git.zerfleddert.de Git - raggedstone/blob - dhwk/source/config_3Ch.vhd

   1 -- J.STELZNER
   2 -- INFORMATIK-3 LABOR
   3 -- 23.08.2006
   4 -- File: CONFIG_3CH.VHD
   5
   6 library IEEE;
   7 use IEEE.std_logic_1164.all;
   8
   9 entity CONFIG_3CH is
  10     port
  11         (
  12         PCI_CLOCK                       :in             std_logic;
  13         PCI_RSTn                        :in             std_logic;
  14         AD_REG                          :in             std_logic_vector (31 downto 0);
  15         CBE_REGn                        :in             std_logic_vector ( 3 downto 0);
  16         CONF_WR_3CH             :in             std_logic;
  17         CONF_DATA_3CH   :out    std_logic_vector (31 downto 0)
  18     );
  19 end entity CONFIG_3CH;
  20
  21 architecture CONFIG_3CH_DESIGN of CONFIG_3CH is
  22
  23 -- PCI Configuration Space Header Addr : HEX 3C --
  24
  25         signal          CONF_MAX_LAT            :std_logic_vector (31 downto 24);
  26         signal          CONF_MIN_GNT            :std_logic_vector (23 downto 16);
  27         signal          CONF_INT_PIN            :std_logic_vector (15 downto  8);
  28         signal          CONF_INT_LINE           :std_logic_vector ( 7 downto  0);
  29
  30         constant        cmd_conf_write  :std_logic_vector(3 downto 0) := "1011";
  31
  32 begin
  33
  34 --*******************************************************************
  35 --*********** PCI Configuration Space Header "INTERRUPT" ************
  36 --*******************************************************************
  37
  38                 CONF_MAX_LAT    <= X"00";
  39                 CONF_MIN_GNT    <= X"00";
  40 --      CONF_INT_PIN    <= X"00";                               -- Interrupt -
  41                 CONF_INT_PIN    <= X"01";                               -- Interrupt A
  42 --      CONF_INT_PIN    <= X"02";                               -- Interrupt B
  43 --      CONF_INT_PIN    <= X"03";                               -- Interrupt C
  44 --      CONF_INT_PIN    <= X"04";                               -- Interrupt D
  45 --      CONF_INT_PIN    <= X"05 - FF0"; -- Reserviert
  46
  47         process (PCI_CLOCK,PCI_RSTn)
  48         begin
  49                 if PCI_RSTn = '0' then  CONF_INT_LINE <= (others =>'0');
  50
  51                 elsif (PCI_CLOCK'event and PCI_CLOCK = '1') then
  52
  53                         if                      CONF_WR_3CH      = '1'and CBE_REGn(0) = '0' then
  54
  55                                                         CONF_INT_LINE(7 downto 0) <= AD_REG(7 downto 0);
  56                                 else    CONF_INT_LINE(7 downto 0) <= CONF_INT_LINE(7 downto 0);
  57                         end if;
  58
  59                 end if;
  60
  61         end process;
  62
  63         CONF_DATA_3CH   <= CONF_MAX_LAT & CONF_MIN_GNT & CONF_INT_PIN & CONF_INT_LINE ;
  64
  65 end architecture CONFIG_3CH_DESIGN;
  66
  67
  68