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-- $Id: pdp11_irq.vhd 314 2010-07-09 17:38:41Z mueller $
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-- $Id: pdp11_irq.vhd 335 2010-10-24 22:24:23Z mueller $
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--
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--
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-- Copyright 2007-2008 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
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-- Copyright 2007-2010 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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-- 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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--
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--
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------------------------------------------------------------------------------
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------------------------------------------------------------------------------
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-- Module Name: pdp11_irq - syn
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-- Module Name: pdp11_irq - syn
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-- Description: pdp11: interrupt requester
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-- Description: pdp11: interrupt requester
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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 1.2.1 use ib_sel
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-- 2010-10-17 333 1.2 use ibus V2 interface
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-- 2008-08-22 161 1.1.4 use iblib
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-- 2008-08-22 161 1.1.4 use iblib
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-- 2008-04-25 138 1.1.3 use BRESET to clear pirq
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-- 2008-04-25 138 1.1.3 use BRESET to clear pirq
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-- 2008-01-06 111 1.1.2 rename signal EI_ACK->EI_ACKM (master ack)
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-- 2008-01-06 111 1.1.2 rename signal EI_ACK->EI_ACKM (master ack)
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-- 2008-01-05 110 1.1.1 rename IB_MREQ(ena->req) SRES(sel->ack, hold->busy)
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-- 2008-01-05 110 1.1.1 rename IB_MREQ(ena->req) SRES(sel->ack, hold->busy)
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-- 2007-12-30 107 1.1 use IB_MREQ/IB_SRES interface now
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-- 2007-12-30 107 1.1 use IB_MREQ/IB_SRES interface now
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-- attribute PRIORITY_EXTRACT : string;
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-- attribute PRIORITY_EXTRACT : string;
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-- attribute PRIORITY_EXTRACT of PI_PRI : signal is "force";
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-- attribute PRIORITY_EXTRACT of PI_PRI : signal is "force";
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begin
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begin
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proc_ibsel: process (IB_MREQ)
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SEL : ib_sel
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variable ipirq : slbit := '0';
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generic map (
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begin
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IB_ADDR => ibaddr_pirq)
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ipirq := '0';
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port map (
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if IB_MREQ.req='1' and IB_MREQ.addr=ibaddr_pirq(12 downto 1) then
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CLK => CLK,
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ipirq := '1';
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IB_MREQ => IB_MREQ,
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end if;
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SEL => IBSEL_PIRQ
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IBSEL_PIRQ <= ipirq;
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);
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IB_SRES.ack <= ipirq;
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IB_SRES.busy <= '0';
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end process proc_ibsel;
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proc_ibdout : process (IBSEL_PIRQ, R_PIRQ, PI_PRI)
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proc_ibres : process (IBSEL_PIRQ, IB_MREQ, R_PIRQ, PI_PRI)
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variable pirqout : 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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pirqout := (others=>'0');
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idout := (others=>'0');
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if IBSEL_PIRQ = '1' then
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if IBSEL_PIRQ = '1' then
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pirqout(pirq_ubf_pir) := R_PIRQ;
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idout(pirq_ubf_pir) := R_PIRQ;
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pirqout(pirq_ubf_pia_h) := PI_PRI;
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idout(pirq_ubf_pia_h) := PI_PRI;
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pirqout(pirq_ubf_pia_l) := PI_PRI;
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idout(pirq_ubf_pia_l) := PI_PRI;
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end if;
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end if;
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IB_SRES.dout <= pirqout;
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IB_SRES.dout <= idout;
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end process proc_ibdout;
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IB_SRES.ack <= IBSEL_PIRQ 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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proc_pirq : process (CLK)
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proc_pirq : 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 CLK'event and CLK='1' then
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if BRESET = '1' then
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if BRESET = '1' then
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