X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/raggedstone/blobdiff_plain/0b6ed0d89260ade25dc0c2dc9fb8aa154fabd6a1..30273618403fd6512926c89f999f97b4722e1709:/dhwk/source/pci/data_mux.vhd

diff --git a/dhwk/source/pci/data_mux.vhd b/dhwk/source/pci/data_mux.vhd
new file mode 100644
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--- /dev/null
+++ b/dhwk/source/pci/data_mux.vhd
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+-- J.STELZNER
+-- INFORMATIK-3 LABOR
+-- 23.08.2006
+-- File: DATA_MUX.VHD
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+entity DATA_MUX is
+        port
+        (
+                READ_SEL :in std_logic_vector( 1 downto 0);
+                ADDR_REG :in std_logic_vector(31 downto 0);
+                CBE_REGn :in std_logic_vector( 3 downto 0);
+                MUX_IN_XX0 :in std_logic_vector( 7 downto 0);
+                MUX_IN_XX1 :in std_logic_vector( 7 downto 0);
+                MUX_IN_XX2 :in std_logic_vector( 7 downto 0);
+                MUX_IN_XX3 :in std_logic_vector( 7 downto 0);
+                MUX_IN_XX4 :in std_logic_vector( 7 downto 0);
+                MUX_IN_XX5 :in std_logic_vector( 7 downto 0);
+                MUX_IN_XX6 :in std_logic_vector( 7 downto 0);
+                MUX_IN_XX7 :in std_logic_vector( 7 downto 0);
+                MUX_OUT :out std_logic_vector(31 downto 0);
+                READ_XX1_0 :out std_logic;
+                READ_XX3_2 :out std_logic;
+                READ_XX5_4 :out std_logic;
+                READ_XX7_6 :out std_logic
+                --READ_FIFO :out std_logic
+        );
+end entity DATA_MUX;
+
+architecture DATA_MUX_DESIGN of DATA_MUX is
+
+        signal MUX :std_logic_vector(31 downto 0);
+        signal SEL :std_logic_vector( 7 downto 0);
+
+        signal SIG_READ_XX1_0 :std_logic;
+        signal SIG_READ_XX3_2 :std_logic;
+        signal SIG_READ_XX5_4 :std_logic;
+        signal SIG_READ_XX7_6 :std_logic;
+
+begin
+
+        SEL <= ADDR_REG(3 downto 2) & CBE_REGn & READ_SEL;
+
+        SIG_READ_XX1_0 <= '1' when SEL = "00110011" else '0';
+        SIG_READ_XX3_2 <= '1' when SEL = "00001111" else '0';
+        SIG_READ_XX5_4 <= '1' when SEL = "01110011" else '0';
+        SIG_READ_XX7_6 <= '1' when SEL = "01001111" else '0';
+
+        MUX <= (X"00" & X"00" & MUX_IN_XX1 & MUX_IN_XX0) when SIG_READ_XX1_0 = '1' else
+               (MUX_IN_XX3 & MUX_IN_XX2 & X"00" & X"00" ) when SIG_READ_XX3_2 = '1' else
+               (X"00" & X"00" & MUX_IN_XX5 & MUX_IN_XX4) when SIG_READ_XX5_4 = '1' else
+               (MUX_IN_XX7 & MUX_IN_XX6 & X"00" & X"00" ) when SIG_READ_XX7_6 = '1' else
+               (others => '0');
+
+
+ -- MUX <= (X"01" & X"23" & MUX_IN_XX1 & MUX_IN_XX0) when SIG_READ_XX1_0 = '1' else
+ -- (MUX_IN_XX3 & MUX_IN_XX2 & X"45" & X"67" ) when SIG_READ_XX3_2 = '1' else
+ -- (X"89" & X"AB" & MUX_IN_XX5 & MUX_IN_XX4) when SIG_READ_XX5_4 = '1' else
+ -- (MUX_IN_XX7 & MUX_IN_XX6 & X"CD" & X"EF" ) when SIG_READ_XX7_6 = '1' else
+ -- (others => '0');
+
+
+        MUX_OUT <= MUX;
+
+
+        READ_XX1_0 <= SIG_READ_XX1_0;
+        READ_XX3_2 <= SIG_READ_XX3_2;
+        READ_XX5_4 <= SIG_READ_XX5_4;
+        READ_XX7_6 <= SIG_READ_XX7_6;
+
+--READ_FIFO <= SIG_READ_XX3_2 or SIG_READ_XX5_4;--SIG_READ_XX5_4 nur fuer test
+
+end architecture DATA_MUX_DESIGN;