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-- $Id: simbus.vhd 805 2016-09-03 08:09:52Z mueller $

--

-- Copyright 2007-2016 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>

--

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

-- the terms of the GNU General Public License as published by the Free

-- Software Foundation, either version 2, 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 complete details.

--

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

-- Package Name:   simbus

-- Description:    Global signals for support control in test benches

--

-- Dependencies:   -

-- Tool versions:  xst 8.2-14.7; viv 2016.2; ghdl 0.18-0.33

-- Revision History: 

-- Date         Rev Version  Comment

-- 2016-09-02   805   2.1    rename SB_CLKSTOP > SB_SIMSTOP; init with 'L'

-- 2011-12-23   444   2.0    remove global clock cycle signal SB_CLKCYCLE

-- 2010-04-24   282   1.1    add SB_(VAL|ADDR|DATA)

-- 2008-03-24   129   1.0.1  use 31 bits for SB_CLKCYCLE

-- 2007-08-27    76   1.0    Initial version 

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

library ieee;

use ieee.std_logic_1164.all;

use work.slvtypes.all;

package simbus is

  signal SB_SIMSTOP : slbit := 'L';             -- global simulation stop

  signal SB_CNTL : slv16 := (others=>'L');      -- global signals tb -> uut

  signal SB_STAT : slv16 := (others=>'0');      -- global signals uut -> tb

  signal SB_VAL : slbit := 'L';                 -- init bcast valid

  signal SB_ADDR : slv8 := (others=>'L');       -- init bcast address

  signal SB_DATA : slv16 := (others=>'L');      -- init bcast data

  -- Note: SB_SIMSTOP, SB_CNTL, SB_VAL, SB_ADDR, SB_DATA can have weak

  --       ('L','H') and strong ('0','1') drivers. Therefore always remove

  --       strenght before using, e.g. with to_x01()

end package simbus;