memory interface refactoring

hw/rtl/interfaces/VX_mem_req_if.v

@@ -0,0 +1,23 @@
+`ifndef VX_CACHE_MEM_REQ_IF
+`define VX_CACHE_MEM_REQ_IF
+
+`include "../cache/VX_cache_define.vh"
+
+interface VX_cache_mem_req_if #(
+    parameter MEM_LINE_WIDTH = 1,
+    parameter MEM_ADDR_WIDTH = 1,
+    parameter MEM_TAG_WIDTH  = 1,
+    parameter MEM_LINE_SIZE  = MEM_LINE_WIDTH / 8
+) ();
+
+    wire                        valid;    
+    wire                        rw;    
+    wire [MEM_LINE_SIZE-1:0]    byteen;
+    wire [MEM_ADDR_WIDTH-1:0]   addr;
+    wire [MEM_LINE_WIDTH-1:0]   data;  
+    wire [MEM_TAG_WIDTH-1:0]    tag;  
+    wire                        ready;
+
+endinterface
+
+`endif