xtensa/cpu/start.S

63 1:	l32r	a2, 2b
64 	jx	a2
134 	movi	a2, 1
136 	movi	a2, XCHAL_EXCM_LEVEL
138 	wsr	a2, PS
143 	___unlock_dcache_all a2, a3
144 	___invalidate_dcache_all a2, a3
145 	___unlock_icache_all a2, a3
146 	___invalidate_icache_all a2, a3
152 	movi	a2, __reloc_table_start
155 1:	beq	a2, a3, 3f	# no more entries?
156 	l32i	a4, a2, 0	# start destination (in RAM)
157 	l32i	a5, a2, 4	# end destination (in RAM)
158 	l32i	a6, a2, 8	# start source (in ROM)
159 	addi	a2, a2, 12	# next entry
202 	movi	a2, XCHAL_EXCM_LEVEL
204 	movi	a2, (1<<PS_WOE_BIT) | XCHAL_EXCM_LEVEL
206 	wsr	a2, PS
211 	___flush_dcache_all a2, a3
243 	mov	a2, sp
245 	mov	sp, a2
267 	movi	a2, 0
282  * a2 = addr_sp
293 	mov	a1, a2
294 	mov	a2, a3
313 	addi	sp, a2, -16
342 	wsr	a2, EXCSAVE1
343 	movi	a2, ExceptionHandler
344 	jx	a2
350 	wsr	a2, EXCSAVE1
351 	movi	a2, ExceptionHandler
352 	jx	a2
376 	rsr	a2, EXCCAUSE		# find handler
381 	bnei	a2, 5, 1f		# jump if not alloca exception
384 	s32i	a3, a1, 0		# and save a3 (a2 still in excsave1)
385 	movi	a2, fast_alloca_exception
386 	jx	a2			# jump to fast_alloca_exception
392 1:	addi	a2, a1, - PT_SIZE - 16
393 	s32i	a0, a2, PT_AREG + 0 * 4
394 	s32i	a1, a2, PT_AREG + 1 * 4
395 	s32i	a3, a2, PT_AREG + 3 * 4
397 	s32i	a3, a2, PT_AREG + 2 * 4
398 	mov	a1, a2
418 	rsr	a2, WINDOWSTART
419 	s32i	a2, a1, PT_WINDOWSTART
422 	rsr	a2, SAR
425 	s32i	a2, a1, PT_SAR
430 	movi	a2, 0
432 	xsr	a2, LCOUNT
435 	s32i	a2, a1, PT_LCOUNT
442 	rsr	a2, EXCCAUSE
452 	s32i	a2, a1, PT_EXCCAUSE
456 	addx4	a0, a2, a0
459 	mov	a2, a1			# Provide stack frame as only argument
474 	l32i	a2, a1, PT_LBEG
477 	wsr	a2, LBEG
482 	l32i	a2, a1, PT_SAR
484 	wsr	a2, SAR
490 	l32i	a2, a1, PT_WINDOWSTART
491 	addi	a3, a2, -1
492 	and	a2, a2, a3
493 	beqz	a2, 1f			# Skip if regs were spilled before exc.
495 	rsr	a2, WINDOWSTART
496 	addi	a3, a2, -1
497 	and	a2, a2, a3
498 	bnez	a2, 1f			# Skip if registers aren't spilled now
500 	addi	a2, a1, -16
501 	l32i	a4, a2, 0
502 	l32i	a5, a2, 4
505 	l32i	a4, a2, 8
506 	l32i	a5, a2, 12
526 	l32i	a2, a1, PT_AREG + 2 * 4
556 	s32e	a2, a5,  -8
568 	l32e	a2, a5,  -8
575  * a2:	available, saved in excsave1
583 /* 16*/	rsr	a2, PS
585 /* 22*/	extui	a2, a2, PS_OWB_SHIFT, PS_OWB_SHIFT
586 /* 25*/	xor	a2, a2, a3
588 /* 31*/	slli	a2, a2, PS_OWB_SHIFT
589 /* 34*/	xor	a2, a3, a2
590 /* 37*/	wsr	a2, PS
594 /* 46*/	rsr	a2, EXCSAVE1
610 	s32e	a2, a9,  -8
627 	l32e	a2, a9,  -8
643 	s32e	a2,  a13,  -8
665 	l32e	a2,  a13,  -8