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-- $Id: sys_conf_sim.vhd 509 2013-04-21 20:46:20Z mueller $

--

-- Copyright 2010-2013 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_n2 (for simulation)

--

-- Dependencies:   -

-- Tool versions:  xst 11.4, 13.1; ghdl 0.26-0.29

-- Revision History: 

-- Date         Rev Version  Comment

-- 2013-04-21   509   1.2    add fx2 settings

-- 2011-11-27   433   1.1.1  use /1*1 to skip dcm in sim, _ssim fails with dcm

-- 2010-11-27   341   1.1    add dcm and memctl related constants (clksys=58)

-- 2010-05-28   295   1.0    Initial version (cloned from _s3)

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

library ieee;

use ieee.std_logic_1164.all;

use work.slvtypes.all;

package sys_conf is

  constant sys_conf_clkfx_divide : positive   :=  1;

  constant sys_conf_clkfx_multiply : positive :=  1;   -- no dcm in sim...

--  constant sys_conf_clkfx_divide : positive   :=  25;

--  constant sys_conf_clkfx_multiply : positive :=  28;   -- ==> 56 MHz

  constant sys_conf_memctl_read0delay : positive := 3;

  constant sys_conf_memctl_read1delay : positive := sys_conf_memctl_read0delay;

  constant sys_conf_memctl_writedelay : positive := 4;

  constant sys_conf_ser2rri_cdinit : integer := 1-1;   -- 1 cycle/bit in sim

  -- fx2 settings: petowidth=10 -> 2^10 30 MHz clocks -> ~33 usec

  constant sys_conf_fx2_petowidth  : positive := 10;

  constant sys_conf_fx2_ccwidth  : positive := 5;

  constant sys_conf_hio_debounce : boolean := false;   -- no debouncers

  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#167777#; --   4 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 := 16;      -- bram size (64 kB)

--  constant sys_conf_mem_losize     : integer := 8#001777#; -- 64 kByte

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

  -- derived constants

  constant sys_conf_clksys : integer :=

    (50000000/sys_conf_clkfx_divide)*sys_conf_clkfx_multiply;

  constant sys_conf_clksys_mhz : integer := sys_conf_clksys/1000000;

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