extension: entity + splitter zur adressierung

[calu.git] / cpu / src / extension_pkg.vhd

diff --git a/cpu/src/extension_pkg.vhd b/cpu/src/extension_pkg.vhd
index be46852dbdaeb06ba218cb94f5b349e4acd0e7ac..af6ae700ea1a55aa1bbae402937b29bb01b40377 100644 (file)
--- a/cpu/src/extension_pkg.vhd
+++ b/cpu/src/extension_pkg.vhd
@@ -8,16 +8,35 @@ use work.common_pkg.all;
 
 package extension_pkg is
 
+constant EXTWORDL : integer := log2c(4);
+constant BYTEADDR : integer := log2c(4);
+constant PCOUNT   : integer := log2c(4);
+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);   
+
         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 : gp_register_t;
-                addr : gp_register_t;          
+                addr : ext_addr_t;     
         end record; 
-       
-       
+
+
+
+
+constant EXT_7SEG_ADDR:   ext_addrid_t := x"FFFFFFA";
+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";
+
+
+
+
+
 end package extension_pkg;