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- increased window for RX/TX-Data to 32 kByte. Offset is at 0x8000..0x8FFC

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git-svn-id: http://moon:8086/svn/vhdl/trunk@909 cc03376c-175c-47c8-b038-4cd826a8556b
This commit is contained in:
jens
2010-04-10 12:04:18 +00:00
parent 0af5d4e58c
commit 197e65fc28
2 changed files with 55 additions and 34 deletions
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lib/emac/src/emac_top_jb.vhd
+54 -33
View File
@@ -64,19 +64,40 @@ ARCHITECTURE behavior OF emac_top_jb IS
signal ready : std_logic;
signal read : std_logic;
signal write : std_logic;
signal data_read : std_logic;
signal data_write : std_logic;
signal reg_read : std_logic;
signal reg_write : std_logic;
signal reg_addr : unsigned(3 downto 0);
begin
SRDY_O <= CYC_I and ready;
mii_gtx_clk <= '0';
mii_gtx_clk <= '0';
ready <= not tx_ctrl_in.pkt_alloc_en;
SRDY_O <= CYC_I and ready;
read <= STB_I and CYC_I and not WE_I;
write <= STB_I and CYC_I and WE_I;
data_read <= read and ADDR_I(15);
data_write <= write and ADDR_I(15);
reg_read <= read and not ADDR_I(15);
reg_write <= write and not ADDR_I(15);
reg_addr <= ADDR_I(5 downto 2);
ready <= not tx_ctrl_in.pkt_alloc_en;
tx_din_vld <= data_write;
tx_din <= DAT_I;
rx_ctrl_in.pkt_read_en <= data_read;
------------------------------------------------------------------
registers_write:
process(CLK_I)
begin
if rising_edge(CLK_I) then
tx_din_vld <= '0';
tx_ctrl_in.pkt_alloc_en <= '0';
tx_ctrl_in.pkt_commit_en <= '0';
tx_ctrl_in.reset <= '0';
@@ -93,9 +114,11 @@ registers_write:
rx_ctrl_in.Gbps_en <= '0';
tx_ctrl_in.fcs_gen_en <= '0';
rx_ctrl_in.fcs_chk_en <= '0';
elsif (STB_I and CYC_I and WE_I) = '1' then
case ADDR_I(5 downto 2) is
elsif reg_write = '1' then
-- 0x0000 .. 0x003C
case reg_addr is
-- 0x0000
when "0000" =>
rx_ctrl_in.reset <= DAT_I(31);
@@ -105,10 +128,10 @@ registers_write:
rx_ctrl_in.pkt_req_en <= DAT_I(17);
rx_ctrl_in.pkt_free_en <= DAT_I(16);
rx_int_en <= DAT_I(4);
-- 0x0004
-- rx_size R/O
-- 0x0008
when "0010" =>
tx_ctrl_in.reset <= DAT_I(31);
@@ -117,14 +140,14 @@ registers_write:
tx_ctrl_in.pkt_alloc_en <= DAT_I(17);
tx_ctrl_in.pkt_commit_en <= DAT_I(16);
tx_int_en <= DAT_I(4);
-- 0x000C
when "0011" =>
tx_ctrl_in.tx_size <= DAT_I(15 downto 0);
-- 0x0010
-- Gap
-- 0x0014
-- Gap
@@ -134,20 +157,18 @@ registers_write:
rx_ctrl_in.mac_addr(1) <= DAT_I(23 downto 16);
rx_ctrl_in.mac_addr(2) <= DAT_I(15 downto 8);
rx_ctrl_in.mac_addr(3) <= DAT_I(7 downto 0);
-- 0x001C
when "0111" =>
rx_ctrl_in.mac_addr(4) <= DAT_I(31 downto 24);
rx_ctrl_in.mac_addr(5) <= DAT_I(23 downto 16);
-- 0x0020 .. 0x003C
-- Window for TX-Data (8 words)
-- For cached burst access, this must be greater or equal to D-Cache line size
when others =>
tx_din_vld <= '1';
tx_din <= DAT_I;
-- Gap
when others => null;
end case;
end if;
end if;
end process;
@@ -156,11 +177,12 @@ registers_read:
process(CLK_I)
begin
if rising_edge(CLK_I) then
rx_ctrl_in.pkt_read_en <= '0';
ACK_O <= rx_dout_vld and CYC_I and not WE_I;
ACK_O <= rx_dout_vld;
DAT_O <= rx_dout;
if (STB_I and CYC_I) = '1' and WE_I = '0' then
case ADDR_I(5 downto 2) is
if reg_read = '1' then
-- 0x0000 .. 0x003C
case reg_addr is
-- 0x0000
when "0000" =>
@@ -175,7 +197,7 @@ registers_read:
DAT_O(17) <= rx_ctrl_out.pkt_valid;
DAT_O(16) <= rx_ctrl_out.pkt_avail;
DAT_O(4) <= rx_int_en;
-- 0x0004
when "0001" =>
ACK_O <= '1';
@@ -192,7 +214,7 @@ registers_read:
DAT_O(17) <= tx_ctrl_out.pkt_alloc_req;
DAT_O(16) <= tx_ctrl_out.pkt_armed;
DAT_O(4) <= tx_int_en;
-- 0x000C
when "0011" =>
ACK_O <= '1';
@@ -200,7 +222,7 @@ registers_read:
-- 0x0010
-- Gap
-- 0x0014
-- Gap
@@ -208,19 +230,18 @@ registers_read:
when "0110" =>
ACK_O <= '1';
DAT_O <= rx_ctrl_in.mac_addr(0) & rx_ctrl_in.mac_addr(1) & rx_ctrl_in.mac_addr(2) & rx_ctrl_in.mac_addr(3);
-- 0x001C
when "0111" =>
ACK_O <= '1';
DAT_O <= rx_ctrl_in.mac_addr(4) & rx_ctrl_in.mac_addr(5) & X"0000";
-- 0x0020 .. 0x003C
-- Window for RX-Data (8 words)
-- For cached burst access, this must be greater or equal to D-Cache line size
when others =>
rx_ctrl_in.pkt_read_en <= '1';
-- Gap
when others => null;
end case;
end if;
end if;
end process;
lib/emac/src/tb_emac_top_jb.vhd
+1 -1
View File
@@ -88,7 +88,7 @@ ARCHITECTURE behavior OF tb_emac_top_jb IS
constant RX_SIZE_REG_ADDR : unsigned(31 downto 0) := X"0000_0004";
constant TX_STATUS_REG_ADDR : unsigned(31 downto 0) := X"0000_0008";
constant TX_SIZE_REG_ADDR : unsigned(31 downto 0) := X"0000_000C";
constant DATA_REG_ADDR : unsigned(31 downto 0) := X"0000_0010";
constant DATA_REG_ADDR : unsigned(31 downto 0) := X"0000_8000";
BEGIN