use IEEE.std_logic_1164.all;
entity CONFIG_04H is
- port
- (
- PCI_CLOCK :in std_logic;
- PCI_RSTn :in std_logic;
- SERR :in std_logic;
- PERR :in std_logic;
- AD_REG :in std_logic_vector(31 downto 0);
- CBE_REGn :in std_logic_vector( 3 downto 0);
- CONF_WR_04H :in std_logic;
- CONF_DATA_04H :out std_logic_vector(31 downto 0)
- );
+ port
+ (
+ PCI_CLOCK :in std_logic;
+ PCI_RSTn :in std_logic;
+ SERR :in std_logic;
+ PERR :in std_logic;
+ AD_REG :in std_logic_vector(31 downto 0);
+ CBE_REGn :in std_logic_vector( 3 downto 0);
+ CONF_WR_04H :in std_logic;
+ CONF_DATA_04H :out std_logic_vector(31 downto 0)
+ );
end entity CONFIG_04H;
architecture CONFIG_04H_DESIGN of CONFIG_04H is
- signal CONF_STATUS :std_logic_vector(31 downto 16);
- signal CONF_COMMAND :std_logic_vector(15 downto 0);
-
+ signal CONF_STATUS :std_logic_vector(31 downto 16);
+ signal CONF_COMMAND :std_logic_vector(15 downto 0);
begin
---*******************************************************************
---************* PCI Configuration Space Header "STATUS" *************
---*******************************************************************
-
- CONF_STATUS(20 downto 16) <= "00000" ;-- Reserved
- CONF_STATUS(21 ) <= '0' ;-- MAS/TAR: "R_O" :'0'= 33MHz / '1'= 66MHz
- CONF_STATUS(22 ) <= '0' ;-- MAS/TAR: "R_O"
- CONF_STATUS(23 ) <= '0' ;-- ???/???: "R_O" : fast back-to-back
- CONF_STATUS(24 ) <= '0' ;-- Master :
---CONF_STATUS(26 downto 25) <= "00" ;-- Mas/Tar: "R_O" : timing fast for "DEVSEL"
- CONF_STATUS(26 downto 25) <= "01" ;-- Mas/Tar: "R_O" : timing medium for "DEVSEL"
---CONF_STATUS(26 downto 25) <= "10" ;-- Mas/Tar: "R_O" : timing slow for "DEVSEL"
---CONF_STATUS(26 downto 25) <= "11" ;-- Mas/Tar: "R_O" : reserved
- CONF_STATUS(27 ) <= '0' ;-- Target : "R_W" : Taget-Abort
- CONF_STATUS(28 ) <= '0' ;-- Master : "R_W" : Taget-Abort
- CONF_STATUS(29 ) <= '0' ;-- Master : "R_W" : Master-Abort
---CONF_STATUS(30 ) <= SERR ;-- Mas/Tar: "R_W" : SERR
---CONF_STATUS(31 ) <= PERR ;-- Mas/Tar: "R_W" : PERR
-
- process (PCI_CLOCK,PCI_RSTn)
- begin
- if PCI_RSTn = '0' then CONF_STATUS(30) <= '0';
- CONF_STATUS(31) <= '0';
-
- elsif (PCI_CLOCK'event and PCI_CLOCK = '1') then
-
- if CONF_WR_04H = '1' and CBE_REGn(3) = '0' then
-
- CONF_STATUS(30) <= not (AD_REG(30) and CONF_STATUS(30));
- CONF_STATUS(31) <= not (AD_REG(31) and CONF_STATUS(31));
-
- else CONF_STATUS(30) <= SERR or CONF_STATUS(30);
- CONF_STATUS(31) <= PERR or CONF_STATUS(31);
-
- end if;
- end if;
- end process;
-
---*******************************************************************
---*********** PCI Configuration Space Header "COMMAND" **************
---*******************************************************************
-
--- CONF_COMMAND( 0) <= '0';-- I/O Space accesses ???
--- CONF_COMMAND( 1) <= '0';-- Mem Space accesses ???
--- CONF_COMMAND( 2) <= '0';-- abillity to act as a master on the PCI bus
--- CONF_COMMAND( 3) <= '0';-- Special Cycle ???
--- CONF_COMMAND( 4) <= '0';-- Master ???
--- CONF_COMMAND( 5) <= '0';-- VGA ???
--- CONF_COMMAND( 6) <= '0';-- Party checking enable/disable
- CONF_COMMAND( 7) <= '0';-- address/data stepping ???
--- CONF_COMMAND( 8) <= '0';-- enable/disable "PCI_SERRn"
--- CONF_COMMAND( 9) <= '0';-- fast back-to-back
--- CONF_COMMAND(10) <= '0';-- Reserved
--- CONF_COMMAND(11) <= '0';-- Reserved
--- CONF_COMMAND(12) <= '0';-- Reserved
--- CONF_COMMAND(13) <= '0';-- Reserved
--- CONF_COMMAND(14) <= '0';-- Reserved
--- CONF_COMMAND(15) <= '0';-- Reserved
-
- process (PCI_CLOCK,PCI_RSTn)
- begin
- if PCI_RSTn = '0' then CONF_COMMAND(15 downto 8) <= (others =>'0');
- CONF_COMMAND( 6 downto 0) <= (others =>'0');
-
- elsif (PCI_CLOCK'event and PCI_CLOCK = '1') then
-
- if CONF_WR_04H = '1'and CBE_REGn(1) = '0' then
-
- CONF_COMMAND(15 downto 8) <= AD_REG(15 downto 8);
- else CONF_COMMAND(15 downto 8) <= CONF_COMMAND(15 downto 8);
- end if;
-
-
- if CONF_WR_04H = '1'and CBE_REGn(0) = '0' then
-
- CONF_COMMAND( 6 downto 0) <= AD_REG( 6 downto 0);
- else CONF_COMMAND( 6 downto 0) <= CONF_COMMAND( 6 downto 0);
- end if;
-
- end if;
- end process;
-
- CONF_DATA_04H <= CONF_STATUS & CONF_COMMAND;
+ --*******************************************************************
+ --************* PCI Configuration Space Header "STATUS" *************
+ --*******************************************************************
+
+ CONF_STATUS(20 downto 16) <= "00000";-- Reserved
+ CONF_STATUS(21 ) <= '0';-- MAS/TAR: "R_O" :'0'= 33MHz / '1'= 66MHz
+ CONF_STATUS(22 ) <= '0';-- MAS/TAR: "R_O"
+ CONF_STATUS(23 ) <= '0';-- ???/???: "R_O" : fast back-to-back
+ CONF_STATUS(24 ) <= '0';-- Master :
+ --CONF_STATUS(26 downto 25) <= "00";-- Mas/Tar: "R_O" : timing fast for "DEVSEL"
+ CONF_STATUS(26 downto 25) <= "01";-- Mas/Tar: "R_O" : timing medium for "DEVSEL"
+ --CONF_STATUS(26 downto 25) <= "10";-- Mas/Tar: "R_O" : timing slow for "DEVSEL"
+ --CONF_STATUS(26 downto 25) <= "11";-- Mas/Tar: "R_O" : reserved
+ CONF_STATUS(27 ) <= '0';-- Target : "R_W" : Taget-Abort
+ CONF_STATUS(28 ) <= '0';-- Master : "R_W" : Taget-Abort
+ CONF_STATUS(29 ) <= '0';-- Master : "R_W" : Master-Abort
+ --CONF_STATUS(30 ) <= SERR;-- Mas/Tar: "R_W" : SERR
+ --CONF_STATUS(31 ) <= PERR;-- Mas/Tar: "R_W" : PERR
+
+ process (PCI_CLOCK,PCI_RSTn)
+ begin
+ if PCI_RSTn = '0' then
+ CONF_STATUS(30) <= '0';
+ CONF_STATUS(31) <= '0';
+
+ elsif (PCI_CLOCK'event and PCI_CLOCK = '1') then
+ if CONF_WR_04H = '1' and CBE_REGn(3) = '0' then
+ CONF_STATUS(30) <= not (AD_REG(30) and CONF_STATUS(30));
+ CONF_STATUS(31) <= not (AD_REG(31) and CONF_STATUS(31));
+
+ else
+ CONF_STATUS(30) <= SERR or CONF_STATUS(30);
+ CONF_STATUS(31) <= PERR or CONF_STATUS(31);
+
+ end if;
+ end if;
+end process;
+
+ --*******************************************************************
+ --*********** PCI Configuration Space Header "COMMAND" **************
+ --*******************************************************************
+
+-- CONF_COMMAND( 0) <= '0';-- I/O Space accesses ???
+-- CONF_COMMAND( 1) <= '0';-- Mem Space accesses ???
+-- CONF_COMMAND( 2) <= '0';-- abillity to act as a master on the PCI bus
+-- CONF_COMMAND( 3) <= '0';-- Special Cycle ???
+-- CONF_COMMAND( 4) <= '0';-- Master ???
+-- CONF_COMMAND( 5) <= '0';-- VGA ???
+-- CONF_COMMAND( 6) <= '0';-- Party checking enable/disable
+CONF_COMMAND( 7) <= '0';-- address/data stepping ???
+-- CONF_COMMAND( 8) <= '0';-- enable/disable "PCI_SERRn"
+-- CONF_COMMAND( 9) <= '0';-- fast back-to-back
+-- CONF_COMMAND(10) <= '0';-- Reserved
+-- CONF_COMMAND(11) <= '0';-- Reserved
+-- CONF_COMMAND(12) <= '0';-- Reserved
+-- CONF_COMMAND(13) <= '0';-- Reserved
+-- CONF_COMMAND(14) <= '0';-- Reserved
+-- CONF_COMMAND(15) <= '0';-- Reserved
+
+process (PCI_CLOCK,PCI_RSTn)
+begin
+ if PCI_RSTn = '0' then
+ CONF_COMMAND(15 downto 8) <= (others =>'0');
+ CONF_COMMAND( 6 downto 0) <= (others =>'0');
+
+ elsif (PCI_CLOCK'event and PCI_CLOCK = '1') then
+
+ if CONF_WR_04H = '1'and CBE_REGn(1) = '0' then
+ CONF_COMMAND(15 downto 8) <= AD_REG(15 downto 8);
+ else
+ CONF_COMMAND(15 downto 8) <= CONF_COMMAND(15 downto 8);
+ end if;
+
+ if CONF_WR_04H = '1'and CBE_REGn(0) = '0' then
+ CONF_COMMAND( 6 downto 0) <= AD_REG( 6 downto 0);
+ else
+ CONF_COMMAND( 6 downto 0) <= CONF_COMMAND( 6 downto 0);
+ end if;
+ end if;
+end process;
+
+CONF_DATA_04H <= CONF_STATUS & CONF_COMMAND;
end architecture CONFIG_04H_DESIGN;
projects / raggedstone / blobdiff