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-- $Id: ib_intmap.vhd 427 2011-11-19 21:04:11Z mueller $
--
-- Copyright 2006-2011 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>
--
-- This program is free software; you may redistribute and/or modify it under
-- the terms of the GNU General Public License as published by the Free
-- Software Foundation, either version 2, or at your option any later version.
--
-- This program is distributed in the hope that it will be useful, but
-- WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY
-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-- for complete details.
--
------------------------------------------------------------------------------
-- Module Name:    ib_intmap - syn
-- Description:    pdp11: external interrupt mapper
--
-- Dependencies:   -
-- Test bench:     tb/tb_pdp11_core (implicit)
-- Target Devices: generic
-- Tool versions:  xst 8.2, 9.1, 9.2, 13.1; ghdl 0.18-0.29
-- Revision History: 
-- Date         Rev Version  Comment
-- 2011-11-18   427   1.2.2  now numeric_std clean
-- 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.numeric_std.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 :=
    (slv(to_unsigned(INTMAP(15).pri,3)),  -- line 15
     slv(to_unsigned(INTMAP(14).pri,3)),  -- line 14
     slv(to_unsigned(INTMAP(13).pri,3)),  -- line 13
     slv(to_unsigned(INTMAP(12).pri,3)),  -- line 12
     slv(to_unsigned(INTMAP(11).pri,3)),  -- line 11
     slv(to_unsigned(INTMAP(10).pri,3)),  -- line 10
     slv(to_unsigned(INTMAP( 9).pri,3)),  -- line  9
     slv(to_unsigned(INTMAP( 8).pri,3)),  -- line  8
     slv(to_unsigned(INTMAP( 7).pri,3)),  -- line  7
     slv(to_unsigned(INTMAP( 6).pri,3)),  -- line  6
     slv(to_unsigned(INTMAP( 5).pri,3)),  -- line  5
     slv(to_unsigned(INTMAP( 4).pri,3)),  -- line  4
     slv(to_unsigned(INTMAP( 3).pri,3)),  -- line  3
     slv(to_unsigned(INTMAP( 2).pri,3)),  -- line  2
     slv(to_unsigned(INTMAP( 1).pri,3)),  -- line  1     
     slv(to_unsigned(             0,3))   -- line  0 (always 0 !!)
     );
 
  constant conf_intv : intv_type :=
    (slv(to_unsigned(INTMAP(15).vec,9)),  -- line 15
     slv(to_unsigned(INTMAP(14).vec,9)),  -- line 14
     slv(to_unsigned(INTMAP(13).vec,9)),  -- line 13
     slv(to_unsigned(INTMAP(12).vec,9)),  -- line 12
     slv(to_unsigned(INTMAP(11).vec,9)),  -- line 11
     slv(to_unsigned(INTMAP(10).vec,9)),  -- line 10
     slv(to_unsigned(INTMAP( 9).vec,9)),  -- line  9
     slv(to_unsigned(INTMAP( 8).vec,9)),  -- line  8
     slv(to_unsigned(INTMAP( 7).vec,9)),  -- line  7
     slv(to_unsigned(INTMAP( 6).vec,9)),  -- line  6
     slv(to_unsigned(INTMAP( 5).vec,9)),  -- line  5
     slv(to_unsigned(INTMAP( 4).vec,9)),  -- line  4
     slv(to_unsigned(INTMAP( 3).vec,9)),  -- line  3
     slv(to_unsigned(INTMAP( 2).vec,9)),  -- line  2
     slv(to_unsigned(INTMAP( 1).vec,9)),  -- line  1     
     slv(to_unsigned(             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 := to_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;

Line No.	Rev	Author	Line
1	13	wfjm	`-- $Id: ib_intmap.vhd 427 2011-11-19 21:04:11Z mueller $`
2	2	wfjm	`--`
3	13	wfjm	`-- Copyright 2006-2011 by Walter F.J. Mueller <W.F.J.Mueller@gsi.de>`
4	2	wfjm	`--`
5			`-- This program is free software; you may redistribute and/or modify it under`
6			`-- the terms of the GNU General Public License as published by the Free`
7			`-- Software Foundation, either version 2, or at your option any later version.`
8			`--`
9			`-- This program is distributed in the hope that it will be useful, but`
10			`-- WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY`
11			`-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License`
12			`-- for complete details.`
13			`--`
14			`------------------------------------------------------------------------------`
15			`-- Module Name: ib_intmap - syn`
16			`-- Description: pdp11: external interrupt mapper`
17			`--`
18			`-- Dependencies: -`
19			`-- Test bench: tb/tb_pdp11_core (implicit)`
20			`-- Target Devices: generic`
21	13	wfjm	`-- Tool versions: xst 8.2, 9.1, 9.2, 13.1; ghdl 0.18-0.29`
22	2	wfjm	`-- Revision History:`
23			`-- Date Rev Version Comment`
24	13	wfjm	`-- 2011-11-18 427 1.2.2 now numeric_std clean`
25	2	wfjm	`-- 2008-08-22 161 1.2.1 renamed pdp11_ -> ib_; use iblib`
26			`-- 2008-01-20 112 1.2 add INTMAP generic to externalize config`
27			`-- 2008-01-06 111 1.1 add EI_ACK output lines, remove EI_LINE`
28			`-- 2007-10-12 88 1.0.2 avoid ieee.std_logic_unsigned, use cast to unsigned`
29			`-- 2007-06-14 56 1.0.1 Use slvtypes.all`
30			`-- 2007-05-12 26 1.0 Initial version`
31			`------------------------------------------------------------------------------`
32
33			`library ieee;`
34			`use ieee.std_logic_1164.all;`
35	13	wfjm	`use ieee.numeric_std.all;`
36	2	wfjm
37			`use work.slvtypes.all;`
38			`use work.iblib.all;`
39
40			`-- ----------------------------------------------------------------------------`
41
42			`entity ib_intmap is -- external interrupt mapper`
43			`generic (`
44			`INTMAP : intmap_array_type := intmap_array_init);`
45			`port (`
46			`EI_REQ : in slv16_1; -- interrupt request lines`
47			`EI_ACKM : in slbit; -- interrupt acknowledge (from master)`
48			`EI_ACK : out slv16_1; -- interrupt acknowledge (to requestor)`
49			`EI_PRI : out slv3; -- interrupt priority`
50			`EI_VECT : out slv9_2 -- interrupt vector`
51			`);`
52			`end ib_intmap;`
53
54			`architecture syn of ib_intmap is`
55
56			`signal EI_LINE : slv4 := (others=>'0'); -- external interrupt line`
57
58			`type intp_type is array (15 downto 0) of slv3;`
59			`type intv_type is array (15 downto 0) of slv9;`
60
61			`constant conf_intp : intp_type :=`
62	13	wfjm	`(slv(to_unsigned(INTMAP(15).pri,3)), -- line 15`
63			`slv(to_unsigned(INTMAP(14).pri,3)), -- line 14`
64			`slv(to_unsigned(INTMAP(13).pri,3)), -- line 13`
65			`slv(to_unsigned(INTMAP(12).pri,3)), -- line 12`
66			`slv(to_unsigned(INTMAP(11).pri,3)), -- line 11`
67			`slv(to_unsigned(INTMAP(10).pri,3)), -- line 10`
68			`slv(to_unsigned(INTMAP( 9).pri,3)), -- line 9`
69			`slv(to_unsigned(INTMAP( 8).pri,3)), -- line 8`
70			`slv(to_unsigned(INTMAP( 7).pri,3)), -- line 7`
71			`slv(to_unsigned(INTMAP( 6).pri,3)), -- line 6`
72			`slv(to_unsigned(INTMAP( 5).pri,3)), -- line 5`
73			`slv(to_unsigned(INTMAP( 4).pri,3)), -- line 4`
74			`slv(to_unsigned(INTMAP( 3).pri,3)), -- line 3`
75			`slv(to_unsigned(INTMAP( 2).pri,3)), -- line 2`
76			`slv(to_unsigned(INTMAP( 1).pri,3)), -- line 1`
77			`slv(to_unsigned( 0,3)) -- line 0 (always 0 !!)`
78	2	wfjm	`);`
79
80			`constant conf_intv : intv_type :=`
81	13	wfjm	`(slv(to_unsigned(INTMAP(15).vec,9)), -- line 15`
82			`slv(to_unsigned(INTMAP(14).vec,9)), -- line 14`
83			`slv(to_unsigned(INTMAP(13).vec,9)), -- line 13`
84			`slv(to_unsigned(INTMAP(12).vec,9)), -- line 12`
85			`slv(to_unsigned(INTMAP(11).vec,9)), -- line 11`
86			`slv(to_unsigned(INTMAP(10).vec,9)), -- line 10`
87			`slv(to_unsigned(INTMAP( 9).vec,9)), -- line 9`
88			`slv(to_unsigned(INTMAP( 8).vec,9)), -- line 8`
89			`slv(to_unsigned(INTMAP( 7).vec,9)), -- line 7`
90			`slv(to_unsigned(INTMAP( 6).vec,9)), -- line 6`
91			`slv(to_unsigned(INTMAP( 5).vec,9)), -- line 5`
92			`slv(to_unsigned(INTMAP( 4).vec,9)), -- line 4`
93			`slv(to_unsigned(INTMAP( 3).vec,9)), -- line 3`
94			`slv(to_unsigned(INTMAP( 2).vec,9)), -- line 2`
95			`slv(to_unsigned(INTMAP( 1).vec,9)), -- line 1`
96			`slv(to_unsigned( 0,9)) -- line 0 (always 0 !!)`
97	2	wfjm	`);`
98
99			`-- attribute PRIORITY_EXTRACT : string;`
100			`-- attribute PRIORITY_EXTRACT of EI_LINE : signal is "force";`
101
102			`begin`
103
104			`EI_LINE <= "1111" when EI_REQ(15)='1' else`
105			`"1110" when EI_REQ(14)='1' else`
106			`"1101" when EI_REQ(13)='1' else`
107			`"1100" when EI_REQ(12)='1' else`
108			`"1011" when EI_REQ(11)='1' else`
109			`"1010" when EI_REQ(10)='1' else`
110			`"1001" when EI_REQ( 9)='1' else`
111			`"1000" when EI_REQ( 8)='1' else`
112			`"0111" when EI_REQ( 7)='1' else`
113			`"0110" when EI_REQ( 6)='1' else`
114			`"0101" when EI_REQ( 5)='1' else`
115			`"0100" when EI_REQ( 4)='1' else`
116			`"0011" when EI_REQ( 3)='1' else`
117			`"0010" when EI_REQ( 2)='1' else`
118			`"0001" when EI_REQ( 1)='1' else`
119			`"0000";`
120
121			`proc_intmap : process (EI_LINE, EI_ACKM)`
122			`variable iline : integer := 0;`
123			`variable iei_ack : slv16 := (others=>'0');`
124			`begin`
125
126	13	wfjm	`iline := to_integer(unsigned(EI_LINE));`
127	2	wfjm
128			`iei_ack := (others=>'0');`
129			`if EI_ACKM = '1' then`
130			`iei_ack(iline) := '1';`
131			`end if;`
132
133			`EI_ACK <= iei_ack(EI_ACK'range);`
134			`EI_PRI <= conf_intp(iline);`
135			`EI_VECT <= conf_intv(iline)(8 downto 2);`
136
137			`end process proc_intmap;`
138
139			`end syn;`

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[/] [w11/] [tags/] [w11a_V0.6/] [rtl/] [ibus/] [ib_intmap.vhd] - Blame information for rev 24