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 := 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 pointer_count is std_logic_vector(PCOUNT-1 downto 0);
+subtype paddr_t is std_logic_vector(log2c(PCOUNT)-1 downto 0);
type extmod_rec is record
sel : std_logic;
wr_en : std_logic;
- byte_en : std_logic_vector(gp_register_t'length/byte_t'length-1 downto 0);
+ byte_en : byte_en_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"FFFFFFA";
+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_GPM_ADDR: ext_addrid_t := x"FFFFFFF";
-
-
+-- 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;