summaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm/ppc_asm.h
blob: b5d023680801b982cb5af2d82a21e943a7af57b9 (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
/*
 * Copyright (C) 1995-1999 Gary Thomas, Paul Mackerras, Cort Dougan.
 */
#ifndef _ASM_POWERPC_PPC_ASM_H
#define _ASM_POWERPC_PPC_ASM_H

#include <linux/stringify.h>
#include <asm/asm-compat.h>
#include <asm/processor.h>
#include <asm/ppc-opcode.h>
#include <asm/firmware.h>
#include <asm/feature-fixups.h>

#ifdef __ASSEMBLY__

#define SZL			(BITS_PER_LONG/8)

/*
 * Stuff for accurate CPU time accounting.
 * These macros handle transitions between user and system state
 * in exception entry and exit and accumulate time to the
 * user_time and system_time fields in the paca.
 */

#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
#define ACCOUNT_CPU_USER_ENTRY(ptr, ra, rb)
#define ACCOUNT_CPU_USER_EXIT(ptr, ra, rb)
#define ACCOUNT_STOLEN_TIME
#else
#define ACCOUNT_CPU_USER_ENTRY(ptr, ra, rb)				\
	MFTB(ra);			/* get timebase */		\
	PPC_LL	rb, ACCOUNT_STARTTIME_USER(ptr);			\
	PPC_STL	ra, ACCOUNT_STARTTIME(ptr);				\
	subf	rb,rb,ra;		/* subtract start value */	\
	PPC_LL	ra, ACCOUNT_USER_TIME(ptr);				\
	add	ra,ra,rb;		/* add on to user time */	\
	PPC_STL	ra, ACCOUNT_USER_TIME(ptr);				\

#define ACCOUNT_CPU_USER_EXIT(ptr, ra, rb)				\
	MFTB(ra);			/* get timebase */		\
	PPC_LL	rb, ACCOUNT_STARTTIME(ptr);				\
	PPC_STL	ra, ACCOUNT_STARTTIME_USER(ptr);			\
	subf	rb,rb,ra;		/* subtract start value */	\
	PPC_LL	ra, ACCOUNT_SYSTEM_TIME(ptr);				\
	add	ra,ra,rb;		/* add on to system time */	\
	PPC_STL	ra, ACCOUNT_SYSTEM_TIME(ptr)

#ifdef CONFIG_PPC_SPLPAR
#define ACCOUNT_STOLEN_TIME						\
BEGIN_FW_FTR_SECTION;							\
	beq	33f;							\
	/* from user - see if there are any DTL entries to process */	\
	ld	r10,PACALPPACAPTR(r13);	/* get ptr to VPA */		\
	ld	r11,PACA_DTL_RIDX(r13);	/* get log read index */	\
	addi	r10,r10,LPPACA_DTLIDX;					\
	LDX_BE	r10,0,r10;		/* get log write index */	\
	cmpd	cr1,r11,r10;						\
	beq+	cr1,33f;						\
	bl	accumulate_stolen_time;				\
	ld	r12,_MSR(r1);						\
	andi.	r10,r12,MSR_PR;		/* Restore cr0 (coming from user) */ \
33:									\
END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR)

#else  /* CONFIG_PPC_SPLPAR */
#define ACCOUNT_STOLEN_TIME

#endif /* CONFIG_PPC_SPLPAR */

#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */

/*
 * Macros for storing registers into and loading registers from
 * exception frames.
 */
#ifdef __powerpc64__
#define SAVE_GPR(n, base)	std	n,GPR0+8*(n)(base)
#define REST_GPR(n, base)	ld	n,GPR0+8*(n)(base)
#define SAVE_NVGPRS(base)	SAVE_8GPRS(14, base); SAVE_10GPRS(22, base)
#define REST_NVGPRS(base)	REST_8GPRS(14, base); REST_10GPRS(22, base)
#else
#define SAVE_GPR(n, base)	stw	n,GPR0+4*(n)(base)
#define REST_GPR(n, base)	lwz	n,GPR0+4*(n)(base)
#define SAVE_NVGPRS(base)	stmw	13, GPR0+4*13(base)
#define REST_NVGPRS(base)	lmw	13, GPR0+4*13(base)
#endif

#define SAVE_2GPRS(n, base)	SAVE_GPR(n, base); SAVE_GPR(n+1, base)
#define SAVE_4GPRS(n, base)	SAVE_2GPRS(n, base); SAVE_2GPRS(n+2, base)
#define SAVE_8GPRS(n, base)	SAVE_4GPRS(n, base); SAVE_4GPRS(n+4, base)
#define SAVE_10GPRS(n, base)	SAVE_8GPRS(n, base); SAVE_2GPRS(n+8, base)
#define REST_2GPRS(n, base)	REST_GPR(n, base); REST_GPR(n+1, base)
#define REST_4GPRS(n, base)	REST_2GPRS(n, base); REST_2GPRS(n+2, base)
#define REST_8GPRS(n, base)	REST_4GPRS(n, base); REST_4GPRS(n+4, base)
#define REST_10GPRS(n, base)	REST_8GPRS(n, base); REST_2GPRS(n+8, base)

#define SAVE_FPR(n, base)	stfd	n,8*TS_FPRWIDTH*(n)(base)
#define SAVE_2FPRS(n, base)	SAVE_FPR(n, base); SAVE_FPR(n+1, base)
#define SAVE_4FPRS(n, base)	SAVE_2FPRS(n, base); SAVE_2FPRS(n+2, base)
#define SAVE_8FPRS(n, base)	SAVE_4FPRS(n, base); SAVE_4FPRS(n+4, base)
#define SAVE_16FPRS(n, base)	SAVE_8FPRS(n, base); SAVE_8FPRS(n+8, base)
#define SAVE_32FPRS(n, base)	SAVE_16FPRS(n, base); SAVE_16FPRS(n+16, base)
#define REST_FPR(n, base)	lfd	n,8*TS_FPRWIDTH*(n)(base)
#define REST_2FPRS(n, base)	REST_FPR(n, base); REST_FPR(n+1, base)
#define REST_4FPRS(n, base)	REST_2FPRS(n, base); REST_2FPRS(n+2, base)
#define REST_8FPRS(n, base)	REST_4FPRS(n, base); REST_4FPRS(n+4, base)
#define REST_16FPRS(n, base)	REST_8FPRS(n, base); REST_8FPRS(n+8, base)
#define REST_32FPRS(n, base)	REST_16FPRS(n, base); REST_16FPRS(n+16, base)

#define SAVE_VR(n,b,base)	li b,16*(n);  stvx n,base,b
#define SAVE_2VRS(n,b,base)	SAVE_VR(n,b,base); SAVE_VR(n+1,b,base)
#define SAVE_4VRS(n,b,base)	SAVE_2VRS(n,b,base); SAVE_2VRS(n+2,b,base)
#define SAVE_8VRS(n,b,base)	SAVE_4VRS(n,b,base); SAVE_4VRS(n+4,b,base)
#define SAVE_16VRS(n,b,base)	SAVE_8VRS(n,b,base); SAVE_8VRS(n+8,b,base)
#define SAVE_32VRS(n,b,base)	SAVE_16VRS(n,b,base); SAVE_16VRS(n+16,b,base)
#define REST_VR(n,b,base)	li b,16*(n); lvx n,base,b
#define REST_2VRS(n,b,base)	REST_VR(n,b,base); REST_VR(n+1,b,base)
#define REST_4VRS(n,b,base)	REST_2VRS(n,b,base); REST_2VRS(n+2,b,base)
#define REST_8VRS(n,b,base)	REST_4VRS(n,b,base); REST_4VRS(n+4,b,base)
#define REST_16VRS(n,b,base)	REST_8VRS(n,b,base); REST_8VRS(n+8,b,base)
#define REST_32VRS(n,b,base)	REST_16VRS(n,b,base); REST_16VRS(n+16,b,base)

#ifdef __BIG_ENDIAN__
#define STXVD2X_ROT(n,b,base)		STXVD2X(n,b,base)
#define LXVD2X_ROT(n,b,base)		LXVD2X(n,b,base)
#else
#define STXVD2X_ROT(n,b,base)		XXSWAPD(n,n);		\
					STXVD2X(n,b,base);	\
					XXSWAPD(n,n)

#define LXVD2X_ROT(n,b,base)		LXVD2X(n,b,base);	\
					XXSWAPD(n,n)
#endif
/* Save the lower 32 VSRs in the thread VSR region */
#define SAVE_VSR(n,b,base)	li b,16*(n);  STXVD2X_ROT(n,R##base,R##b)
#define SAVE_2VSRS(n,b,base)	SAVE_VSR(n,b,base); SAVE_VSR(n+1,b,base)
#define SAVE_4VSRS(n,b,base)	SAVE_2VSRS(n,b,base); SAVE_2VSRS(n+2,b,base)
#define SAVE_8VSRS(n,b,base)	SAVE_4VSRS(n,b,base); SAVE_4VSRS(n+4,b,base)
#define SAVE_16VSRS(n,b,base)	SAVE_8VSRS(n,b,base); SAVE_8VSRS(n+8,b,base)
#define SAVE_32VSRS(n,b,base)	SAVE_16VSRS(n,b,base); SAVE_16VSRS(n+16,b,base)
#define REST_VSR(n,b,base)	li b,16*(n); LXVD2X_ROT(n,R##base,R##b)
#define REST_2VSRS(n,b,base)	REST_VSR(n,b,base); REST_VSR(n+1,b,base)
#define REST_4VSRS(n,b,base)	REST_2VSRS(n,b,base); REST_2VSRS(n+2,b,base)
#define REST_8VSRS(n,b,base)	REST_4VSRS(n,b,base); REST_4VSRS(n+4,b,base)
#define REST_16VSRS(n,b,base)	REST_8VSRS(n,b,base); REST_8VSRS(n+8,b,base)
#define REST_32VSRS(n,b,base)	REST_16VSRS(n,b,base); REST_16VSRS(n+16,b,base)

/*
 * b = base register for addressing, o = base offset from register of 1st EVR
 * n = first EVR, s = scratch
 */
#define SAVE_EVR(n,s,b,o)	evmergehi s,s,n; stw s,o+4*(n)(b)
#define SAVE_2EVRS(n,s,b,o)	SAVE_EVR(n,s,b,o); SAVE_EVR(n+1,s,b,o)
#define SAVE_4EVRS(n,s,b,o)	SAVE_2EVRS(n,s,b,o); SAVE_2EVRS(n+2,s,b,o)
#define SAVE_8EVRS(n,s,b,o)	SAVE_4EVRS(n,s,b,o); SAVE_4EVRS(n+4,s,b,o)
#define SAVE_16EVRS(n,s,b,o)	SAVE_8EVRS(n,s,b,o); SAVE_8EVRS(n+8,s,b,o)
#define SAVE_32EVRS(n,s,b,o)	SAVE_16EVRS(n,s,b,o); SAVE_16EVRS(n+16,s,b,o)
#define REST_EVR(n,s,b,o)	lwz s,o+4*(n)(b); evmergelo n,s,n
#define REST_2EVRS(n,s,b,o)	REST_EVR(n,s,b,o); REST_EVR(n+1,s,b,o)
#define REST_4EVRS(n,s,b,o)	REST_2EVRS(n,s,b,o); REST_2EVRS(n+2,s,b,o)
#define REST_8EVRS(n,s,b,o)	REST_4EVRS(n,s,b,o); REST_4EVRS(n+4,s,b,o)
#define REST_16EVRS(n,s,b,o)	REST_8EVRS(n,s,b,o); REST_8EVRS(n+8,s,b,o)
#define REST_32EVRS(n,s,b,o)	REST_16EVRS(n,s,b,o); REST_16EVRS(n+16,s,b,o)

/* Macros to adjust thread priority for hardware multithreading */
#define HMT_VERY_LOW	or	31,31,31	# very low priority
#define HMT_LOW		or	1,1,1
#define HMT_MEDIUM_LOW  or	6,6,6		# medium low priority
#define HMT_MEDIUM	or	2,2,2
#define HMT_MEDIUM_HIGH or	5,5,5		# medium high priority
#define HMT_HIGH	or	3,3,3
#define HMT_EXTRA_HIGH	or	7,7,7		# power7 only

#ifdef CONFIG_PPC64
#define ULONG_SIZE 	8
#else
#define ULONG_SIZE	4
#endif
#define __VCPU_GPR(n)	(VCPU_GPRS + (n * ULONG_SIZE))
#define VCPU_GPR(n)	__VCPU_GPR(__REG_##n)

#ifdef __KERNEL__
#ifdef CONFIG_PPC64

#define STACKFRAMESIZE 256
#define __STK_REG(i)   (112 + ((i)-14)*8)
#define STK_REG(i)     __STK_REG(__REG_##i)

#ifdef PPC64_ELF_ABI_v2
#define STK_GOT		24
#define __STK_PARAM(i)	(32 + ((i)-3)*8)
#else
#define STK_GOT		40
#define __STK_PARAM(i)	(48 + ((i)-3)*8)
#endif
#define STK_PARAM(i)	__STK_PARAM(__REG_##i)

#ifdef PPC64_ELF_ABI_v2

#define _GLOBAL(name) \
	.align 2 ; \
	.type name,@function; \
	.globl name; \
name:

#define _GLOBAL_TOC(name) \
	.align 2 ; \
	.type name,@function; \
	.globl name; \
name: \
0:	addis r2,r12,(.TOC.-0b)@ha; \
	addi r2,r2,(.TOC.-0b)@l; \
	.localentry name,.-name

#define DOTSYM(a)	a

#else

#define XGLUE(a,b) a##b
#define GLUE(a,b) XGLUE(a,b)

#define _GLOBAL(name) \
	.align 2 ; \
	.globl name; \
	.globl GLUE(.,name); \
	.pushsection ".opd","aw"; \
name: \
	.quad GLUE(.,name); \
	.quad .TOC.@tocbase; \
	.quad 0; \
	.popsection; \
	.type GLUE(.,name),@function; \
GLUE(.,name):

#define _GLOBAL_TOC(name) _GLOBAL(name)

#define DOTSYM(a)	GLUE(.,a)

#endif

#else /* 32-bit */

#define _ENTRY(n)	\
	.globl n;	\
n:

#define _GLOBAL(n)	\
	.stabs __stringify(n:F-1),N_FUN,0,0,n;\
	.globl n;	\
n:

#define _GLOBAL_TOC(name) _GLOBAL(name)

#endif

/*
 * __kprobes (the C annotation) puts the symbol into the .kprobes.text
 * section, which gets emitted at the end of regular text.
 *
 * _ASM_NOKPROBE_SYMBOL and NOKPROBE_SYMBOL just adds the symbol to
 * a blacklist. The former is for core kprobe functions/data, the
 * latter is for those that incdentially must be excluded from probing
 * and allows them to be linked at more optimal location within text.
 */
#ifdef CONFIG_KPROBES
#define _ASM_NOKPROBE_SYMBOL(entry)			\
	.pushsection "_kprobe_blacklist","aw";		\
	PPC_LONG (entry) ;				\
	.popsection
#else
#define _ASM_NOKPROBE_SYMBOL(entry)
#endif

#define FUNC_START(name)	_GLOBAL(name)
#define FUNC_END(name)

/* 
 * LOAD_REG_IMMEDIATE(rn, expr)
 *   Loads the value of the constant expression 'expr' into register 'rn'
 *   using immediate instructions only.  Use this when it's important not
 *   to reference other data (i.e. on ppc64 when the TOC pointer is not
 *   valid) and when 'expr' is a constant or absolute address.
 *
 * LOAD_REG_ADDR(rn, name)
 *   Loads the address of label 'name' into register 'rn'.  Use this when
 *   you don't particularly need immediate instructions only, but you need
 *   the whole address in one register (e.g. it's a structure address and
 *   you want to access various offsets within it).  On ppc32 this is
 *   identical to LOAD_REG_IMMEDIATE.
 *
 * LOAD_REG_ADDR_PIC(rn, name)
 *   Loads the address of label 'name' into register 'run'. Use this when
 *   the kernel doesn't run at the linked or relocated address. Please
 *   note that this macro will clobber the lr register.
 *
 * LOAD_REG_ADDRBASE(rn, name)
 * ADDROFF(name)
 *   LOAD_REG_ADDRBASE loads part of the address of label 'name' into
 *   register 'rn'.  ADDROFF(name) returns the remainder of the address as
 *   a constant expression.  ADDROFF(name) is a signed expression < 16 bits
 *   in size, so is suitable for use directly as an offset in load and store
 *   instructions.  Use this when loading/storing a single word or less as:
 *      LOAD_REG_ADDRBASE(rX, name)
 *      ld	rY,ADDROFF(name)(rX)
 */

/* Be careful, this will clobber the lr register. */
#define LOAD_REG_ADDR_PIC(reg, name)		\
	bl	0f;				\
0:	mflr	reg;				\
	addis	reg,reg,(name - 0b)@ha;		\
	addi	reg,reg,(name - 0b)@l;

#ifdef __powerpc64__
#ifdef HAVE_AS_ATHIGH
#define __AS_ATHIGH high
#else
#define __AS_ATHIGH h
#endif
#define LOAD_REG_IMMEDIATE(reg,expr)		\
	lis     reg,(expr)@highest;		\
	ori     reg,reg,(expr)@higher;	\
	rldicr  reg,reg,32,31;		\
	oris    reg,reg,(expr)@__AS_ATHIGH;	\
	ori     reg,reg,(expr)@l;

#define LOAD_REG_ADDR(reg,name)			\
	ld	reg,name@got(r2)

#define LOAD_REG_ADDRBASE(reg,name)	LOAD_REG_ADDR(reg,name)
#define ADDROFF(name)			0

/* offsets for stack frame layout */
#define LRSAVE	16

#else /* 32-bit */

#define LOAD_REG_IMMEDIATE(reg,expr)		\
	lis	reg,(expr)@ha;		\
	addi	reg,reg,(expr)@l;

#define LOAD_REG_ADDR(reg,name)		LOAD_REG_IMMEDIATE(reg, name)

#define LOAD_REG_ADDRBASE(reg, name)	lis	reg,name@ha
#define ADDROFF(name)			name@l

/* offsets for stack frame layout */
#define LRSAVE	4

#endif

/* various errata or part fixups */
#ifdef CONFIG_PPC601_SYNC_FIX
#define SYNC				\
BEGIN_FTR_SECTION			\
	sync;				\
	isync;				\
END_FTR_SECTION_IFSET(CPU_FTR_601)
#define SYNC_601			\
BEGIN_FTR_SECTION			\
	sync;				\
END_FTR_SECTION_IFSET(CPU_FTR_601)
#define ISYNC_601			\
BEGIN_FTR_SECTION			\
	isync;				\
END_FTR_SECTION_IFSET(CPU_FTR_601)
#else
#define	SYNC
#define SYNC_601
#define ISYNC_601
#endif

#if defined(CONFIG_PPC_CELL) || defined(CONFIG_PPC_FSL_BOOK3E)
#define MFTB(dest)			\
90:	mfspr dest, SPRN_TBRL;		\
BEGIN_FTR_SECTION_NESTED(96);		\
	cmpwi dest,0;			\
	beq-  90b;			\
END_FTR_SECTION_NESTED(CPU_FTR_CELL_TB_BUG, CPU_FTR_CELL_TB_BUG, 96)
#else
#define MFTB(dest)			MFTBL(dest)
#endif

#ifdef CONFIG_PPC_8xx
#define MFTBL(dest)			mftb dest
#define MFTBU(dest)			mftbu dest
#else
#define MFTBL(dest)			mfspr dest, SPRN_TBRL
#define MFTBU(dest)			mfspr dest, SPRN_TBRU
#endif

#ifndef CONFIG_SMP
#define TLBSYNC
#else /* CONFIG_SMP */
/* tlbsync is not implemented on 601 */
#define TLBSYNC				\
BEGIN_FTR_SECTION			\
	tlbsync;			\
	sync;				\
END_FTR_SECTION_IFCLR(CPU_FTR_601)
#endif

#ifdef CONFIG_PPC64
#define MTOCRF(FXM, RS)			\
	BEGIN_FTR_SECTION_NESTED(848);	\
	mtcrf	(FXM), RS;		\
	FTR_SECTION_ELSE_NESTED(848);	\
	mtocrf (FXM), RS;		\
	ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_NOEXECUTE, 848)
#endif

/*
 * This instruction is not implemented on the PPC 603 or 601; however, on
 * the 403GCX and 405GP tlbia IS defined and tlbie is not.
 * All of these instructions exist in the 8xx, they have magical powers,
 * and they must be used.
 */

#if !defined(CONFIG_4xx) && !defined(CONFIG_PPC_8xx)
#define tlbia					\
	li	r4,1024;			\
	mtctr	r4;				\
	lis	r4,KERNELBASE@h;		\
	.machine push;				\
	.machine "power4";			\
0:	tlbie	r4;				\
	.machine pop;				\
	addi	r4,r4,0x1000;			\
	bdnz	0b
#endif


#ifdef CONFIG_IBM440EP_ERR42
#define PPC440EP_ERR42 isync
#else
#define PPC440EP_ERR42
#endif

/* The following stops all load and store data streams associated with stream
 * ID (ie. streams created explicitly).  The embedded and server mnemonics for
 * dcbt are different so this must only be used for server.
 */
#define DCBT_BOOK3S_STOP_ALL_STREAM_IDS(scratch)	\
       lis     scratch,0x60000000@h;			\
       dcbt    0,scratch,0b01010

/*
 * toreal/fromreal/tophys/tovirt macros. 32-bit BookE makes them
 * keep the address intact to be compatible with code shared with
 * 32-bit classic.
 *
 * On the other hand, I find it useful to have them behave as expected
 * by their name (ie always do the addition) on 64-bit BookE
 */
#if defined(CONFIG_BOOKE) && !defined(CONFIG_PPC64)
#define toreal(rd)
#define fromreal(rd)

/*
 * We use addis to ensure compatibility with the "classic" ppc versions of
 * these macros, which use rs = 0 to get the tophys offset in rd, rather than
 * converting the address in r0, and so this version has to do that too
 * (i.e. set register rd to 0 when rs == 0).
 */
#define tophys(rd,rs)				\
	addis	rd,rs,0

#define tovirt(rd,rs)				\
	addis	rd,rs,0

#elif defined(CONFIG_PPC64)
#define toreal(rd)		/* we can access c000... in real mode */
#define fromreal(rd)

#define tophys(rd,rs)                           \
	clrldi	rd,rs,2

#define tovirt(rd,rs)                           \
	rotldi	rd,rs,16;			\
	ori	rd,rd,((KERNELBASE>>48)&0xFFFF);\
	rotldi	rd,rd,48
#else
/*
 * On APUS (Amiga PowerPC cpu upgrade board), we don't know the
 * physical base address of RAM at compile time.
 */
#define toreal(rd)	tophys(rd,rd)
#define fromreal(rd)	tovirt(rd,rd)

#define tophys(rd,rs)				\
0:	addis	rd,rs,-PAGE_OFFSET@h;		\
	.section ".vtop_fixup","aw";		\
	.align  1;				\
	.long   0b;				\
	.previous

#define tovirt(rd,rs)				\
0:	addis	rd,rs,PAGE_OFFSET@h;		\
	.section ".ptov_fixup","aw";		\
	.align  1;				\
	.long   0b;				\
	.previous
#endif

#ifdef CONFIG_PPC_BOOK3S_64
#define RFI		rfid
#define MTMSRD(r)	mtmsrd	r
#define MTMSR_EERI(reg)	mtmsrd	reg,1
#else
#ifndef CONFIG_40x
#define	RFI		rfi
#else
#define RFI		rfi; b .	/* Prevent prefetch past rfi */
#endif
#define MTMSRD(r)	mtmsr	r
#define MTMSR_EERI(reg)	mtmsr	reg
#endif

#endif /* __KERNEL__ */

/* The boring bits... */

/* Condition Register Bit Fields */

#define	cr0	0
#define	cr1	1
#define	cr2	2
#define	cr3	3
#define	cr4	4
#define	cr5	5
#define	cr6	6
#define	cr7	7


/*
 * General Purpose Registers (GPRs)
 *
 * The lower case r0-r31 should be used in preference to the upper
 * case R0-R31 as they provide more error checking in the assembler.
 * Use R0-31 only when really nessesary.
 */

#define	r0	%r0
#define	r1	%r1
#define	r2	%r2
#define	r3	%r3
#define	r4	%r4
#define	r5	%r5
#define	r6	%r6
#define	r7	%r7
#define	r8	%r8
#define	r9	%r9
#define	r10	%r10
#define	r11	%r11
#define	r12	%r12
#define	r13	%r13
#define	r14	%r14
#define	r15	%r15
#define	r16	%r16
#define	r17	%r17
#define	r18	%r18
#define	r19	%r19
#define	r20	%r20
#define	r21	%r21
#define	r22	%r22
#define	r23	%r23
#define	r24	%r24
#define	r25	%r25
#define	r26	%r26
#define	r27	%r27
#define	r28	%r28
#define	r29	%r29
#define	r30	%r30
#define	r31	%r31


/* Floating Point Registers (FPRs) */

#define	fr0	0
#define	fr1	1
#define	fr2	2
#define	fr3	3
#define	fr4	4
#define	fr5	5
#define	fr6	6
#define	fr7	7
#define	fr8	8
#define	fr9	9
#define	fr10	10
#define	fr11	11
#define	fr12	12
#define	fr13	13
#define	fr14	14
#define	fr15	15
#define	fr16	16
#define	fr17	17
#define	fr18	18
#define	fr19	19
#define	fr20	20
#define	fr21	21
#define	fr22	22
#define	fr23	23
#define	fr24	24
#define	fr25	25
#define	fr26	26
#define	fr27	27
#define	fr28	28
#define	fr29	29
#define	fr30	30
#define	fr31	31

/* AltiVec Registers (VPRs) */

#define	v0	0
#define	v1	1
#define	v2	2
#define	v3	3
#define	v4	4
#define	v5	5
#define	v6	6
#define	v7	7
#define	v8	8
#define	v9	9
#define	v10	10
#define	v11	11
#define	v12	12
#define	v13	13
#define	v14	14
#define	v15	15
#define	v16	16
#define	v17	17
#define	v18	18
#define	v19	19
#define	v20	20
#define	v21	21
#define	v22	22
#define	v23	23
#define	v24	24
#define	v25	25
#define	v26	26
#define	v27	27
#define	v28	28
#define	v29	29
#define	v30	30
#define	v31	31

/* VSX Registers (VSRs) */

#define	vs0	0
#define	vs1	1
#define	vs2	2
#define	vs3	3
#define	vs4	4
#define	vs5	5
#define	vs6	6
#define	vs7	7
#define	vs8	8
#define	vs9	9
#define	vs10	10
#define	vs11	11
#define	vs12	12
#define	vs13	13
#define	vs14	14
#define	vs15	15
#define	vs16	16
#define	vs17	17
#define	vs18	18
#define	vs19	19
#define	vs20	20
#define	vs21	21
#define	vs22	22
#define	vs23	23
#define	vs24	24
#define	vs25	25
#define	vs26	26
#define	vs27	27
#define	vs28	28
#define	vs29	29
#define	vs30	30
#define	vs31	31
#define	vs32	32
#define	vs33	33
#define	vs34	34
#define	vs35	35
#define	vs36	36
#define	vs37	37
#define	vs38	38
#define	vs39	39
#define	vs40	40
#define	vs41	41
#define	vs42	42
#define	vs43	43
#define	vs44	44
#define	vs45	45
#define	vs46	46
#define	vs47	47
#define	vs48	48
#define	vs49	49
#define	vs50	50
#define	vs51	51
#define	vs52	52
#define	vs53	53
#define	vs54	54
#define	vs55	55
#define	vs56	56
#define	vs57	57
#define	vs58	58
#define	vs59	59
#define	vs60	60
#define	vs61	61
#define	vs62	62
#define	vs63	63

/* SPE Registers (EVPRs) */

#define	evr0	0
#define	evr1	1
#define	evr2	2
#define	evr3	3
#define	evr4	4
#define	evr5	5
#define	evr6	6
#define	evr7	7
#define	evr8	8
#define	evr9	9
#define	evr10	10
#define	evr11	11
#define	evr12	12
#define	evr13	13
#define	evr14	14
#define	evr15	15
#define	evr16	16
#define	evr17	17
#define	evr18	18
#define	evr19	19
#define	evr20	20
#define	evr21	21
#define	evr22	22
#define	evr23	23
#define	evr24	24
#define	evr25	25
#define	evr26	26
#define	evr27	27
#define	evr28	28
#define	evr29	29
#define	evr30	30
#define	evr31	31

/* some stab codes */
#define N_FUN	36
#define N_RSYM	64
#define N_SLINE	68
#define N_SO	100

/*
 * Create an endian fixup trampoline
 *
 * This starts with a "tdi 0,0,0x48" instruction which is
 * essentially a "trap never", and thus akin to a nop.
 *
 * The opcode for this instruction read with the wrong endian
 * however results in a b . + 8
 *
 * So essentially we use that trick to execute the following
 * trampoline in "reverse endian" if we are running with the
 * MSR_LE bit set the "wrong" way for whatever endianness the
 * kernel is built for.
 */

#ifdef CONFIG_PPC_BOOK3E
#define FIXUP_ENDIAN
#else
/*
 * This version may be used in in HV or non-HV context.
 * MSR[EE] must be disabled.
 */
#define FIXUP_ENDIAN						   \
	tdi   0,0,0x48;	  /* Reverse endian of b . + 8		*/ \
	b     191f;	  /* Skip trampoline if endian is good	*/ \
	.long 0xa600607d; /* mfmsr r11				*/ \
	.long 0x01006b69; /* xori r11,r11,1			*/ \
	.long 0x00004039; /* li r10,0				*/ \
	.long 0x6401417d; /* mtmsrd r10,1			*/ \
	.long 0x05009f42; /* bcl 20,31,$+4			*/ \
	.long 0xa602487d; /* mflr r10				*/ \
	.long 0x14004a39; /* addi r10,r10,20			*/ \
	.long 0xa6035a7d; /* mtsrr0 r10				*/ \
	.long 0xa6037b7d; /* mtsrr1 r11				*/ \
	.long 0x2400004c; /* rfid				*/ \
191:

/*
 * This version that may only be used with MSR[HV]=1
 * - Does not clear MSR[RI], so more robust.
 * - Slightly smaller and faster.
 */
#define FIXUP_ENDIAN_HV						   \
	tdi   0,0,0x48;	  /* Reverse endian of b . + 8		*/ \
	b     191f;	  /* Skip trampoline if endian is good	*/ \
	.long 0xa600607d; /* mfmsr r11				*/ \
	.long 0x01006b69; /* xori r11,r11,1			*/ \
	.long 0x05009f42; /* bcl 20,31,$+4			*/ \
	.long 0xa602487d; /* mflr r10				*/ \
	.long 0x14004a39; /* addi r10,r10,20			*/ \
	.long 0xa64b5a7d; /* mthsrr0 r10			*/ \
	.long 0xa64b7b7d; /* mthsrr1 r11			*/ \
	.long 0x2402004c; /* hrfid				*/ \
191:

#endif /* !CONFIG_PPC_BOOK3E */

#endif /*  __ASSEMBLY__ */

/*
 * Helper macro for exception table entries
 */
#define EX_TABLE(_fault, _target)		\
	stringify_in_c(.section __ex_table,"a";)\
	stringify_in_c(.balign 4;)		\
	stringify_in_c(.long (_fault) - . ;)	\
	stringify_in_c(.long (_target) - . ;)	\
	stringify_in_c(.previous)

#endif /* _ASM_POWERPC_PPC_ASM_H */