aboutsummaryrefslogtreecommitdiff
path: root/arch/parisc/kernel/pacache.S
blob: 5901092e0196b855e64845f0c483fedb774a62d4 (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
/*
 *  PARISC TLB and cache flushing support
 *  Copyright (C) 2000-2001 Hewlett-Packard (John Marvin)
 *  Copyright (C) 2001 Matthew Wilcox (willy at parisc-linux.org)
 *  Copyright (C) 2002 Richard Hirst (rhirst with parisc-linux.org)
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2, or (at your option)
 *    any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 * NOTE: fdc,fic, and pdc instructions that use base register modification
 *       should only use index and base registers that are not shadowed,
 *       so that the fast path emulation in the non access miss handler
 *       can be used.
 */

#ifdef CONFIG_64BIT
	.level	2.0w
#else
	.level	2.0
#endif

#include <asm/psw.h>
#include <asm/assembly.h>
#include <asm/pgtable.h>
#include <asm/cache.h>
#include <linux/linkage.h>

	.text
	.align	128

ENTRY(flush_tlb_all_local)
	.proc
	.callinfo NO_CALLS
	.entry

	/*
	 * The pitlbe and pdtlbe instructions should only be used to
	 * flush the entire tlb. Also, there needs to be no intervening
	 * tlb operations, e.g. tlb misses, so the operation needs
	 * to happen in real mode with all interruptions disabled.
	 */

	/* pcxt_ssm_bug	- relied upon translation! PA 2.0 Arch. F-4 and F-5 */
	rsm		PSW_SM_I, %r19		/* save I-bit state */
	load32		PA(1f), %r1
	nop
	nop
	nop
	nop
	nop

	rsm		PSW_SM_Q, %r0		/* prep to load iia queue */
	mtctl		%r0, %cr17		/* Clear IIASQ tail */
	mtctl		%r0, %cr17		/* Clear IIASQ head */
	mtctl		%r1, %cr18		/* IIAOQ head */
	ldo		4(%r1), %r1
	mtctl		%r1, %cr18		/* IIAOQ tail */
	load32		REAL_MODE_PSW, %r1
	mtctl           %r1, %ipsw
	rfi
	nop

1:      load32		PA(cache_info), %r1

	/* Flush Instruction Tlb */

	LDREG		ITLB_SID_BASE(%r1), %r20
	LDREG		ITLB_SID_STRIDE(%r1), %r21
	LDREG		ITLB_SID_COUNT(%r1), %r22
	LDREG		ITLB_OFF_BASE(%r1), %arg0
	LDREG		ITLB_OFF_STRIDE(%r1), %arg1
	LDREG		ITLB_OFF_COUNT(%r1), %arg2
	LDREG		ITLB_LOOP(%r1), %arg3

	ADDIB=		-1, %arg3, fitoneloop	/* Preadjust and test */
	movb,<,n	%arg3, %r31, fitdone	/* If loop < 0, skip */
	copy		%arg0, %r28		/* Init base addr */

fitmanyloop:					/* Loop if LOOP >= 2 */
	mtsp		%r20, %sr1
	add		%r21, %r20, %r20	/* increment space */
	copy		%arg2, %r29		/* Init middle loop count */

fitmanymiddle:					/* Loop if LOOP >= 2 */
	ADDIB>		-1, %r31, fitmanymiddle	/* Adjusted inner loop decr */
	pitlbe		0(%sr1, %r28)
	pitlbe,m	%arg1(%sr1, %r28)	/* Last pitlbe and addr adjust */
	ADDIB>		-1, %r29, fitmanymiddle	/* Middle loop decr */
	copy		%arg3, %r31		/* Re-init inner loop count */

	movb,tr		%arg0, %r28, fitmanyloop /* Re-init base addr */
	ADDIB<=,n	-1, %r22, fitdone	/* Outer loop count decr */

fitoneloop:					/* Loop if LOOP = 1 */
	mtsp		%r20, %sr1
	copy		%arg0, %r28		/* init base addr */
	copy		%arg2, %r29		/* init middle loop count */

fitonemiddle:					/* Loop if LOOP = 1 */
	ADDIB>		-1, %r29, fitonemiddle	/* Middle loop count decr */
	pitlbe,m	%arg1(%sr1, %r28)	/* pitlbe for one loop */

	ADDIB>		-1, %r22, fitoneloop	/* Outer loop count decr */
	add		%r21, %r20, %r20		/* increment space */

fitdone:

	/* Flush Data Tlb */

	LDREG		DTLB_SID_BASE(%r1), %r20
	LDREG		DTLB_SID_STRIDE(%r1), %r21
	LDREG		DTLB_SID_COUNT(%r1), %r22
	LDREG		DTLB_OFF_BASE(%r1), %arg0
	LDREG		DTLB_OFF_STRIDE(%r1), %arg1
	LDREG		DTLB_OFF_COUNT(%r1), %arg2
	LDREG		DTLB_LOOP(%r1), %arg3

	ADDIB=		-1, %arg3, fdtoneloop	/* Preadjust and test */
	movb,<,n	%arg3, %r31, fdtdone	/* If loop < 0, skip */
	copy		%arg0, %r28		/* Init base addr */

fdtmanyloop:					/* Loop if LOOP >= 2 */
	mtsp		%r20, %sr1
	add		%r21, %r20, %r20	/* increment space */
	copy		%arg2, %r29		/* Init middle loop count */

fdtmanymiddle:					/* Loop if LOOP >= 2 */
	ADDIB>		-1, %r31, fdtmanymiddle	/* Adjusted inner loop decr */
	pdtlbe		0(%sr1, %r28)
	pdtlbe,m	%arg1(%sr1, %r28)	/* Last pdtlbe and addr adjust */
	ADDIB>		-1, %r29, fdtmanymiddle	/* Middle loop decr */
	copy		%arg3, %r31		/* Re-init inner loop count */

	movb,tr		%arg0, %r28, fdtmanyloop /* Re-init base addr */
	ADDIB<=,n	-1, %r22,fdtdone	/* Outer loop count decr */

fdtoneloop:					/* Loop if LOOP = 1 */
	mtsp		%r20, %sr1
	copy		%arg0, %r28		/* init base addr */
	copy		%arg2, %r29		/* init middle loop count */

fdtonemiddle:					/* Loop if LOOP = 1 */
	ADDIB>		-1, %r29, fdtonemiddle	/* Middle loop count decr */
	pdtlbe,m	%arg1(%sr1, %r28)	/* pdtlbe for one loop */

	ADDIB>		-1, %r22, fdtoneloop	/* Outer loop count decr */
	add		%r21, %r20, %r20	/* increment space */


fdtdone:
	/*
	 * Switch back to virtual mode
	 */
	/* pcxt_ssm_bug */
	rsm		PSW_SM_I, %r0
	load32		2f, %r1
	nop
	nop
	nop
	nop
	nop

	rsm		PSW_SM_Q, %r0		/* prep to load iia queue */
	mtctl		%r0, %cr17		/* Clear IIASQ tail */
	mtctl		%r0, %cr17		/* Clear IIASQ head */
	mtctl		%r1, %cr18		/* IIAOQ head */
	ldo		4(%r1), %r1
	mtctl		%r1, %cr18		/* IIAOQ tail */
	load32		KERNEL_PSW, %r1
	or		%r1, %r19, %r1	/* I-bit to state on entry */
	mtctl		%r1, %ipsw	/* restore I-bit (entire PSW) */
	rfi
	nop

2:      bv		%r0(%r2)
	nop

	.exit
	.procend
ENDPROC(flush_tlb_all_local)

	.import cache_info,data

ENTRY(flush_instruction_cache_local)
	.proc
	.callinfo NO_CALLS
	.entry

	mtsp		%r0, %sr1
	load32		cache_info, %r1

	/* Flush Instruction Cache */

	LDREG		ICACHE_BASE(%r1), %arg0
	LDREG		ICACHE_STRIDE(%r1), %arg1
	LDREG		ICACHE_COUNT(%r1), %arg2
	LDREG		ICACHE_LOOP(%r1), %arg3
	rsm             PSW_SM_I, %r22		/* No mmgt ops during loop*/
	ADDIB=		-1, %arg3, fioneloop	/* Preadjust and test */
	movb,<,n	%arg3, %r31, fisync	/* If loop < 0, do sync */

fimanyloop:					/* Loop if LOOP >= 2 */
	ADDIB>		-1, %r31, fimanyloop	/* Adjusted inner loop decr */
	fice            %r0(%sr1, %arg0)
	fice,m		%arg1(%sr1, %arg0)	/* Last fice and addr adjust */
	movb,tr		%arg3, %r31, fimanyloop	/* Re-init inner loop count */
	ADDIB<=,n	-1, %arg2, fisync	/* Outer loop decr */

fioneloop:					/* Loop if LOOP = 1 */
	ADDIB>		-1, %arg2, fioneloop	/* Outer loop count decr */
	fice,m		%arg1(%sr1, %arg0)	/* Fice for one loop */

fisync:
	sync
	mtsm		%r22			/* restore I-bit */
	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(flush_instruction_cache_local)


	.import cache_info, data
ENTRY(flush_data_cache_local)
	.proc
	.callinfo NO_CALLS
	.entry

	mtsp		%r0, %sr1
	load32 		cache_info, %r1

	/* Flush Data Cache */

	LDREG		DCACHE_BASE(%r1), %arg0
	LDREG		DCACHE_STRIDE(%r1), %arg1
	LDREG		DCACHE_COUNT(%r1), %arg2
	LDREG		DCACHE_LOOP(%r1), %arg3
	rsm		PSW_SM_I, %r22
	ADDIB=		-1, %arg3, fdoneloop	/* Preadjust and test */
	movb,<,n	%arg3, %r31, fdsync	/* If loop < 0, do sync */

fdmanyloop:					/* Loop if LOOP >= 2 */
	ADDIB>		-1, %r31, fdmanyloop	/* Adjusted inner loop decr */
	fdce		%r0(%sr1, %arg0)
	fdce,m		%arg1(%sr1, %arg0)	/* Last fdce and addr adjust */
	movb,tr		%arg3, %r31, fdmanyloop	/* Re-init inner loop count */
	ADDIB<=,n	-1, %arg2, fdsync	/* Outer loop decr */

fdoneloop:					/* Loop if LOOP = 1 */
	ADDIB>		-1, %arg2, fdoneloop	/* Outer loop count decr */
	fdce,m		%arg1(%sr1, %arg0)	/* Fdce for one loop */

fdsync:
	syncdma
	sync
	mtsm		%r22			/* restore I-bit */
	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(flush_data_cache_local)

	.align	16

ENTRY(copy_user_page_asm)
	.proc
	.callinfo NO_CALLS
	.entry

#ifdef CONFIG_64BIT
	/* PA8x00 CPUs can consume 2 loads or 1 store per cycle.
	 * Unroll the loop by hand and arrange insn appropriately.
	 * GCC probably can do this just as well.
	 */

	ldd		0(%r25), %r19
	ldi		(PAGE_SIZE / 128), %r1

	ldw		64(%r25), %r0		/* prefetch 1 cacheline ahead */
	ldw		128(%r25), %r0		/* prefetch 2 */

1:	ldd		8(%r25), %r20
	ldw		192(%r25), %r0		/* prefetch 3 */
	ldw		256(%r25), %r0		/* prefetch 4 */

	ldd		16(%r25), %r21
	ldd		24(%r25), %r22
	std		%r19, 0(%r26)
	std		%r20, 8(%r26)

	ldd		32(%r25), %r19
	ldd		40(%r25), %r20
	std		%r21, 16(%r26)
	std		%r22, 24(%r26)

	ldd		48(%r25), %r21
	ldd		56(%r25), %r22
	std		%r19, 32(%r26)
	std		%r20, 40(%r26)

	ldd		64(%r25), %r19
	ldd		72(%r25), %r20
	std		%r21, 48(%r26)
	std		%r22, 56(%r26)

	ldd		80(%r25), %r21
	ldd		88(%r25), %r22
	std		%r19, 64(%r26)
	std		%r20, 72(%r26)

	ldd		 96(%r25), %r19
	ldd		104(%r25), %r20
	std		%r21, 80(%r26)
	std		%r22, 88(%r26)

	ldd		112(%r25), %r21
	ldd		120(%r25), %r22
	std		%r19, 96(%r26)
	std		%r20, 104(%r26)

	ldo		128(%r25), %r25
	std		%r21, 112(%r26)
	std		%r22, 120(%r26)
	ldo		128(%r26), %r26

	/* conditional branches nullify on forward taken branch, and on
	 * non-taken backward branch. Note that .+4 is a backwards branch.
	 * The ldd should only get executed if the branch is taken.
	 */
	ADDIB>,n	-1, %r1, 1b		/* bundle 10 */
	ldd		0(%r25), %r19		/* start next loads */

#else

	/*
	 * This loop is optimized for PCXL/PCXL2 ldw/ldw and stw/stw
	 * bundles (very restricted rules for bundling).
	 * Note that until (if) we start saving
	 * the full 64 bit register values on interrupt, we can't
	 * use ldd/std on a 32 bit kernel.
	 */
	ldw		0(%r25), %r19
	ldi		(PAGE_SIZE / 64), %r1

1:
	ldw		4(%r25), %r20
	ldw		8(%r25), %r21
	ldw		12(%r25), %r22
	stw		%r19, 0(%r26)
	stw		%r20, 4(%r26)
	stw		%r21, 8(%r26)
	stw		%r22, 12(%r26)
	ldw		16(%r25), %r19
	ldw		20(%r25), %r20
	ldw		24(%r25), %r21
	ldw		28(%r25), %r22
	stw		%r19, 16(%r26)
	stw		%r20, 20(%r26)
	stw		%r21, 24(%r26)
	stw		%r22, 28(%r26)
	ldw		32(%r25), %r19
	ldw		36(%r25), %r20
	ldw		40(%r25), %r21
	ldw		44(%r25), %r22
	stw		%r19, 32(%r26)
	stw		%r20, 36(%r26)
	stw		%r21, 40(%r26)
	stw		%r22, 44(%r26)
	ldw		48(%r25), %r19
	ldw		52(%r25), %r20
	ldw		56(%r25), %r21
	ldw		60(%r25), %r22
	stw		%r19, 48(%r26)
	stw		%r20, 52(%r26)
	ldo		64(%r25), %r25
	stw		%r21, 56(%r26)
	stw		%r22, 60(%r26)
	ldo		64(%r26), %r26
	ADDIB>,n	-1, %r1, 1b
	ldw		0(%r25), %r19
#endif
	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(copy_user_page_asm)

/*
 * NOTE: Code in clear_user_page has a hard coded dependency on the
 *       maximum alias boundary being 4 Mb. We've been assured by the
 *       parisc chip designers that there will not ever be a parisc
 *       chip with a larger alias boundary (Never say never :-) ).
 *
 *       Subtle: the dtlb miss handlers support the temp alias region by
 *       "knowing" that if a dtlb miss happens within the temp alias
 *       region it must have occurred while in clear_user_page. Since
 *       this routine makes use of processor local translations, we
 *       don't want to insert them into the kernel page table. Instead,
 *       we load up some general registers (they need to be registers
 *       which aren't shadowed) with the physical page numbers (preshifted
 *       for tlb insertion) needed to insert the translations. When we
 *       miss on the translation, the dtlb miss handler inserts the
 *       translation into the tlb using these values:
 *
 *          %r26 physical page (shifted for tlb insert) of "to" translation
 *          %r23 physical page (shifted for tlb insert) of "from" translation
 */

#if 0

	/*
	 * We can't do this since copy_user_page is used to bring in
	 * file data that might have instructions. Since the data would
	 * then need to be flushed out so the i-fetch can see it, it
	 * makes more sense to just copy through the kernel translation
	 * and flush it.
	 *
	 * I'm still keeping this around because it may be possible to
	 * use it if more information is passed into copy_user_page().
	 * Have to do some measurements to see if it is worthwhile to
	 * lobby for such a change.
	 */

ENTRY(copy_user_page_asm)
	.proc
	.callinfo NO_CALLS
	.entry

	ldil		L%(__PAGE_OFFSET), %r1
	sub		%r26, %r1, %r26
	sub		%r25, %r1, %r23		/* move physical addr into non shadowed reg */

	ldil		L%(TMPALIAS_MAP_START), %r28
	/* FIXME for different page sizes != 4k */
#ifdef CONFIG_64BIT
	extrd,u		%r26,56,32, %r26		/* convert phys addr to tlb insert format */
	extrd,u		%r23,56,32, %r23		/* convert phys addr to tlb insert format */
	depd		%r24,63,22, %r28		/* Form aliased virtual address 'to' */
	depdi		0, 63,12, %r28		/* Clear any offset bits */
	copy		%r28, %r29
	depdi		1, 41,1, %r29		/* Form aliased virtual address 'from' */
#else
	extrw,u		%r26, 24,25, %r26	/* convert phys addr to tlb insert format */
	extrw,u		%r23, 24,25, %r23	/* convert phys addr to tlb insert format */
	depw		%r24, 31,22, %r28	/* Form aliased virtual address 'to' */
	depwi		0, 31,12, %r28		/* Clear any offset bits */
	copy		%r28, %r29
	depwi		1, 9,1, %r29		/* Form aliased virtual address 'from' */
#endif

	/* Purge any old translations */

	pdtlb		0(%r28)
	pdtlb		0(%r29)

	ldi		64, %r1

	/*
	 * This loop is optimized for PCXL/PCXL2 ldw/ldw and stw/stw
	 * bundles (very restricted rules for bundling). It probably
	 * does OK on PCXU and better, but we could do better with
	 * ldd/std instructions. Note that until (if) we start saving
	 * the full 64 bit register values on interrupt, we can't
	 * use ldd/std on a 32 bit kernel.
	 */


1:
	ldw		0(%r29), %r19
	ldw		4(%r29), %r20
	ldw		8(%r29), %r21
	ldw		12(%r29), %r22
	stw		%r19, 0(%r28)
	stw		%r20, 4(%r28)
	stw		%r21, 8(%r28)
	stw		%r22, 12(%r28)
	ldw		16(%r29), %r19
	ldw		20(%r29), %r20
	ldw		24(%r29), %r21
	ldw		28(%r29), %r22
	stw		%r19, 16(%r28)
	stw		%r20, 20(%r28)
	stw		%r21, 24(%r28)
	stw		%r22, 28(%r28)
	ldw		32(%r29), %r19
	ldw		36(%r29), %r20
	ldw		40(%r29), %r21
	ldw		44(%r29), %r22
	stw		%r19, 32(%r28)
	stw		%r20, 36(%r28)
	stw		%r21, 40(%r28)
	stw		%r22, 44(%r28)
	ldw		48(%r29), %r19
	ldw		52(%r29), %r20
	ldw		56(%r29), %r21
	ldw		60(%r29), %r22
	stw		%r19, 48(%r28)
	stw		%r20, 52(%r28)
	stw		%r21, 56(%r28)
	stw		%r22, 60(%r28)
	ldo		64(%r28), %r28
	ADDIB>		-1, %r1,1b
	ldo		64(%r29), %r29

	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(copy_user_page_asm)
#endif

ENTRY(__clear_user_page_asm)
	.proc
	.callinfo NO_CALLS
	.entry

	tophys_r1	%r26

	ldil		L%(TMPALIAS_MAP_START), %r28
#ifdef CONFIG_64BIT
#if (TMPALIAS_MAP_START >= 0x80000000)
	depdi		0, 31,32, %r28		/* clear any sign extension */
	/* FIXME: page size dependend */
#endif
	extrd,u		%r26, 56,32, %r26	/* convert phys addr to tlb insert format */
	depd		%r25, 63,22, %r28	/* Form aliased virtual address 'to' */
	depdi		0, 63,12, %r28		/* Clear any offset bits */
#else
	extrw,u		%r26, 24,25, %r26	/* convert phys addr to tlb insert format */
	depw		%r25, 31,22, %r28	/* Form aliased virtual address 'to' */
	depwi		0, 31,12, %r28		/* Clear any offset bits */
#endif

	/* Purge any old translation */

	pdtlb		0(%r28)

#ifdef CONFIG_64BIT
	ldi		(PAGE_SIZE / 128), %r1

	/* PREFETCH (Write) has not (yet) been proven to help here */
	/* #define	PREFETCHW_OP	ldd		256(%0), %r0 */

1:	std		%r0, 0(%r28)
	std		%r0, 8(%r28)
	std		%r0, 16(%r28)
	std		%r0, 24(%r28)
	std		%r0, 32(%r28)
	std		%r0, 40(%r28)
	std		%r0, 48(%r28)
	std		%r0, 56(%r28)
	std		%r0, 64(%r28)
	std		%r0, 72(%r28)
	std		%r0, 80(%r28)
	std		%r0, 88(%r28)
	std		%r0, 96(%r28)
	std		%r0, 104(%r28)
	std		%r0, 112(%r28)
	std		%r0, 120(%r28)
	ADDIB>		-1, %r1, 1b
	ldo		128(%r28), %r28

#else	/* ! CONFIG_64BIT */
	ldi		(PAGE_SIZE / 64), %r1

1:
	stw		%r0, 0(%r28)
	stw		%r0, 4(%r28)
	stw		%r0, 8(%r28)
	stw		%r0, 12(%r28)
	stw		%r0, 16(%r28)
	stw		%r0, 20(%r28)
	stw		%r0, 24(%r28)
	stw		%r0, 28(%r28)
	stw		%r0, 32(%r28)
	stw		%r0, 36(%r28)
	stw		%r0, 40(%r28)
	stw		%r0, 44(%r28)
	stw		%r0, 48(%r28)
	stw		%r0, 52(%r28)
	stw		%r0, 56(%r28)
	stw		%r0, 60(%r28)
	ADDIB>		-1, %r1, 1b
	ldo		64(%r28), %r28
#endif	/* CONFIG_64BIT */

	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(__clear_user_page_asm)

ENTRY(flush_kernel_dcache_page_asm)
	.proc
	.callinfo NO_CALLS
	.entry

	ldil		L%dcache_stride, %r1
	ldw		R%dcache_stride(%r1), %r23

#ifdef CONFIG_64BIT
	depdi,z		1, 63-PAGE_SHIFT,1, %r25
#else
	depwi,z		1, 31-PAGE_SHIFT,1, %r25
#endif
	add		%r26, %r25, %r25
	sub		%r25, %r23, %r25


1:      fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	fdc,m		%r23(%r26)
	CMPB<<		%r26, %r25,1b
	fdc,m		%r23(%r26)

	sync
	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(flush_kernel_dcache_page_asm)
	
ENTRY(flush_user_dcache_page)
	.proc
	.callinfo NO_CALLS
	.entry

	ldil		L%dcache_stride, %r1
	ldw		R%dcache_stride(%r1), %r23

#ifdef CONFIG_64BIT
	depdi,z		1,63-PAGE_SHIFT,1, %r25
#else
	depwi,z		1,31-PAGE_SHIFT,1, %r25
#endif
	add		%r26, %r25, %r25
	sub		%r25, %r23, %r25


1:      fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	fdc,m		%r23(%sr3, %r26)
	CMPB<<		%r26, %r25,1b
	fdc,m		%r23(%sr3, %r26)

	sync
	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(flush_user_dcache_page)

ENTRY(flush_user_icache_page)
	.proc
	.callinfo NO_CALLS
	.entry

	ldil		L%dcache_stride, %r1
	ldw		R%dcache_stride(%r1), %r23

#ifdef CONFIG_64BIT
	depdi,z		1, 63-PAGE_SHIFT,1, %r25
#else
	depwi,z		1, 31-PAGE_SHIFT,1, %r25
#endif
	add		%r26, %r25, %r25
	sub		%r25, %r23, %r25


1:      fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	fic,m		%r23(%sr3, %r26)
	CMPB<<		%r26, %r25,1b
	fic,m		%r23(%sr3, %r26)

	sync
	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(flush_user_icache_page)


ENTRY(purge_kernel_dcache_page)
	.proc
	.callinfo NO_CALLS
	.entry

	ldil		L%dcache_stride, %r1
	ldw		R%dcache_stride(%r1), %r23

#ifdef CONFIG_64BIT
	depdi,z		1, 63-PAGE_SHIFT,1, %r25
#else
	depwi,z		1, 31-PAGE_SHIFT,1, %r25
#endif
	add		%r26, %r25, %r25
	sub		%r25, %r23, %r25

1:      pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	pdc,m		%r23(%r26)
	CMPB<<		%r26, %r25, 1b
	pdc,m		%r23(%r26)

	sync
	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(purge_kernel_dcache_page)

#if 0
	/* Currently not used, but it still is a possible alternate
	 * solution.
	 */

ENTRY(flush_alias_page)
	.proc
	.callinfo NO_CALLS
	.entry

	tophys_r1		%r26

	ldil		L%(TMPALIAS_MAP_START), %r28
#ifdef CONFIG_64BIT
	extrd,u		%r26, 56,32, %r26	/* convert phys addr to tlb insert format */
	depd		%r25, 63,22, %r28	/* Form aliased virtual address 'to' */
	depdi		0, 63,12, %r28		/* Clear any offset bits */
#else
	extrw,u		%r26, 24,25, %r26	/* convert phys addr to tlb insert format */
	depw		%r25, 31,22, %r28	/* Form aliased virtual address 'to' */
	depwi		0, 31,12, %r28		/* Clear any offset bits */
#endif

	/* Purge any old translation */

	pdtlb		0(%r28)

	ldil		L%dcache_stride, %r1
	ldw		R%dcache_stride(%r1), %r23

#ifdef CONFIG_64BIT
	depdi,z		1, 63-PAGE_SHIFT,1, %r29
#else
	depwi,z		1, 31-PAGE_SHIFT,1, %r29
#endif
	add		%r28, %r29, %r29
	sub		%r29, %r23, %r29

1:      fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	fdc,m		%r23(%r28)
	CMPB<<		%r28, %r29, 1b
	fdc,m		%r23(%r28)

	sync
	bv		%r0(%r2)
	nop
	.exit

	.procend
#endif

	.export flush_user_dcache_range_asm

flush_user_dcache_range_asm:
	.proc
	.callinfo NO_CALLS
	.entry

	ldil		L%dcache_stride, %r1
	ldw		R%dcache_stride(%r1), %r23
	ldo		-1(%r23), %r21
	ANDCM		%r26, %r21, %r26

1:      CMPB<<,n	%r26, %r25, 1b
	fdc,m		%r23(%sr3, %r26)

	sync
	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(flush_alias_page)

ENTRY(flush_kernel_dcache_range_asm)
	.proc
	.callinfo NO_CALLS
	.entry

	ldil		L%dcache_stride, %r1
	ldw		R%dcache_stride(%r1), %r23
	ldo		-1(%r23), %r21
	ANDCM		%r26, %r21, %r26

1:      CMPB<<,n	%r26, %r25,1b
	fdc,m		%r23(%r26)

	sync
	syncdma
	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(flush_kernel_dcache_range_asm)

ENTRY(flush_user_icache_range_asm)
	.proc
	.callinfo NO_CALLS
	.entry

	ldil		L%icache_stride, %r1
	ldw		R%icache_stride(%r1), %r23
	ldo		-1(%r23), %r21
	ANDCM		%r26, %r21, %r26

1:      CMPB<<,n	%r26, %r25,1b
	fic,m		%r23(%sr3, %r26)

	sync
	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(flush_user_icache_range_asm)

ENTRY(flush_kernel_icache_page)
	.proc
	.callinfo NO_CALLS
	.entry

	ldil		L%icache_stride, %r1
	ldw		R%icache_stride(%r1), %r23

#ifdef CONFIG_64BIT
	depdi,z		1, 63-PAGE_SHIFT,1, %r25
#else
	depwi,z		1, 31-PAGE_SHIFT,1, %r25
#endif
	add		%r26, %r25, %r25
	sub		%r25, %r23, %r25


1:      fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	fic,m		%r23(%sr4, %r26)
	CMPB<<		%r26, %r25, 1b
	fic,m		%r23(%sr4, %r26)

	sync
	bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(flush_kernel_icache_page)

ENTRY(flush_kernel_icache_range_asm)
	.proc
	.callinfo NO_CALLS
	.entry

	ldil		L%icache_stride, %r1
	ldw		R%icache_stride(%r1), %r23
	ldo		-1(%r23), %r21
	ANDCM		%r26, %r21, %r26

1:      CMPB<<,n	%r26, %r25, 1b
	fic,m		%r23(%sr4, %r26)

	sync
	bv		%r0(%r2)
	nop
	.exit
	.procend
ENDPROC(flush_kernel_icache_range_asm)

	/* align should cover use of rfi in disable_sr_hashing_asm and
	 * srdis_done.
	 */
	.align	256
ENTRY(disable_sr_hashing_asm)
	.proc
	.callinfo NO_CALLS
	.entry

	/*
	 * Switch to real mode
	 */
	/* pcxt_ssm_bug */
	rsm		PSW_SM_I, %r0
	load32		PA(1f), %r1
	nop
	nop
	nop
	nop
	nop

	rsm		PSW_SM_Q, %r0		/* prep to load iia queue */
	mtctl		%r0, %cr17		/* Clear IIASQ tail */
	mtctl		%r0, %cr17		/* Clear IIASQ head */
	mtctl		%r1, %cr18		/* IIAOQ head */
	ldo		4(%r1), %r1
	mtctl		%r1, %cr18		/* IIAOQ tail */
	load32		REAL_MODE_PSW, %r1
	mtctl		%r1, %ipsw
	rfi
	nop

1:      cmpib,=,n	SRHASH_PCXST, %r26,srdis_pcxs
	cmpib,=,n	SRHASH_PCXL, %r26,srdis_pcxl
	cmpib,=,n	SRHASH_PA20, %r26,srdis_pa20
	b,n		srdis_done

srdis_pcxs:

	/* Disable Space Register Hashing for PCXS,PCXT,PCXT' */

	.word		0x141c1a00		/* mfdiag %dr0, %r28 */
	.word		0x141c1a00		/* must issue twice */
	depwi		0,18,1, %r28		/* Clear DHE (dcache hash enable) */
	depwi		0,20,1, %r28		/* Clear IHE (icache hash enable) */
	.word		0x141c1600		/* mtdiag %r28, %dr0 */
	.word		0x141c1600		/* must issue twice */
	b,n		srdis_done

srdis_pcxl:

	/* Disable Space Register Hashing for PCXL */

	.word		0x141c0600		/* mfdiag %dr0, %r28 */
	depwi           0,28,2, %r28		/* Clear DHASH_EN & IHASH_EN */
	.word		0x141c0240		/* mtdiag %r28, %dr0 */
	b,n		srdis_done

srdis_pa20:

	/* Disable Space Register Hashing for PCXU,PCXU+,PCXW,PCXW+,PCXW2 */

	.word		0x144008bc		/* mfdiag %dr2, %r28 */
	depdi		0, 54,1, %r28		/* clear DIAG_SPHASH_ENAB (bit 54) */
	.word		0x145c1840		/* mtdiag %r28, %dr2 */


srdis_done:
	/* Switch back to virtual mode */
	rsm		PSW_SM_I, %r0		/* prep to load iia queue */
	load32 	   	2f, %r1
	nop
	nop
	nop
	nop
	nop

	rsm		PSW_SM_Q, %r0		/* prep to load iia queue */
	mtctl		%r0, %cr17		/* Clear IIASQ tail */
	mtctl		%r0, %cr17		/* Clear IIASQ head */
	mtctl		%r1, %cr18		/* IIAOQ head */
	ldo		4(%r1), %r1
	mtctl		%r1, %cr18		/* IIAOQ tail */
	load32		KERNEL_PSW, %r1
	mtctl		%r1, %ipsw
	rfi
	nop

2:      bv		%r0(%r2)
	nop
	.exit

	.procend
ENDPROC(disable_sr_hashing_asm)

	.end