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-- $Id: pdp11_mmu.vhd 335 2010-10-24 22:24:23Z mueller $
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-- $Id: pdp11_mmu.vhd 427 2011-11-19 21:04:11Z mueller $
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--
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--
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-- Copyright 2006-2010 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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-- Copyright 2006-2011 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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--
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--
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-- This program is free software; you may redistribute and/or modify it under
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-- This program is free software; you may redistribute and/or modify it under
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-- the terms of the GNU General Public License as published by the Free
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-- the terms of the GNU General Public License as published by the Free
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-- Software Foundation, either version 2, or at your option any later version.
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-- Software Foundation, either version 2, or at your option any later version.
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--
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--
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-- ibus/ib_sres_or_3
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-- ibus/ib_sres_or_3
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-- ibus/ib_sel
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-- ibus/ib_sel
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--
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--
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-- Test bench: tb/tb_pdp11_core (implicit)
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-- Test bench: tb/tb_pdp11_core (implicit)
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-- Target Devices: generic
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-- Target Devices: generic
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-- Tool versions: xst 8.1, 8.2, 9.1, 9.2, 12.1; ghdl 0.18-0.29
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-- Tool versions: xst 8.2, 9.1, 9.2, 12.1, 13.1; ghdl 0.18-0.29
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--
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--
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-- Revision History:
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-- Revision History:
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-- Date Rev Version Comment
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-- Date Rev Version Comment
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-- 2011-11-18 427 1.4.2 now numeric_std clean
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-- 2010-10-23 335 1.4.1 use ib_sel
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-- 2010-10-23 335 1.4.1 use ib_sel
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-- 2010-10-17 333 1.4 use ibus V2 interface
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-- 2010-10-17 333 1.4 use ibus V2 interface
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-- 2010-06-20 307 1.3.7 rename cpacc to cacc in mmu_cntl_type
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-- 2010-06-20 307 1.3.7 rename cpacc to cacc in mmu_cntl_type
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-- 2009-05-30 220 1.3.6 final removal of snoopers (were already commented)
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-- 2009-05-30 220 1.3.6 final removal of snoopers (were already commented)
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-- 2009-05-09 213 1.3.5 BUGFIX: tie inst_compl permanentely '0'
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-- 2009-05-09 213 1.3.5 BUGFIX: tie inst_compl permanentely '0'
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-- 2007-05-12 26 1.0 Initial version
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-- 2007-05-12 26 1.0 Initial version
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------------------------------------------------------------------------------
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------------------------------------------------------------------------------
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library ieee;
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_1164.all;
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use ieee.std_logic_arith.all;
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use ieee.numeric_std.all;
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use work.slvtypes.all;
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use work.slvtypes.all;
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use work.iblib.all;
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use work.iblib.all;
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use work.pdp11.all;
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use work.pdp11.all;
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);
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);
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end pdp11_mmu;
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end pdp11_mmu;
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architecture syn of pdp11_mmu is
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architecture syn of pdp11_mmu is
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constant ibaddr_ssr0 : slv16 := conv_std_logic_vector(8#177572#,16);
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constant ibaddr_ssr0 : slv16 := slv(to_unsigned(8#177572#,16));
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constant ibaddr_ssr3 : slv16 := conv_std_logic_vector(8#172516#,16);
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constant ibaddr_ssr3 : slv16 := slv(to_unsigned(8#172516#,16));
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constant ssr0_ibf_abo_nonres : integer := 15;
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constant ssr0_ibf_abo_nonres : integer := 15;
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constant ssr0_ibf_abo_length : integer := 14;
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constant ssr0_ibf_abo_length : integer := 14;
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constant ssr0_ibf_abo_rdonly : integer := 13;
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constant ssr0_ibf_abo_rdonly : integer := 13;
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constant ssr0_ibf_trap_mmu : integer := 12;
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constant ssr0_ibf_trap_mmu : integer := 12;
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end process proc_ibres;
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end process proc_ibres;
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proc_ssr0 : process (CLK)
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proc_ssr0 : process (CLK)
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begin
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begin
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if CLK'event and CLK='1' then
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if rising_edge(CLK) then
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if BRESET = '1' then
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if BRESET = '1' then
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R_SSR0 <= mmu_ssr0_init;
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R_SSR0 <= mmu_ssr0_init;
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else
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else
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R_SSR0 <= N_SSR0;
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R_SSR0 <= N_SSR0;
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end if;
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end if;
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end if;
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end if;
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end process proc_ssr0;
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end process proc_ssr0;
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proc_ssr3 : process (CLK)
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proc_ssr3 : process (CLK)
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begin
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begin
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if CLK'event and CLK='1' then
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if rising_edge(CLK) then
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if BRESET = '1' then
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if BRESET = '1' then
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R_SSR3 <= mmu_ssr3_init;
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R_SSR3 <= mmu_ssr3_init;
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elsif IBSEL_SSR3='1' and IB_MREQ.we='1' then
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elsif IBSEL_SSR3='1' and IB_MREQ.we='1' then
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if IB_MREQ.be0 = '1' then
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if IB_MREQ.be0 = '1' then
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R_SSR3.ena_ubmap <= IB_MREQ.din(ssr3_ibf_ena_ubmap);
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R_SSR3.ena_ubmap <= IB_MREQ.din(ssr3_ibf_ena_ubmap);
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dspace_ok := CNTL.dspace and dspace_en;
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dspace_ok := CNTL.dspace and dspace_en;
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iasn(3) := dspace_ok;
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iasn(3) := dspace_ok;
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iasn(2 downto 0) := asf;
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iasn(2 downto 0) := asf;
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ipaddrh := unsigned("000000000"&bn) + unsigned(SARSDR.saf);
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ipaddrh := slv(unsigned("000000000"&bn) + unsigned(SARSDR.saf));
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DSPACE <= dspace_ok;
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DSPACE <= dspace_ok;
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ASN <= iasn;
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ASN <= iasn;
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PADDRH <= ipaddrh;
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PADDRH <= ipaddrh;
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