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hc
2024-01-05 071106ecf68c401173c58808b1cf5f68cc50d390 
 kernel/arch/sparc/lib/checksum_32.S
....@@ -144,44 +144,21 @@
144144 cpout:	retl						! get outta here
145145 	 mov	%o2, %o0				! return computed csum
146146 
147
-	.globl __csum_partial_copy_start, __csum_partial_copy_end
148
-__csum_partial_copy_start:
149
-
150147 /* Work around cpp -rob */
151148 #define ALLOC #alloc
152149 #define EXECINSTR #execinstr
153
-#define EX(x,y,a,b)				\
154
-98:     x,y;                                    \
155
-        .section .fixup,ALLOC,EXECINSTR;	\
156
-        .align  4;                              \
157
-99:     ba 30f;                                 \
158
-         a, b, %o3;                             \
159
-        .section __ex_table,ALLOC;		\
160
-        .align  4;                              \
161
-        .word   98b, 99b;                       \
162
-        .text;                                  \
163
-        .align  4
164
-
165
-#define EX2(x,y)				\
150
+#define EX(x,y)					\
166151 98:     x,y;                                    \
167152         .section __ex_table,ALLOC;		\
168153         .align  4;                              \
169
-        .word   98b, 30f;                       \
154
+        .word   98b, cc_fault;                   \
170155         .text;                                  \
171156         .align  4
172157 
173
-#define EX3(x,y)				\
174
-98:     x,y;                                    \
158
+#define EXT(start,end)				\
175159         .section __ex_table,ALLOC;		\
176160         .align  4;                              \
177
-        .word   98b, 96f;                       \
178
-        .text;                                  \
179
-        .align  4
180
-
181
-#define EXT(start,end,handler)			\
182
-        .section __ex_table,ALLOC;		\
183
-        .align  4;                              \
184
-        .word   start, 0, end, handler;         \
161
+        .word   start, 0, end, cc_fault;         \
185162         .text;                                  \
186163         .align  4
187164 
....@@ -252,21 +229,21 @@
252229 cc_end_cruft:
253230 	be	1f
254231 	 andcc	%o3, 4, %g0
255
-	EX(ldd	[%o0 + 0x00], %g2, and %o3, 0xf)
232
+	EX(ldd	[%o0 + 0x00], %g2)
256233 	add	%o1, 8, %o1
257234 	addcc	%g2, %g7, %g7
258235 	add	%o0, 8, %o0
259236 	addxcc	%g3, %g7, %g7
260
-	EX2(st	%g2, [%o1 - 0x08])
237
+	EX(st	%g2, [%o1 - 0x08])
261238 	addx	%g0, %g7, %g7
262239 	andcc	%o3, 4, %g0
263
-	EX2(st	%g3, [%o1 - 0x04])
240
+	EX(st	%g3, [%o1 - 0x04])
264241 1:	be	1f
265242 	 andcc	%o3, 3, %o3
266
-	EX(ld	[%o0 + 0x00], %g2, add %o3, 4)
243
+	EX(ld	[%o0 + 0x00], %g2)
267244 	add	%o1, 4, %o1
268245 	addcc	%g2, %g7, %g7
269
-	EX2(st	%g2, [%o1 - 0x04])
246
+	EX(st	%g2, [%o1 - 0x04])
270247 	addx	%g0, %g7, %g7
271248 	andcc	%o3, 3, %g0
272249 	add	%o0, 4, %o0
....@@ -276,14 +253,14 @@
276253 	 subcc	%o3, 2, %o3
277254 	b	4f
278255 	 or	%g0, %g0, %o4
279
-2:	EX(lduh	[%o0 + 0x00], %o4, add %o3, 2)
256
+2:	EX(lduh	[%o0 + 0x00], %o4)
280257 	add	%o0, 2, %o0
281
-	EX2(sth	%o4, [%o1 + 0x00])
258
+	EX(sth	%o4, [%o1 + 0x00])
282259 	be	6f
283260 	 add	%o1, 2, %o1
284261 	sll	%o4, 16, %o4
285
-4:	EX(ldub	[%o0 + 0x00], %o5, add %g0, 1)
286
-	EX2(stb	%o5, [%o1 + 0x00])
262
+4:	EX(ldub	[%o0 + 0x00], %o5)
263
+	EX(stb	%o5, [%o1 + 0x00])
287264 	sll	%o5, 8, %o5
288265 	or	%o5, %o4, %o4
289266 6:	addcc	%o4, %g7, %g7
....@@ -306,9 +283,9 @@
306283 	 andcc	%o0, 0x2, %g0
307284 	be	1f
308285 	 andcc	%o0, 0x4, %g0
309
-	EX(lduh	[%o0 + 0x00], %g4, add %g1, 0)
286
+	EX(lduh	[%o0 + 0x00], %g4)
310287 	sub	%g1, 2, %g1
311
-	EX2(sth	%g4, [%o1 + 0x00])
288
+	EX(sth	%g4, [%o1 + 0x00])
312289 	add	%o0, 2, %o0
313290 	sll	%g4, 16, %g4
314291 	addcc	%g4, %g7, %g7
....@@ -322,9 +299,9 @@
322299 	or	%g3, %g7, %g7
323300 1:	be	3f
324301 	 andcc	%g1, 0xffffff80, %g0
325
-	EX(ld	[%o0 + 0x00], %g4, add %g1, 0)
302
+	EX(ld	[%o0 + 0x00], %g4)
326303 	sub	%g1, 4, %g1
327
-	EX2(st	%g4, [%o1 + 0x00])
304
+	EX(st	%g4, [%o1 + 0x00])
328305 	add	%o0, 4, %o0
329306 	addcc	%g4, %g7, %g7
330307 	add	%o1, 4, %o1
....@@ -354,7 +331,7 @@
354331 	CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x20,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
355332 	CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x40,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
356333 	CSUMCOPY_BIGCHUNK(%o0,%o1,%g7,0x60,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
357
-10:	EXT(5b, 10b, 20f)		! note for exception handling
334
+10:	EXT(5b, 10b)			! note for exception handling
358335 	sub	%g1, 128, %g1		! detract from length
359336 	addx	%g0, %g7, %g7		! add in last carry bit
360337 	andcc	%g1, 0xffffff80, %g0	! more to csum?
....@@ -379,7 +356,7 @@
379356 	CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x28,%g2,%g3,%g4,%g5)
380357 	CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x18,%g2,%g3,%g4,%g5)
381358 	CSUMCOPY_LASTCHUNK(%o0,%o1,%g7,0x08,%g2,%g3,%g4,%g5)
382
-12:	EXT(cctbl, 12b, 22f)		! note for exception table handling
359
+12:	EXT(cctbl, 12b)			! note for exception table handling
383360 	addx	%g0, %g7, %g7
384361 	andcc	%o3, 0xf, %g0		! check for low bits set
385362 ccte:	bne	cc_end_cruft		! something left, handle it out of band
....@@ -390,7 +367,7 @@
390367 	CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x20,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
391368 	CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x40,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
392369 	CSUMCOPY_BIGCHUNK_ALIGNED(%o0,%o1,%g7,0x60,%o4,%o5,%g2,%g3,%g4,%g5,%o2,%o3)
393
-11:	EXT(ccdbl, 11b, 21f)		! note for exception table handling
370
+11:	EXT(ccdbl, 11b)			! note for exception table handling
394371 	sub	%g1, 128, %g1		! detract from length
395372 	addx	%g0, %g7, %g7		! add in last carry bit
396373 	andcc	%g1, 0xffffff80, %g0	! more to csum?
....@@ -407,9 +384,9 @@
407384 	be,a	1f
408385 	 srl	%g1, 1, %g4		
409386 	sub	%g1, 1, %g1	
410
-	EX(ldub	[%o0], %g5, add %g1, 1)
387
+	EX(ldub	[%o0], %g5)
411388 	add	%o0, 1, %o0	
412
-	EX2(stb	%g5, [%o1])
389
+	EX(stb	%g5, [%o1])
413390 	srl	%g1, 1, %g4
414391 	add	%o1, 1, %o1
415392 1:	cmp	%g4, 0		
....@@ -418,34 +395,34 @@
418395 	andcc	%o0, 2, %g0	
419396 	be,a	1f
420397 	 srl	%g4, 1, %g4
421
-	EX(lduh	[%o0], %o4, add %g1, 0)
398
+	EX(lduh	[%o0], %o4)
422399 	sub	%g1, 2, %g1	
423400 	srl	%o4, 8, %g2
424401 	sub	%g4, 1, %g4	
425
-	EX2(stb	%g2, [%o1])
402
+	EX(stb	%g2, [%o1])
426403 	add	%o4, %g5, %g5
427
-	EX2(stb	%o4, [%o1 + 1])
404
+	EX(stb	%o4, [%o1 + 1])
428405 	add	%o0, 2, %o0	
429406 	srl	%g4, 1, %g4
430407 	add	%o1, 2, %o1
431408 1:	cmp	%g4, 0		
432409 	be,a	2f
433410 	 andcc	%g1, 2, %g0
434
-	EX3(ld	[%o0], %o4)
411
+	EX(ld	[%o0], %o4)
435412 5:	srl	%o4, 24, %g2
436413 	srl	%o4, 16, %g3
437
-	EX2(stb	%g2, [%o1])
414
+	EX(stb	%g2, [%o1])
438415 	srl	%o4, 8, %g2
439
-	EX2(stb	%g3, [%o1 + 1])
416
+	EX(stb	%g3, [%o1 + 1])
440417 	add	%o0, 4, %o0
441
-	EX2(stb	%g2, [%o1 + 2])
418
+	EX(stb	%g2, [%o1 + 2])
442419 	addcc	%o4, %g5, %g5
443
-	EX2(stb	%o4, [%o1 + 3])
420
+	EX(stb	%o4, [%o1 + 3])
444421 	addx	%g5, %g0, %g5	! I am now to lazy to optimize this (question it
445422 	add	%o1, 4, %o1	! is worthy). Maybe some day - with the sll/srl
446423 	subcc	%g4, 1, %g4	! tricks
447424 	bne,a	5b
448
-	 EX3(ld	[%o0], %o4)
425
+	 EX(ld	[%o0], %o4)
449426 	sll	%g5, 16, %g2
450427 	srl	%g5, 16, %g5
451428 	srl	%g2, 16, %g2
....@@ -453,19 +430,19 @@
453430 	add	%g2, %g5, %g5 
454431 2:	be,a	3f		
455432 	 andcc	%g1, 1, %g0
456
-	EX(lduh	[%o0], %o4, and %g1, 3)
433
+	EX(lduh	[%o0], %o4)
457434 	andcc	%g1, 1, %g0
458435 	srl	%o4, 8, %g2
459436 	add	%o0, 2, %o0	
460
-	EX2(stb	%g2, [%o1])
437
+	EX(stb	%g2, [%o1])
461438 	add	%g5, %o4, %g5
462
-	EX2(stb	%o4, [%o1 + 1])
439
+	EX(stb	%o4, [%o1 + 1])
463440 	add	%o1, 2, %o1
464441 3:	be,a	1f		
465442 	 sll	%g5, 16, %o4
466
-	EX(ldub	[%o0], %g2, add %g0, 1)
443
+	EX(ldub	[%o0], %g2)
467444 	sll	%g2, 8, %o4	
468
-	EX2(stb	%g2, [%o1])
445
+	EX(stb	%g2, [%o1])
469446 	add	%g5, %o4, %g5
470447 	sll	%g5, 16, %o4
471448 1:	addcc	%o4, %g5, %g5
....@@ -481,113 +458,10 @@
481458 4:	addcc	%g7, %g5, %g7
482459 	retl	
483460 	 addx	%g0, %g7, %o0
484
-__csum_partial_copy_end:
485461 
486462 /* We do these strange calculations for the csum_*_from_user case only, ie.
487463  * we only bother with faults on loads... */
488464 
489
-/* o2 = ((g2%20)&3)*8
490
- * o3 = g1 - (g2/20)*32 - o2 */
491
-20:
492
-	cmp	%g2, 20
493
-	blu,a	1f
494
-	 and	%g2, 3, %o2
495
-	sub	%g1, 32, %g1
496
-	b	20b
497
-	 sub	%g2, 20, %g2
498
-1:
499
-	sll	%o2, 3, %o2
500
-	b	31f
501
-	 sub	%g1, %o2, %o3
502
-
503
-/* o2 = (!(g2 & 15) ? 0 : (((g2 & 15) + 1) & ~1)*8)
504
- * o3 = g1 - (g2/16)*32 - o2 */
505
-21:
506
-	andcc	%g2, 15, %o3
507
-	srl	%g2, 4, %g2
508
-	be,a	1f
509
-	 clr	%o2
510
-	add	%o3, 1, %o3
511
-	and	%o3, 14, %o3
512
-	sll	%o3, 3, %o2
513
-1:
514
-	sll	%g2, 5, %g2
515
-	sub	%g1, %g2, %o3
516
-	b	31f
517
-	 sub	%o3, %o2, %o3
518
-
519
-/* o0 += (g2/10)*16 - 0x70
520
- * 01 += (g2/10)*16 - 0x70
521
- * o2 = (g2 % 10) ? 8 : 0
522
- * o3 += 0x70 - (g2/10)*16 - o2 */
523
-22:
524
-	cmp	%g2, 10
525
-	blu,a	1f
526
-	 sub	%o0, 0x70, %o0
527
-	add	%o0, 16, %o0
528
-	add	%o1, 16, %o1
529
-	sub	%o3, 16, %o3
530
-	b	22b
531
-	 sub	%g2, 10, %g2
532
-1:
533
-	sub	%o1, 0x70, %o1
534
-	add	%o3, 0x70, %o3
535
-	clr	%o2
536
-	tst	%g2
537
-	bne,a	1f
538
-	 mov	8, %o2
539
-1:
540
-	b	31f
541
-	 sub	%o3, %o2, %o3
542
-96:
543
-	and	%g1, 3, %g1
544
-	sll	%g4, 2, %g4
545
-	add	%g1, %g4, %o3
546
-30:
547
-/* %o1 is dst
548
- * %o3 is # bytes to zero out
549
- * %o4 is faulting address
550
- * %o5 is %pc where fault occurred */
551
-	clr	%o2
552
-31:
553
-/* %o0 is src
554
- * %o1 is dst
555
- * %o2 is # of bytes to copy from src to dst
556
- * %o3 is # bytes to zero out
557
- * %o4 is faulting address
558
- * %o5 is %pc where fault occurred */
559
-	save	%sp, -104, %sp
560
-        mov     %i5, %o0
561
-        mov     %i7, %o1
562
-        mov	%i4, %o2
563
-        call    lookup_fault
564
-	 mov	%g7, %i4
565
-	cmp	%o0, 2
566
-	bne	1f	
567
-	 add	%g0, -EFAULT, %i5
568
-	tst	%i2
569
-	be	2f
570
-	 mov	%i0, %o1
571
-	mov	%i1, %o0
572
-5:
573
-	call	memcpy
574
-	 mov	%i2, %o2
575
-	tst	%o0
576
-	bne,a	2f
577
-	 add	%i3, %i2, %i3
578
-	add	%i1, %i2, %i1
579
-2:
580
-	mov	%i1, %o0
581
-6:
582
-	call	__bzero
583
-	 mov	%i3, %o1
584
-1:
585
-	ld	[%sp + 168], %o2		! struct_ptr of parent
586
-	st	%i5, [%o2]
465
+cc_fault:
587466 	ret
588
-	 restore
589
-
590
-        .section __ex_table,#alloc
591
-        .align 4
592
-        .word 5b,2
593
-	.word 6b,2
467
+	 clr	%o0