experimental

vhdl/rtl/vhdl/io_register.vhd

@@ -6,18 +6,15 @@ PACKAGE io_register_pkg IS
     TYPE access_width_t IS (LONGWORD, WORD, BYTE);
     
     COMPONENT io_register IS
-    /*
         GENERIC
         (
-            NULL
+            address         : IN UNSIGNED (31 DOWNTO 0);
+            address_mask    : IN UNSIGNED (31 DOWNTO 0)
         );
-    */
         PORT
         (
-            adress          : IN UNSIGNED (31 DOWNTO 0);
+            address_bus     : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
-            address_mask    : IN UNSIGNED (31 DOWNTO 0);
+            access_type     : IN access_width_t            
-            access_type     : IN access_width_t
-            
         );
     END COMPONENT;
 END PACKAGE;
@@ -30,20 +27,25 @@ LIBRARY work;
     USE work.io_register_pkg.ALL;
     
 ENTITY io_register IS
-/*
     GENERIC
     (
-        NULL
+        address         : IN UNSIGNED (31 DOWNTO 0);
+        address_mask    : IN UNSIGNED (31 DOWNTO 0)
     );
-*/
     PORT
     (
-        adress          : IN UNSIGNED (31 DOWNTO 0);
+        address_bus     : IN STD_LOGIC_VECTOR (31 DOWNTO 0);
-        address_mask    : IN UNSIGNED (31 DOWNTO 0);
         access_type     : IN access_width_t
     );
 END ENTITY io_register;
 
 ARCHITECTURE rtl OF io_register IS
+    SIGNAL sel          : STD_LOGIC := '0';
 BEGIN
+    register_select : PROCESS
+    BEGIN
+        IF address_bus AND address_mask = address AND address_mask THEN
+            sel <= '1';
+        END IF;
+    END PROCESS register_select;
 END rtl;