migrated 100% to modelsim

rtl/modelsim/vortex_dpi.h

@@ -0,0 +1,8 @@
+
+extern "C" {
+    void load_file   (char * filename);
+    void ibus_driver (bool clk, unsigned pc_addr, unsigned * instruction);
+    void dbus_driver (bool clk, unsigned o_m_read_addr, unsigned o_m_evict_addr, bool o_m_valid, svLogicVecVal * o_m_writedata, bool o_m_read_or_write, svOpenArrayHandle * i_m_readdata, bool * i_m_ready);
+    void io_handler  (bool clk, bool io_valid, unsigned io_data);
+    void gracefulExit();
+}