library IEEE;
use IEEE.std_logic_1164.all;
library gan_ganimede;
use gan_ganimede.io_types.all;
library gan_socbridge;
use gan_socbridge.socbridge_driver_pkg.all;
library gan_controller;
library gan_manager;
use gan_manager.management_types.all;
library gan_buffer;

entity ganimede_toplevel is
  port (
    clk               : in  std_logic;
    rst               : in  std_logic;
    ext_to_ganimede   : in  ext_to_ganimede_t;
    ganimede_to_ext   : out ganimede_to_ext_t;
    ip_to_ganimede    : in  ip_to_ganimede_t;
    ganimede_to_ip    : out ganimede_to_ip_t
  );
end entity ganimede_toplevel;
architecture rtl of ganimede_toplevel is
  --- SIGNAL DECLERATIONS ---
  signal drivers_to_controller : drivers_to_controller_t;
  signal controller_to_drivers : controller_to_drivers_t;
  signal manager_to_controller   : manager_to_controller_t;
  signal controller_to_manager   : controller_to_manager_t;
  signal socbridge_driver_to_manager : socbridge_driver_to_manager_t;
  signal manager_to_socbridge_driver : manager_to_socbridge_driver_t;
  signal socbridge_driver_to_buffer : fifo_interface_t;
  signal buffer_to_socbridge_driver : fifo_interface_t;
  signal socbridge_clk : std_logic;
  signal used_slots : integer;

  --signal gan_socbridge_WE_in : std_logic;
  --signal gan_socbridge_WE_out : std_logic;
  --signal gan_socbridge_is_full_in : std_logic;
  --signal gan_socbridge_is_full_out : std_logic;
  
begin
  --- CONNECT EXTERNAL SIGNALS TO INTERNAL CONNECTIONS ---

  --- DRIVER INSTANTIATION ---
  socbridge_driver_inst: entity gan_socbridge.socbridge_driver
    port map(
      clk                            => clk,
      socbridge_clk                  => socbridge_clk,
      rst                            => rst,
      controller_to_socbridge_driver => controller_to_drivers.socbridge,
      socbridge_driver_to_controller => drivers_to_controller.socbridge,
      manager_to_socbridge_driver    => manager_to_socbridge_driver,
      socbridge_driver_to_manager    => socbridge_driver_to_manager,
      ext_to_socbridge_driver        => ext_to_ganimede.socbridge,
      socbridge_driver_to_ext        => ganimede_to_ext.socbridge,
      ip_to_socbridge_driver         => buffer_to_socbridge_driver,
      socbridge_driver_to_ip         => socbridge_driver_to_buffer,
      used_slots => used_slots
    );

  controller_inst: entity gan_controller.control_unit
    port map(
      clk                            => clk,
      rst                            => rst,
      manager_to_controller          => manager_to_controller,
      controller_to_manager          => controller_to_manager,
      drivers_to_controller          => drivers_to_controller,
      controller_to_drivers          => controller_to_drivers
    );
  
  manager_inst: entity gan_manager.management_unit
    port map(
      clk                            => clk,
      rst                            => rst,
      manager_to_controller          => manager_to_controller,
      controller_to_manager          => controller_to_manager,
      manager_to_socbridge_driver    => manager_to_socbridge_driver,
      socbridge_driver_to_manager    => socbridge_driver_to_manager
    );

  fifo_buffer_to_ip_inst : entity gan_buffer.fifo_buffer
    generic map (
      buffer_size => 2*1024
    )
    port map(
      in_clk => socbridge_clk,
      out_clk => clk,
      rst => rst,
      ready_in => ip_to_ganimede.socbridge.ready,
      ready_out => buffer_to_socbridge_driver.ready,
      valid_in => socbridge_driver_to_buffer.valid,
      valid_out => ganimede_to_ip.socbridge.valid,
      data_in => socbridge_driver_to_buffer.data,
      data_out => ganimede_to_ip.socbridge.data
    );

  fifo_buffer_from_ip_inst : entity gan_buffer.fifo_buffer
    generic map (
      buffer_size => 2*1024
    )
    port map(
      in_clk => clk, 
      out_clk => socbridge_clk,
      rst => rst,
      ready_in => socbridge_driver_to_buffer.ready,
      ready_out => ganimede_to_ip.socbridge.ready,
      valid_in => ip_to_ganimede.socbridge.valid,
      valid_out => buffer_to_socbridge_driver.valid,
      data_in => ip_to_ganimede.socbridge.data,
      data_out => buffer_to_socbridge_driver.data,
      used_slots => used_slots
    );
    
  --- LATER WE ADD OPTIMIZATIONS HERE ---


end architecture rtl;