cvs.zerfleddert.de Git - raggedstone/blob - dhwk/source/config_wr_0.vhd

   1 -- J.STELZNER
   2 -- INFORMATIK-3 LABOR
   3 -- 23.08.2006
   4 -- File: CONFIG_WR_0.VHD
   5
   6 library IEEE;
   7 use IEEE.std_logic_1164.all;
   8
   9 entity CONFIG_WR_0 is
  10     port
  11         (
  12         ADDR_REG                        :in             std_logic_vector(31 downto 0);
  13         CF_WR_COM                       :in             std_logic;
  14         IRDY_REGn                       :in             std_logic;
  15         TRDYn                                   :in             std_logic;
  16         CONF_WR_04H             :out    std_logic;
  17         CONF_WR_10H             :out    std_logic;
  18         CONF_WR_3CH             :out    std_logic
  19 --CONF_WR_40H           :out    std_logic
  20     );
  21 end entity CONFIG_WR_0;
  22
  23 architecture CONFIG_WR_0_DESIGN of CONFIG_WR_0 is
  24
  25 --
  26 --
  27 --
  28 --
  29 --
  30 --                             PCI Configuration Space Header
  31 --
  32 --       \                        Bit
  33 --                        \
  34 --Address       |31                                     24|23                             16|15                    8|7                           0|
  35 -----------------------------------------------------------------
  36 --00                    |Device ID                                                                      |Vendor ID                                                      |
  37 --04                    |Status                                                                                 |Command                                                                |
  38 --08                    |Class Code                                                                     |Revision ID                                            |
  39 --0C                    |BIST                           |Header Type            |Latency T.     |Cache L.S.     |
  40 --10-24         |Base Address Register                                                                                                                  |
  41 --28                    |Cardbus CIS Pointer                                                                                                                            |
  42 --2C                    |Subsystem ID                                                           |Subsystem Vendor ID            |
  43 --30                    |Expansion ROM Base Address                                                                                                     |
  44 --34                    |Reserved                                                                                                                                                                               |
  45 --38                    |Reserved                                                                                                                                                                               |
  46 --3C                    |Max_Lat                |Min_Gnt                                |Int_Pin                |Int_Line               |
  47 --40-FF         |                                                                                                                                                                                                               |
  48 -----------------------------------------------------------------
  49
  50
  51 --PCI Bus Commands
  52 --C/BE[3..0] Command Type
  53 --------------------------------------
  54 --      0000            Interrupt Acknowledge
  55 --      0001            Special Cycle
  56 --      0010            I/O Read
  57 --      0011            I/O Write
  58 --      0100            Reserved
  59 --      0101            Reserved
  60 --      0110            Memory Read
  61 --      0111            Memory Write
  62 --
  63 --      1000            Reserved
  64 --      1001            Reserved
  65 --      1010            Configuration Read
  66 --      1011            Configuration Write
  67 --      1100            Memory Read Multiple
  68 --      1101            Dual Address Cycle
  69 --      1110            Memory Read Line
  70 --      1111            Memory Write and Invalidate
  71
  72
  73 --PCI Byte Enable
  74 --C/BE[3..0] gueltige Datenbits
  75 -------------------------------
  76 --      0000            AD 31..0
  77 --      1000            AD 23..0
  78 --      1100            AD 15..0
  79 --      1110            AD  7..0
  80
  81         constant        CMD_INT_ACK                     :std_logic_vector(3 downto 0) := "0000";
  82         constant        CMD_SP_CYC                      :std_logic_vector(3 downto 0) := "0001";
  83         constant        CMD_IO_READ                     :std_logic_vector(3 downto 0) := "0010";
  84         constant        CMD_IO_WRITE            :std_logic_vector(3 downto 0) := "0011";
  85         constant        CMD_RES_4                               :std_logic_vector(3 downto 0) := "0100";
  86         constant        CMD_RES_5                               :std_logic_vector(3 downto 0) := "0101";
  87         constant        CMD_MEM_READ            :std_logic_vector(3 downto 0) := "0110";
  88         constant        CMD_MEM_WRITE           :std_logic_vector(3 downto 0) := "0111";
  89         constant        CMD_RES_8                               :std_logic_vector(3 downto 0) := "1000";
  90         constant        CMD_RES_9                               :std_logic_vector(3 downto 0) := "1001";
  91         constant        CMD_CONF_READ           :std_logic_vector(3 downto 0) := "1010";
  92         constant        CMD_CONF_WRITE  :std_logic_vector(3 downto 0) := "1011";
  93         constant        CMD_MEM_READ_M  :std_logic_vector(3 downto 0) := "1100";
  94         constant        CMD_DU_ADR_CYC  :std_logic_vector(3 downto 0) := "1101";
  95         constant        CMD_MEN_READ_L  :std_logic_vector(3 downto 0) := "1110";
  96         constant        CMD_MEM_WRITE_I :std_logic_vector(3 downto 0) := "1111";
  97
  98         signal          CONFIG_ADDR                     :std_logic_vector(7 downto 0);
  99         signal          CONFIG_WRITE            :std_logic_vector(3 downto 0);
 100
 101
 102 begin
 103
 104 --*******************************************************************
 105 --******************* PCI Write Configuration Address ***************
 106 --*******************************************************************
 107
 108         CONFIG_ADDR(7 downto 0) <= ADDR_REG(7 downto 0);
 109
 110
 111         process (CF_WR_COM,IRDY_REGn,TRDYn,CONFIG_ADDR)
 112         begin
 113
 114                 if      CF_WR_COM = '1' and     IRDY_REGn = '0' and     TRDYn = '0'     then
 115
 116                         if                      CONFIG_ADDR = X"04"     then    CONFIG_WRITE    <= "0001";
 117                                 elsif   CONFIG_ADDR = X"10"     then    CONFIG_WRITE    <= "0010";
 118                                 elsif   CONFIG_ADDR = X"3C"     then    CONFIG_WRITE    <= "0100";
 119 --                      elsif   CONFIG_ADDR = X"40"     then    CONFIG_WRITE    <= "1000";
 120                                 else                                                                                                            CONFIG_WRITE    <= "0000";
 121                         end if;
 122                 else                                                                                                                            CONFIG_WRITE    <= "0000";
 123                 end if;
 124         end process;
 125
 126         CONF_WR_04H     <=      CONFIG_WRITE(0);
 127         CONF_WR_10H     <=      CONFIG_WRITE(1);
 128         CONF_WR_3CH     <=      CONFIG_WRITE(2);
 129 --CONF_WR_40H   <=      CONFIG_WRITE(3);
 130
 131 end architecture CONFIG_WR_0_DESIGN;