xtensa/cpu/start.S

62 1:	l32r	a2, 2b
63 	jx	a2
133 	movi	a2, 1
135 	movi	a2, XCHAL_EXCM_LEVEL
137 	wsr	a2, PS
142 	___unlock_dcache_all a2, a3
143 	___invalidate_dcache_all a2, a3
144 	___unlock_icache_all a2, a3
145 	___invalidate_icache_all a2, a3
151 	movi	a2, __reloc_table_start
154 1:	beq	a2, a3, 3f	# no more entries?
155 	l32i	a4, a2, 0	# start destination (in RAM)
156 	l32i	a5, a2, 4	# end destination (in RAM)
157 	l32i	a6, a2, 8	# start source (in ROM)
158 	addi	a2, a2, 12	# next entry
201 	movi	a2, XCHAL_EXCM_LEVEL
203 	movi	a2, (1<<PS_WOE_BIT) | XCHAL_EXCM_LEVEL
205 	wsr	a2, PS
210 	___flush_dcache_all a2, a3
242 	mov	a2, sp
244 	mov	sp, a2
266 	movi	a2, 0
281  * a2 = addr_sp
292 	mov	a1, a2
293 	mov	a2, a3
312 	addi	sp, a2, -16
341 	wsr	a2, EXCSAVE1
342 	movi	a2, ExceptionHandler
343 	jx	a2
349 	wsr	a2, EXCSAVE1
350 	movi	a2, ExceptionHandler
351 	jx	a2
375 	rsr	a2, EXCCAUSE		# find handler
380 	bnei	a2, 5, 1f		# jump if not alloca exception
383 	s32i	a3, a1, 0		# and save a3 (a2 still in excsave1)
384 	movi	a2, fast_alloca_exception
385 	jx	a2			# jump to fast_alloca_exception
391 1:	addi	a2, a1, - PT_SIZE - 16
392 	s32i	a0, a2, PT_AREG + 0 * 4
393 	s32i	a1, a2, PT_AREG + 1 * 4
394 	s32i	a3, a2, PT_AREG + 3 * 4
396 	s32i	a3, a2, PT_AREG + 2 * 4
397 	mov	a1, a2
417 	rsr	a2, WINDOWSTART
418 	s32i	a2, a1, PT_WINDOWSTART
421 	rsr	a2, SAR
424 	s32i	a2, a1, PT_SAR
429 	movi	a2, 0
431 	xsr	a2, LCOUNT
434 	s32i	a2, a1, PT_LCOUNT
441 	rsr	a2, EXCCAUSE
451 	s32i	a2, a1, PT_EXCCAUSE
455 	addx4	a0, a2, a0
458 	mov	a2, a1			# Provide stack frame as only argument
473 	l32i	a2, a1, PT_LBEG
476 	wsr	a2, LBEG
481 	l32i	a2, a1, PT_SAR
483 	wsr	a2, SAR
489 	l32i	a2, a1, PT_WINDOWSTART
490 	addi	a3, a2, -1
491 	and	a2, a2, a3
492 	beqz	a2, 1f			# Skip if regs were spilled before exc.
494 	rsr	a2, WINDOWSTART
495 	addi	a3, a2, -1
496 	and	a2, a2, a3
497 	bnez	a2, 1f			# Skip if registers aren't spilled now
499 	addi	a2, a1, -16
500 	l32i	a4, a2, 0
501 	l32i	a5, a2, 4
504 	l32i	a4, a2, 8
505 	l32i	a5, a2, 12
525 	l32i	a2, a1, PT_AREG + 2 * 4
555 	s32e	a2, a5,  -8
567 	l32e	a2, a5,  -8
574  * a2:	available, saved in excsave1
582 /* 16*/	rsr	a2, PS
584 /* 22*/	extui	a2, a2, PS_OWB_SHIFT, PS_OWB_SHIFT
585 /* 25*/	xor	a2, a2, a3
587 /* 31*/	slli	a2, a2, PS_OWB_SHIFT
588 /* 34*/	xor	a2, a3, a2
589 /* 37*/	wsr	a2, PS
593 /* 46*/	rsr	a2, EXCSAVE1
609 	s32e	a2, a9,  -8
626 	l32e	a2, a9,  -8
642 	s32e	a2,  a13,  -8
664 	l32e	a2,  a13,  -8