3 use IEEE.std_logic_1164.all;
4 use IEEE.numeric_std.all;
6 use work.common_pkg.all;
9 package extension_pkg is
11 constant EXTWORDL : integer := log2c(4);
12 constant BYTEADDR : integer := log2c(4);
13 constant PCOUNT : integer := log2c(4);
14 constant EXTWORDS : integer := EXTWORDL + BYTEADDR;
16 subtype ext_addrid_t is std_logic_vector(gp_register_t'high - EXTWORDS downto 0);
17 subtype ext_addr_t is std_logic_vector((gp_register_t'high-BYTEADDR) downto 0);
18 subtype pointer_count is std_logic_vector(PCOUNT-1 downto 0);
20 type extmod_rec is record
23 byte_en : std_logic_vector(gp_register_t'length/byte_t'length-1 downto 0);
31 constant EXT_7SEG_ADDR: ext_addrid_t := x"FFFFFFA";
32 constant EXT_EXTMEM_ADDR: ext_addrid_t := x"FFFFFFB";
33 constant EXT_TIMER_ADDR: ext_addrid_t := x"FFFFFFC";
34 constant EXT_AC97_ADDR: ext_addrid_t := x"FFFFFFD";
35 constant EXT_UART_ADDR: ext_addrid_t := x"FFFFFFE";
36 constant EXT_GPMP_ADDR: ext_addrid_t := x"FFFFFFF";
38 component extension is
39 --some modules won't need all inputs/outputs
42 RESET_VALUE : std_logic
49 ext_reg : in extmod_rec;
50 pointer : in pointer_count;
51 dec_inc : in std_logic;
54 data_out : out gp_register_t;
55 pointer_val : out gp_register_t
58 end component extension;
62 end package extension_pkg;