move config space header into pci core directory
[raggedstone] / dhwk / source / Io_mux.vhd
1 -- J.STELZNER
2 -- INFORMATIK-3 LABOR
3 -- 23.08.2006
4 -- File: IO_MUX.VHD
5
6 library IEEE;
7 use IEEE.std_logic_1164.all;
8
9 entity IO_MUX is
10 port
11 (
12 READ_SEL :in std_logic_vector ( 1 downto 0);
13 USER_DATA :in std_logic_vector (31 downto 0);
14 CONFIG_DATA :in std_logic_vector (31 downto 0);
15 PCI_AD :in std_logic_vector (31 downto 0);
16 IO_DATA :out std_logic_vector (31 downto 0)
17 );
18 end entity IO_MUX;
19
20 architecture IO_MUX_DESIGN of IO_MUX is
21
22 signal MUX :std_logic_vector (31 downto 0);
23
24 begin
25
26 MUX <= PCI_AD when READ_SEL = "00" else -- WRITE_CONFIG
27 PCI_AD when READ_SEL = "01" else -- WRITE_IO
28 CONFIG_DATA when READ_SEL = "10" else -- READ_CONFIG
29 USER_DATA when READ_SEL = "11" else -- READ_IO
30 CONFIG_DATA;
31
32 -- MUX;
33
34 IO_DATA <= MUX;
35
36 end architecture IO_MUX_DESIGN;
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