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-- $Id: ib_intmap.vhd 314 2010-07-09 17:38:41Z mueller $ -- -- Copyright 2006-2008 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: ib_intmap - syn -- Description: pdp11: external interrupt mapper -- -- Dependencies: - -- Test bench: tb/tb_pdp11_core (implicit) -- Target Devices: generic -- Tool versions: xst 8.1, 8.2, 9.1, 9.2; ghdl 0.18-0.25 -- Revision History: -- Date Rev Version Comment -- 2008-08-22 161 1.2.1 renamed pdp11_ -> ib_; use iblib -- 2008-01-20 112 1.2 add INTMAP generic to externalize config -- 2008-01-06 111 1.1 add EI_ACK output lines, remove EI_LINE -- 2007-10-12 88 1.0.2 avoid ieee.std_logic_unsigned, use cast to unsigned -- 2007-06-14 56 1.0.1 Use slvtypes.all -- 2007-05-12 26 1.0 Initial version ------------------------------------------------------------------------------ library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_arith.all; use work.slvtypes.all; use work.iblib.all; -- ---------------------------------------------------------------------------- entity ib_intmap is -- external interrupt mapper generic ( INTMAP : intmap_array_type := intmap_array_init); port ( EI_REQ : in slv16_1; -- interrupt request lines EI_ACKM : in slbit; -- interrupt acknowledge (from master) EI_ACK : out slv16_1; -- interrupt acknowledge (to requestor) EI_PRI : out slv3; -- interrupt priority EI_VECT : out slv9_2 -- interrupt vector ); end ib_intmap; architecture syn of ib_intmap is signal EI_LINE : slv4 := (others=>'0'); -- external interrupt line type intp_type is array (15 downto 0) of slv3; type intv_type is array (15 downto 0) of slv9; constant conf_intp : intp_type := (conv_std_logic_vector(INTMAP(15).pri,3), -- line 15 conv_std_logic_vector(INTMAP(14).pri,3), -- line 14 conv_std_logic_vector(INTMAP(13).pri,3), -- line 13 conv_std_logic_vector(INTMAP(12).pri,3), -- line 12 conv_std_logic_vector(INTMAP(11).pri,3), -- line 11 conv_std_logic_vector(INTMAP(10).pri,3), -- line 10 conv_std_logic_vector(INTMAP( 9).pri,3), -- line 9 conv_std_logic_vector(INTMAP( 8).pri,3), -- line 8 conv_std_logic_vector(INTMAP( 7).pri,3), -- line 7 conv_std_logic_vector(INTMAP( 6).pri,3), -- line 6 conv_std_logic_vector(INTMAP( 5).pri,3), -- line 5 conv_std_logic_vector(INTMAP( 4).pri,3), -- line 4 conv_std_logic_vector(INTMAP( 3).pri,3), -- line 3 conv_std_logic_vector(INTMAP( 2).pri,3), -- line 2 conv_std_logic_vector(INTMAP( 1).pri,3), -- line 1 conv_std_logic_vector( 0,3) -- line 0 (always 0 !!) ); constant conf_intv : intv_type := (conv_std_logic_vector(INTMAP(15).vec,9), -- line 15 conv_std_logic_vector(INTMAP(14).vec,9), -- line 14 conv_std_logic_vector(INTMAP(13).vec,9), -- line 13 conv_std_logic_vector(INTMAP(12).vec,9), -- line 12 conv_std_logic_vector(INTMAP(11).vec,9), -- line 11 conv_std_logic_vector(INTMAP(10).vec,9), -- line 10 conv_std_logic_vector(INTMAP( 9).vec,9), -- line 9 conv_std_logic_vector(INTMAP( 8).vec,9), -- line 8 conv_std_logic_vector(INTMAP( 7).vec,9), -- line 7 conv_std_logic_vector(INTMAP( 6).vec,9), -- line 6 conv_std_logic_vector(INTMAP( 5).vec,9), -- line 5 conv_std_logic_vector(INTMAP( 4).vec,9), -- line 4 conv_std_logic_vector(INTMAP( 3).vec,9), -- line 3 conv_std_logic_vector(INTMAP( 2).vec,9), -- line 2 conv_std_logic_vector(INTMAP( 1).vec,9), -- line 1 conv_std_logic_vector( 0,9) -- line 0 (always 0 !!) ); -- attribute PRIORITY_EXTRACT : string; -- attribute PRIORITY_EXTRACT of EI_LINE : signal is "force"; begin EI_LINE <= "1111" when EI_REQ(15)='1' else "1110" when EI_REQ(14)='1' else "1101" when EI_REQ(13)='1' else "1100" when EI_REQ(12)='1' else "1011" when EI_REQ(11)='1' else "1010" when EI_REQ(10)='1' else "1001" when EI_REQ( 9)='1' else "1000" when EI_REQ( 8)='1' else "0111" when EI_REQ( 7)='1' else "0110" when EI_REQ( 6)='1' else "0101" when EI_REQ( 5)='1' else "0100" when EI_REQ( 4)='1' else "0011" when EI_REQ( 3)='1' else "0010" when EI_REQ( 2)='1' else "0001" when EI_REQ( 1)='1' else "0000"; proc_intmap : process (EI_LINE, EI_ACKM) variable iline : integer := 0; variable iei_ack : slv16 := (others=>'0'); begin iline := conv_integer(unsigned(EI_LINE)); iei_ack := (others=>'0'); if EI_ACKM = '1' then iei_ack(iline) := '1'; end if; EI_ACK <= iei_ack(EI_ACK'range); EI_PRI <= conf_intp(iline); EI_VECT <= conf_intv(iline)(8 downto 2); end process proc_intmap; end syn;