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-- $Id: sys_conf.vhd 314 2010-07-09 17:38:41Z mueller $

--

-- Copyright 2007-2008 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:   sys_conf

-- Description:    Definitions for sys_w11a_s3 (for synthesis)

--

-- Dependencies:   -

-- Tool versions:  xst 8.1, 8.2, 9.1, 9.2; ghdl 0.18-0.25

-- Revision History: 

-- Date         Rev Version  Comment

-- 2010-05-05   288   1.1.1  add sys_conf_hio_debounce

-- 2008-02-23   118   1.1    add memory config

-- 2007-09-23    84   1.0    Initial version 

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

library ieee;

use ieee.std_logic_1164.all;

use work.slvtypes.all;

package sys_conf is

  constant sys_conf_hio_debounce : boolean := true;    -- instantiate debouncers

  constant sys_conf_ser2rri_cdinit : integer := 434-1;   -- 50000000/115200

  constant sys_conf_bram           : integer :=  0;      -- no bram, use cache

  constant sys_conf_bram_awidth    : integer := 14;      -- bram size (16 kB)

  constant sys_conf_mem_losize     : integer := 8#037777#; --   1 MByte

--constant sys_conf_mem_losize     : integer := 8#003777#; -- 128 kByte (debug)

--  constant sys_conf_bram           : integer :=  1;      --  bram only 

--  constant sys_conf_bram_awidth    : integer := 15;      -- bram size (32 kB)

--  constant sys_conf_mem_losize     : integer := 8#000777#; -- 32 kByte

  constant sys_conf_cache_fmiss    : slbit   := '0';     -- cache enabled

end package sys_conf;

-- Note: mem_losize holds 16 MSB of the PA of the addressable memory

--        2 211 111 111 110 000 000 000

--        1 098 765 432 109 876 543 210

--

--        0 000 000 011 111 111 000 000  -> 00037777  --> 14bit -->  16 kByte

--        0 000 000 111 111 111 000 000  -> 00077777  --> 15bit -->  32 kByte

--        0 000 001 111 111 111 000 000  -> 00177777  --> 16bit -->  64 kByte

--        0 000 011 111 111 111 000 000  -> 00377777  --> 17bit --> 128 kByte

--        0 011 111 111 111 111 000 000  -> 03777777  --> 20bit -->   1 MByte

--        1 110 111 111 111 111 000 000  -> 16777777  --> 22bit -->   4 MByte

--                                          upper 256 kB excluded for 11/70 UB