clean up source code

Author: Wayne Ren

inc/arc/arc.h

@@ -192,13 +192,15 @@
 #define AUX_STATUS_BIT_U		(7)	/*!< user mode */
 #define AUX_STATUS_BIT_L		(12)	/*!< zero-overhead loop enable */
 #define AUX_STATUS_BIT_IE		(31)	/*!< interrupt enable */
+#define AUX_STATUS_BIT_HALT		(0)	/*!< halt bit */
 
 /* masks correspond to STATUS32 bit-field */
 #define AUX_STATUS_MASK_AE		(1<<AUX_STATUS_BIT_AE)	/*!< mask of AUX_STATUS_BIT_AE */
 #define AUX_STATUS_MASK_DE		(1<<AUX_STATUS_BIT_DE)	/*!< mask of AUX_STATUS_BIT_DE */
 #define AUX_STATUS_MASK_U		(1<<AUX_STATUS_BIT_U)	/*!< mask of AUX_STATUS_BIT_U */
 #define AUX_STATUS_MASK_L		(1<<AUX_STATUS_BIT_L)	/*!< mask of AUX_STATUS_BIT_L */
 #define AUX_STATUS_MASK_IE		(1<<AUX_STATUS_BIT_IE)	/*!< mask of AUX_STATUS_BIT_IE */
+#define AUX_STATUS_MASK_HALT		(1<<AUX_STATUS_BIT_HALT) /*!< mask of AUX_STATUS_BIT_HALT */
 /** @} */
 
 /**

library/secureshield/core/src/v1/secureshield_entry.s

@@ -178,7 +178,7 @@ _int_handler_1:
  * come back to container sp, secureshield stack will not be used
  */
 	POP	sp
-	kflag	0x20	/* take interrupt as exception, return as an exception */
+	kflag	AUX_STATUS_MASK_AE	/* take interrupt as exception, return as an exception */
 
 	cmp	r0, 0
 	beq	_ret_int_unprivileged_no_cx