summaryrefslogtreecommitdiffstats
path: root/arch/sparc/mm/ultra.S
blob: d245f89d139528f049f2c8d596729974fb7e2020 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * ultra.S: Don't expand these all over the place...
 *
 * Copyright (C) 1997, 2000, 2008 David S. Miller (davem@davemloft.net)
 */

#include <asm/asi.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/spitfire.h>
#include <asm/mmu_context.h>
#include <asm/mmu.h>
#include <asm/pil.h>
#include <asm/head.h>
#include <asm/thread_info.h>
#include <asm/cacheflush.h>
#include <asm/hypervisor.h>
#include <asm/cpudata.h>

	/* Basically, most of the Spitfire vs. Cheetah madness
	 * has to do with the fact that Cheetah does not support
	 * IMMU flushes out of the secondary context.  Someone needs
	 * to throw a south lake birthday party for the folks
	 * in Microelectronics who refused to fix this shit.
	 */

	/* This file is meant to be read efficiently by the CPU, not humans.
	 * Staraj sie tego nikomu nie pierdolnac...
	 */
	.text
	.align		32
	.globl		__flush_tlb_mm
__flush_tlb_mm:		/* 19 insns */
	/* %o0=(ctx & TAG_CONTEXT_BITS), %o1=SECONDARY_CONTEXT */
	ldxa		[%o1] ASI_DMMU, %g2
	cmp		%g2, %o0
	bne,pn		%icc, __spitfire_flush_tlb_mm_slow
	 mov		0x50, %g3
	stxa		%g0, [%g3] ASI_DMMU_DEMAP
	stxa		%g0, [%g3] ASI_IMMU_DEMAP
	sethi		%hi(KERNBASE), %g3
	flush		%g3
	retl
	 nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

	.align		32
	.globl		__flush_tlb_page
__flush_tlb_page:	/* 22 insns */
	/* %o0 = context, %o1 = vaddr */
	rdpr		%pstate, %g7
	andn		%g7, PSTATE_IE, %g2
	wrpr		%g2, %pstate
	mov		SECONDARY_CONTEXT, %o4
	ldxa		[%o4] ASI_DMMU, %g2
	stxa		%o0, [%o4] ASI_DMMU
	andcc		%o1, 1, %g0
	andn		%o1, 1, %o3
	be,pn		%icc, 1f
	 or		%o3, 0x10, %o3
	stxa		%g0, [%o3] ASI_IMMU_DEMAP
1:	stxa		%g0, [%o3] ASI_DMMU_DEMAP
	membar		#Sync
	stxa		%g2, [%o4] ASI_DMMU
	sethi		%hi(KERNBASE), %o4
	flush		%o4
	retl
	 wrpr		%g7, 0x0, %pstate
	nop
	nop
	nop
	nop

	.align		32
	.globl		__flush_tlb_pending
__flush_tlb_pending:	/* 27 insns */
	/* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
	rdpr		%pstate, %g7
	sllx		%o1, 3, %o1
	andn		%g7, PSTATE_IE, %g2
	wrpr		%g2, %pstate
	mov		SECONDARY_CONTEXT, %o4
	ldxa		[%o4] ASI_DMMU, %g2
	stxa		%o0, [%o4] ASI_DMMU
1:	sub		%o1, (1 << 3), %o1
	ldx		[%o2 + %o1], %o3
	andcc		%o3, 1, %g0
	andn		%o3, 1, %o3
	be,pn		%icc, 2f
	 or		%o3, 0x10, %o3
	stxa		%g0, [%o3] ASI_IMMU_DEMAP
2:	stxa		%g0, [%o3] ASI_DMMU_DEMAP
	membar		#Sync
	brnz,pt		%o1, 1b
	 nop
	stxa		%g2, [%o4] ASI_DMMU
	sethi		%hi(KERNBASE), %o4
	flush		%o4
	retl
	 wrpr		%g7, 0x0, %pstate
	nop
	nop
	nop
	nop

	.align		32
	.globl		__flush_tlb_kernel_range
__flush_tlb_kernel_range:	/* 31 insns */
	/* %o0=start, %o1=end */
	cmp		%o0, %o1
	be,pn		%xcc, 2f
	 sub		%o1, %o0, %o3
	srlx		%o3, 18, %o4
	brnz,pn		%o4, __spitfire_flush_tlb_kernel_range_slow
	 sethi		%hi(PAGE_SIZE), %o4
	sub		%o3, %o4, %o3
	or		%o0, 0x20, %o0		! Nucleus
1:	stxa		%g0, [%o0 + %o3] ASI_DMMU_DEMAP
	stxa		%g0, [%o0 + %o3] ASI_IMMU_DEMAP
	membar		#Sync
	brnz,pt		%o3, 1b
	 sub		%o3, %o4, %o3
2:	sethi		%hi(KERNBASE), %o3
	flush		%o3
	retl
	 nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

__spitfire_flush_tlb_kernel_range_slow:
	mov		63 * 8, %o4
1:	ldxa		[%o4] ASI_ITLB_DATA_ACCESS, %o3
	andcc		%o3, 0x40, %g0			/* _PAGE_L_4U */
	bne,pn		%xcc, 2f
	 mov		TLB_TAG_ACCESS, %o3
	stxa		%g0, [%o3] ASI_IMMU
	stxa		%g0, [%o4] ASI_ITLB_DATA_ACCESS
	membar		#Sync
2:	ldxa		[%o4] ASI_DTLB_DATA_ACCESS, %o3
	andcc		%o3, 0x40, %g0
	bne,pn		%xcc, 2f
	 mov		TLB_TAG_ACCESS, %o3
	stxa		%g0, [%o3] ASI_DMMU
	stxa		%g0, [%o4] ASI_DTLB_DATA_ACCESS
	membar		#Sync
2:	sub		%o4, 8, %o4
	brgez,pt	%o4, 1b
	 nop
	retl
	 nop

__spitfire_flush_tlb_mm_slow:
	rdpr		%pstate, %g1
	wrpr		%g1, PSTATE_IE, %pstate
	stxa		%o0, [%o1] ASI_DMMU
	stxa		%g0, [%g3] ASI_DMMU_DEMAP
	stxa		%g0, [%g3] ASI_IMMU_DEMAP
	flush		%g6
	stxa		%g2, [%o1] ASI_DMMU
	sethi		%hi(KERNBASE), %o1
	flush		%o1
	retl
	 wrpr		%g1, 0, %pstate

/*
 * The following code flushes one page_size worth.
 */
	.section .kprobes.text, "ax"
	.align		32
	.globl		__flush_icache_page
__flush_icache_page:	/* %o0 = phys_page */
	srlx		%o0, PAGE_SHIFT, %o0
	sethi		%hi(PAGE_OFFSET), %g1
	sllx		%o0, PAGE_SHIFT, %o0
	sethi		%hi(PAGE_SIZE), %g2
	ldx		[%g1 + %lo(PAGE_OFFSET)], %g1
	add		%o0, %g1, %o0
1:	subcc		%g2, 32, %g2
	bne,pt		%icc, 1b
	 flush		%o0 + %g2
	retl
	 nop

#ifdef DCACHE_ALIASING_POSSIBLE

#if (PAGE_SHIFT != 13)
#error only page shift of 13 is supported by dcache flush
#endif

#define DTAG_MASK 0x3

	/* This routine is Spitfire specific so the hardcoded
	 * D-cache size and line-size are OK.
	 */
	.align		64
	.globl		__flush_dcache_page
__flush_dcache_page:	/* %o0=kaddr, %o1=flush_icache */
	sethi		%hi(PAGE_OFFSET), %g1
	ldx		[%g1 + %lo(PAGE_OFFSET)], %g1
	sub		%o0, %g1, %o0			! physical address
	srlx		%o0, 11, %o0			! make D-cache TAG
	sethi		%hi(1 << 14), %o2		! D-cache size
	sub		%o2, (1 << 5), %o2		! D-cache line size
1:	ldxa		[%o2] ASI_DCACHE_TAG, %o3	! load D-cache TAG
	andcc		%o3, DTAG_MASK, %g0		! Valid?
	be,pn		%xcc, 2f			! Nope, branch
	 andn		%o3, DTAG_MASK, %o3		! Clear valid bits
	cmp		%o3, %o0			! TAG match?
	bne,pt		%xcc, 2f			! Nope, branch
	 nop
	stxa		%g0, [%o2] ASI_DCACHE_TAG	! Invalidate TAG
	membar		#Sync
2:	brnz,pt		%o2, 1b
	 sub		%o2, (1 << 5), %o2		! D-cache line size

	/* The I-cache does not snoop local stores so we
	 * better flush that too when necessary.
	 */
	brnz,pt		%o1, __flush_icache_page
	 sllx		%o0, 11, %o0
	retl
	 nop

#endif /* DCACHE_ALIASING_POSSIBLE */

	.previous

	/* Cheetah specific versions, patched at boot time. */
__cheetah_flush_tlb_mm: /* 19 insns */
	rdpr		%pstate, %g7
	andn		%g7, PSTATE_IE, %g2
	wrpr		%g2, 0x0, %pstate
	wrpr		%g0, 1, %tl
	mov		PRIMARY_CONTEXT, %o2
	mov		0x40, %g3
	ldxa		[%o2] ASI_DMMU, %g2
	srlx		%g2, CTX_PGSZ1_NUC_SHIFT, %o1
	sllx		%o1, CTX_PGSZ1_NUC_SHIFT, %o1
	or		%o0, %o1, %o0	/* Preserve nucleus page size fields */
	stxa		%o0, [%o2] ASI_DMMU
	stxa		%g0, [%g3] ASI_DMMU_DEMAP
	stxa		%g0, [%g3] ASI_IMMU_DEMAP
	stxa		%g2, [%o2] ASI_DMMU
	sethi		%hi(KERNBASE), %o2
	flush		%o2
	wrpr		%g0, 0, %tl
	retl
	 wrpr		%g7, 0x0, %pstate

__cheetah_flush_tlb_page:	/* 22 insns */
	/* %o0 = context, %o1 = vaddr */
	rdpr		%pstate, %g7
	andn		%g7, PSTATE_IE, %g2
	wrpr		%g2, 0x0, %pstate
	wrpr		%g0, 1, %tl
	mov		PRIMARY_CONTEXT, %o4
	ldxa		[%o4] ASI_DMMU, %g2
	srlx		%g2, CTX_PGSZ1_NUC_SHIFT, %o3
	sllx		%o3, CTX_PGSZ1_NUC_SHIFT, %o3
	or		%o0, %o3, %o0	/* Preserve nucleus page size fields */
	stxa		%o0, [%o4] ASI_DMMU
	andcc		%o1, 1, %g0
	be,pn		%icc, 1f
	 andn		%o1, 1, %o3
	stxa		%g0, [%o3] ASI_IMMU_DEMAP
1:	stxa		%g0, [%o3] ASI_DMMU_DEMAP	
	membar		#Sync
	stxa		%g2, [%o4] ASI_DMMU
	sethi		%hi(KERNBASE), %o4
	flush		%o4
	wrpr		%g0, 0, %tl
	retl
	 wrpr		%g7, 0x0, %pstate

__cheetah_flush_tlb_pending:	/* 27 insns */
	/* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
	rdpr		%pstate, %g7
	sllx		%o1, 3, %o1
	andn		%g7, PSTATE_IE, %g2
	wrpr		%g2, 0x0, %pstate
	wrpr		%g0, 1, %tl
	mov		PRIMARY_CONTEXT, %o4
	ldxa		[%o4] ASI_DMMU, %g2
	srlx		%g2, CTX_PGSZ1_NUC_SHIFT, %o3
	sllx		%o3, CTX_PGSZ1_NUC_SHIFT, %o3
	or		%o0, %o3, %o0	/* Preserve nucleus page size fields */
	stxa		%o0, [%o4] ASI_DMMU
1:	sub		%o1, (1 << 3), %o1
	ldx		[%o2 + %o1], %o3
	andcc		%o3, 1, %g0
	be,pn		%icc, 2f
	 andn		%o3, 1, %o3
	stxa		%g0, [%o3] ASI_IMMU_DEMAP
2:	stxa		%g0, [%o3] ASI_DMMU_DEMAP	
	membar		#Sync
	brnz,pt		%o1, 1b
	 nop
	stxa		%g2, [%o4] ASI_DMMU
	sethi		%hi(KERNBASE), %o4
	flush		%o4
	wrpr		%g0, 0, %tl
	retl
	 wrpr		%g7, 0x0, %pstate

__cheetah_flush_tlb_kernel_range:	/* 31 insns */
	/* %o0=start, %o1=end */
	cmp		%o0, %o1
	be,pn		%xcc, 2f
	 sub		%o1, %o0, %o3
	srlx		%o3, 18, %o4
	brnz,pn		%o4, 3f
	 sethi		%hi(PAGE_SIZE), %o4
	sub		%o3, %o4, %o3
	or		%o0, 0x20, %o0		! Nucleus
1:	stxa		%g0, [%o0 + %o3] ASI_DMMU_DEMAP
	stxa		%g0, [%o0 + %o3] ASI_IMMU_DEMAP
	membar		#Sync
	brnz,pt		%o3, 1b
	 sub		%o3, %o4, %o3
2:	sethi		%hi(KERNBASE), %o3
	flush		%o3
	retl
	 nop
3:	mov		0x80, %o4
	stxa		%g0, [%o4] ASI_DMMU_DEMAP
	membar		#Sync
	stxa		%g0, [%o4] ASI_IMMU_DEMAP
	membar		#Sync
	retl
	 nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

#ifdef DCACHE_ALIASING_POSSIBLE
__cheetah_flush_dcache_page: /* 11 insns */
	sethi		%hi(PAGE_OFFSET), %g1
	ldx		[%g1 + %lo(PAGE_OFFSET)], %g1
	sub		%o0, %g1, %o0
	sethi		%hi(PAGE_SIZE), %o4
1:	subcc		%o4, (1 << 5), %o4
	stxa		%g0, [%o0 + %o4] ASI_DCACHE_INVALIDATE
	membar		#Sync
	bne,pt		%icc, 1b
	 nop
	retl		/* I-cache flush never needed on Cheetah, see callers. */
	 nop
#endif /* DCACHE_ALIASING_POSSIBLE */

	/* Hypervisor specific versions, patched at boot time.  */
__hypervisor_tlb_tl0_error:
	save		%sp, -192, %sp
	mov		%i0, %o0
	call		hypervisor_tlbop_error
	 mov		%i1, %o1
	ret
	 restore

__hypervisor_flush_tlb_mm: /* 19 insns */
	mov		%o0, %o2	/* ARG2: mmu context */
	mov		0, %o0		/* ARG0: CPU lists unimplemented */
	mov		0, %o1		/* ARG1: CPU lists unimplemented */
	mov		HV_MMU_ALL, %o3	/* ARG3: flags */
	mov		HV_FAST_MMU_DEMAP_CTX, %o5
	ta		HV_FAST_TRAP
	brnz,pn		%o0, 1f
	 mov		HV_FAST_MMU_DEMAP_CTX, %o1
	retl
	 nop
1:	sethi		%hi(__hypervisor_tlb_tl0_error), %o5
	jmpl		%o5 + %lo(__hypervisor_tlb_tl0_error), %g0
	 nop
	nop
	nop
	nop
	nop
	nop
	nop

__hypervisor_flush_tlb_page: /* 22 insns */
	/* %o0 = context, %o1 = vaddr */
	mov		%o0, %g2
	mov		%o1, %o0              /* ARG0: vaddr + IMMU-bit */
	mov		%g2, %o1	      /* ARG1: mmu context */
	mov		HV_MMU_ALL, %o2	      /* ARG2: flags */
	srlx		%o0, PAGE_SHIFT, %o0
	sllx		%o0, PAGE_SHIFT, %o0
	ta		HV_MMU_UNMAP_ADDR_TRAP
	brnz,pn		%o0, 1f
	 mov		HV_MMU_UNMAP_ADDR_TRAP, %o1
	retl
	 nop
1:	sethi		%hi(__hypervisor_tlb_tl0_error), %o2
	jmpl		%o2 + %lo(__hypervisor_tlb_tl0_error), %g0
	 nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

__hypervisor_flush_tlb_pending: /* 27 insns */
	/* %o0 = context, %o1 = nr, %o2 = vaddrs[] */
	sllx		%o1, 3, %g1
	mov		%o2, %g2
	mov		%o0, %g3
1:	sub		%g1, (1 << 3), %g1
	ldx		[%g2 + %g1], %o0      /* ARG0: vaddr + IMMU-bit */
	mov		%g3, %o1	      /* ARG1: mmu context */
	mov		HV_MMU_ALL, %o2	      /* ARG2: flags */
	srlx		%o0, PAGE_SHIFT, %o0
	sllx		%o0, PAGE_SHIFT, %o0
	ta		HV_MMU_UNMAP_ADDR_TRAP
	brnz,pn		%o0, 1f
	 mov		HV_MMU_UNMAP_ADDR_TRAP, %o1
	brnz,pt		%g1, 1b
	 nop
	retl
	 nop
1:	sethi		%hi(__hypervisor_tlb_tl0_error), %o2
	jmpl		%o2 + %lo(__hypervisor_tlb_tl0_error), %g0
	 nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

__hypervisor_flush_tlb_kernel_range: /* 31 insns */
	/* %o0=start, %o1=end */
	cmp		%o0, %o1
	be,pn		%xcc, 2f
	 sub		%o1, %o0, %g2
	srlx		%g2, 18, %g3
	brnz,pn		%g3, 4f
	 mov		%o0, %g1
	sethi		%hi(PAGE_SIZE), %g3
	sub		%g2, %g3, %g2
1:	add		%g1, %g2, %o0	/* ARG0: virtual address */
	mov		0, %o1		/* ARG1: mmu context */
	mov		HV_MMU_ALL, %o2	/* ARG2: flags */
	ta		HV_MMU_UNMAP_ADDR_TRAP
	brnz,pn		%o0, 3f
	 mov		HV_MMU_UNMAP_ADDR_TRAP, %o1
	brnz,pt		%g2, 1b
	 sub		%g2, %g3, %g2
2:	retl
	 nop
3:	sethi		%hi(__hypervisor_tlb_tl0_error), %o2
	jmpl		%o2 + %lo(__hypervisor_tlb_tl0_error), %g0
	 nop
4:	mov		0, %o0		/* ARG0: CPU lists unimplemented */
	mov		0, %o1		/* ARG1: CPU lists unimplemented */
	mov		0, %o2		/* ARG2: mmu context == nucleus */
	mov		HV_MMU_ALL, %o3	/* ARG3: flags */
	mov		HV_FAST_MMU_DEMAP_CTX, %o5
	ta		HV_FAST_TRAP
	brnz,pn		%o0, 3b
	 mov		HV_FAST_MMU_DEMAP_CTX, %o1
	retl
	 nop

#ifdef DCACHE_ALIASING_POSSIBLE
	/* XXX Niagara and friends have an 8K cache, so no aliasing is
	 * XXX possible, but nothing explicit in the Hypervisor API
	 * XXX guarantees this.
	 */
__hypervisor_flush_dcache_page:	/* 2 insns */
	retl
	 nop
#endif

tlb_patch_one:
1:	lduw		[%o1], %g1
	stw		%g1, [%o0]
	flush		%o0
	subcc		%o2, 1, %o2
	add		%o1, 4, %o1
	bne,pt		%icc, 1b
	 add		%o0, 4, %o0
	retl
	 nop

#ifdef CONFIG_SMP
	/* These are all called by the slaves of a cross call, at
	 * trap level 1, with interrupts fully disabled.
	 *
	 * Register usage:
	 *   %g5	mm->context	(all tlb flushes)
	 *   %g1	address arg 1	(tlb page and range flushes)
	 *   %g7	address arg 2	(tlb range flush only)
	 *
	 *   %g6	scratch 1
	 *   %g2	scratch 2
	 *   %g3	scratch 3
	 *   %g4	scratch 4
	 */
	.align		32
	.globl		xcall_flush_tlb_mm
xcall_flush_tlb_mm:	/* 24 insns */
	mov		PRIMARY_CONTEXT, %g2
	ldxa		[%g2] ASI_DMMU, %g3
	srlx		%g3, CTX_PGSZ1_NUC_SHIFT, %g4
	sllx		%g4, CTX_PGSZ1_NUC_SHIFT, %g4
	or		%g5, %g4, %g5	/* Preserve nucleus page size fields */
	stxa		%g5, [%g2] ASI_DMMU
	mov		0x40, %g4
	stxa		%g0, [%g4] ASI_DMMU_DEMAP
	stxa		%g0, [%g4] ASI_IMMU_DEMAP
	stxa		%g3, [%g2] ASI_DMMU
	retry
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

	.globl		xcall_flush_tlb_page
xcall_flush_tlb_page:	/* 20 insns */
	/* %g5=context, %g1=vaddr */
	mov		PRIMARY_CONTEXT, %g4
	ldxa		[%g4] ASI_DMMU, %g2
	srlx		%g2, CTX_PGSZ1_NUC_SHIFT, %g4
	sllx		%g4, CTX_PGSZ1_NUC_SHIFT, %g4
	or		%g5, %g4, %g5
	mov		PRIMARY_CONTEXT, %g4
	stxa		%g5, [%g4] ASI_DMMU
	andcc		%g1, 0x1, %g0
	be,pn		%icc, 2f
	 andn		%g1, 0x1, %g5
	stxa		%g0, [%g5] ASI_IMMU_DEMAP
2:	stxa		%g0, [%g5] ASI_DMMU_DEMAP
	membar		#Sync
	stxa		%g2, [%g4] ASI_DMMU
	retry
	nop
	nop
	nop
	nop
	nop

	.globl		xcall_flush_tlb_kernel_range
xcall_flush_tlb_kernel_range:	/* 44 insns */
	sethi		%hi(PAGE_SIZE - 1), %g2
	or		%g2, %lo(PAGE_SIZE - 1), %g2
	andn		%g1, %g2, %g1
	andn		%g7, %g2, %g7
	sub		%g7, %g1, %g3
	srlx		%g3, 18, %g2
	brnz,pn		%g2, 2f
	 add		%g2, 1, %g2
	sub		%g3, %g2, %g3
	or		%g1, 0x20, %g1		! Nucleus
1:	stxa		%g0, [%g1 + %g3] ASI_DMMU_DEMAP
	stxa		%g0, [%g1 + %g3] ASI_IMMU_DEMAP
	membar		#Sync
	brnz,pt		%g3, 1b
	 sub		%g3, %g2, %g3
	retry
2:	mov		63 * 8, %g1
1:	ldxa		[%g1] ASI_ITLB_DATA_ACCESS, %g2
	andcc		%g2, 0x40, %g0			/* _PAGE_L_4U */
	bne,pn		%xcc, 2f
	 mov		TLB_TAG_ACCESS, %g2
	stxa		%g0, [%g2] ASI_IMMU
	stxa		%g0, [%g1] ASI_ITLB_DATA_ACCESS
	membar		#Sync
2:	ldxa		[%g1] ASI_DTLB_DATA_ACCESS, %g2
	andcc		%g2, 0x40, %g0
	bne,pn		%xcc, 2f
	 mov		TLB_TAG_ACCESS, %g2
	stxa		%g0, [%g2] ASI_DMMU
	stxa		%g0, [%g1] ASI_DTLB_DATA_ACCESS
	membar		#Sync
2:	sub		%g1, 8, %g1
	brgez,pt	%g1, 1b
	 nop
	retry
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

	/* This runs in a very controlled environment, so we do
	 * not need to worry about BH races etc.
	 */
	.globl		xcall_sync_tick
xcall_sync_tick:

661:	rdpr		%pstate, %g2
	wrpr		%g2, PSTATE_IG | PSTATE_AG, %pstate
	.section	.sun4v_2insn_patch, "ax"
	.word		661b
	nop
	nop
	.previous

	rdpr		%pil, %g2
	wrpr		%g0, PIL_NORMAL_MAX, %pil
	sethi		%hi(109f), %g7
	b,pt		%xcc, etrap_irq
109:	 or		%g7, %lo(109b), %g7
#ifdef CONFIG_TRACE_IRQFLAGS
	call		trace_hardirqs_off
	 nop
#endif
	call		smp_synchronize_tick_client
	 nop
	b		rtrap_xcall
	 ldx		[%sp + PTREGS_OFF + PT_V9_TSTATE], %l1

	.globl		xcall_fetch_glob_regs
xcall_fetch_glob_regs:
	sethi		%hi(global_cpu_snapshot), %g1
	or		%g1, %lo(global_cpu_snapshot), %g1
	__GET_CPUID(%g2)
	sllx		%g2, 6, %g3
	add		%g1, %g3, %g1
	rdpr		%tstate, %g7
	stx		%g7, [%g1 + GR_SNAP_TSTATE]
	rdpr		%tpc, %g7
	stx		%g7, [%g1 + GR_SNAP_TPC]
	rdpr		%tnpc, %g7
	stx		%g7, [%g1 + GR_SNAP_TNPC]
	stx		%o7, [%g1 + GR_SNAP_O7]
	stx		%i7, [%g1 + GR_SNAP_I7]
	/* Don't try this at home kids... */
	rdpr		%cwp, %g3
	sub		%g3, 1, %g7
	wrpr		%g7, %cwp
	mov		%i7, %g7
	wrpr		%g3, %cwp
	stx		%g7, [%g1 + GR_SNAP_RPC]
	sethi		%hi(trap_block), %g7
	or		%g7, %lo(trap_block), %g7
	sllx		%g2, TRAP_BLOCK_SZ_SHIFT, %g2
	add		%g7, %g2, %g7
	ldx		[%g7 + TRAP_PER_CPU_THREAD], %g3
	stx		%g3, [%g1 + GR_SNAP_THREAD]
	retry

	.globl		xcall_fetch_glob_pmu
xcall_fetch_glob_pmu:
	sethi		%hi(global_cpu_snapshot), %g1
	or		%g1, %lo(global_cpu_snapshot), %g1
	__GET_CPUID(%g2)
	sllx		%g2, 6, %g3
	add		%g1, %g3, %g1
	rd		%pic, %g7
	stx		%g7, [%g1 + (4 * 8)]
	rd		%pcr, %g7
	stx		%g7, [%g1 + (0 * 8)]
	retry

	.globl		xcall_fetch_glob_pmu_n4
xcall_fetch_glob_pmu_n4:
	sethi		%hi(global_cpu_snapshot), %g1
	or		%g1, %lo(global_cpu_snapshot), %g1
	__GET_CPUID(%g2)
	sllx		%g2, 6, %g3
	add		%g1, %g3, %g1

	ldxa		[%g0] ASI_PIC, %g7
	stx		%g7, [%g1 + (4 * 8)]
	mov		0x08, %g3
	ldxa		[%g3] ASI_PIC, %g7
	stx		%g7, [%g1 + (5 * 8)]
	mov		0x10, %g3
	ldxa		[%g3] ASI_PIC, %g7
	stx		%g7, [%g1 + (6 * 8)]
	mov		0x18, %g3
	ldxa		[%g3] ASI_PIC, %g7
	stx		%g7, [%g1 + (7 * 8)]

	mov		%o0, %g2
	mov		%o1, %g3
	mov		%o5, %g7

	mov		HV_FAST_VT_GET_PERFREG, %o5
	mov		3, %o0
	ta		HV_FAST_TRAP
	stx		%o1, [%g1 + (3 * 8)]
	mov		HV_FAST_VT_GET_PERFREG, %o5
	mov		2, %o0
	ta		HV_FAST_TRAP
	stx		%o1, [%g1 + (2 * 8)]
	mov		HV_FAST_VT_GET_PERFREG, %o5
	mov		1, %o0
	ta		HV_FAST_TRAP
	stx		%o1, [%g1 + (1 * 8)]
	mov		HV_FAST_VT_GET_PERFREG, %o5
	mov		0, %o0
	ta		HV_FAST_TRAP
	stx		%o1, [%g1 + (0 * 8)]

	mov		%g2, %o0
	mov		%g3, %o1
	mov		%g7, %o5

	retry

__cheetah_xcall_flush_tlb_kernel_range:	/* 44 insns */
	sethi		%hi(PAGE_SIZE - 1), %g2
	or		%g2, %lo(PAGE_SIZE - 1), %g2
	andn		%g1, %g2, %g1
	andn		%g7, %g2, %g7
	sub		%g7, %g1, %g3
	srlx		%g3, 18, %g2
	brnz,pn		%g2, 2f
	 add		%g2, 1, %g2
	sub		%g3, %g2, %g3
	or		%g1, 0x20, %g1		! Nucleus
1:	stxa		%g0, [%g1 + %g3] ASI_DMMU_DEMAP
	stxa		%g0, [%g1 + %g3] ASI_IMMU_DEMAP
	membar		#Sync
	brnz,pt		%g3, 1b
	 sub		%g3, %g2, %g3
	retry
2:	mov		0x80, %g2
	stxa		%g0, [%g2] ASI_DMMU_DEMAP
	membar		#Sync
	stxa		%g0, [%g2] ASI_IMMU_DEMAP
	membar		#Sync
	retry
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop
	nop

#ifdef DCACHE_ALIASING_POSSIBLE
	.align		32
	.globl		xcall_flush_dcache_page_cheetah
xcall_flush_dcache_page_cheetah: /* %g1 == physical page address */
	sethi		%hi(PAGE_SIZE), %g3
1:	subcc		%g3, (1 << 5), %g3
	stxa		%g0, [%g1 + %g3] ASI_DCACHE_INVALIDATE
	membar		#Sync
	bne,pt		%icc, 1b
	 nop
	retry
	nop
#endif /* DCACHE_ALIASING_POSSIBLE */

	.globl		xcall_flush_dcache_page_spitfire
xcall_flush_dcache_page_spitfire: /* %g1 == physical page address
				     %g7 == kernel page virtual address
				     %g5 == (page->mapping != NULL)  */
#ifdef DCACHE_ALIASING_POSSIBLE
	srlx		%g1, (13 - 2), %g1	! Form tag comparitor
	sethi		%hi(L1DCACHE_SIZE), %g3	! D$ size == 16K
	sub		%g3, (1 << 5), %g3	! D$ linesize == 32
1:	ldxa		[%g3] ASI_DCACHE_TAG, %g2
	andcc		%g2, 0x3, %g0
	be,pn		%xcc, 2f
	 andn		%g2, 0x3, %g2
	cmp		%g2, %g1

	bne,pt		%xcc, 2f
	 nop
	stxa		%g0, [%g3] ASI_DCACHE_TAG
	membar		#Sync
2:	cmp		%g3, 0
	bne,pt		%xcc, 1b
	 sub		%g3, (1 << 5), %g3

	brz,pn		%g5, 2f
#endif /* DCACHE_ALIASING_POSSIBLE */
	 sethi		%hi(PAGE_SIZE), %g3

1:	flush		%g7
	subcc		%g3, (1 << 5), %g3
	bne,pt		%icc, 1b
	 add		%g7, (1 << 5), %g7

2:	retry
	nop
	nop

	/* %g5:	error
	 * %g6:	tlb op
	 */
__hypervisor_tlb_xcall_error:
	mov	%g5, %g4
	mov	%g6, %g5
	ba,pt	%xcc, etrap
	 rd	%pc, %g7
	mov	%l4, %o0
	call	hypervisor_tlbop_error_xcall
	 mov	%l5, %o1
	ba,a,pt	%xcc, rtrap

	.globl		__hypervisor_xcall_flush_tlb_mm
__hypervisor_xcall_flush_tlb_mm: /* 24 insns */
	/* %g5=ctx, g1,g2,g3,g4,g7=scratch, %g6=unusable */
	mov		%o0, %g2
	mov		%o1, %g3
	mov		%o2, %g4
	mov		%o3, %g1
	mov		%o5, %g7
	clr		%o0		/* ARG0: CPU lists unimplemented */
	clr		%o1		/* ARG1: CPU lists unimplemented */
	mov		%g5, %o2	/* ARG2: mmu context */
	mov		HV_MMU_ALL, %o3	/* ARG3: flags */
	mov		HV_FAST_MMU_DEMAP_CTX, %o5
	ta		HV_FAST_TRAP
	mov		HV_FAST_MMU_DEMAP_CTX, %g6
	brnz,pn		%o0, 1f
	 mov		%o0, %g5
	mov		%g2, %o0
	mov		%g3, %o1
	mov		%g4, %o2
	mov		%g1, %o3
	mov		%g7, %o5
	membar		#Sync
	retry
1:	sethi		%hi(__hypervisor_tlb_xcall_error), %g4
	jmpl		%g4 + %lo(__hypervisor_tlb_xcall_error), %g0
	 nop

	.globl		__hypervisor_xcall_flush_tlb_page
__hypervisor_xcall_flush_tlb_page: /* 20 insns */
	/* %g5=ctx, %g1=vaddr */
	mov		%o0, %g2
	mov		%o1, %g3
	mov		%o2, %g4
	mov		%g1, %o0	        /* ARG0: virtual address */
	mov		%g5, %o1		/* ARG1: mmu context */
	mov		HV_MMU_ALL, %o2		/* ARG2: flags */
	srlx		%o0, PAGE_SHIFT, %o0
	sllx		%o0, PAGE_SHIFT, %o0
	ta		HV_MMU_UNMAP_ADDR_TRAP
	mov		HV_MMU_UNMAP_ADDR_TRAP, %g6
	brnz,a,pn	%o0, 1f
	 mov		%o0, %g5
	mov		%g2, %o0
	mov		%g3, %o1
	mov		%g4, %o2
	membar		#Sync
	retry
1:	sethi		%hi(__hypervisor_tlb_xcall_error), %g4
	jmpl		%g4 + %lo(__hypervisor_tlb_xcall_error), %g0
	 nop

	.globl		__hypervisor_xcall_flush_tlb_kernel_range
__hypervisor_xcall_flush_tlb_kernel_range: /* 44 insns */
	/* %g1=start, %g7=end, g2,g3,g4,g5,g6=scratch */
	sethi		%hi(PAGE_SIZE - 1), %g2
	or		%g2, %lo(PAGE_SIZE - 1), %g2
	andn		%g1, %g2, %g1
	andn		%g7, %g2, %g7
	sub		%g7, %g1, %g3
	srlx		%g3, 18, %g7
	add		%g2, 1, %g2
	sub		%g3, %g2, %g3
	mov		%o0, %g2
	mov		%o1, %g4
	brnz,pn		%g7, 2f
	 mov		%o2, %g7
1:	add		%g1, %g3, %o0	/* ARG0: virtual address */
	mov		0, %o1		/* ARG1: mmu context */
	mov		HV_MMU_ALL, %o2	/* ARG2: flags */
	ta		HV_MMU_UNMAP_ADDR_TRAP
	mov		HV_MMU_UNMAP_ADDR_TRAP, %g6
	brnz,pn		%o0, 1f
	 mov		%o0, %g5
	sethi		%hi(PAGE_SIZE), %o2
	brnz,pt		%g3, 1b
	 sub		%g3, %o2, %g3
5:	mov		%g2, %o0
	mov		%g4, %o1
	mov		%g7, %o2
	membar		#Sync
	retry
1:	sethi		%hi(__hypervisor_tlb_xcall_error), %g4
	jmpl		%g4 + %lo(__hypervisor_tlb_xcall_error), %g0
	 nop
2:	mov		%o3, %g1
	mov		%o5, %g3
	mov		0, %o0		/* ARG0: CPU lists unimplemented */
	mov		0, %o1		/* ARG1: CPU lists unimplemented */
	mov		0, %o2		/* ARG2: mmu context == nucleus */
	mov		HV_MMU_ALL, %o3	/* ARG3: flags */
	mov		HV_FAST_MMU_DEMAP_CTX, %o5
	ta		HV_FAST_TRAP
	mov		%g1, %o3
	brz,pt		%o0, 5b
	 mov		%g3, %o5
	mov		HV_FAST_MMU_DEMAP_CTX, %g6
	ba,pt		%xcc, 1b
	 clr		%g5

	/* These just get rescheduled to PIL vectors. */
	.globl		xcall_call_function
xcall_call_function:
	wr		%g0, (1 << PIL_SMP_CALL_FUNC), %set_softint
	retry

	.globl		xcall_call_function_single
xcall_call_function_single:
	wr		%g0, (1 << PIL_SMP_CALL_FUNC_SNGL), %set_softint
	retry

	.globl		xcall_receive_signal
xcall_receive_signal:
	wr		%g0, (1 << PIL_SMP_RECEIVE_SIGNAL), %set_softint
	retry

	.globl		xcall_capture
xcall_capture:
	wr		%g0, (1 << PIL_SMP_CAPTURE), %set_softint
	retry

#ifdef CONFIG_KGDB
	.globl		xcall_kgdb_capture
xcall_kgdb_capture:
	wr		%g0, (1 << PIL_KGDB_CAPTURE), %set_softint
	retry
#endif

#endif /* CONFIG_SMP */

	.globl		cheetah_patch_cachetlbops
cheetah_patch_cachetlbops:
	save		%sp, -128, %sp

	sethi		%hi(__flush_tlb_mm), %o0
	or		%o0, %lo(__flush_tlb_mm), %o0
	sethi		%hi(__cheetah_flush_tlb_mm), %o1
	or		%o1, %lo(__cheetah_flush_tlb_mm), %o1
	call		tlb_patch_one
	 mov		19, %o2

	sethi		%hi(__flush_tlb_page), %o0
	or		%o0, %lo(__flush_tlb_page), %o0
	sethi		%hi(__cheetah_flush_tlb_page), %o1
	or		%o1, %lo(__cheetah_flush_tlb_page), %o1
	call		tlb_patch_one
	 mov		22, %o2

	sethi		%hi(__flush_tlb_pending), %o0
	or		%o0, %lo(__flush_tlb_pending), %o0
	sethi		%hi(__cheetah_flush_tlb_pending), %o1
	or		%o1, %lo(__cheetah_flush_tlb_pending), %o1
	call		tlb_patch_one
	 mov		27, %o2

	sethi		%hi(__flush_tlb_kernel_range), %o0
	or		%o0, %lo(__flush_tlb_kernel_range), %o0
	sethi		%hi(__cheetah_flush_tlb_kernel_range), %o1
	or		%o1, %lo(__cheetah_flush_tlb_kernel_range), %o1
	call		tlb_patch_one
	 mov		31, %o2

#ifdef DCACHE_ALIASING_POSSIBLE
	sethi		%hi(__flush_dcache_page), %o0
	or		%o0, %lo(__flush_dcache_page), %o0
	sethi		%hi(__cheetah_flush_dcache_page), %o1
	or		%o1, %lo(__cheetah_flush_dcache_page), %o1
	call		tlb_patch_one
	 mov		11, %o2
#endif /* DCACHE_ALIASING_POSSIBLE */

#ifdef CONFIG_SMP
	sethi		%hi(xcall_flush_tlb_kernel_range), %o0
	or		%o0, %lo(xcall_flush_tlb_kernel_range), %o0
	sethi		%hi(__cheetah_xcall_flush_tlb_kernel_range), %o1
	or		%o1, %lo(__cheetah_xcall_flush_tlb_kernel_range), %o1
	call		tlb_patch_one
	 mov		44, %o2
#endif /* CONFIG_SMP */

	ret
	 restore

	.globl		hypervisor_patch_cachetlbops
hypervisor_patch_cachetlbops:
	save		%sp, -128, %sp

	sethi		%hi(__flush_tlb_mm), %o0
	or		%o0, %lo(__flush_tlb_mm), %o0
	sethi		%hi(__hypervisor_flush_tlb_mm), %o1
	or		%o1, %lo(__hypervisor_flush_tlb_mm), %o1
	call		tlb_patch_one
	 mov		19, %o2

	sethi		%hi(__flush_tlb_page), %o0
	or		%o0, %lo(__flush_tlb_page), %o0
	sethi		%hi(__hypervisor_flush_tlb_page), %o1
	or		%o1, %lo(__hypervisor_flush_tlb_page), %o1
	call		tlb_patch_one
	 mov		22, %o2

	sethi		%hi(__flush_tlb_pending), %o0
	or		%o0, %lo(__flush_tlb_pending), %o0
	sethi		%hi(__hypervisor_flush_tlb_pending), %o1
	or		%o1, %lo(__hypervisor_flush_tlb_pending), %o1
	call		tlb_patch_one
	 mov		27, %o2

	sethi		%hi(__flush_tlb_kernel_range), %o0
	or		%o0, %lo(__flush_tlb_kernel_range), %o0
	sethi		%hi(__hypervisor_flush_tlb_kernel_range), %o1
	or		%o1, %lo(__hypervisor_flush_tlb_kernel_range), %o1
	call		tlb_patch_one
	 mov		31, %o2

#ifdef DCACHE_ALIASING_POSSIBLE
	sethi		%hi(__flush_dcache_page), %o0
	or		%o0, %lo(__flush_dcache_page), %o0
	sethi		%hi(__hypervisor_flush_dcache_page), %o1
	or		%o1, %lo(__hypervisor_flush_dcache_page), %o1
	call		tlb_patch_one
	 mov		2, %o2
#endif /* DCACHE_ALIASING_POSSIBLE */

#ifdef CONFIG_SMP
	sethi		%hi(xcall_flush_tlb_mm), %o0
	or		%o0, %lo(xcall_flush_tlb_mm), %o0
	sethi		%hi(__hypervisor_xcall_flush_tlb_mm), %o1
	or		%o1, %lo(__hypervisor_xcall_flush_tlb_mm), %o1
	call		tlb_patch_one
	 mov		24, %o2

	sethi		%hi(xcall_flush_tlb_page), %o0
	or		%o0, %lo(xcall_flush_tlb_page), %o0
	sethi		%hi(__hypervisor_xcall_flush_tlb_page), %o1
	or		%o1, %lo(__hypervisor_xcall_flush_tlb_page), %o1
	call		tlb_patch_one
	 mov		20, %o2

	sethi		%hi(xcall_flush_tlb_kernel_range), %o0
	or		%o0, %lo(xcall_flush_tlb_kernel_range), %o0
	sethi		%hi(__hypervisor_xcall_flush_tlb_kernel_range), %o1
	or		%o1, %lo(__hypervisor_xcall_flush_tlb_kernel_range), %o1
	call		tlb_patch_one
	 mov		44, %o2
#endif /* CONFIG_SMP */

	ret
	 restore
OpenPOWER on IntegriCloud