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-- $Id: sys_conf.vhd 692 2015-06-21 11:53:24Z mueller $

--

-- Copyright 2010-2015 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 synthesis)

--

-- Dependencies:   -

-- Tool versions:  xst 11.4-14.7; ghdl 0.26-0.31

-- Revision History: 

-- Date         Rev Version  Comment

-- 2015-06-21   692   1.4.1  use clksys=52 (no closure after rhrp fixes)

-- 2015-03-14   658   1.4    add sys_conf_ibd_* definitions

-- 2015-02-15   647   1.3    drop bram and minisys options

-- 2015-01-04   630   1.2.2  use clksys=54 (no closure after rlink r4 + RL11)

-- 2014-12-22   619   1.2.1  add _rbmon_awidth

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

-- 2011-11-19   428   1.1.1  use clksys=56 (58 no closure after numeric_std...)

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

-- 2010-05-05   295   1.0    Initial version (derived from _s3 version)

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

library ieee;

use ieee.std_logic_1164.all;

use work.slvtypes.all;

-- valid system clock / delay combinations:

--  div mul  clksys  read0 read1 write

--    1   1   50.0     2     2     3

--   25  27   54.0     3     3     3

--   25  29   58.0     3     3     4

package sys_conf is

  -- configure clocks --------------------------------------------------------

  constant sys_conf_clkfx_divide : positive   :=  25;

  constant sys_conf_clkfx_multiply : positive :=  26;   -- ==> 52 MHz

  -- configure rlink and hio interfaces --------------------------------------

  constant sys_conf_ser2rri_defbaud : integer := 115200;   -- default 115k baud

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

  -- 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;

  -- configure debug and monitoring units ------------------------------------

  constant sys_conf_rbmon_awidth : integer := 9; -- use 0 to disable rbmon

  constant sys_conf_ibmon_awidth : integer := 9; -- use 0 to disable ibmon

  -- configure memory controller ---------------------------------------------

  constant sys_conf_memctl_read0delay : positive := 3;

  constant sys_conf_memctl_read1delay : positive := sys_conf_memctl_read0delay;

  constant sys_conf_memctl_writedelay : positive := 4;

  -- configure w11 cpu core --------------------------------------------------

  constant sys_conf_mem_losize     : integer := 8#167777#; --   4 MByte

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

  -- configure w11 system devices --------------------------------------------

  -- configure character and communication devices

  constant sys_conf_ibd_dl11_1 : boolean := true;  -- 2nd DL11

  constant sys_conf_ibd_pc11   : boolean := true;  -- PC11

  constant sys_conf_ibd_lp11   : boolean := true;  -- LP11

  -- configure mass storage devices

  constant sys_conf_ibd_rk11   : boolean := true;  -- RK11

  constant sys_conf_ibd_rl11   : boolean := true;  -- RL11

  constant sys_conf_ibd_rhrp   : boolean := true;  -- RHRP

  constant sys_conf_ibd_tm11   : boolean := true;  -- TM11

  -- configure other devices

  constant sys_conf_ibd_iist   : boolean := true;  -- IIST

  -- 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;

  constant sys_conf_ser2rri_cdinit : integer :=

    (sys_conf_clksys/sys_conf_ser2rri_defbaud)-1;

end package sys_conf;