从站邻近设备的代码正常工作，和正常转发的代码能同时工作不会产生fifo上下溢出

tb/sw/src/clint.c

@@ -39,12 +39,13 @@ void disable_mtimer_int()
 
 void set_mtimer(uint32_t delta_t)
 {
+    #if 0
     uint64_t t;
-
+    
     t = read_mtimer();
     t += delta_t;
     set_mtimecmp(t);
-    #if 0
+    #else
     uint64_t t;
 
     t = *(volatile uint64_t *)(CLINT_BASE + CLINT_MTIME_LOW);