Lines Matching full:a2

30  *   a2:	new stack pointer, original value in depc
32  *   depc:	a2, original value saved on stack (PT_DEPC)
75 	wsr	a2, depc		# save a2
76 	l32i	a2, a3, EXC_TABLE_KSTK	# load kernel stack to a2
77 	s32i	a0, a2, PT_AREG0	# save a0 to ESF
79 	s32i	a0, a2, PT_DEPC		# mark it as a regular exception
102 	wsr	a2, depc		# save a2
103 	addi	a2, a1, -16-PT_SIZE	# adjust stack pointer
104 	s32i	a0, a2, PT_AREG0	# save a0 to ESF
106 	s32i	a0, a2, PT_DEPC		# mark it as a regular exception
154  *    exception handler should only use a2 as the stack pointer.
156  *  - If the fast handler manipulates the stack pointer (in a2), it has to
174  *	a2:	   trashed, original value in EXC_TABLE_DOUBLE_SAVE
213 	s32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
217 	rsr	a2, ps
218 	_bbsi.l	a2, PS_UM_BIT, 1f
229 	movi	a2, WINDOW_VECTORS_VADDR
230 	_bltu	a0, a2, .Lfixup
231 	addi	a2, a2, WINDOW_VECTORS_SIZE
232 	_bgeu	a0, a2, .Lfixup
236 	l32i	a2, a3, EXC_TABLE_KSTK
247 	 *	a2 = new sp based on KSTK from exc_table
260 	wsr	a2, depc		# save stack pointer temporarily
268 	xsr	a2, depc		# save a2 and get stack pointer
269 	s32i	a0, a2, PT_AREG0
272 	s32i	a0, a2, PT_DEPC		# mark it as a regular exception
286 .Lksp:	/* a0: a0, a1: a1, a2: a2, a3: trashed, depc: depc, excsave: a3 */
303 	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
313 	/* a0: depc, a1: a1, a2: trash, a3: exctable, depc: a0, excsave1: a3 */
317 	l32i	a2, a3, EXC_TABLE_FIXUP
319 	beq	a2, a3, .Lunrecoverable_fixup	# critical section
320 	beqz	a2, .Ldflt			# no handler was registered
322 	/* a0: depc, a1: a1, a2: trash, a3: exctable, depc: a0, excsave: a3 */
324 	jx	a2
328 	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
329 	addi	a2, a2, -PT_USER_SIZE
331 	/* a0: depc, a1: a1, a2: kstk, a3: exctable, depc: a0, excsave: a3 */
333 	s32i	a0, a2, PT_DEPC
336 	s32i	a0, a2, PT_AREG0
338 	/* a0: avail, a1: a1, a2: kstk, a3: exctable, depc: a2, excsave: a3 */
351 	 *	a2 = new sp based on KSTK from exc_table
373 	 * a0: depc, a1: a1, a2: kstk, a3: exc_table, depc: a0, excsave1: a3
376 	extui	a2, a0, 0, 6	# get offset into 64-byte vector handler
377 	beqz	a2, 1f		# if at start of vector, don't restore
389 	movi	a2, window_overflow_restore_a0_fixup
390 	s32i	a2, a3, EXC_TABLE_FIXUP
391 	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
415 	s32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
428 	rsr	a2, windowbase
429 	sub	a0, a2, a0
432 	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
450 	wsr	a2, depc
451 	l32i	a2, a3, EXC_TABLE_KSTK
452 	s32i	a0, a2, PT_AREG0
455 	s32i	a0, a2, PT_DEPC
504  * a2: trashed, original value in EXC_TABLE_DOUBLE_SAVE
515 	rsr	a2, windowbase
516 	sub	a0, a2, a0
518 	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
530 	wsr	a2, depc
531 	l32i	a2, a3, EXC_TABLE_KSTK
532 	s32i	a0, a2, PT_AREG0
535 	s32i	a0, a2, PT_DEPC
557 	s32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
558 	movi	a2, window_overflow_restore_a0_fixup
559 	s32i	a2, a3, EXC_TABLE_FIXUP
560 	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
577 	s32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
578 	movi	a2, 0
579 	s32i	a2, a3, EXC_TABLE_FIXUP
580 	l32i	a2, a3, EXC_TABLE_DOUBLE_SAVE
677 	s32e	a2, a5,  -8
710 	l32e	a2, a5,  -8
722 	s32e	a2, a9,  -8
740 	l32e	a2, a9,  -8
757 	s32e	a2,  a13,  -8
778 	l32e	a2,  a13,  -8