| Line 1... |
Line 1... |
-- $Id: pdp11_sequencer.vhd 314 2010-07-09 17:38:41Z mueller $
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-- $Id: pdp11_sequencer.vhd 335 2010-10-24 22:24:23Z 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 2006-2010 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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| Line 13... |
Line 13... |
--
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--
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------------------------------------------------------------------------------
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------------------------------------------------------------------------------
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-- Module Name: pdp11_sequencer - syn
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-- Module Name: pdp11_sequencer - syn
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-- Description: pdp11: CPU sequencer
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-- Description: pdp11: CPU sequencer
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--
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--
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-- Dependencies: -
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-- Dependencies: ib_sel
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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; ghdl 0.18-0.25
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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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--
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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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-- 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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-- 2010-09-18 300 1.3.2 rename (adlm)box->(oalm)unit
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-- 2010-06-20 307 1.3.1 rename cpacc to cacc in vm_cntl_type
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-- 2010-06-20 307 1.3.1 rename cpacc to cacc in vm_cntl_type
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-- 2010-06-13 305 1.3 remove CPDIN_WE, CPDOUT_WE out ports; set
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-- 2010-06-13 305 1.3 remove CPDIN_WE, CPDOUT_WE out ports; set
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-- CNTL.cpdout_we instead of CPDOUT_WE
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-- CNTL.cpdout_we instead of CPDOUT_WE
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-- 2010-06-12 304 1.2.8 signal cpuwait when spinning in s_op_wait
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-- 2010-06-12 304 1.2.8 signal cpuwait when spinning in s_op_wait
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-- 2009-05-30 220 1.2.7 final removal of snoopers (were already commented)
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-- 2009-05-30 220 1.2.7 final removal of snoopers (were already commented)
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| Line 242... |
Line 246... |
|
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signal IBSEL_CPUERR : slbit := '0';
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signal IBSEL_CPUERR : slbit := '0';
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|
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begin
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begin
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|
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proc_ibsel: process (IB_MREQ)
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SEL : ib_sel
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variable icpuerr : slbit := '0';
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generic map (
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begin
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IB_ADDR => ibaddr_cpuerr)
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icpuerr := '0';
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port map (
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if IB_MREQ.req='1' and IB_MREQ.addr=ibaddr_cpuerr(12 downto 1) then
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CLK => CLK,
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icpuerr := '1';
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IB_MREQ => IB_MREQ,
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end if;
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SEL => IBSEL_CPUERR
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IBSEL_CPUERR <= icpuerr;
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);
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IB_SRES.ack <= icpuerr;
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IB_SRES.busy <= '0';
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end process proc_ibsel;
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proc_ibdout : process (IBSEL_CPUERR, R_CPUERR)
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proc_ibres : process (IBSEL_CPUERR, IB_MREQ, R_CPUERR)
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variable cpuerrout : slv16 := (others=>'0');
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variable idout : slv16 := (others=>'0');
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begin
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begin
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cpuerrout := (others=>'0');
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idout := (others=>'0');
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if IBSEL_CPUERR = '1' then
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if IBSEL_CPUERR = '1' then
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cpuerrout(cpuerr_ibf_illhlt) := R_CPUERR.illhlt;
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idout(cpuerr_ibf_illhlt) := R_CPUERR.illhlt;
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cpuerrout(cpuerr_ibf_adderr) := R_CPUERR.adderr;
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idout(cpuerr_ibf_adderr) := R_CPUERR.adderr;
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cpuerrout(cpuerr_ibf_nxm) := R_CPUERR.nxm;
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idout(cpuerr_ibf_nxm) := R_CPUERR.nxm;
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cpuerrout(cpuerr_ibf_iobto) := R_CPUERR.iobto;
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idout(cpuerr_ibf_iobto) := R_CPUERR.iobto;
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cpuerrout(cpuerr_ibf_ysv) := R_CPUERR.ysv;
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idout(cpuerr_ibf_ysv) := R_CPUERR.ysv;
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cpuerrout(cpuerr_ibf_rsv) := R_CPUERR.rsv;
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idout(cpuerr_ibf_rsv) := R_CPUERR.rsv;
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end if;
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end if;
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IB_SRES.dout <= cpuerrout;
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IB_SRES.dout <= idout;
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end process proc_ibdout;
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IB_SRES.ack <= IBSEL_CPUERR and (IB_MREQ.re or IB_MREQ.we); -- ack all
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IB_SRES.busy <= '0';
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end process proc_ibres;
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|
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proc_status: process (CLK)
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proc_status: process (CLK)
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begin
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begin
|
if CLK'event and CLK='1' then
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if CLK'event and CLK='1' then
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if GRESET = '1' then
|
if GRESET = '1' then
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| Line 371... |
Line 374... |
nvmcntl : inout vm_cntl_type;
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nvmcntl : inout vm_cntl_type;
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wstate : in state_type;
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wstate : in state_type;
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nmmumoni : inout mmu_moni_type;
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nmmumoni : inout mmu_moni_type;
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updt_sp : in slbit := '0') is
|
updt_sp : in slbit := '0') is
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begin
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begin
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ndpcntl.abox_asel := c_abox_asel_dsrc; -- ABOX A=DSRC
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ndpcntl.ounit_asel := c_ounit_asel_dsrc; -- OUNIT A=DSRC
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ndpcntl.abox_const := "000000010"; -- ABOX const=2
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ndpcntl.ounit_const := "000000010"; -- OUNIT const=2
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ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const
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ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const
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ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
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ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
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ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
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ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
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ndpcntl.dsrc_we := '1'; -- update DSRC
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ndpcntl.dsrc_we := '1'; -- update DSRC
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if updt_sp = '1' then
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if updt_sp = '1' then
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nmmumoni.regmod := '1';
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nmmumoni.regmod := '1';
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nmmumoni.isdec := '0';
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nmmumoni.isdec := '0';
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| Line 425... |
Line 428... |
isdef : in slbit;
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isdef : in slbit;
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regnum : in slv3) is
|
regnum : in slv3) is
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begin
|
begin
|
if bytop='0' or isdef='1' or
|
if bytop='0' or isdef='1' or
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regnum=c_gpr_pc or regnum=c_gpr_sp then
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regnum=c_gpr_pc or regnum=c_gpr_sp then
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ndpcntl.abox_const := "000000010";
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ndpcntl.ounit_const := "000000010";
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else
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else
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ndpcntl.abox_const := "000000001";
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ndpcntl.ounit_const := "000000001";
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end if;
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end if;
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end procedure do_const_opsize;
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end procedure do_const_opsize;
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|
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procedure do_fork_dstr(nstate : inout state_type;
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procedure do_fork_dstr(nstate : inout state_type;
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idstat : in decode_stat_type) is
|
idstat : in decode_stat_type) is
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| Line 520... |
Line 523... |
ndpcntl : inout dpath_cntl_type;
|
ndpcntl : inout dpath_cntl_type;
|
vector : in slv9_2) is
|
vector : in slv9_2) is
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begin
|
begin
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ndpcntl.dtmp_sel := c_dpath_dtmp_psw; -- DTMP = PSW
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ndpcntl.dtmp_sel := c_dpath_dtmp_psw; -- DTMP = PSW
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ndpcntl.dtmp_we := '1';
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ndpcntl.dtmp_we := '1';
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ndpcntl.abox_azero := '1'; -- ABOX A = 0
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ndpcntl.ounit_azero := '1'; -- OUNIT A = 0
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ndpcntl.abox_const := vector & "00"; -- vector
|
ndpcntl.ounit_const := vector & "00"; -- vector
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ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(vector)
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ndpcntl.ounit_bsel := c_ounit_bsel_const;-- OUNIT B=const(vector)
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ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
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ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
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ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
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ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
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ndpcntl.dsrc_we := '1'; -- DSRC = vector
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ndpcntl.dsrc_we := '1'; -- DSRC = vector
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nstate := s_int_getpc;
|
nstate := s_int_getpc;
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end procedure do_start_int;
|
end procedure do_start_int;
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|
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| Line 543... |
Line 546... |
nbreset := '0';
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nbreset := '0';
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nintack := '0';
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nintack := '0';
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|
|
nidstat := R_IDSTAT;
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nidstat := R_IDSTAT;
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|
|
if IB_MREQ.we='1' and IBSEL_CPUERR='1' then -- write to CPUERR clears it !!
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if IBSEL_CPUERR='1' and IB_MREQ.we='1' then -- write to CPUERR clears it !
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ncpuerr := cpuerr_init;
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ncpuerr := cpuerr_init;
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end if;
|
end if;
|
|
|
int_pending := '0';
|
int_pending := '0';
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if unsigned(INT_PRI) > unsigned(PSW.pri) then
|
if unsigned(INT_PRI) > unsigned(PSW.pri) then
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| Line 601... |
Line 604... |
ndpcntl.ddst_sel := c_dpath_ddst_dst;
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ndpcntl.ddst_sel := c_dpath_ddst_dst;
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ndpcntl.ddst_we := '0';
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ndpcntl.ddst_we := '0';
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ndpcntl.dtmp_sel := c_dpath_dtmp_dsrc;
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ndpcntl.dtmp_sel := c_dpath_dtmp_dsrc;
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ndpcntl.dtmp_we := '0';
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ndpcntl.dtmp_we := '0';
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|
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ndpcntl.abox_asel := c_abox_asel_ddst;
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ndpcntl.ounit_asel := c_ounit_asel_ddst;
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ndpcntl.abox_azero := '0'; -- DEFAULT
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ndpcntl.ounit_azero := '0'; -- DEFAULT
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ndpcntl.abox_const := (others=>'0'); -- DEFAULT
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ndpcntl.ounit_const := (others=>'0'); -- DEFAULT
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ndpcntl.abox_bsel := c_abox_bsel_const;
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ndpcntl.ounit_bsel := c_ounit_bsel_const;
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ndpcntl.abox_opsub := '0'; -- DEFAULT
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ndpcntl.ounit_opsub := '0'; -- DEFAULT
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|
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ndpcntl.dbox_srcmod := R_IDSTAT.dbox_srcmod; -- STATIC
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ndpcntl.aunit_srcmod := R_IDSTAT.aunit_srcmod; -- STATIC
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ndpcntl.dbox_dstmod := R_IDSTAT.dbox_dstmod; -- STATIC
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ndpcntl.aunit_dstmod := R_IDSTAT.aunit_dstmod; -- STATIC
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ndpcntl.dbox_cimod := R_IDSTAT.dbox_cimod; -- STATIC
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ndpcntl.aunit_cimod := R_IDSTAT.aunit_cimod; -- STATIC
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ndpcntl.dbox_cc1op := R_IDSTAT.dbox_cc1op; -- STATIC
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ndpcntl.aunit_cc1op := R_IDSTAT.aunit_cc1op; -- STATIC
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ndpcntl.dbox_ccmode := R_IDSTAT.dbox_ccmode; -- STATIC
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ndpcntl.aunit_ccmode := R_IDSTAT.aunit_ccmode; -- STATIC
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ndpcntl.dbox_bytop := R_IDSTAT.is_bytop; -- STATIC
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ndpcntl.aunit_bytop := R_IDSTAT.is_bytop; -- STATIC
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|
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ndpcntl.lbox_func := R_IDSTAT.lbox_func; -- STATIC
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ndpcntl.lunit_func := R_IDSTAT.lunit_func; -- STATIC
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ndpcntl.lbox_bytop := R_IDSTAT.is_bytop; -- STATIC
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ndpcntl.lunit_bytop := R_IDSTAT.is_bytop; -- STATIC
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|
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ndpcntl.mbox_func := R_IDSTAT.mbox_func; -- STATIC
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ndpcntl.munit_func := R_IDSTAT.munit_func; -- STATIC
|
|
|
ndpcntl.ireg_we := '0';
|
ndpcntl.ireg_we := '0';
|
|
|
ndpcntl.cres_sel := R_IDSTAT.res_sel; -- DEFAULT
|
ndpcntl.cres_sel := R_IDSTAT.res_sel; -- DEFAULT
|
ndpcntl.dres_sel := c_dpath_res_abox;
|
ndpcntl.dres_sel := c_dpath_res_ounit;
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_dsrc;
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_dsrc;
|
|
|
if CP_CNTL.req='1' and R_STATUS.cmdbusy='0' then
|
if CP_CNTL.req='1' and R_STATUS.cmdbusy='0' then
|
nstatus.cmdbusy := '1';
|
nstatus.cmdbusy := '1';
|
nstatus.cpfunc := CP_CNTL.func;
|
nstatus.cpfunc := CP_CNTL.func;
|
| Line 764... |
Line 767... |
end if;
|
end if;
|
|
|
end if;
|
end if;
|
|
|
when s_cp_regread =>
|
when s_cp_regread =>
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A = DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A = DDST
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B = const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B = const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
nstatus.cmdack := '1';
|
nstatus.cmdack := '1';
|
nstate := s_idle;
|
nstate := s_idle;
|
|
|
when s_cp_rps =>
|
when s_cp_rps =>
|
ndpcntl.abox_asel := c_abox_asel_dtmp; -- ABOX A = DTMP
|
ndpcntl.ounit_asel := c_ounit_asel_dtmp; -- OUNIT A = DTMP
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B = const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B = const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
nstatus.cmdack := '1';
|
nstatus.cmdack := '1';
|
nstate := s_idle;
|
nstate := s_idle;
|
|
|
when s_cp_memr_w =>
|
when s_cp_memr_w =>
|
nstate := s_cp_memr_w;
|
nstate := s_cp_memr_w;
|
| Line 939... |
Line 942... |
do_fork_opg(nstate, R_IDSTAT);
|
do_fork_opg(nstate, R_IDSTAT);
|
end if;
|
end if;
|
end if;
|
end if;
|
|
|
when s_srcr_inc =>
|
when s_srcr_inc =>
|
ndpcntl.abox_asel := c_abox_asel_dsrc; -- ABOX A=DSRC
|
ndpcntl.ounit_asel := c_ounit_asel_dsrc; -- OUNIT A=DSRC
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, SRCDEF, SRCREG);
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, SRCDEF, SRCREG);
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := SRCREG;
|
ndpcntl.gpr_adst := SRCREG;
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.isdec := '0';
|
nmmumoni.isdec := '0';
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES (for if)
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES (for if)
|
| Line 975... |
Line 978... |
end if;
|
end if;
|
end if;
|
end if;
|
end if;
|
end if;
|
|
|
when s_srcr_dec =>
|
when s_srcr_dec =>
|
ndpcntl.abox_asel := c_abox_asel_dsrc; -- ABOX A=DSRC
|
ndpcntl.ounit_asel := c_ounit_asel_dsrc; -- OUNIT A=DSRC
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, SRCDEF, SRCREG);
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, SRCDEF, SRCREG);
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const
|
ndpcntl.ounit_bsel := c_ounit_bsel_const;-- OUNIT B=const
|
ndpcntl.abox_opsub := '1'; -- ABOX = A-B
|
ndpcntl.ounit_opsub := '1'; -- OUNIT = A-B
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
ndpcntl.gpr_adst := SRCREG;
|
ndpcntl.gpr_adst := SRCREG;
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.regmod := '1';
|
| Line 1003... |
Line 1006... |
do_memread_i(nstate, ndpcntl, nvmcntl, s_srcr_ind1_w);
|
do_memread_i(nstate, ndpcntl, nvmcntl, s_srcr_ind1_w);
|
|
|
when s_srcr_ind1_w =>
|
when s_srcr_ind1_w =>
|
nstate := s_srcr_ind1_w;
|
nstate := s_srcr_ind1_w;
|
if R_IDSTAT.is_srcpc = '0' then
|
if R_IDSTAT.is_srcpc = '0' then
|
ndpcntl.abox_asel := c_abox_asel_dsrc; -- ABOX A = DSRC
|
ndpcntl.ounit_asel := c_ounit_asel_dsrc; -- OUNIT A = DSRC
|
else
|
else
|
ndpcntl.abox_asel := c_abox_asel_pc; -- ABOX A = PC (for nn(pc))
|
ndpcntl.ounit_asel := c_ounit_asel_pc; -- OUNIT A = PC (for nn(pc))
|
end if;
|
end if;
|
ndpcntl.abox_bsel := c_abox_bsel_vmdout; -- ABOX B = VMDOUT
|
ndpcntl.ounit_bsel := c_ounit_bsel_vmdout; -- OUNIT B = VMDOUT
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.ddst_sel := c_dpath_ddst_dst; -- DDST = R(DST)
|
ndpcntl.ddst_sel := c_dpath_ddst_dst; -- DDST = R(DST)
|
do_memcheck(nstate, nstatus, imemok);
|
do_memcheck(nstate, nstatus, imemok);
|
if imemok then
|
if imemok then
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
| Line 1099... |
Line 1102... |
ndpcntl.ddst_we := '1'; -- update DDST
|
ndpcntl.ddst_we := '1'; -- update DDST
|
do_fork_opg(nstate, R_IDSTAT);
|
do_fork_opg(nstate, R_IDSTAT);
|
end if;
|
end if;
|
|
|
when s_dstr_inc =>
|
when s_dstr_inc =>
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, DSTDEF, DSTREG);
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, DSTDEF, DSTREG);
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const
|
ndpcntl.ounit_bsel := c_ounit_bsel_const;-- OUNIT B=const
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.isdec := '0';
|
nmmumoni.isdec := '0';
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_ddst; -- VA = DDST
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_ddst; -- VA = DDST
|
| Line 1128... |
Line 1131... |
do_fork_opg(nstate, R_IDSTAT);
|
do_fork_opg(nstate, R_IDSTAT);
|
end if;
|
end if;
|
end if;
|
end if;
|
|
|
when s_dstr_dec =>
|
when s_dstr_dec =>
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, DSTDEF, DSTREG);
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, DSTDEF, DSTREG);
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const
|
ndpcntl.ounit_bsel := c_ounit_bsel_const;-- OUNIT B=const
|
ndpcntl.abox_opsub := '1'; -- ABOX = A-B
|
ndpcntl.ounit_opsub := '1'; -- OUNIT = A-B
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
ndpcntl.ddst_we := '1'; -- update DDST
|
ndpcntl.ddst_we := '1'; -- update DDST
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.regmod := '1';
|
| Line 1154... |
Line 1157... |
do_memread_i(nstate, ndpcntl, nvmcntl, s_dstr_ind1_w);
|
do_memread_i(nstate, ndpcntl, nvmcntl, s_dstr_ind1_w);
|
|
|
when s_dstr_ind1_w =>
|
when s_dstr_ind1_w =>
|
nstate := s_dstr_ind1_w;
|
nstate := s_dstr_ind1_w;
|
if R_IDSTAT.is_dstpc = '0' then
|
if R_IDSTAT.is_dstpc = '0' then
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A = DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A = DDST
|
else
|
else
|
ndpcntl.abox_asel := c_abox_asel_pc; -- ABOX A = PC (for nn(pc))
|
ndpcntl.ounit_asel := c_ounit_asel_pc; -- OUNIT A = PC (for nn(pc))
|
end if;
|
end if;
|
ndpcntl.abox_bsel := c_abox_bsel_vmdout; -- ABOX B = VMDOUT
|
ndpcntl.ounit_bsel := c_ounit_bsel_vmdout;-- OUNIT B = VMDOUT
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
do_memcheck(nstate, nstatus, imemok);
|
do_memcheck(nstate, nstatus, imemok);
|
if imemok then
|
if imemok then
|
ndpcntl.ddst_we := '1'; -- update DDST
|
ndpcntl.ddst_we := '1'; -- update DDST
|
nstate := s_dstr_ind2;
|
nstate := s_dstr_ind2;
|
| Line 1247... |
Line 1250... |
end if;
|
end if;
|
|
|
when s_dstw_inc =>
|
when s_dstw_inc =>
|
ndpcntl.psr_ccwe := '1';
|
ndpcntl.psr_ccwe := '1';
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_ddst; -- VA = DDST
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_ddst; -- VA = DDST
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST (for else)
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST (for else)
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, DSTDEF, DSTREG); --(...)
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, DSTDEF, DSTREG); --(...)
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const (for else)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const (for else)
|
if DSTDEF = '0' then
|
if DSTDEF = '0' then
|
ndpcntl.dres_sel := R_IDSTAT.res_sel; -- DRES = choice of idec
|
ndpcntl.dres_sel := R_IDSTAT.res_sel; -- DRES = choice of idec
|
nvmcntl.kstack := is_dstkstack1246;
|
nvmcntl.kstack := is_dstkstack1246;
|
do_memwrite(nstate, nvmcntl, s_dstw_inc_w);
|
do_memwrite(nstate, nvmcntl, s_dstw_inc_w);
|
nstatus.do_gprwe := '1';
|
nstatus.do_gprwe := '1';
|
else
|
else
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.isdec := '0';
|
nmmumoni.isdec := '0';
|
do_memread_d(nstate, nvmcntl, s_dstw_incdef_w,
|
do_memread_d(nstate, nvmcntl, s_dstw_incdef_w,
|
is_pci=>R_IDSTAT.is_dstpc);
|
is_pci=>R_IDSTAT.is_dstpc);
|
end if;
|
end if;
|
|
|
when s_dstw_inc_w =>
|
when s_dstw_inc_w =>
|
nstate := s_dstw_inc_w;
|
nstate := s_dstw_inc_w;
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, DSTDEF, DSTREG);
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, DSTDEF, DSTREG);
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_adst := DSTREG;
|
if R_STATUS.do_gprwe = '1' then
|
if R_STATUS.do_gprwe = '1' then
|
nmmumoni.regmod := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.isdec := '0';
|
nmmumoni.isdec := '0';
|
nmmumoni.trace_prev := '1'; -- ssr freeze of prev state
|
nmmumoni.trace_prev := '1'; -- ssr freeze of prev state
|
| Line 1296... |
Line 1299... |
nstate := s_dstw_def246;
|
nstate := s_dstw_def246;
|
end if;
|
end if;
|
|
|
when s_dstw_dec =>
|
when s_dstw_dec =>
|
ndpcntl.psr_ccwe := '1';
|
ndpcntl.psr_ccwe := '1';
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, DSTDEF, DSTREG);
|
do_const_opsize(ndpcntl, R_IDSTAT.is_bytop, DSTDEF, DSTREG);
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const
|
ndpcntl.ounit_bsel := c_ounit_bsel_const;-- OUNIT B=const
|
ndpcntl.abox_opsub := '1'; -- ABOX = A-B
|
ndpcntl.ounit_opsub := '1'; -- OUNIT = A-B
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
ndpcntl.ddst_we := '1'; -- update DDST
|
ndpcntl.ddst_we := '1'; -- update DDST
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.regmod := '1';
|
| Line 1326... |
Line 1329... |
do_memread_i(nstate, ndpcntl, nvmcntl, s_dstw_ind_w);
|
do_memread_i(nstate, ndpcntl, nvmcntl, s_dstw_ind_w);
|
|
|
when s_dstw_ind_w =>
|
when s_dstw_ind_w =>
|
nstate := s_dstw_ind_w;
|
nstate := s_dstw_ind_w;
|
if R_IDSTAT.is_dstpc = '0' then
|
if R_IDSTAT.is_dstpc = '0' then
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A = DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A = DDST
|
else
|
else
|
ndpcntl.abox_asel := c_abox_asel_pc; -- ABOX A = PC (for nn(pc))
|
ndpcntl.ounit_asel := c_ounit_asel_pc; -- OUNIT A = PC (for nn(pc))
|
end if;
|
end if;
|
ndpcntl.abox_bsel := c_abox_bsel_vmdout; -- ABOX B = VMDOUT
|
ndpcntl.ounit_bsel := c_ounit_bsel_vmdout;-- OUNIT B = VMDOUT
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
do_memcheck(nstate, nstatus, imemok);
|
do_memcheck(nstate, nstatus, imemok);
|
if imemok then
|
if imemok then
|
ndpcntl.ddst_we := '1'; -- update DDST
|
ndpcntl.ddst_we := '1'; -- update DDST
|
nstate := s_dstw_dec1;
|
nstate := s_dstw_dec1;
|
| Line 1376... |
Line 1379... |
-- s_dsta_dec1 req n(r)
|
-- s_dsta_dec1 req n(r)
|
-- s_dsta_incdef_w get n(r)
|
-- s_dsta_incdef_w get n(r)
|
-- -> do_fork_opa
|
-- -> do_fork_opa
|
|
|
when s_dsta_inc =>
|
when s_dsta_inc =>
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
ndpcntl.abox_const := "000000010";
|
ndpcntl.ounit_const := "000000010";
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(2)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(2)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.isdec := '0';
|
nmmumoni.isdec := '0';
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES (for if)
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES (for if)
|
| Line 1407... |
Line 1410... |
ndpcntl.ddst_we := '1'; -- update DDST
|
ndpcntl.ddst_we := '1'; -- update DDST
|
do_fork_opa(nstate, R_IDSTAT);
|
do_fork_opa(nstate, R_IDSTAT);
|
end if;
|
end if;
|
|
|
when s_dsta_dec =>
|
when s_dsta_dec =>
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
ndpcntl.abox_const := "000000010";
|
ndpcntl.ounit_const := "000000010";
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(2)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const;-- OUNIT B=const(2)
|
ndpcntl.abox_opsub := '1'; -- ABOX = A-B
|
ndpcntl.ounit_opsub := '1'; -- OUNIT = A-B
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
ndpcntl.ddst_we := '1'; -- update DDST
|
ndpcntl.ddst_we := '1'; -- update DDST
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_adst := DSTREG;
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.regmod := '1';
|
| Line 1438... |
Line 1441... |
do_memread_i(nstate, ndpcntl, nvmcntl, s_dsta_ind_w);
|
do_memread_i(nstate, ndpcntl, nvmcntl, s_dsta_ind_w);
|
|
|
when s_dsta_ind_w =>
|
when s_dsta_ind_w =>
|
nstate := s_dsta_ind_w;
|
nstate := s_dsta_ind_w;
|
if R_IDSTAT.is_dstpc = '0' then
|
if R_IDSTAT.is_dstpc = '0' then
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A = DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A = DDST
|
else
|
else
|
ndpcntl.abox_asel := c_abox_asel_pc; -- ABOX A = PC (for nn(pc))
|
ndpcntl.ounit_asel := c_ounit_asel_pc; -- OUNIT A = PC (for nn(pc))
|
end if;
|
end if;
|
ndpcntl.abox_bsel := c_abox_bsel_vmdout; -- ABOX B = VMDOUT
|
ndpcntl.ounit_bsel := c_ounit_bsel_vmdout;-- OUNIT B = VMDOUT
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
ndpcntl.ddst_sel := c_dpath_ddst_res; -- DDST = DRES
|
do_memcheck(nstate, nstatus, imemok);
|
do_memcheck(nstate, nstatus, imemok);
|
if imemok then
|
if imemok then
|
ndpcntl.ddst_we := '1'; -- update DDST
|
ndpcntl.ddst_we := '1'; -- update DDST
|
nstate := s_dsta_dec1;
|
nstate := s_dsta_dec1;
|
| Line 1490... |
Line 1493... |
nbreset := '1';
|
nbreset := '1';
|
end if;
|
end if;
|
nstate := s_idle;
|
nstate := s_idle;
|
|
|
when s_op_rts => -- RTS
|
when s_op_rts => -- RTS
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_we := '1'; -- load PC with reg(dst)
|
ndpcntl.gpr_we := '1'; -- load PC with reg(dst)
|
nstate := s_op_rts_pop;
|
nstate := s_op_rts_pop;
|
|
|
when s_op_rts_pop =>
|
when s_op_rts_pop =>
|
| Line 1532... |
Line 1535... |
do_fork_next(nstate, nstatus, nmmumoni);
|
do_fork_next(nstate, nstatus, nmmumoni);
|
|
|
when s_op_br => -- BR
|
when s_op_br => -- BR
|
nvmcntl.dspace := '0'; -- prepare do_fork_next_pref
|
nvmcntl.dspace := '0'; -- prepare do_fork_next_pref
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_pc; -- VA = PC
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_pc; -- VA = PC
|
ndpcntl.abox_asel := c_abox_asel_pc; -- ABOX A = PC
|
ndpcntl.ounit_asel := c_ounit_asel_pc; -- OUNIT A = PC
|
ndpcntl.abox_bsel := c_abox_bsel_ireg8; -- ABOX B = IREG8
|
ndpcntl.ounit_bsel := c_ounit_bsel_ireg8;-- OUNIT B = IREG8
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
-- note: cc are NZVC
|
-- note: cc are NZVC
|
case brcode(3 downto 1) is
|
case brcode(3 downto 1) is
|
when "000" => -- BR
|
when "000" => -- BR
|
brcond := '1';
|
brcond := '1';
|
when "001" => -- BNE/BEQ: if Z = x
|
when "001" => -- BNE/BEQ: if Z = x
|
| Line 1565... |
Line 1568... |
else
|
else
|
do_fork_next_pref(nstate, nstatus, ndpcntl, nvmcntl, nmmumoni);
|
do_fork_next_pref(nstate, nstatus, ndpcntl, nvmcntl, nmmumoni);
|
end if;
|
end if;
|
|
|
when s_op_mark => -- MARK
|
when s_op_mark => -- MARK
|
ndpcntl.abox_asel := c_abox_asel_pc; -- ABOX A = PC
|
ndpcntl.ounit_asel := c_ounit_asel_pc; -- OUNIT A = PC
|
ndpcntl.abox_bsel := c_abox_bsel_ireg6; -- ABOX B = IREG6
|
ndpcntl.ounit_bsel := c_ounit_bsel_ireg6;-- OUNIT B = IREG6
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_we := '1'; -- update DSRC (with PC+2*nn)
|
ndpcntl.dsrc_we := '1'; -- update DSRC (with PC+2*nn)
|
ndpcntl.gpr_adst := c_gpr_r5; -- fetch r5
|
ndpcntl.gpr_adst := c_gpr_r5; -- fetch r5
|
ndpcntl.ddst_sel := c_dpath_ddst_dst;
|
ndpcntl.ddst_sel := c_dpath_ddst_dst;
|
ndpcntl.ddst_we := '1';
|
ndpcntl.ddst_we := '1';
|
nstate := s_op_mark1;
|
nstate := s_op_mark1;
|
|
|
when s_op_mark1 =>
|
when s_op_mark1 =>
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A = DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A = DDST
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B = const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const;-- OUNIT B = const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_we := '1'; -- load PC with r5
|
ndpcntl.gpr_we := '1'; -- load PC with r5
|
nstate := s_op_mark_pop;
|
nstate := s_op_mark_pop;
|
|
|
when s_op_mark_pop =>
|
when s_op_mark_pop =>
|
| Line 1613... |
Line 1616... |
--do_fork_next_pref(nstate, ndpcntl, nvmcntl, nmmumoni);
|
--do_fork_next_pref(nstate, ndpcntl, nvmcntl, nmmumoni);
|
do_fork_next(nstate, nstatus, nmmumoni);
|
do_fork_next(nstate, nstatus, nmmumoni);
|
end if;
|
end if;
|
|
|
when s_op_sob1 => -- SOB (br)
|
when s_op_sob1 => -- SOB (br)
|
ndpcntl.abox_asel := c_abox_asel_pc; -- ABOX A = PC
|
ndpcntl.ounit_asel := c_ounit_asel_pc; -- OUNIT A = PC
|
ndpcntl.abox_bsel := c_abox_bsel_ireg6; -- ABOX B = IREG6
|
ndpcntl.ounit_bsel := c_ounit_bsel_ireg6;-- OUNIT B = IREG6
|
ndpcntl.abox_opsub := '1'; -- ABOX = A - B
|
ndpcntl.ounit_opsub := '1'; -- OUNIT = A - B
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
do_fork_next(nstate, nstatus, nmmumoni);
|
do_fork_next(nstate, nstatus, nmmumoni);
|
|
|
when s_opg_gen =>
|
when s_opg_gen =>
|
| Line 1675... |
Line 1678... |
ndpcntl.dtmp_sel := c_dpath_dtmp_drese; -- DTMP = DRESE
|
ndpcntl.dtmp_sel := c_dpath_dtmp_drese; -- DTMP = DRESE
|
ndpcntl.dtmp_we := '1'; -- capture low order part
|
ndpcntl.dtmp_we := '1'; -- capture low order part
|
nstate := s_opg_mul1;
|
nstate := s_opg_mul1;
|
|
|
when s_opg_mul1 => -- MUL (write odd reg)
|
when s_opg_mul1 => -- MUL (write odd reg)
|
ndpcntl.abox_asel := c_abox_asel_dtmp; -- ABOX A = DTMP
|
ndpcntl.ounit_asel := c_ounit_asel_dtmp; -- OUNIT A = DTMP
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B = const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const;-- OUNIT B = const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := SRCREG(2 downto 1) & "1";-- write odd reg !
|
ndpcntl.gpr_adst := SRCREG(2 downto 1) & "1";-- write odd reg !
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
ndpcntl.psr_ccwe := '1';
|
ndpcntl.psr_ccwe := '1';
|
do_fork_next(nstate, nstatus, nmmumoni);
|
do_fork_next(nstate, nstatus, nmmumoni);
|
|
|
when s_opg_div => -- DIV (load dd_low)
|
when s_opg_div => -- DIV (load dd_low)
|
ndpcntl.mbox_s_div := '1';
|
ndpcntl.munit_s_div := '1';
|
ndpcntl.gpr_asrc := SRCREG(2 downto 1) & "1";-- read odd reg !
|
ndpcntl.gpr_asrc := SRCREG(2 downto 1) & "1";-- read odd reg !
|
ndpcntl.dtmp_sel := c_dpath_dtmp_dsrc;
|
ndpcntl.dtmp_sel := c_dpath_dtmp_dsrc;
|
ndpcntl.dtmp_we := '1';
|
ndpcntl.dtmp_we := '1';
|
nstate := s_opg_div_cn;
|
nstate := s_opg_div_cn;
|
|
|
when s_opg_div_cn => -- DIV (1st...16th cycle)
|
when s_opg_div_cn => -- DIV (1st...16th cycle)
|
ndpcntl.mbox_s_div_cn := '1';
|
ndpcntl.munit_s_div_cn := '1';
|
ndpcntl.dres_sel := R_IDSTAT.res_sel; -- DRES = choice of idec
|
ndpcntl.dres_sel := R_IDSTAT.res_sel; -- DRES = choice of idec
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dtmp_sel := c_dpath_dtmp_drese; -- DTMP = DRESE
|
ndpcntl.dtmp_sel := c_dpath_dtmp_drese; -- DTMP = DRESE
|
nstate := s_opg_div_cn;
|
nstate := s_opg_div_cn;
|
if DP_STAT.div_zero='1' or DP_STAT.div_ovfl='1' then
|
if DP_STAT.div_zero='1' or DP_STAT.div_ovfl='1' then
|
| Line 1707... |
Line 1710... |
if DP_STAT.shc_tc = '1' then
|
if DP_STAT.shc_tc = '1' then
|
nstate := s_opg_div_cr;
|
nstate := s_opg_div_cr;
|
end if;
|
end if;
|
|
|
when s_opg_div_cr => -- DIV (reminder correction)
|
when s_opg_div_cr => -- DIV (reminder correction)
|
ndpcntl.mbox_s_div_cr := '1';
|
ndpcntl.munit_s_div_cr := '1';
|
ndpcntl.dres_sel := R_IDSTAT.res_sel; -- DRES = choice of idec
|
ndpcntl.dres_sel := R_IDSTAT.res_sel; -- DRES = choice of idec
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_we := DP_STAT.div_cr; -- update DSRC
|
ndpcntl.dsrc_we := DP_STAT.div_cr; -- update DSRC
|
nstate := s_opg_div_sq;
|
nstate := s_opg_div_sq;
|
|
|
when s_opg_div_sq => -- DIV (store quotient)
|
when s_opg_div_sq => -- DIV (store quotient)
|
ndpcntl.abox_asel := c_abox_asel_dtmp; -- ABOX A=DTMP
|
ndpcntl.ounit_asel := c_ounit_asel_dtmp; -- OUNIT A=DTMP
|
ndpcntl.abox_const := "00000000"&DP_STAT.div_cq;-- ABOX const = Q corr.
|
ndpcntl.ounit_const := "00000000"&DP_STAT.div_cq;-- OUNIT const = Q corr.
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const (q cor)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const (q cor)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := SRCREG; -- write result
|
ndpcntl.gpr_adst := SRCREG; -- write result
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
ndpcntl.dtmp_sel := c_dpath_dtmp_dres; -- DTMP = DRES
|
ndpcntl.dtmp_sel := c_dpath_dtmp_dres; -- DTMP = DRES
|
ndpcntl.dtmp_we := '1'; -- update DTMP (Q)
|
ndpcntl.dtmp_we := '1'; -- update DTMP (Q)
|
nstate := s_opg_div_sr;
|
nstate := s_opg_div_sr;
|
|
|
when s_opg_div_sr => -- DIV (store reminder)
|
when s_opg_div_sr => -- DIV (store reminder)
|
ndpcntl.abox_asel := c_abox_asel_dsrc; -- ABOX A=DSRC
|
ndpcntl.ounit_asel := c_ounit_asel_dsrc; -- OUNIT A=DSRC
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const (0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const (0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := SRCREG(2 downto 1) & "1";-- write odd reg !
|
ndpcntl.gpr_adst := SRCREG(2 downto 1) & "1";-- write odd reg !
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
ndpcntl.psr_ccwe := '1';
|
ndpcntl.psr_ccwe := '1';
|
do_fork_next(nstate, nstatus, nmmumoni);
|
do_fork_next(nstate, nstatus, nmmumoni);
|
|
|
when s_opg_div_zero => -- DIV (/0 or 0/ abort)
|
when s_opg_div_zero => -- DIV (/0 or 0/ abort)
|
ndpcntl.psr_ccwe := '1';
|
ndpcntl.psr_ccwe := '1';
|
do_fork_next(nstate, nstatus, nmmumoni);
|
do_fork_next(nstate, nstatus, nmmumoni);
|
|
|
when s_opg_ash => -- ASH (load shc)
|
when s_opg_ash => -- ASH (load shc)
|
ndpcntl.mbox_s_ash := '1';
|
ndpcntl.munit_s_ash := '1';
|
nstate := s_opg_ash_cn;
|
nstate := s_opg_ash_cn;
|
|
|
when s_opg_ash_cn => -- ASH (shift cycles)
|
when s_opg_ash_cn => -- ASH (shift cycles)
|
nvmcntl.dspace := '0'; -- prepare do_fork_next_pref
|
nvmcntl.dspace := '0'; -- prepare do_fork_next_pref
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.abox_asel := c_abox_asel_dsrc; -- ABOX A=DSRC
|
ndpcntl.ounit_asel := c_ounit_asel_dsrc; -- OUNIT A=DSRC
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(0)
|
ndpcntl.gpr_adst := SRCREG; -- write result
|
ndpcntl.gpr_adst := SRCREG; -- write result
|
ndpcntl.mbox_s_ash_cn := '1';
|
ndpcntl.munit_s_ash_cn := '1';
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_pc; -- VA = PC
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_pc; -- VA = PC
|
nstate := s_opg_ash_cn;
|
nstate := s_opg_ash_cn;
|
if DP_STAT.shc_tc = '0' then
|
if DP_STAT.shc_tc = '0' then
|
ndpcntl.dres_sel := R_IDSTAT.res_sel; -- DRES = choice of idec
|
ndpcntl.dres_sel := R_IDSTAT.res_sel; -- DRES = choice of idec
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
else
|
else
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
ndpcntl.psr_ccwe := '1';
|
ndpcntl.psr_ccwe := '1';
|
do_fork_next_pref(nstate, nstatus, ndpcntl, nvmcntl, nmmumoni);
|
do_fork_next_pref(nstate, nstatus, ndpcntl, nvmcntl, nmmumoni);
|
end if;
|
end if;
|
|
|
when s_opg_ashc => -- ASHC (load low, load shc)
|
when s_opg_ashc => -- ASHC (load low, load shc)
|
ndpcntl.gpr_asrc := SRCREG(2 downto 1) & "1";-- read odd reg !
|
ndpcntl.gpr_asrc := SRCREG(2 downto 1) & "1";-- read odd reg !
|
ndpcntl.dtmp_sel := c_dpath_dtmp_dsrc;
|
ndpcntl.dtmp_sel := c_dpath_dtmp_dsrc;
|
ndpcntl.dtmp_we := '1';
|
ndpcntl.dtmp_we := '1';
|
ndpcntl.mbox_s_ashc := '1';
|
ndpcntl.munit_s_ashc := '1';
|
nstate := s_opg_ashc_cn;
|
nstate := s_opg_ashc_cn;
|
|
|
when s_opg_ashc_cn => -- ASHC (shift cycles)
|
when s_opg_ashc_cn => -- ASHC (shift cycles)
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dtmp_sel := c_dpath_dtmp_drese; -- DTMP = DRESE
|
ndpcntl.dtmp_sel := c_dpath_dtmp_drese; -- DTMP = DRESE
|
ndpcntl.abox_asel := c_abox_asel_dsrc; -- ABOX A=DSRC
|
ndpcntl.ounit_asel := c_ounit_asel_dsrc; -- OUNIT A=DSRC
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(0)
|
ndpcntl.gpr_adst := SRCREG; -- write result
|
ndpcntl.gpr_adst := SRCREG; -- write result
|
ndpcntl.mbox_s_ashc_cn := '1';
|
ndpcntl.munit_s_ashc_cn := '1';
|
nstate := s_opg_ashc_cn;
|
nstate := s_opg_ashc_cn;
|
if DP_STAT.shc_tc = '0' then
|
if DP_STAT.shc_tc = '0' then
|
ndpcntl.dres_sel := R_IDSTAT.res_sel; -- DRES = choice of idec
|
ndpcntl.dres_sel := R_IDSTAT.res_sel; -- DRES = choice of idec
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
ndpcntl.dtmp_we := '1'; -- update DTMP
|
ndpcntl.dtmp_we := '1'; -- update DTMP
|
else
|
else
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
ndpcntl.psr_ccwe := '1';
|
ndpcntl.psr_ccwe := '1';
|
nstate := s_opg_ashc_wl;
|
nstate := s_opg_ashc_wl;
|
end if;
|
end if;
|
|
|
when s_opg_ashc_wl => -- ASHC (write low)
|
when s_opg_ashc_wl => -- ASHC (write low)
|
ndpcntl.abox_asel := c_abox_asel_dtmp; -- ABOX A = DTMP
|
ndpcntl.ounit_asel := c_ounit_asel_dtmp; -- OUNIT A = DTMP
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B = const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const;-- OUNIT B = const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := SRCREG(2 downto 1) & "1";-- write odd reg !
|
ndpcntl.gpr_adst := SRCREG(2 downto 1) & "1";-- write odd reg !
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
do_fork_next(nstate, nstatus, nmmumoni);
|
do_fork_next(nstate, nstatus, nmmumoni);
|
|
|
-- dsta mode operations -----------------------------------------------------
|
-- dsta mode operations -----------------------------------------------------
|
| Line 1811... |
Line 1814... |
when s_opa_jsr1 =>
|
when s_opa_jsr1 =>
|
ndpcntl.gpr_asrc := SRCREG;
|
ndpcntl.gpr_asrc := SRCREG;
|
ndpcntl.dtmp_sel := c_dpath_dtmp_dsrc; -- DTMP = regfile
|
ndpcntl.dtmp_sel := c_dpath_dtmp_dsrc; -- DTMP = regfile
|
ndpcntl.dtmp_we := '1';
|
ndpcntl.dtmp_we := '1';
|
|
|
ndpcntl.abox_asel := c_abox_asel_dsrc; -- ABOX A=DSRC
|
ndpcntl.ounit_asel := c_ounit_asel_dsrc; -- OUNIT A=DSRC
|
ndpcntl.abox_const := "000000010";
|
ndpcntl.ounit_const := "000000010";
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(2)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(2)
|
ndpcntl.abox_opsub := '1'; -- ABOX = A-B
|
ndpcntl.ounit_opsub := '1'; -- OUNIT = A-B
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DDST = DRES
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DDST = DRES
|
ndpcntl.dsrc_we := '1'; -- update DDST
|
ndpcntl.dsrc_we := '1'; -- update DDST
|
ndpcntl.gpr_adst := c_gpr_sp;
|
ndpcntl.gpr_adst := c_gpr_sp;
|
ndpcntl.gpr_we := '1'; -- update SP
|
ndpcntl.gpr_we := '1'; -- update SP
|
nmmumoni.regmod := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.isdec := '1';
|
nmmumoni.isdec := '1';
|
nstate := s_opa_jsr_push;
|
nstate := s_opa_jsr_push;
|
|
|
when s_opa_jsr_push =>
|
when s_opa_jsr_push =>
|
ndpcntl.abox_asel := c_abox_asel_dtmp; -- ABOX A=DTMP
|
ndpcntl.ounit_asel := c_ounit_asel_dtmp; -- OUNIT A=DTMP
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_dsrc; -- VA = DSRC
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_dsrc; -- VA = DSRC
|
nvmcntl.dspace := '1';
|
nvmcntl.dspace := '1';
|
nvmcntl.kstack := is_kmode;
|
nvmcntl.kstack := is_kmode;
|
nvmcntl.wacc := '1';
|
nvmcntl.wacc := '1';
|
nvmcntl.req := '1';
|
nvmcntl.req := '1';
|
nstate := s_opa_jsr_push_w;
|
nstate := s_opa_jsr_push_w;
|
|
|
when s_opa_jsr_push_w =>
|
when s_opa_jsr_push_w =>
|
nstate := s_opa_jsr_push_w;
|
nstate := s_opa_jsr_push_w;
|
ndpcntl.abox_asel := c_abox_asel_pc; -- ABOX A=PC
|
ndpcntl.ounit_asel := c_ounit_asel_pc; -- OUNIT A=PC
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := SRCREG;
|
ndpcntl.gpr_adst := SRCREG;
|
do_memcheck(nstate, nstatus, imemok);
|
do_memcheck(nstate, nstatus, imemok);
|
if imemok then
|
if imemok then
|
ndpcntl.gpr_we := '1'; -- load R with PC
|
ndpcntl.gpr_we := '1'; -- load R with PC
|
nstate := s_opa_jsr2;
|
nstate := s_opa_jsr2;
|
end if;
|
end if;
|
|
|
when s_opa_jsr2 =>
|
when s_opa_jsr2 =>
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_we := '1'; -- load PC with dsta
|
ndpcntl.gpr_we := '1'; -- load PC with dsta
|
do_fork_next(nstate, nstatus, nmmumoni);
|
do_fork_next(nstate, nstatus, nmmumoni);
|
|
|
when s_opa_jmp =>
|
when s_opa_jmp =>
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_adst := c_gpr_pc;
|
if R_IDSTAT.is_dstmode0 = '1' then
|
if R_IDSTAT.is_dstmode0 = '1' then
|
nstate := s_trap_10; -- trap 10 like 11/70
|
nstate := s_trap_10; -- trap 10 like 11/70
|
else
|
else
|
ndpcntl.gpr_we := '1'; -- load PC with dsta
|
ndpcntl.gpr_we := '1'; -- load PC with dsta
|
| Line 1894... |
Line 1897... |
end if;
|
end if;
|
ndpcntl.ddst_sel := c_dpath_ddst_dst; -- DDST = R(DST)
|
ndpcntl.ddst_sel := c_dpath_ddst_dst; -- DDST = R(DST)
|
ndpcntl.ddst_we := '1'; -- update DDST (needed for sp)
|
ndpcntl.ddst_we := '1'; -- update DDST (needed for sp)
|
|
|
when s_opa_mtp_reg =>
|
when s_opa_mtp_reg =>
|
ndpcntl.abox_asel := c_abox_asel_dtmp; -- ABOX A = DTMP
|
ndpcntl.ounit_asel := c_ounit_asel_dtmp; -- OUNIT A = DTMP
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B = const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B = const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.psr_ccwe := '1'; -- set cc (from abox too)
|
ndpcntl.psr_ccwe := '1'; -- set cc (from ounit too)
|
ndpcntl.gpr_mode := PSW.pmode; -- load reg in pmode
|
ndpcntl.gpr_mode := PSW.pmode; -- load reg in pmode
|
ndpcntl.gpr_we := '1';
|
ndpcntl.gpr_we := '1';
|
do_fork_next(nstate, nstatus, nmmumoni);
|
do_fork_next(nstate, nstatus, nmmumoni);
|
|
|
when s_opa_mtp_mem =>
|
when s_opa_mtp_mem =>
|
ndpcntl.abox_asel := c_abox_asel_dtmp; -- ABOX A = DTMP
|
ndpcntl.ounit_asel := c_ounit_asel_dtmp; -- OUNIT A = DTMP
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B = const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B = const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.psr_ccwe := '1'; -- set cc (from abox too)
|
ndpcntl.psr_ccwe := '1'; -- set cc (from ounit too)
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_ddst;-- VA = DDST
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_ddst;-- VA = DDST
|
nvmcntl.dspace := IREG(15); -- msb indicates I/D: 0->I, 1->D
|
nvmcntl.dspace := IREG(15); -- msb indicates I/D: 0->I, 1->D
|
nvmcntl.mode := PSW.pmode;
|
nvmcntl.mode := PSW.pmode;
|
nvmcntl.wacc := '1';
|
nvmcntl.wacc := '1';
|
nvmcntl.req := '1';
|
nvmcntl.req := '1';
|
| Line 1950... |
Line 1953... |
ndpcntl.ddst_we := '1';
|
ndpcntl.ddst_we := '1';
|
nstate := s_opa_mfp_dec;
|
nstate := s_opa_mfp_dec;
|
end if;
|
end if;
|
|
|
when s_opa_mfp_dec =>
|
when s_opa_mfp_dec =>
|
ndpcntl.abox_asel := c_abox_asel_dsrc; -- ABOX A=DSRC
|
ndpcntl.ounit_asel := c_ounit_asel_dsrc; -- OUNIT A=DSRC
|
ndpcntl.abox_const := "000000010";
|
ndpcntl.ounit_const := "000000010";
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(2)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(2)
|
ndpcntl.abox_opsub := '1'; -- ABOX = A-B
|
ndpcntl.ounit_opsub := '1'; -- OUNIT = A-B
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
ndpcntl.gpr_adst := c_gpr_sp;
|
ndpcntl.gpr_adst := c_gpr_sp;
|
ndpcntl.gpr_we := '1'; -- update SP
|
ndpcntl.gpr_we := '1'; -- update SP
|
nmmumoni.regmod := '1';
|
nmmumoni.regmod := '1';
|
nmmumoni.isdec := '1';
|
nmmumoni.isdec := '1';
|
nstate := s_opa_mfp_push;
|
nstate := s_opa_mfp_push;
|
|
|
when s_opa_mfp_push =>
|
when s_opa_mfp_push =>
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.psr_ccwe := '1'; -- set cc (from abox too)
|
ndpcntl.psr_ccwe := '1'; -- set cc (from ounit too)
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_dsrc; -- VA = DSRC
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_dsrc; -- VA = DSRC
|
nvmcntl.dspace := '1';
|
nvmcntl.dspace := '1';
|
nvmcntl.kstack := is_kmode;
|
nvmcntl.kstack := is_kmode;
|
nvmcntl.wacc := '1';
|
nvmcntl.wacc := '1';
|
nvmcntl.req := '1';
|
nvmcntl.req := '1';
|
| Line 2054... |
Line 2057... |
ndpcntl.gpr_asrc := c_gpr_sp;
|
ndpcntl.gpr_asrc := c_gpr_sp;
|
ndpcntl.dsrc_we := '1'; -- DSRC = SP (in new mode)
|
ndpcntl.dsrc_we := '1'; -- DSRC = SP (in new mode)
|
nstate := s_int_decsp;
|
nstate := s_int_decsp;
|
|
|
when s_int_decsp =>
|
when s_int_decsp =>
|
ndpcntl.abox_asel := c_abox_asel_dsrc; -- ABOX A=DSRC
|
ndpcntl.ounit_asel := c_ounit_asel_dsrc; -- OUNIT A=DSRC
|
ndpcntl.abox_const := "000000010"; -- ABOX const=2
|
ndpcntl.ounit_const := "000000010"; -- OUNIT const=2
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const
|
ndpcntl.ounit_bsel := c_ounit_bsel_const;-- OUNIT B=const
|
ndpcntl.abox_opsub := '1'; -- ABOX = A-B
|
ndpcntl.ounit_opsub := '1'; -- OUNIT = A-B
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
ndpcntl.dsrc_we := '1'; -- update DSRC
|
ndpcntl.gpr_adst := c_gpr_sp;
|
ndpcntl.gpr_adst := c_gpr_sp;
|
ndpcntl.gpr_we := '1'; -- update SP too
|
ndpcntl.gpr_we := '1'; -- update SP too
|
nstate := s_int_pushps;
|
nstate := s_int_pushps;
|
|
|
when s_int_pushps =>
|
when s_int_pushps =>
|
ndpcntl.abox_asel := c_abox_asel_dtmp; -- ABOX A=DTMP (old PS)
|
ndpcntl.ounit_asel := c_ounit_asel_dtmp; -- OUNIT A=DTMP (old PS)
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const (0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const (0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_dsrc; -- VA = DSRC
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_dsrc; -- VA = DSRC
|
nvmcntl.wacc := '1'; -- write mem
|
nvmcntl.wacc := '1'; -- write mem
|
nvmcntl.dspace := '1';
|
nvmcntl.dspace := '1';
|
nvmcntl.kstack := is_kmode;
|
nvmcntl.kstack := is_kmode;
|
nvmcntl.req := '1';
|
nvmcntl.req := '1';
|
nstate := s_int_pushps_w;
|
nstate := s_int_pushps_w;
|
|
|
when s_int_pushps_w =>
|
when s_int_pushps_w =>
|
ndpcntl.abox_asel := c_abox_asel_dsrc; -- ABOX A=DSRC
|
ndpcntl.ounit_asel := c_ounit_asel_dsrc; -- OUNIT A=DSRC
|
ndpcntl.abox_const := "000000010"; -- ABOX const=2
|
ndpcntl.ounit_const := "000000010"; -- OUNIT const=2
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const
|
ndpcntl.ounit_bsel := c_ounit_bsel_const;-- OUNIT B=const
|
ndpcntl.abox_opsub := '1'; -- ABOX = A-B
|
ndpcntl.ounit_opsub := '1'; -- OUNIT = A-B
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.dsrc_sel := c_dpath_dsrc_res; -- DSRC = DRES
|
ndpcntl.gpr_adst := c_gpr_sp;
|
ndpcntl.gpr_adst := c_gpr_sp;
|
|
|
nstate := s_int_pushps_w;
|
nstate := s_int_pushps_w;
|
do_memcheck(nstate, nstatus, imemok);
|
do_memcheck(nstate, nstatus, imemok);
|
| Line 2094... |
Line 2097... |
ndpcntl.gpr_we := '1'; -- update SP too
|
ndpcntl.gpr_we := '1'; -- update SP too
|
nstate := s_int_pushpc;
|
nstate := s_int_pushpc;
|
end if;
|
end if;
|
|
|
when s_int_pushpc =>
|
when s_int_pushpc =>
|
ndpcntl.abox_asel := c_abox_asel_pc; -- ABOX A=PC
|
ndpcntl.ounit_asel := c_ounit_asel_pc; -- OUNIT A=PC
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const (0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const (0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_dsrc; -- VA = DSRC
|
ndpcntl.vmaddr_sel := c_dpath_vmaddr_dsrc; -- VA = DSRC
|
nvmcntl.wacc := '1'; -- write mem
|
nvmcntl.wacc := '1'; -- write mem
|
nvmcntl.dspace := '1';
|
nvmcntl.dspace := '1';
|
nvmcntl.kstack := is_kmode;
|
nvmcntl.kstack := is_kmode;
|
nvmcntl.req := '1';
|
nvmcntl.req := '1';
|
nstate := s_int_pushpc_w;
|
nstate := s_int_pushpc_w;
|
|
|
when s_int_pushpc_w =>
|
when s_int_pushpc_w =>
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const (0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const (0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_adst := c_gpr_pc;
|
|
|
nstate := s_int_pushpc_w;
|
nstate := s_int_pushpc_w;
|
do_memcheck(nstate, nstatus, imemok);
|
do_memcheck(nstate, nstatus, imemok);
|
if imemok then
|
if imemok then
|
| Line 2153... |
Line 2156... |
ndpcntl.psr_we := '1'; -- load new PS
|
ndpcntl.psr_we := '1'; -- load new PS
|
nstate := s_rti_newpc;
|
nstate := s_rti_newpc;
|
end if;
|
end if;
|
|
|
when s_rti_newpc =>
|
when s_rti_newpc =>
|
ndpcntl.abox_asel := c_abox_asel_ddst; -- ABOX A=DDST
|
ndpcntl.ounit_asel := c_ounit_asel_ddst; -- OUNIT A=DDST
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const (0)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const (0)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_adst := c_gpr_pc;
|
ndpcntl.gpr_we := '1'; -- load new PC
|
ndpcntl.gpr_we := '1'; -- load new PC
|
if R_IDSTAT.op_rtt = '1' then -- if RTT instruction
|
if R_IDSTAT.op_rtt = '1' then -- if RTT instruction
|
nstate := s_ifetch; -- force fetch
|
nstate := s_ifetch; -- force fetch
|
else -- otherwise RTI
|
else -- otherwise RTI
|
| Line 2170... |
Line 2173... |
|
|
when s_vmerr =>
|
when s_vmerr =>
|
nstate := s_cpufail;
|
nstate := s_cpufail;
|
|
|
-- setup for R_VMSTAT.err_rsv='1'
|
-- setup for R_VMSTAT.err_rsv='1'
|
ndpcntl.abox_azero := '1'; -- ABOX A = 0
|
ndpcntl.ounit_azero := '1'; -- OUNIT A = 0
|
ndpcntl.abox_const := "000000100"; -- emergency stack pointer
|
ndpcntl.ounit_const := "000000100"; -- emergency stack pointer
|
ndpcntl.abox_bsel := c_abox_bsel_const; -- ABOX B=const(vector)
|
ndpcntl.ounit_bsel := c_ounit_bsel_const; -- OUNIT B=const(vector)
|
ndpcntl.dres_sel := c_dpath_res_abox; -- DRES = ABOX
|
ndpcntl.dres_sel := c_dpath_res_ounit; -- DRES = OUNIT
|
ndpcntl.gpr_mode := c_psw_kmode; -- set kmode SP to 4
|
ndpcntl.gpr_mode := c_psw_kmode; -- set kmode SP to 4
|
ndpcntl.gpr_adst := c_gpr_sp;
|
ndpcntl.gpr_adst := c_gpr_sp;
|
|
|
nstatus.trap_mmu :='0'; -- drop pending mmu trap
|
nstatus.trap_mmu :='0'; -- drop pending mmu trap
|
|
|
| Line 2249... |
Line 2252... |
|
|
DP_CNTL <= ndpcntl;
|
DP_CNTL <= ndpcntl;
|
VM_CNTL <= nvmcntl;
|
VM_CNTL <= nvmcntl;
|
|
|
nmmumoni.regnum := ndpcntl.gpr_adst;
|
nmmumoni.regnum := ndpcntl.gpr_adst;
|
nmmumoni.delta := ndpcntl.abox_const(3 downto 0);
|
nmmumoni.delta := ndpcntl.ounit_const(3 downto 0);
|
MMU_MONI <= nmmumoni;
|
MMU_MONI <= nmmumoni;
|
|
|
end process proc_next;
|
end process proc_next;
|
|
|
proc_cpstat : process (R_STATUS)
|
proc_cpstat : process (R_STATUS)
|
