--- J.STELZNER
--- INFORMATIK-3 LABOR
--- 23.08.2006
--- File: CONFIG_WR_0.VHD
-
-library IEEE;
-use IEEE.std_logic_1164.all;
-
-entity CONFIG_WR_0 is
- port
- (
- ADDR_REG :in std_logic_vector(31 downto 0);
- CF_WR_COM :in std_logic;
- IRDY_REGn :in std_logic;
- TRDYn :in std_logic;
- CONF_WR_04H :out std_logic;
- CONF_WR_10H :out std_logic;
- CONF_WR_3CH :out std_logic
- --CONF_WR_40H :out std_logic
- );
-end entity CONFIG_WR_0;
-
-architecture CONFIG_WR_0_DESIGN of CONFIG_WR_0 is
-
- --
- --
- --
- --
- --
- -- PCI Configuration Space Header
- --
- -- \ Bit
- -- \
- --Address |31 24|23 16|15 8|7 0|
- -----------------------------------------------------------------
- --00 |Device ID |Vendor ID |
- --04 |Status |Command |
- --08 |Class Code |Revision ID |
- --0C |BIST |Header Type |Latency T. |Cache L.S. |
- --10-24 |Base Address Register |
- --28 |Cardbus CIS Pointer |
- --2C |Subsystem ID |Subsystem Vendor ID |
- --30 |Expansion ROM Base Address |
- --34 |Reserved |
- --38 |Reserved |
- --3C |Max_Lat |Min_Gnt |Int_Pin |Int_Line |
- --40-FF | |
- -----------------------------------------------------------------
-
-
- --PCI Bus Commands
- --C/BE[3..0] Command Type
- --------------------------------------
- -- 0000 Interrupt Acknowledge
- -- 0001 Special Cycle
- -- 0010 I/O Read
- -- 0011 I/O Write
- -- 0100 Reserved
- -- 0101 Reserved
- -- 0110 Memory Read
- -- 0111 Memory Write
- --
- -- 1000 Reserved
- -- 1001 Reserved
- -- 1010 Configuration Read
- -- 1011 Configuration Write
- -- 1100 Memory Read Multiple
- -- 1101 Dual Address Cycle
- -- 1110 Memory Read Line
- -- 1111 Memory Write and Invalidate
-
-
- --PCI Byte Enable
- --C/BE[3..0] gueltige Datenbits
- -------------------------------
- -- 0000 AD 31..0
- -- 1000 AD 23..0
- -- 1100 AD 15..0
- -- 1110 AD 7..0
-
- constant CMD_INT_ACK :std_logic_vector(3 downto 0) := "0000";
- constant CMD_SP_CYC :std_logic_vector(3 downto 0) := "0001";
- constant CMD_IO_READ :std_logic_vector(3 downto 0) := "0010";
- constant CMD_IO_WRITE :std_logic_vector(3 downto 0) := "0011";
- constant CMD_RES_4 :std_logic_vector(3 downto 0) := "0100";
- constant CMD_RES_5 :std_logic_vector(3 downto 0) := "0101";
- constant CMD_MEM_READ :std_logic_vector(3 downto 0) := "0110";
- constant CMD_MEM_WRITE :std_logic_vector(3 downto 0) := "0111";
- constant CMD_RES_8 :std_logic_vector(3 downto 0) := "1000";
- constant CMD_RES_9 :std_logic_vector(3 downto 0) := "1001";
- constant CMD_CONF_READ :std_logic_vector(3 downto 0) := "1010";
- constant CMD_CONF_WRITE :std_logic_vector(3 downto 0) := "1011";
- constant CMD_MEM_READ_M :std_logic_vector(3 downto 0) := "1100";
- constant CMD_DU_ADR_CYC :std_logic_vector(3 downto 0) := "1101";
- constant CMD_MEN_READ_L :std_logic_vector(3 downto 0) := "1110";
- constant CMD_MEM_WRITE_I :std_logic_vector(3 downto 0) := "1111";
-
- signal CONFIG_ADDR :std_logic_vector(7 downto 0);
- signal CONFIG_WRITE :std_logic_vector(3 downto 0);
-
-
-begin
-
- --*******************************************************************
- --******************* PCI Write Configuration Address ***************
- --*******************************************************************
-
- CONFIG_ADDR(7 downto 0) <= ADDR_REG(7 downto 0);
-
-
- process (CF_WR_COM,IRDY_REGn,TRDYn,CONFIG_ADDR)
- begin
-
- if CF_WR_COM = '1' and IRDY_REGn = '0' and TRDYn = '0' then
-
- if CONFIG_ADDR = X"04" then
- CONFIG_WRITE <= "0001";
-
- elsif CONFIG_ADDR = X"10" then
- CONFIG_WRITE <= "0010";
-
- elsif CONFIG_ADDR = X"3C" then
- CONFIG_WRITE <= "0100";
-
- -- elsif CONFIG_ADDR = X"40" then
- -- CONFIG_WRITE <= "1000";
- else
- CONFIG_WRITE <= "0000";
- end if;
- else
- CONFIG_WRITE <= "0000";
- end if;
- end process;
-
- CONF_WR_04H <= CONFIG_WRITE(0);
- CONF_WR_10H <= CONFIG_WRITE(1);
- CONF_WR_3CH <= CONFIG_WRITE(2);
- --CONF_WR_40H <= CONFIG_WRITE(3);
-
-end architecture CONFIG_WR_0_DESIGN;