
            I_RST => I_RST,
            O_Enable => S_PIn_BufferEnable,
            I_Valid => I_PIn_Valid,
            O_Ready => O_PIn_Ready,
            O_Valid => S_PIn_Valid,
            I_Ready => S_PIn_Ready
        );

    I_InBufferData : entity work.PipelineRegister
        generic map(
            G_PipelineStages => G_InBufferStages,
            G_Width => G_DataWidth,
            G_RegisterBalancing => "forward"
        )
        port map(
            I_CLK => I_CLK,
            I_Enable => S_PIn_BufferEnable,
            I_Data => I_PIn_Data,
            O_Data => R_PIn_Data
        );

    I_InBufferAddress : entity work.PipelineRegister
        generic map(
            G_PipelineStages => G_InBufferStages,
            G_Width => G_AddressWidth,
            G_RegisterBalancing => "forward"
        )
        port map(
            I_CLK => I_CLK,
            I_Enable => S_PIn_BufferEnable,
            I_Data => I_PIn_Address,
            O_Data => R_PIn_Address
        );

    P_MUX : process (S_PIn_Valid, R_PIn_Address, R_PIn_Data
        {%- for i in range(num_ports) %}, S_P{{ i }}_Ready{% endfor %})
    begin
        S_PIn_Ready <= '0';
        {% for i in range(num_ports) %}
        S_P{{ i }}_Valid <= '0';
        S_P{{ i }}_Data <= (others => '-');
        {% endfor %}

        case to_integer(unsigned(R_PIn_Address)) is
                {% for i in range(num_ports) %}
            when {{ i }} =>
                S_P{{ i }}_Valid <= S_PIn_Valid;
                S_PIn_Ready <= S_P{{ i }}_Ready;
                S_P{{ i }}_Data <= R_PIn_Data;
                {% endfor %}
            when others =>
                null;
        end case;
    end process P_MUX;

    {% for i in range(num_ports) %}
    I_P{{ i }}_BufferCtrl : entity work.PipelineController
    generic map(
        G_PipelineStages => G_OutBufferStages
    )
    port map(
        I_CLK => I_CLK,
        I_CE => I_CE,
        I_RST => I_RST,
        O_Enable => S_P{{ i }}_BufferEnable,
        I_Valid => S_P{{ i }}_Valid,
        O_Ready => S_P{{ i }}_Ready,
        O_Valid => O_P{{ i }}_Valid,
        I_Ready => I_P{{ i }}_Ready
    );

    I_P{{ i }}_BufferData : entity work.PipelineRegister
    generic map(
        G_PipelineStages => G_OutBufferStages,
        G_Width => G_DataWidth,
        G_RegisterBalancing => "backward"
    )
    port map(
        I_CLK => I_CLK,
        I_Enable => S_P{{ i }}_BufferEnable,
        I_Data => S_P{{ i }}_Data,
        O_Data => O_P{{ i }}_Data
    );

    {% endfor %}
end architecture;