Subversion Repositories mips_enhanced

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

--  This file is a part of the GRLIB VHDL IP LIBRARY

--  Copyright (C) 2003, Gaisler Research

--

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

--  it under the terms of the GNU General Public License as published by

--  the Free Software Foundation; either version 2 of the License, or

--  (at your option) any later version.

--

--  This program is distributed in the hope that it will be useful,

--  but WITHOUT ANY WARRANTY; without even the implied warranty of

--  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

--  GNU General Public License for more details.

--

--  You should have received a copy of the GNU General Public License

--  along with this program; if not, write to the Free Software

--  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 

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

-- pragma translate_off

library ieee;

use ieee.std_logic_1164.all;

library grlib;

use grlib.amba.all;

library gaisler;

use gaisler.ambatest.all;

package ahb_tb is

procedure AHB_read_single(ctrl : inout ctrl_type; signal tbi : out tb_in_type; signal tbo : in tb_out_type; dbglevel : in integer);

procedure AHB_read_burst(ctrl : inout ctrl_type; signal tbi : out tb_in_type; signal tbo : in tb_out_type; dbglevel : in integer);

procedure AHB_write_single(ctrl : inout ctrl_type; signal tbi : out tb_in_type; signal tbo : in tb_out_type; dbglevel : in integer);

procedure AHB_write_burst(ctrl : inout ctrl_type; signal tbi : out tb_in_type; signal tbo : in tb_out_type; dbglevel : in integer);

end ahb_tb;

package body ahb_tb is

constant printlevel : integer := 2;

function string_inv(instring : string(18 downto 1)) return string is

  variable vstr : string(1 to 18);

  begin

    vstr(1 to 18) := instring(18 downto 1);

    return(vstr);

end string_inv;

procedure AHB_read_single(

  ctrl   : inout ctrl_type;

  signal tbi  : out tb_in_type;

  signal tbo  : in tb_out_type;

  dbglevel : in integer) is

  begin

  if tbo.ready = '1' then wait until tbo.ready = '0'; end if;

  tbi.address <= ctrl.address;

  tbi.command <= RD_SINGLE;

  tbi.no_words <= 1;

  tbi.userfile <= ctrl.userfile;

  tbi.rfile <= ctrl.rfile;

  if dbglevel >= printlevel then

    if ctrl.userfile then

      printf("AHBMST TB: AHB Read from file %s",string_inv(ctrl.rfile));

    else

      printf("AHBMST TB: AHB Read from address %x",ctrl.address);

    end if;

  end if;

  tbi.usewfile <= ctrl.usewfile;

  tbi.wfile <= ctrl.wfile;

  tbi.start <= '1';

  wait until tbo.ready = '1';

  ctrl.data := tbo.data;

  ctrl.status := tbo.status;

  if ctrl.status = ERR then

    printf("AHBMST TB: #ERROR# Read access failed at %x",ctrl.address);

  elsif ctrl.status = TIMEOUT then

    printf("AHBMST TB: #ERROR# Timeout received for read access at %x",ctrl.address);

  elsif ctrl.status = OK then

    if dbglevel >= printlevel then

      printf("AHBMST TB: Returned data: %x",ctrl.data);

    end if;

  end if;

  tbi.start <= '0';

end procedure;

procedure AHB_read_burst(

  ctrl   : inout ctrl_type;

  signal tbi  : out tb_in_type;

  signal tbo  : in tb_out_type;

  dbglevel : in integer) is

  variable i : integer;

  begin

  if tbo.ready = '1' then wait until tbo.ready = '0'; end if;

  tbi.address <= ctrl.address;

  tbi.command <= RD_INCR;

  tbi.no_words <= ctrl.no_words;

  tbi.userfile <= ctrl.userfile;

  tbi.rfile <= ctrl.rfile;

  if dbglevel >= printlevel then

    if ctrl.userfile then

      printf("AHBMST TB: AHB Read burst from file %s",string_inv(ctrl.rfile));

    else

      printf("AHBMST TB: AHB Read burst from address %x",ctrl.address);

    end if;

  end if;

  tbi.usewfile <= ctrl.usewfile;

  tbi.wfile <= ctrl.wfile;

  tbi.start <= '1';

  wait until tbo.ready = '1';

  ctrl.data := tbo.data;

  ctrl.status := tbo.status;

  if ctrl.status = ERR then

    printf("AHBMST TB: #ERROR# Read access failed at %x",ctrl.address);

  elsif ctrl.status = TIMEOUT then

    printf("AHBMST TB: #ERROR# Timeout received for read access at %x",ctrl.address);

  elsif ctrl.status = OK then

    if dbglevel >= printlevel then

      printf("AHBMST TB: Returned data: %x",ctrl.data);

    end if;

  end if;

  ctrl.status := tbo.status;

  tbi.start <= '0';

end procedure;

procedure AHB_write_single(

  ctrl   : inout ctrl_type;

  signal tbi  : out tb_in_type;

  signal tbo  : in tb_out_type;

  dbglevel : in integer) is

  begin

  if tbo.ready = '1' then wait until tbo.ready = '0'; end if;

  tbi.address <= ctrl.address;

  tbi.data <= ctrl.data;

  tbi.command <= WR_SINGLE;

  tbi.no_words <= 1;

  tbi.userfile <= ctrl.userfile;

  tbi.rfile <= ctrl.rfile;

  if dbglevel >= printlevel then

    if ctrl.userfile then

      printf("AHBMST TB: AHB Write from file %s",string_inv(ctrl.rfile));

    else

      printf("AHBMST TB: AHB Write to address %x",ctrl.address);

    end if;

  end if;

  tbi.usewfile <= false; -- No log file for write accesses

  tbi.wfile <= ctrl.wfile;

  tbi.start <= '1';

  wait until tbo.ready = '1';

  ctrl.status := tbo.status;

  if ctrl.status = ERR then

    printf("AHBMST TB: #ERROR# Write access failed at %x",ctrl.address);

  elsif ctrl.status = TIMEOUT then

    printf("AHBMST TB: #ERROR# Timeout received for write access at %x",ctrl.address);

  elsif ctrl.status = OK then

    if dbglevel >= printlevel then

      printf("AHBMST TB: Write success!");

    end if;

  end if;

  tbi.start <= '0';

end procedure;

procedure AHB_write_burst(

  ctrl   : inout ctrl_type;

  signal tbi  : out tb_in_type;

  signal tbo  : in tb_out_type;

  dbglevel : in integer) is

  begin

  if tbo.ready = '1' then wait until tbo.ready = '0'; end if;

  tbi.address <= ctrl.address;

  tbi.data <= ctrl.data;

  tbi.command <= WR_INCR;

  tbi.no_words <= ctrl.no_words;

  tbi.userfile <= ctrl.userfile;

  tbi.rfile <= ctrl.rfile;

  if dbglevel >= printlevel then

    if ctrl.userfile then

      printf("AHBMST TB: AHB Write from file %s",string_inv(ctrl.rfile));

    else

      printf("AHBMST TB: AHB Write burst to address %x",ctrl.address);

    end if;

  end if;

  tbi.usewfile <= false; -- No log file for write accesses

  tbi.wfile <= ctrl.wfile;

  tbi.start <= '1';

  wait until tbo.ready = '1';

  ctrl.status := tbo.status;

  if ctrl.status = ERR then

    printf("AHBMST TB: #ERROR# Write access failed at %x",ctrl.address);

  elsif ctrl.status = TIMEOUT then

    printf("AHBMST TB: #ERROR# Timeout received for write access at %x",ctrl.address);

  elsif ctrl.status = OK then

    if dbglevel >= printlevel then

      printf("AHBMST TB: Write success!");

    end if;

  end if;

  tbi.start <= '0';

end procedure;

end package body;

-- pragma translate_on