use IEEE.numeric_std.all;
use work.common_pkg.all;
-
+--use work.alu_pkg.all;
+--use work.gpm_pkg.all;
package extension_pkg is
+constant EXTWORDL : integer := log2c(4);
+constant BYTEADDR : integer := log2c(4);
+constant PCOUNT : integer := 3;
+constant EXTWORDS : integer := EXTWORDL + BYTEADDR;
+
+subtype ext_addrid_t is std_logic_vector(gp_register_t'high - EXTWORDS downto 0);
+subtype ext_addr_t is std_logic_vector((gp_register_t'high-BYTEADDR) downto 0);
+subtype paddr_t is std_logic_vector(log2c(PCOUNT)-1 downto 0);
+
type extmod_rec is record
- clk : std_logic;
- reset : std_logic;
sel : std_logic;
-
wr_en : std_logic;
byte_en : std_logic_vector(gp_register_t'length/byte_t'length-1 downto 0);
- data : data_ram_word_t;
- addr : data_addr_t;
+ data : gp_register_t;
+ addr : ext_addr_t;
end record;
-
-
+
+
+type status_rec is record
+ zero : std_logic;
+ oflo : std_logic;
+ sign : std_logic;
+ carry : std_logic;
+end record;
+
+constant EXT_7SEG_ADDR: ext_addrid_t := x"0000201";
+constant EXT_EXTMEM_ADDR: ext_addrid_t := x"FFFFFFB";
+constant EXT_TIMER_ADDR: ext_addrid_t := x"FFFFFFC";
+constant EXT_AC97_ADDR: ext_addrid_t := x"FFFFFFD";
+-- constant EXT_UART_ADDR: ext_addrid_t := x"FFFFFFE";
+constant EXT_UART_ADDR: ext_addrid_t := x"0000200";
+constant EXT_GPMP_ADDR: ext_addrid_t := x"FFFFFFF";
+
+ component extension_gpm is
+ --some modules won't need all inputs/outputs
+ generic (
+ -- active reset value
+ RESET_VALUE : std_logic
+ );
+ port(
+ --System inputs
+ clk : in std_logic;
+ reset : in std_logic;
+ -- general extension interface
+ ext_reg : in extmod_rec;
+ data_out : out gp_register_t;
+ -- Input
+ psw_nxt : in status_rec;
+ paddr : in paddr_t;
+ pinc : in std_logic;
+ pwr_en : in std_logic;
+ -- Ouput
+ psw : out status_rec;
+ pval : out gp_register_t;
+ pval_nxt : out gp_register_t
+ );
+ end component extension_gpm;
+
+
+
end package extension_pkg;