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

--  This file is a part of the LEON VHDL model

--  Copyright (C) 1999  European Space Agency (ESA)

--

--  This library is free software; you can redistribute it and/or

--  modify it under the terms of the GNU Lesser General Public

--  License as published by the Free Software Foundation; either

--  version 2 of the License, or (at your option) any later version.

--

--  See the file COPYING.LGPL for the full details of the license.

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

-- Entity:      cache

-- File:        cache.vhd

-- Author:      Jiri Gaisler - ESA/ESTEC

-- Description: Complete cache sub-system with controllers and rams

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

-- Version control:

-- 17-02-1999:  First implemetation

-- 26-09-1999:  Release 1.0

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

library IEEE;

use IEEE.std_logic_1164.all;

use work.leon_config.all;

use work.amba.all;

use work.leon_iface.all;

entity cache is

  port (

    rst   : in  std_logic;

    clk   : in  clk_type;

    ici   : in  icache_in_type;

    ico   : out icache_out_type;

    dci   : in  dcache_in_type;

    dco   : out dcache_out_type;

    iuo   : in  iu_out_type;

    apbi  : in  apb_slv_in_type;

    apbo  : out apb_slv_out_type;

    ahbi  : in  ahb_mst_in_type;

    ahbo  : out ahb_mst_out_type;

    ahbsi : in  ahb_slv_in_type;

    crami : out cram_in_type;

    cramo : in  cram_out_type;

    fpuholdn : in  std_logic

  );

end;

architecture rtl of cache is

component acache

  port (

    rst    : in  std_logic;

    clk    : in  clk_type;

    mcii   : in  memory_ic_in_type;

    mcio   : out memory_ic_out_type;

    mcdi   : in  memory_dc_in_type;

    mcdo   : out memory_dc_out_type;

    iuo    : in  iu_out_type;

    apbi   : in  apb_slv_in_type;

    apbo   : out apb_slv_out_type;

    ahbi   : in  ahb_mst_in_type;

    ahbo   : out ahb_mst_out_type

  );

end component;

component dcache

  port (

    rst    : in  std_logic;

    clk    : in  clk_type;

    dci    : in  dcache_in_type;

    dco    : out dcache_out_type;

    ico    : in  icache_out_type;

    mcdi   : out memory_dc_in_type;

    mcdo   : in  memory_dc_out_type;

    ahbsi : in  ahb_slv_in_type;

    dcrami : out dcram_in_type;

    dcramo : in  dcram_out_type;

    fpuholdn : in  std_logic

);

end component;

component icache

  port (

    rst    : in  std_logic;

    clk    : in  clk_type;

    ici    : in  icache_in_type;

    ico    : out icache_out_type;

    dci    : in  dcache_in_type;

    dco    : in  dcache_out_type;

    mcii   : out memory_ic_in_type;

    mcio   : in  memory_ic_out_type;

    icrami : out icram_in_type;

    icramo : in  icram_out_type;

    fpuholdn : in  std_logic

);

end component;

signal icol  : icache_out_type;

signal dcol  : dcache_out_type;

signal mcii : memory_ic_in_type;

signal mcio : memory_ic_out_type;

signal mcdi : memory_dc_in_type;

signal mcdo : memory_dc_out_type;

begin

-- instruction cache controller

  icache0 : icache port map ( rst, clk, ici, icol, dci, dcol, mcii, mcio,

                              crami.icramin, cramo.icramout, fpuholdn);

-- data cache controller

  dcache0 : dcache port map ( rst, clk, dci, dcol, icol, mcdi, mcdo, ahbsi,

                              crami.dcramin, cramo.dcramout, fpuholdn);

-- AMBA AHB interface

  a0 : acache port map (rst, clk, mcii, mcio, mcdi, mcdo, iuo, apbi, apbo,

                        ahbi, ahbo);

  ico <= icol;

  dco <= dcol;

end ;