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-- $Id: sys_w11a_n2.vhd 440 2011-12-18 20:08:09Z mueller $
--
-- Copyright 2010-2011 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.
--
------------------------------------------------------------------------------
-- Module Name:    sys_w11a_n2 - syn
-- Description:    w11a test design for nexys2
--
-- Dependencies:   vlib/xlib/dcm_sfs
--                 vlib/genlib/clkdivce
--                 bplib/bpgen/bp_rs232_2l4l_iob
--                 bplib/bpgen/sn_humanio_rbus
--                 vlib/rlink/rlink_sp1c
--                 vlib/rri/rb_sres_or_3
--                 w11a/pdp11_core_rbus
--                 w11a/pdp11_core
--                 w11a/pdp11_bram
--                 vlib/nxcramlib/nx_cram_dummy
--                 w11a/pdp11_cache
--                 w11a/pdp11_mem70
--                 bplib/nxcramlib/nx_cram_memctl_as
--                 ibus/ib_sres_or_2
--                 ibus/ibdr_minisys
--                 ibus/ibdr_maxisys
--                 w11a/pdp11_tmu_sb           [sim only]
--
-- Test bench:     tb/tb_sys_w11a_n2
--
-- Target Devices: generic
-- Tool versions:  xst 8.2, 9.1, 9.2, 10.1, 11.4, 12.1, 13.1; ghdl 0.26-0.29
--
-- Synthesized (xst):
-- Date         Rev  ise         Target      flop lutl lutm slic t peri
-- 2011-12-18   440 13.1    O40d xc3s1200e-4 1450 4439  270 2740 ok: LP+PC+DL+II
-- 2011-11-18   427 13.1    O40d xc3s1200e-4 1433 4374  242 2680 ok: LP+PC+DL+II
-- 2010-12-30   351 12.1    M53d xc3s1200e-4 1389 4368  242 2674 ok: LP+PC+DL+II
-- 2010-11-06   336 12.1    M53d xc3s1200e-4 1357 4304* 242 2618 ok: LP+PC+DL+II
-- 2010-10-24   335 12.1    M53d xc3s1200e-4 1357 4546  242 2618 ok: LP+PC+DL+II
-- 2010-10-17   333 12.1    M53d xc3s1200e-4 1350 4541  242 2617 ok: LP+PC+DL+II
-- 2010-10-16   332 12.1    M53d xc3s1200e-4 1338 4545  242 2629 ok: LP+PC+DL+II
-- 2010-06-27   310 12.1    M53d xc3s1200e-4 1337 4307  242 2630 ok: LP+PC+DL+II
-- 2010-06-26   309 11.4    L68  xc3s1200e-4 1318 4293  242 2612 ok: LP+PC+DL+II
-- 2010-06-18   306 12.1    M53d xc3s1200e-4 1319 4300  242 2624 ok: LP+PC+DL+II
-- "            306 11.4    L68  xc3s1200e-4 1319 4286  242 2618 ok: LP+PC+DL+II
-- "            306 10.1.02 K39  xc3s1200e-4 1309 4311  242 2665 ok: LP+PC+DL+II
-- "            306  9.2.02 J40  xc3s1200e-4 1316 4259  242 2656 ok: LP+PC+DL+II
-- "            306  9.1    J30  xc3s1200e-4 1311 4260  242 2643 ok: LP+PC+DL+II
-- "            306  8.2.03 I34  xc3s1200e-4 1371 4394  242 2765 ok: LP+PC+DL+II
-- 2010-06-13   305 11.4    L68  xc3s1200e-4 1318 4360  242 2629 ok: LP+PC+DL+II
-- 2010-06-12   304 11.4    L68  xc3s1200e-4 1323 4201  242 2574 ok: LP+PC+DL+II
-- 2010-06-03   300 11.4    L68  xc3s1200e-4 1318 4181  242 2572 ok: LP+PC+DL+II
-- 2010-06-03   299 11.4    L68  xc3s1200e-4 1250 4071  224 2489 ok: LP+PC+DL+II
-- 2010-05-26   296 11.4    L68  xc3s1200e-4 1284 4079  224 2492 ok: LP+PC+DL+II
--   Note: till 2010-10-24 lutm included 'route-thru', after only logic
--
-- Revision History: 
-- Date         Rev Version  Comment
-- 2011-12-18   440   1.2.7  use rlink_sp1c
-- 2011-11-26   433   1.2.6  use nx_cram_(dummy|memctl_as) now
-- 2011-11-23   432   1.2.5  update O_FLA_CE_N usage
-- 2011-11-19   427   1.2.4  now numeric_std clean
-- 2011-11-17   426   1.2.3  use dcm_sfs now
-- 2011-07-09   391   1.2.2  use now bp_rs232_2l4l_iob
-- 2011-07-08   390   1.2.1  use now sn_humanio
-- 2010-12-30   351   1.2    ported to rbv3
-- 2010-11-27   341   1.1.8  add DCM; new sys_conf consts for mem and clkdiv
-- 2010-11-13   338   1.1.7  add O_CLKSYS (for DCM derived system clock)
-- 2010-11-06   336   1.1.6  rename input pin CLK -> I_CLK50
-- 2010-10-23   335   1.1.5  rename RRI_LAM->RB_LAM;
-- 2010-06-26   309   1.1.4  use constants for rbus addresses (rbaddr_...)
--                           BUGFIX: resolve rbus address clash hio<->ibr
-- 2010-06-18   306   1.1.3  change proc_led sensitivity list to avoid xst warn;
--                           rename RB_ADDR->RB_ADDR_CORE, add RB_ADDR_IBUS;
--                           remove pdp11_ibdr_rri
-- 2010-06-13   305   1.1.2  add CP_ADDR, wire up pdp11_core_rri->pdp11_core
-- 2010-06-12   304   1.1.1  re-do LED driver logic (show cpu modes or cpurust)
-- 2010-06-11   303   1.1    use IB_MREQ.racc instead of RRI_REQ
-- 2010-06-03   300   1.0.2  use default FAWIDTH for rri_core_serport
--                           use s3_humanio_rri
-- 2010-05-30   297   1.0.1  put MEM_ACT_(R|W) on LED 6,7
-- 2010-05-28   295   1.0    Initial version (derived from sys_w11a_s3)
------------------------------------------------------------------------------
--
-- w11a test design for nexys2
--    w11a + rlink + serport
--
-- Usage of Nexys 2 Switches, Buttons, LEDs:
--
--    SWI(7:2): no function (only connected to sn_humanio_rbus)
--    SWI(1):   1 enable XON
--    SWI(0):   0 -> main board RS232 port
--              1 -> Pmod B/top RS232 port
--    
--    LED(7)    MEM_ACT_W
--       (6)    MEM_ACT_R
--       (5)    cmdbusy (all rlink access, mostly rdma)
--       (4:0): if cpugo=1 show cpu mode activity
--                  (4) kernel mode, pri>0
--                  (3) kernel mode, pri=0
--                  (2) kernel mode, wait
--                  (1) supervisor mode
--                  (0) user mode
--              if cpugo=0 shows cpurust
--                (3:0) cpurust code
--                  (4) '1'
--
--    DP(3):    not SER_MONI.txok       (shows tx back preasure)
--    DP(2):    SER_MONI.txact          (shows tx activity)
--    DP(1):    not SER_MONI.rxok       (shows rx back preasure)
--    DP(0):    SER_MONI.rxact          (shows rx activity)
--
 
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
 
use work.slvtypes.all;
use work.xlib.all;
use work.genlib.all;
use work.serport.all;
use work.rblib.all;
use work.rlinklib.all;
use work.bpgenlib.all;
use work.nxcramlib.all;
use work.iblib.all;
use work.ibdlib.all;
use work.pdp11.all;
use work.sys_conf.all;
 
-- ----------------------------------------------------------------------------
 
entity sys_w11a_n2 is                   -- top level
                                        -- implements nexys2_fusp_aif
  port (
    I_CLK50 : in slbit;                 -- 50 MHz clock
    O_CLKSYS : out slbit;               -- DCM derived system clock
    I_RXD : in slbit;                   -- receive data (board view)
    O_TXD : out slbit;                  -- transmit data (board view)
    I_SWI : in slv8;                    -- n2 switches
    I_BTN : in slv4;                    -- n2 buttons
    O_LED : out slv8;                   -- n2 leds
    O_ANO_N : out slv4;                 -- 7 segment disp: anodes   (act.low)
    O_SEG_N : out slv8;                 -- 7 segment disp: segments (act.low)
    O_MEM_CE_N : out slbit;             -- cram: chip enable   (act.low)
    O_MEM_BE_N : out slv2;              -- cram: byte enables  (act.low)
    O_MEM_WE_N : out slbit;             -- cram: write enable  (act.low)
    O_MEM_OE_N : out slbit;             -- cram: output enable (act.low)
    O_MEM_ADV_N  : out slbit;           -- cram: address valid (act.low)
    O_MEM_CLK : out slbit;              -- cram: clock
    O_MEM_CRE : out slbit;              -- cram: command register enable
    I_MEM_WAIT : in slbit;              -- cram: mem wait
    O_MEM_ADDR  : out slv23;            -- cram: address lines
    IO_MEM_DATA : inout slv16;          -- cram: data lines
    O_FLA_CE_N : out slbit;             -- flash ce..          (act.low)
    O_FUSP_RTS_N : out slbit;           -- fusp: rs232 rts_n
    I_FUSP_CTS_N : in slbit;            -- fusp: rs232 cts_n
    I_FUSP_RXD : in slbit;              -- fusp: rs232 rx
    O_FUSP_TXD : out slbit              -- fusp: rs232 tx
  );
end sys_w11a_n2;
 
architecture syn of sys_w11a_n2 is
 
  signal CLK :   slbit := '0';
 
  signal RXD :   slbit := '1';
  signal TXD :   slbit := '0';
  signal RTS_N : slbit := '0';
  signal CTS_N : slbit := '0';
 
  signal SWI     : slv8  := (others=>'0');
  signal BTN     : slv4  := (others=>'0');
  signal LED     : slv8  := (others=>'0');
  signal DSP_DAT : slv16 := (others=>'0');
  signal DSP_DP  : slv4  := (others=>'0');
 
  signal RB_LAM  : slv16 := (others=>'0');
  signal RB_STAT : slv3  := (others=>'0');
 
  signal SER_MONI : serport_moni_type := serport_moni_init;
 
  signal RB_MREQ     : rb_mreq_type := rb_mreq_init;
  signal RB_SRES     : rb_sres_type := rb_sres_init;
  signal RB_SRES_CPU : rb_sres_type := rb_sres_init;
  signal RB_SRES_IBD : rb_sres_type := rb_sres_init;
  signal RB_SRES_HIO : rb_sres_type := rb_sres_init;
 
  signal RESET   : slbit := '0';
  signal CE_USEC : slbit := '0';
  signal CE_MSEC : slbit := '0';
 
  signal CPU_RESET : slbit := '0';
  signal CP_CNTL : cp_cntl_type := cp_cntl_init;
  signal CP_ADDR : cp_addr_type := cp_addr_init;
  signal CP_DIN  : slv16 := (others=>'0');
  signal CP_STAT : cp_stat_type := cp_stat_init;
  signal CP_DOUT : slv16 := (others=>'0');
 
  signal EI_PRI  : slv3   := (others=>'0');
  signal EI_VECT : slv9_2 := (others=>'0');
  signal EI_ACKM : slbit  := '0';
 
  signal EM_MREQ : em_mreq_type := em_mreq_init;
  signal EM_SRES : em_sres_type := em_sres_init;
 
  signal HM_ENA      : slbit := '0';
  signal MEM70_FMISS : slbit := '0';
  signal CACHE_FMISS : slbit := '0';
  signal CACHE_CHIT  : slbit := '0';
 
  signal MEM_REQ   : slbit := '0';
  signal MEM_WE    : slbit := '0';
  signal MEM_BUSY  : slbit := '0';
  signal MEM_ACK_R : slbit := '0';
  signal MEM_ACT_R : slbit := '0';
  signal MEM_ACT_W : slbit := '0';
  signal MEM_ADDR  : slv20 := (others=>'0');
  signal MEM_BE    : slv4  := (others=>'0');
  signal MEM_DI    : slv32 := (others=>'0');
  signal MEM_DO    : slv32 := (others=>'0');
 
  signal MEM_ADDR_EXT : slv22 := (others=>'0');
 
  signal BRESET  : slbit := '0';
  signal IB_MREQ : ib_mreq_type := ib_mreq_init;
  signal IB_SRES : ib_sres_type := ib_sres_init;
 
  signal IB_SRES_MEM70 : ib_sres_type := ib_sres_init;
  signal IB_SRES_IBDR  : ib_sres_type := ib_sres_init;
 
  signal DM_STAT_DP : dm_stat_dp_type := dm_stat_dp_init;
  signal DM_STAT_VM : dm_stat_vm_type := dm_stat_vm_init;
  signal DM_STAT_CO : dm_stat_co_type := dm_stat_co_init;
  signal DM_STAT_SY : dm_stat_sy_type := dm_stat_sy_init;
 
  signal DISPREG : slv16 := (others=>'0');
 
  constant rbaddr_core0 : slv8 := "00000000";
  constant rbaddr_ibus  : slv8 := "10000000";
  constant rbaddr_hio   : slv8 := "11000000";
 
begin
 
  assert (sys_conf_clksys mod 1000000) = 0
    report "assert sys_conf_clksys on MHz grid"
    severity failure;
 
  DCM : dcm_sfs
    generic map (
      CLKFX_DIVIDE   => sys_conf_clkfx_divide,
      CLKFX_MULTIPLY => sys_conf_clkfx_multiply,
      CLKIN_PERIOD   => 20.0)
    port map (
      CLKIN   => I_CLK50,
      CLKFX   => CLK,
      LOCKED  => open
    );
 
  O_CLKSYS <= CLK;
 
  CLKDIV : clkdivce
    generic map (
      CDUWIDTH => 6,
      USECDIV  => sys_conf_clksys_mhz,
      MSECDIV  => 1000)
    port map (
      CLK     => CLK,
      CE_USEC => CE_USEC,
      CE_MSEC => CE_MSEC
    );
 
  IOB_RS232 : bp_rs232_2l4l_iob
    port map (
      CLK      => CLK,
      RESET    => '0',
      SEL      => SWI(0),
      RXD      => RXD,
      TXD      => TXD,
      CTS_N    => CTS_N,
      RTS_N    => RTS_N,
      I_RXD0   => I_RXD,
      O_TXD0   => O_TXD,
      I_RXD1   => I_FUSP_RXD,
      O_TXD1   => O_FUSP_TXD,
      I_CTS1_N => I_FUSP_CTS_N,
      O_RTS1_N => O_FUSP_RTS_N
    );
 
  HIO : sn_humanio_rbus
    generic map (
      DEBOUNCE => sys_conf_hio_debounce,
      RB_ADDR  => rbaddr_hio)
    port map (
      CLK     => CLK,
      RESET   => RESET,
      CE_MSEC => CE_MSEC,
      RB_MREQ => RB_MREQ,
      RB_SRES => RB_SRES_HIO,
      SWI     => SWI,
      BTN     => BTN,
      LED     => LED,
      DSP_DAT => DSP_DAT,
      DSP_DP  => DSP_DP,
      I_SWI   => I_SWI,
      I_BTN   => I_BTN,
      O_LED   => O_LED,
      O_ANO_N => O_ANO_N,
      O_SEG_N => O_SEG_N
    );
 
  RLINK : rlink_sp1c
    generic map (
      ATOWIDTH     => 6,                --  64 cycles access timeout
      ITOWIDTH     => 6,                --  64 periods max idle timeout
      CPREF        => c_rlink_cpref,
      IFAWIDTH     => 5,                --  32 word input fifo
      OFAWIDTH     => 5,                --  32 word output fifo
      ENAPIN_RLMON => sbcntl_sbf_rlmon,
      ENAPIN_RBMON => sbcntl_sbf_rbmon,
      CDWIDTH      => 13,
      CDINIT       => sys_conf_ser2rri_cdinit)
    port map (
      CLK      => CLK,
      CE_USEC  => CE_USEC,
      CE_MSEC  => CE_MSEC,
      CE_INT   => CE_MSEC,
      RESET    => RESET,
      ENAXON   => SWI(1),
      ENAESC   => SWI(1),
      RXSD     => RXD,
      TXSD     => TXD,
      CTS_N    => CTS_N,
      RTS_N    => RTS_N,
      RB_MREQ  => RB_MREQ,
      RB_SRES  => RB_SRES,
      RB_LAM   => RB_LAM,
      RB_STAT  => RB_STAT,
      RL_MONI  => open,
      SER_MONI => SER_MONI
    );
 
  RB_SRES_OR : rb_sres_or_3
    port map (
      RB_SRES_1  => RB_SRES_CPU,
      RB_SRES_2  => RB_SRES_IBD,
      RB_SRES_3  => RB_SRES_HIO,
      RB_SRES_OR => RB_SRES
    );
 
  RB2CP : pdp11_core_rbus
    generic map (
      RB_ADDR_CORE => rbaddr_core0,
      RB_ADDR_IBUS => rbaddr_ibus)
    port map (
      CLK       => CLK,
      RESET     => RESET,
      RB_MREQ   => RB_MREQ,
      RB_SRES   => RB_SRES_CPU,
      RB_STAT   => RB_STAT,
      RB_LAM    => RB_LAM(0),
      CPU_RESET => CPU_RESET,
      CP_CNTL   => CP_CNTL,
      CP_ADDR   => CP_ADDR,
      CP_DIN    => CP_DIN,
      CP_STAT   => CP_STAT,
      CP_DOUT   => CP_DOUT
    );
 
  CORE : pdp11_core
    port map (
      CLK       => CLK,
      RESET     => CPU_RESET,
      CP_CNTL   => CP_CNTL,
      CP_ADDR   => CP_ADDR,
      CP_DIN    => CP_DIN,
      CP_STAT   => CP_STAT,
      CP_DOUT   => CP_DOUT,
      EI_PRI    => EI_PRI,
      EI_VECT   => EI_VECT,
      EI_ACKM   => EI_ACKM,
      EM_MREQ   => EM_MREQ,
      EM_SRES   => EM_SRES,
      BRESET    => BRESET,
      IB_MREQ_M => IB_MREQ,
      IB_SRES_M => IB_SRES,
      DM_STAT_DP => DM_STAT_DP,
      DM_STAT_VM => DM_STAT_VM,
      DM_STAT_CO => DM_STAT_CO
    );
 
  MEM_BRAM: if sys_conf_bram > 0 generate
    signal HM_VAL_BRAM : slbit := '0';
  begin
 
    MEM : pdp11_bram
      generic map (
        AWIDTH => sys_conf_bram_awidth)
      port map (
        CLK     => CLK,
        GRESET  => CPU_RESET,
        EM_MREQ => EM_MREQ,
        EM_SRES => EM_SRES
      );
 
    HM_VAL_BRAM <= not EM_MREQ.we;        -- assume hit if read, miss if write
 
    MEM70: pdp11_mem70
      port map (
        CLK         => CLK,
        CRESET      => BRESET,
        HM_ENA      => EM_MREQ.req,
        HM_VAL      => HM_VAL_BRAM,
        CACHE_FMISS => MEM70_FMISS,
        IB_MREQ     => IB_MREQ,
        IB_SRES     => IB_SRES_MEM70
      );
 
    SRAM_PROT : nx_cram_dummy            -- connect CRAM to protection dummy
      port map (
        O_MEM_CE_N  => O_MEM_CE_N,
        O_MEM_BE_N  => O_MEM_BE_N,
        O_MEM_WE_N  => O_MEM_WE_N,
        O_MEM_OE_N  => O_MEM_OE_N,
        O_MEM_ADV_N => O_MEM_ADV_N,
        O_MEM_CLK   => O_MEM_CLK,
        O_MEM_CRE   => O_MEM_CRE,
        I_MEM_WAIT  => I_MEM_WAIT,
        O_MEM_ADDR  => O_MEM_ADDR,
        IO_MEM_DATA => IO_MEM_DATA
      );
 
    O_FLA_CE_N  <= '1';                   -- keep Flash memory disabled
 
  end generate MEM_BRAM;
 
  MEM_SRAM: if sys_conf_bram = 0 generate
 
    CACHE: pdp11_cache
      port map (
        CLK       => CLK,
        GRESET    => CPU_RESET,
        EM_MREQ   => EM_MREQ,
        EM_SRES   => EM_SRES,
        FMISS     => CACHE_FMISS,
        CHIT      => CACHE_CHIT,
        MEM_REQ   => MEM_REQ,
        MEM_WE    => MEM_WE,
        MEM_BUSY  => MEM_BUSY,
        MEM_ACK_R => MEM_ACK_R,
        MEM_ADDR  => MEM_ADDR,
        MEM_BE    => MEM_BE,
        MEM_DI    => MEM_DI,
        MEM_DO    => MEM_DO
      );
 
    MEM70: pdp11_mem70
      port map (
        CLK         => CLK,
        CRESET      => BRESET,
        HM_ENA      => HM_ENA,
        HM_VAL      => CACHE_CHIT,
        CACHE_FMISS => MEM70_FMISS,
        IB_MREQ     => IB_MREQ,
        IB_SRES     => IB_SRES_MEM70
      );
 
    HM_ENA      <= EM_SRES.ack_r or EM_SRES.ack_w;
    CACHE_FMISS <= MEM70_FMISS or sys_conf_cache_fmiss;
 
    MEM_ADDR_EXT <= "00" & MEM_ADDR;    -- just use lower 4 MB (of 16 MB)
 
    SRAM_CTL: nx_cram_memctl_as
      generic map (
        READ0DELAY => sys_conf_memctl_read0delay,
        READ1DELAY => sys_conf_memctl_read1delay,
        WRITEDELAY => sys_conf_memctl_writedelay)
      port map (
        CLK         => CLK,
        RESET       => CPU_RESET,
        REQ         => MEM_REQ,
        WE          => MEM_WE,
        BUSY        => MEM_BUSY,
        ACK_R       => MEM_ACK_R,
        ACK_W       => open,
        ACT_R       => MEM_ACT_R,
        ACT_W       => MEM_ACT_W,
        ADDR        => MEM_ADDR_EXT,
        BE          => MEM_BE,
        DI          => MEM_DI,
        DO          => MEM_DO,
        O_MEM_CE_N  => O_MEM_CE_N,
        O_MEM_BE_N  => O_MEM_BE_N,
        O_MEM_WE_N  => O_MEM_WE_N,
        O_MEM_OE_N  => O_MEM_OE_N,
        O_MEM_ADV_N => O_MEM_ADV_N,
        O_MEM_CLK   => O_MEM_CLK,
        O_MEM_CRE   => O_MEM_CRE,
        I_MEM_WAIT  => I_MEM_WAIT,
        O_MEM_ADDR  => O_MEM_ADDR,
        IO_MEM_DATA => IO_MEM_DATA
      );
 
    O_FLA_CE_N  <= '1';                   -- keep Flash memory disabled
 
  end generate MEM_SRAM;
 
  IB_SRES_OR : ib_sres_or_2
    port map (
      IB_SRES_1  => IB_SRES_MEM70,
      IB_SRES_2  => IB_SRES_IBDR,
      IB_SRES_OR => IB_SRES
    );
 
  IBD_MINI : if false generate
  begin
    IBDR_SYS : ibdr_minisys
      port map (
        CLK      => CLK,
        CE_USEC  => CE_USEC,
        CE_MSEC  => CE_MSEC,
        RESET    => CPU_RESET,
        BRESET   => BRESET,
        RB_LAM   => RB_LAM(15 downto 1),
        IB_MREQ  => IB_MREQ,
        IB_SRES  => IB_SRES_IBDR,
        EI_ACKM  => EI_ACKM,
        EI_PRI   => EI_PRI,
        EI_VECT  => EI_VECT,
        DISPREG  => DISPREG
      );
  end generate IBD_MINI;
 
  IBD_MAXI : if true generate
  begin
    IBDR_SYS : ibdr_maxisys
      port map (
        CLK      => CLK,
        CE_USEC  => CE_USEC,
        CE_MSEC  => CE_MSEC,
        RESET    => CPU_RESET,
        BRESET   => BRESET,
        RB_LAM   => RB_LAM(15 downto 1),
        IB_MREQ  => IB_MREQ,
        IB_SRES  => IB_SRES_IBDR,
        EI_ACKM  => EI_ACKM,
        EI_PRI   => EI_PRI,
        EI_VECT  => EI_VECT,
        DISPREG  => DISPREG
      );
  end generate IBD_MAXI;
 
  DSP_DAT(15 downto 0) <= DISPREG;
 
  DSP_DP(3) <= not SER_MONI.txok;
  DSP_DP(2) <= SER_MONI.txact;
  DSP_DP(1) <= not SER_MONI.rxok;
  DSP_DP(0) <= SER_MONI.rxact;
 
  proc_led: process (MEM_ACT_W, MEM_ACT_R, CP_STAT, DM_STAT_DP.psw)
    variable iled : slv8 := (others=>'0');
  begin
    iled := (others=>'0');
    iled(7) := MEM_ACT_W;
    iled(6) := MEM_ACT_R;
    iled(5) := CP_STAT.cmdbusy;
    if CP_STAT.cpugo = '1' then
      case DM_STAT_DP.psw.cmode is
        when c_psw_kmode =>
          if CP_STAT.cpuwait = '1' then
            iled(2) := '1';
          elsif unsigned(DM_STAT_DP.psw.pri) = 0 then
            iled(3) := '1';
          else
            iled(4) := '1';
          end if;
        when c_psw_smode =>
          iled(1) := '1';
        when c_psw_umode =>
          iled(0) := '1';
        when others => null;
      end case;
    else
      iled(4) := '1';
      iled(3 downto 0) := CP_STAT.cpurust;
    end if;
    LED <= iled;
  end process;
 
-- synthesis translate_off
  DM_STAT_SY.emmreq <= EM_MREQ;
  DM_STAT_SY.emsres <= EM_SRES;
  DM_STAT_SY.chit   <= CACHE_CHIT;
 
  TMU : pdp11_tmu_sb
    generic map (
      ENAPIN => 13)
    port map (
      CLK        => CLK,
      DM_STAT_DP => DM_STAT_DP,
      DM_STAT_VM => DM_STAT_VM,
      DM_STAT_CO => DM_STAT_CO,
      DM_STAT_SY => DM_STAT_SY
    );
-- synthesis translate_on
 
end syn;

Line No.	Rev	Author	Line
1	16	wfjm	`-- $Id: sys_w11a_n2.vhd 440 2011-12-18 20:08:09Z mueller $`
2	2	wfjm	`--`
3	12	wfjm	`-- Copyright 2010-2011 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>`
4	2	wfjm	`--`
5			`-- This program is free software; you may redistribute and/or modify it under`
6			`-- the terms of the GNU General Public License as published by the Free`
7			`-- Software Foundation, either version 2, or at your option any later version.`
8			`--`
9			`-- This program is distributed in the hope that it will be useful, but`
10			`-- WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY`
11			`-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License`
12			`-- for complete details.`
13			`--`
14			`------------------------------------------------------------------------------`
15			`-- Module Name: sys_w11a_n2 - syn`
16			`-- Description: w11a test design for nexys2`
17			`--`
18	13	wfjm	`-- Dependencies: vlib/xlib/dcm_sfs`
19	8	wfjm	`-- vlib/genlib/clkdivce`
20	12	wfjm	`-- bplib/bpgen/bp_rs232_2l4l_iob`
21			`-- bplib/bpgen/sn_humanio_rbus`
22	16	wfjm	`-- vlib/rlink/rlink_sp1c`
23	2	wfjm	`-- vlib/rri/rb_sres_or_3`
24	9	wfjm	`-- w11a/pdp11_core_rbus`
25	2	wfjm	`-- w11a/pdp11_core`
26			`-- w11a/pdp11_bram`
27	15	wfjm	`-- vlib/nxcramlib/nx_cram_dummy`
28	2	wfjm	`-- w11a/pdp11_cache`
29			`-- w11a/pdp11_mem70`
30	15	wfjm	`-- bplib/nxcramlib/nx_cram_memctl_as`
31	2	wfjm	`-- ibus/ib_sres_or_2`
32			`-- ibus/ibdr_minisys`
33			`-- ibus/ibdr_maxisys`
34			`-- w11a/pdp11_tmu_sb [sim only]`
35			`--`
36	12	wfjm	`-- Test bench: tb/tb_sys_w11a_n2`
37	2	wfjm	`--`
38			`-- Target Devices: generic`
39	13	wfjm	`-- Tool versions: xst 8.2, 9.1, 9.2, 10.1, 11.4, 12.1, 13.1; ghdl 0.26-0.29`
40	2	wfjm	`--`
41			`-- Synthesized (xst):`
42			`-- Date Rev ise Target flop lutl lutm slic t peri`
43	16	wfjm	`-- 2011-12-18 440 13.1 O40d xc3s1200e-4 1450 4439 270 2740 ok: LP+PC+DL+II`
44	13	wfjm	`-- 2011-11-18 427 13.1 O40d xc3s1200e-4 1433 4374 242 2680 ok: LP+PC+DL+II`
45	9	wfjm	`-- 2010-12-30 351 12.1 M53d xc3s1200e-4 1389 4368 242 2674 ok: LP+PC+DL+II`
46	8	wfjm	`-- 2010-11-06 336 12.1 M53d xc3s1200e-4 1357 4304* 242 2618 ok: LP+PC+DL+II`
47			`-- 2010-10-24 335 12.1 M53d xc3s1200e-4 1357 4546 242 2618 ok: LP+PC+DL+II`
48			`-- 2010-10-17 333 12.1 M53d xc3s1200e-4 1350 4541 242 2617 ok: LP+PC+DL+II`
49			`-- 2010-10-16 332 12.1 M53d xc3s1200e-4 1338 4545 242 2629 ok: LP+PC+DL+II`
50			`-- 2010-06-27 310 12.1 M53d xc3s1200e-4 1337 4307 242 2630 ok: LP+PC+DL+II`
51	2	wfjm	`-- 2010-06-26 309 11.4 L68 xc3s1200e-4 1318 4293 242 2612 ok: LP+PC+DL+II`
52			`-- 2010-06-18 306 12.1 M53d xc3s1200e-4 1319 4300 242 2624 ok: LP+PC+DL+II`
53			`-- " 306 11.4 L68 xc3s1200e-4 1319 4286 242 2618 ok: LP+PC+DL+II`
54			`-- " 306 10.1.02 K39 xc3s1200e-4 1309 4311 242 2665 ok: LP+PC+DL+II`
55			`-- " 306 9.2.02 J40 xc3s1200e-4 1316 4259 242 2656 ok: LP+PC+DL+II`
56			`-- " 306 9.1 J30 xc3s1200e-4 1311 4260 242 2643 ok: LP+PC+DL+II`
57			`-- " 306 8.2.03 I34 xc3s1200e-4 1371 4394 242 2765 ok: LP+PC+DL+II`
58			`-- 2010-06-13 305 11.4 L68 xc3s1200e-4 1318 4360 242 2629 ok: LP+PC+DL+II`
59			`-- 2010-06-12 304 11.4 L68 xc3s1200e-4 1323 4201 242 2574 ok: LP+PC+DL+II`
60			`-- 2010-06-03 300 11.4 L68 xc3s1200e-4 1318 4181 242 2572 ok: LP+PC+DL+II`
61			`-- 2010-06-03 299 11.4 L68 xc3s1200e-4 1250 4071 224 2489 ok: LP+PC+DL+II`
62			`-- 2010-05-26 296 11.4 L68 xc3s1200e-4 1284 4079 224 2492 ok: LP+PC+DL+II`
63	8	wfjm	`-- Note: till 2010-10-24 lutm included 'route-thru', after only logic`
64	2	wfjm	`--`
65			`-- Revision History:`
66			`-- Date Rev Version Comment`
67	16	wfjm	`-- 2011-12-18 440 1.2.7 use rlink_sp1c`
68	15	wfjm	`-- 2011-11-26 433 1.2.6 use nx_cram_(dummy\|memctl_as) now`
69			`-- 2011-11-23 432 1.2.5 update O_FLA_CE_N usage`
70	13	wfjm	`-- 2011-11-19 427 1.2.4 now numeric_std clean`
71			`-- 2011-11-17 426 1.2.3 use dcm_sfs now`
72	12	wfjm	`-- 2011-07-09 391 1.2.2 use now bp_rs232_2l4l_iob`
73			`-- 2011-07-08 390 1.2.1 use now sn_humanio`
74	9	wfjm	`-- 2010-12-30 351 1.2 ported to rbv3`
75	8	wfjm	`-- 2010-11-27 341 1.1.8 add DCM; new sys_conf consts for mem and clkdiv`
76			`-- 2010-11-13 338 1.1.7 add O_CLKSYS (for DCM derived system clock)`
77			`-- 2010-11-06 336 1.1.6 rename input pin CLK -> I_CLK50`
78			`-- 2010-10-23 335 1.1.5 rename RRI_LAM->RB_LAM;`
79	2	wfjm	`-- 2010-06-26 309 1.1.4 use constants for rbus addresses (rbaddr_...)`
80			`-- BUGFIX: resolve rbus address clash hio<->ibr`
81			`-- 2010-06-18 306 1.1.3 change proc_led sensitivity list to avoid xst warn;`
82			`-- rename RB_ADDR->RB_ADDR_CORE, add RB_ADDR_IBUS;`
83			`-- remove pdp11_ibdr_rri`
84			`-- 2010-06-13 305 1.1.2 add CP_ADDR, wire up pdp11_core_rri->pdp11_core`
85			`-- 2010-06-12 304 1.1.1 re-do LED driver logic (show cpu modes or cpurust)`
86			`-- 2010-06-11 303 1.1 use IB_MREQ.racc instead of RRI_REQ`
87			`-- 2010-06-03 300 1.0.2 use default FAWIDTH for rri_core_serport`
88			`-- use s3_humanio_rri`
89			`-- 2010-05-30 297 1.0.1 put MEM_ACT_(R\|W) on LED 6,7`
90			`-- 2010-05-28 295 1.0 Initial version (derived from sys_w11a_s3)`
91			`------------------------------------------------------------------------------`
92			`--`
93			`-- w11a test design for nexys2`
94	9	wfjm	`-- w11a + rlink + serport`
95	2	wfjm	`--`
96			`-- Usage of Nexys 2 Switches, Buttons, LEDs:`
97			`--`
98	16	wfjm	`-- SWI(7:2): no function (only connected to sn_humanio_rbus)`
99			`-- SWI(1): 1 enable XON`
100	2	wfjm	`-- SWI(0): 0 -> main board RS232 port`
101			`-- 1 -> Pmod B/top RS232 port`
102			`--`
103	16	wfjm	`-- LED(7) MEM_ACT_W`
104			`-- (6) MEM_ACT_R`
105			`-- (5) cmdbusy (all rlink access, mostly rdma)`
106			`-- (4:0): if cpugo=1 show cpu mode activity`
107			`-- (4) kernel mode, pri>0`
108			`-- (3) kernel mode, pri=0`
109			`-- (2) kernel mode, wait`
110			`-- (1) supervisor mode`
111	2	wfjm	`-- (0) user mode`
112			`-- if cpugo=0 shows cpurust`
113			`-- (3:0) cpurust code`
114			`-- (4) '1'`
115			`--`
116	16	wfjm	`-- DP(3): not SER_MONI.txok (shows tx back preasure)`
117			`-- DP(2): SER_MONI.txact (shows tx activity)`
118			`-- DP(1): not SER_MONI.rxok (shows rx back preasure)`
119			`-- DP(0): SER_MONI.rxact (shows rx activity)`
120			`--`
121	2	wfjm
122			`library ieee;`
123			`use ieee.std_logic_1164.all;`
124	13	wfjm	`use ieee.numeric_std.all;`
125	2	wfjm
126			`use work.slvtypes.all;`
127	8	wfjm	`use work.xlib.all;`
128	2	wfjm	`use work.genlib.all;`
129	16	wfjm	`use work.serport.all;`
130	9	wfjm	`use work.rblib.all;`
131			`use work.rlinklib.all;`
132	12	wfjm	`use work.bpgenlib.all;`
133	15	wfjm	`use work.nxcramlib.all;`
134	2	wfjm	`use work.iblib.all;`
135			`use work.ibdlib.all;`
136			`use work.pdp11.all;`
137			`use work.sys_conf.all;`
138
139			`-- ----------------------------------------------------------------------------`
140
141			`entity sys_w11a_n2 is -- top level`
142			`-- implements nexys2_fusp_aif`
143			`port (`
144	8	wfjm	`I_CLK50 : in slbit; -- 50 MHz clock`
145			`O_CLKSYS : out slbit; -- DCM derived system clock`
146	2	wfjm	`I_RXD : in slbit; -- receive data (board view)`
147			`O_TXD : out slbit; -- transmit data (board view)`
148	15	wfjm	`I_SWI : in slv8; -- n2 switches`
149			`I_BTN : in slv4; -- n2 buttons`
150			`O_LED : out slv8; -- n2 leds`
151	2	wfjm	`O_ANO_N : out slv4; -- 7 segment disp: anodes (act.low)`
152			`O_SEG_N : out slv8; -- 7 segment disp: segments (act.low)`
153			`O_MEM_CE_N : out slbit; -- cram: chip enable (act.low)`
154			`O_MEM_BE_N : out slv2; -- cram: byte enables (act.low)`
155			`O_MEM_WE_N : out slbit; -- cram: write enable (act.low)`
156			`O_MEM_OE_N : out slbit; -- cram: output enable (act.low)`
157			`O_MEM_ADV_N : out slbit; -- cram: address valid (act.low)`
158			`O_MEM_CLK : out slbit; -- cram: clock`
159			`O_MEM_CRE : out slbit; -- cram: command register enable`
160			`I_MEM_WAIT : in slbit; -- cram: mem wait`
161			`O_MEM_ADDR : out slv23; -- cram: address lines`
162			`IO_MEM_DATA : inout slv16; -- cram: data lines`
163	15	wfjm	`O_FLA_CE_N : out slbit; -- flash ce.. (act.low)`
164	2	wfjm	`O_FUSP_RTS_N : out slbit; -- fusp: rs232 rts_n`
165			`I_FUSP_CTS_N : in slbit; -- fusp: rs232 cts_n`
166			`I_FUSP_RXD : in slbit; -- fusp: rs232 rx`
167			`O_FUSP_TXD : out slbit -- fusp: rs232 tx`
168			`);`
169			`end sys_w11a_n2;`
170
171			`architecture syn of sys_w11a_n2 is`
172
173	8	wfjm	`signal CLK : slbit := '0';`
174
175	2	wfjm	`signal RXD : slbit := '1';`
176			`signal TXD : slbit := '0';`
177			`signal RTS_N : slbit := '0';`
178			`signal CTS_N : slbit := '0';`
179
180			`signal SWI : slv8 := (others=>'0');`
181			`signal BTN : slv4 := (others=>'0');`
182			`signal LED : slv8 := (others=>'0');`
183			`signal DSP_DAT : slv16 := (others=>'0');`
184			`signal DSP_DP : slv4 := (others=>'0');`
185
186			`signal RB_LAM : slv16 := (others=>'0');`
187			`signal RB_STAT : slv3 := (others=>'0');`
188
189	16	wfjm	`signal SER_MONI : serport_moni_type := serport_moni_init;`
190
191	2	wfjm	`signal RB_MREQ : rb_mreq_type := rb_mreq_init;`
192			`signal RB_SRES : rb_sres_type := rb_sres_init;`
193			`signal RB_SRES_CPU : rb_sres_type := rb_sres_init;`
194			`signal RB_SRES_IBD : rb_sres_type := rb_sres_init;`
195			`signal RB_SRES_HIO : rb_sres_type := rb_sres_init;`
196
197			`signal RESET : slbit := '0';`
198			`signal CE_USEC : slbit := '0';`
199			`signal CE_MSEC : slbit := '0';`
200
201			`signal CPU_RESET : slbit := '0';`
202			`signal CP_CNTL : cp_cntl_type := cp_cntl_init;`
203			`signal CP_ADDR : cp_addr_type := cp_addr_init;`
204			`signal CP_DIN : slv16 := (others=>'0');`
205			`signal CP_STAT : cp_stat_type := cp_stat_init;`
206			`signal CP_DOUT : slv16 := (others=>'0');`
207
208			`signal EI_PRI : slv3 := (others=>'0');`
209			`signal EI_VECT : slv9_2 := (others=>'0');`
210			`signal EI_ACKM : slbit := '0';`
211
212			`signal EM_MREQ : em_mreq_type := em_mreq_init;`
213			`signal EM_SRES : em_sres_type := em_sres_init;`
214
215			`signal HM_ENA : slbit := '0';`
216			`signal MEM70_FMISS : slbit := '0';`
217			`signal CACHE_FMISS : slbit := '0';`
218			`signal CACHE_CHIT : slbit := '0';`
219
220			`signal MEM_REQ : slbit := '0';`
221			`signal MEM_WE : slbit := '0';`
222			`signal MEM_BUSY : slbit := '0';`
223			`signal MEM_ACK_R : slbit := '0';`
224			`signal MEM_ACT_R : slbit := '0';`
225			`signal MEM_ACT_W : slbit := '0';`
226			`signal MEM_ADDR : slv20 := (others=>'0');`
227			`signal MEM_BE : slv4 := (others=>'0');`
228			`signal MEM_DI : slv32 := (others=>'0');`
229			`signal MEM_DO : slv32 := (others=>'0');`
230
231			`signal MEM_ADDR_EXT : slv22 := (others=>'0');`
232
233			`signal BRESET : slbit := '0';`
234			`signal IB_MREQ : ib_mreq_type := ib_mreq_init;`
235			`signal IB_SRES : ib_sres_type := ib_sres_init;`
236
237			`signal IB_SRES_MEM70 : ib_sres_type := ib_sres_init;`
238			`signal IB_SRES_IBDR : ib_sres_type := ib_sres_init;`
239
240			`signal DM_STAT_DP : dm_stat_dp_type := dm_stat_dp_init;`
241			`signal DM_STAT_VM : dm_stat_vm_type := dm_stat_vm_init;`
242			`signal DM_STAT_CO : dm_stat_co_type := dm_stat_co_init;`
243			`signal DM_STAT_SY : dm_stat_sy_type := dm_stat_sy_init;`
244
245			`signal DISPREG : slv16 := (others=>'0');`
246
247			`constant rbaddr_core0 : slv8 := "00000000";`
248			`constant rbaddr_ibus : slv8 := "10000000";`
249			`constant rbaddr_hio : slv8 := "11000000";`
250
251			`begin`
252
253	8	wfjm	`assert (sys_conf_clksys mod 1000000) = 0`
254			`report "assert sys_conf_clksys on MHz grid"`
255			`severity failure;`
256
257	13	wfjm	`DCM : dcm_sfs`
258	8	wfjm	`generic map (`
259			`CLKFX_DIVIDE => sys_conf_clkfx_divide,`
260			`CLKFX_MULTIPLY => sys_conf_clkfx_multiply,`
261			`CLKIN_PERIOD => 20.0)`
262			`port map (`
263			`CLKIN => I_CLK50,`
264			`CLKFX => CLK,`
265			`LOCKED => open`
266			`);`
267
268			`O_CLKSYS <= CLK;`
269
270	2	wfjm	`CLKDIV : clkdivce`
271			`generic map (`
272			`CDUWIDTH => 6,`
273	8	wfjm	`USECDIV => sys_conf_clksys_mhz,`
274	2	wfjm	`MSECDIV => 1000)`
275			`port map (`
276			`CLK => CLK,`
277			`CE_USEC => CE_USEC,`
278			`CE_MSEC => CE_MSEC`
279			`);`
280
281	12	wfjm	`IOB_RS232 : bp_rs232_2l4l_iob`
282	2	wfjm	`port map (`
283			`CLK => CLK,`
284	12	wfjm	`RESET => '0',`
285	2	wfjm	`SEL => SWI(0),`
286			`RXD => RXD,`
287			`TXD => TXD,`
288			`CTS_N => CTS_N,`
289			`RTS_N => RTS_N,`
290			`I_RXD0 => I_RXD,`
291			`O_TXD0 => O_TXD,`
292			`I_RXD1 => I_FUSP_RXD,`
293			`O_TXD1 => O_FUSP_TXD,`
294			`I_CTS1_N => I_FUSP_CTS_N,`
295			`O_RTS1_N => O_FUSP_RTS_N`
296			`);`
297
298	12	wfjm	`HIO : sn_humanio_rbus`
299	2	wfjm	`generic map (`
300			`DEBOUNCE => sys_conf_hio_debounce,`
301			`RB_ADDR => rbaddr_hio)`
302			`port map (`
303			`CLK => CLK,`
304			`RESET => RESET,`
305			`CE_MSEC => CE_MSEC,`
306			`RB_MREQ => RB_MREQ,`
307			`RB_SRES => RB_SRES_HIO,`
308			`SWI => SWI,`
309			`BTN => BTN,`
310			`LED => LED,`
311			`DSP_DAT => DSP_DAT,`
312			`DSP_DP => DSP_DP,`
313			`I_SWI => I_SWI,`
314			`I_BTN => I_BTN,`
315			`O_LED => O_LED,`
316			`O_ANO_N => O_ANO_N,`
317			`O_SEG_N => O_SEG_N`
318			`);`
319
320	16	wfjm	`RLINK : rlink_sp1c`
321	2	wfjm	`generic map (`
322	16	wfjm	`ATOWIDTH => 6, -- 64 cycles access timeout`
323			`ITOWIDTH => 6, -- 64 periods max idle timeout`
324			`CPREF => c_rlink_cpref,`
325			`IFAWIDTH => 5, -- 32 word input fifo`
326			`OFAWIDTH => 5, -- 32 word output fifo`
327			`ENAPIN_RLMON => sbcntl_sbf_rlmon,`
328			`ENAPIN_RBMON => sbcntl_sbf_rbmon,`
329			`CDWIDTH => 13,`
330			`CDINIT => sys_conf_ser2rri_cdinit)`
331	2	wfjm	`port map (`
332			`CLK => CLK,`
333			`CE_USEC => CE_USEC,`
334			`CE_MSEC => CE_MSEC,`
335			`CE_INT => CE_MSEC,`
336			`RESET => RESET,`
337	16	wfjm	`ENAXON => SWI(1),`
338			`ENAESC => SWI(1),`
339	2	wfjm	`RXSD => RXD,`
340			`TXSD => TXD,`
341			`CTS_N => CTS_N,`
342			`RTS_N => RTS_N,`
343			`RB_MREQ => RB_MREQ,`
344			`RB_SRES => RB_SRES,`
345			`RB_LAM => RB_LAM,`
346	9	wfjm	`RB_STAT => RB_STAT,`
347			`RL_MONI => open,`
348	16	wfjm	`SER_MONI => SER_MONI`
349	2	wfjm	`);`
350
351			`RB_SRES_OR : rb_sres_or_3`
352			`port map (`
353			`RB_SRES_1 => RB_SRES_CPU,`
354			`RB_SRES_2 => RB_SRES_IBD,`
355			`RB_SRES_3 => RB_SRES_HIO,`
356			`RB_SRES_OR => RB_SRES`
357			`);`
358
359	9	wfjm	`RB2CP : pdp11_core_rbus`
360	2	wfjm	`generic map (`
361			`RB_ADDR_CORE => rbaddr_core0,`
362			`RB_ADDR_IBUS => rbaddr_ibus)`
363			`port map (`
364			`CLK => CLK,`
365			`RESET => RESET,`
366			`RB_MREQ => RB_MREQ,`
367			`RB_SRES => RB_SRES_CPU,`
368			`RB_STAT => RB_STAT,`
369	8	wfjm	`RB_LAM => RB_LAM(0),`
370	2	wfjm	`CPU_RESET => CPU_RESET,`
371			`CP_CNTL => CP_CNTL,`
372			`CP_ADDR => CP_ADDR,`
373			`CP_DIN => CP_DIN,`
374			`CP_STAT => CP_STAT,`
375			`CP_DOUT => CP_DOUT`
376			`);`
377
378			`CORE : pdp11_core`
379			`port map (`
380			`CLK => CLK,`
381			`RESET => CPU_RESET,`
382			`CP_CNTL => CP_CNTL,`
383			`CP_ADDR => CP_ADDR,`
384			`CP_DIN => CP_DIN,`
385			`CP_STAT => CP_STAT,`
386			`CP_DOUT => CP_DOUT,`
387			`EI_PRI => EI_PRI,`
388			`EI_VECT => EI_VECT,`
389			`EI_ACKM => EI_ACKM,`
390			`EM_MREQ => EM_MREQ,`
391			`EM_SRES => EM_SRES,`
392			`BRESET => BRESET,`
393			`IB_MREQ_M => IB_MREQ,`
394			`IB_SRES_M => IB_SRES,`
395			`DM_STAT_DP => DM_STAT_DP,`
396			`DM_STAT_VM => DM_STAT_VM,`
397			`DM_STAT_CO => DM_STAT_CO`
398			`);`
399
400			`MEM_BRAM: if sys_conf_bram > 0 generate`
401			`signal HM_VAL_BRAM : slbit := '0';`
402			`begin`
403
404			`MEM : pdp11_bram`
405			`generic map (`
406			`AWIDTH => sys_conf_bram_awidth)`
407			`port map (`
408			`CLK => CLK,`
409			`GRESET => CPU_RESET,`
410			`EM_MREQ => EM_MREQ,`
411			`EM_SRES => EM_SRES`
412			`);`
413
414			`HM_VAL_BRAM <= not EM_MREQ.we; -- assume hit if read, miss if write`
415
416			`MEM70: pdp11_mem70`
417			`port map (`
418			`CLK => CLK,`
419			`CRESET => BRESET,`
420			`HM_ENA => EM_MREQ.req,`
421			`HM_VAL => HM_VAL_BRAM,`
422			`CACHE_FMISS => MEM70_FMISS,`
423			`IB_MREQ => IB_MREQ,`
424			`IB_SRES => IB_SRES_MEM70`
425			`);`
426
427	15	wfjm	`SRAM_PROT : nx_cram_dummy -- connect CRAM to protection dummy`
428	2	wfjm	`port map (`
429			`O_MEM_CE_N => O_MEM_CE_N,`
430			`O_MEM_BE_N => O_MEM_BE_N,`
431			`O_MEM_WE_N => O_MEM_WE_N,`
432			`O_MEM_OE_N => O_MEM_OE_N,`
433			`O_MEM_ADV_N => O_MEM_ADV_N,`
434			`O_MEM_CLK => O_MEM_CLK,`
435			`O_MEM_CRE => O_MEM_CRE,`
436			`I_MEM_WAIT => I_MEM_WAIT,`
437			`O_MEM_ADDR => O_MEM_ADDR,`
438			`IO_MEM_DATA => IO_MEM_DATA`
439			`);`
440	15	wfjm
441			`O_FLA_CE_N <= '1'; -- keep Flash memory disabled`
442	2	wfjm
443			`end generate MEM_BRAM;`
444
445			`MEM_SRAM: if sys_conf_bram = 0 generate`
446
447			`CACHE: pdp11_cache`
448			`port map (`
449			`CLK => CLK,`
450			`GRESET => CPU_RESET,`
451			`EM_MREQ => EM_MREQ,`
452			`EM_SRES => EM_SRES,`
453			`FMISS => CACHE_FMISS,`
454			`CHIT => CACHE_CHIT,`
455			`MEM_REQ => MEM_REQ,`
456			`MEM_WE => MEM_WE,`
457			`MEM_BUSY => MEM_BUSY,`
458			`MEM_ACK_R => MEM_ACK_R,`
459			`MEM_ADDR => MEM_ADDR,`
460			`MEM_BE => MEM_BE,`
461			`MEM_DI => MEM_DI,`
462			`MEM_DO => MEM_DO`
463			`);`
464
465			`MEM70: pdp11_mem70`
466			`port map (`
467			`CLK => CLK,`
468			`CRESET => BRESET,`
469			`HM_ENA => HM_ENA,`
470			`HM_VAL => CACHE_CHIT,`
471			`CACHE_FMISS => MEM70_FMISS,`
472			`IB_MREQ => IB_MREQ,`
473			`IB_SRES => IB_SRES_MEM70`
474			`);`
475
476			`HM_ENA <= EM_SRES.ack_r or EM_SRES.ack_w;`
477			`CACHE_FMISS <= MEM70_FMISS or sys_conf_cache_fmiss;`
478
479			`MEM_ADDR_EXT <= "00" & MEM_ADDR; -- just use lower 4 MB (of 16 MB)`
480
481	15	wfjm	`SRAM_CTL: nx_cram_memctl_as`
482	2	wfjm	`generic map (`
483	8	wfjm	`READ0DELAY => sys_conf_memctl_read0delay,`
484			`READ1DELAY => sys_conf_memctl_read1delay,`
485			`WRITEDELAY => sys_conf_memctl_writedelay)`
486	2	wfjm	`port map (`
487			`CLK => CLK,`
488			`RESET => CPU_RESET,`
489			`REQ => MEM_REQ,`
490			`WE => MEM_WE,`
491			`BUSY => MEM_BUSY,`
492			`ACK_R => MEM_ACK_R,`
493			`ACK_W => open,`
494			`ACT_R => MEM_ACT_R,`
495			`ACT_W => MEM_ACT_W,`
496			`ADDR => MEM_ADDR_EXT,`
497			`BE => MEM_BE,`
498			`DI => MEM_DI,`
499			`DO => MEM_DO,`
500			`O_MEM_CE_N => O_MEM_CE_N,`

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[/] [w11/] [tags/] [w11a_V0.6/] [rtl/] [sys_gen/] [w11a/] [nexys2/] [sys_w11a_n2.vhd] - Blame information for rev 16