diff --git a/firmware/target/arm/rk27xx/system-rk27xx.c b/firmware/target/arm/rk27xx/system-rk27xx.c
index 8c75dee..234c6eb 100644
--- a/firmware/target/arm/rk27xx/system-rk27xx.c
+++ b/firmware/target/arm/rk27xx/system-rk27xx.c
@@ -200,19 +200,20 @@ void udelay(unsigned usecs)
     );
 }
 
-void commit_discard_idcache(void)
+static void __attribute__((noinline)) cache_invalidate_way(int way)
 {
-    /* invalidate cache way 0 */
-    CACHEOP = 0x02;
+    CACHEOP = ((way<<31)|0x2);
 
     /* wait for invalidate process to complete */
     while (CACHEOP & 0x03);
+}
 
+void commit_discard_idcache(void)
+{
+    /* invalidate cache way 0 */
+    cache_invalidate_way(0);
     /* invalidate cache way 1 */
-    CACHEOP = 0x80000002;
-
-    /* wait for invalidate process to complete */
-    while (CACHEOP & 0x03);   
+    cache_invalidate_way(1);
 }
 void commit_discard_dcache (void) __attribute__((alias("commit_discard_idcache")));