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
|
/* $Id: entry.S,v 1.71 2000/03/22 13:29:33 gniibe Exp $
*
* linux/arch/sh/entry.S
*
* Copyright (C) 1999, 2000 Niibe Yutaka
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
*/
#include <linux/sys.h>
#include <linux/linkage.h>
#include <linux/config.h>
#define COMPAT_OLD_SYSCALL_ABI 1
! NOTE:
! GNU as (as of 2.9.1) changes bf/s into bt/s and bra, when the address
! to be jumped is too far, but it causes illegal slot exception.
/*
* entry.S contains the system-call and fault low-level handling routines.
* This also contains the timer-interrupt handler, as well as all interrupts
* and faults that can result in a task-switch.
*
* NOTE: This code handles signal-recognition, which happens every time
* after a timer-interrupt and after each system call.
*
* Stack layout in 'ret_from_syscall':
* ptrace needs to have all regs on the stack.
* if the order here is changed, it needs to be
* updated in ptrace.c and ptrace.h
*
* $r0
* ...
* $r15 = stack pointer
* $spc
* $pr
* $ssr
* $gbr
* $mach
* $macl
* syscall #
*
*/
/*
* These are offsets into the task-struct.
*/
flags = 4
sigpending = 8
need_resched = 20
tsk_ptrace = 60
PT_TRACESYS = 0x00000002
PF_USEDFPU = 0x00100000
ENOSYS = 38
#if defined(__sh3__)
TRA = 0xffffffd0
EXPEVT = 0xffffffd4
#ifdef CONFIG_CPU_SUBTYPE_SH7709
INTEVT = 0xa4000000 ! INTEVTE2(0xa4000000)
#else
INTEVT = 0xffffffd8
#endif
MMU_TEA = 0xfffffffc ! TLB Exception Address Register
#elif defined(__SH4__)
TRA = 0xff000020
EXPEVT = 0xff000024
INTEVT = 0xff000028
MMU_TEA = 0xff00000c ! TLB Exception Address Register
#endif
/* Offsets to the stack */
R0 = 0 /* Return value */
SP = (15*4)
SR = (16*4+8)
SYSCALL_NR = (16*4+6*4)
#define k0 r0
#define k1 r1
#define k2 r2
#define k3 r3
#define k4 r4
#define current r7 /* r7_bank1 */
#define g_imask r6 /* r6_bank1 */
#define k_current r7_bank /* r7_bank1 */
#define k_g_imask r6_bank /* r6_bank1 */
#define k_ex_code r2_bank /* r2_bank1 */
/*
* Kernel mode register usage:
* k0 scratch
* k1 scratch
* k2 scratch (Exception code)
* k3 scratch (Return address)
* k4 scratch
* k5 reserved
* k6 Global Interrupt Mask (0--15 << 4)
* k7 CURRENT (pointer to current task)
*/
!
! TLB Miss / Initial Page write exception handling
! _and_
! TLB hits, but the access violate the protection.
! It can be valid access, such as stack grow and/or C-O-W.
!
!
! Find the pmd/pte entry and loadtlb
! If it's not found, cause address error (SEGV)
!
! Although this could be written in assembly language (and it'd be faster),
! this first version depends *much* on C implementation.
!
#define STI() \
mov.l __INV_IMASK, $r11; \
stc $sr, $r10; \
and $r11, $r10; \
stc $k_g_imask, $r11; \
or $r11, $r10; \
ldc $r10, $sr
.align 2
tlb_miss_load:
mov.l 2f, $r0
mov.l @$r0, $r6
STI()
mov $r15, $r4
mov.l 1f, $r0
jmp @$r0
mov #0, $r5
.align 2
tlb_miss_store:
mov.l 2f, $r0
mov.l @$r0, $r6
STI()
mov $r15, $r4
mov.l 1f, $r0
jmp @$r0
mov #1, $r5
.align 2
initial_page_write:
mov.l 2f, $r0
mov.l @$r0, $r6
STI()
mov $r15, $r4
mov.l 1f, $r0
jmp @$r0
mov #1, $r5
.align 2
tlb_protection_violation_load:
mov.l 2f, $r0
mov.l @$r0, $r6
STI()
mov $r15, $r4
mov.l 1f, $r0
jmp @$r0
mov #0, $r5
.align 2
tlb_protection_violation_store:
mov.l 2f, $r0
mov.l @$r0, $r6
STI()
mov $r15, $r4
mov.l 1f, $r0
jmp @$r0
mov #1, $r5
.align 2
1: .long SYMBOL_NAME(do_page_fault)
2: .long MMU_TEA
#ifdef CONFIG_DEBUG_KERNEL_WITH_GDB_STUB
.align 2
/* Unwind the stack and jmp to the debug entry */
debug_kernel:
mov.l @$r15+, $r0
mov.l @$r15+, $r1
mov.l @$r15+, $r2
mov.l @$r15+, $r3
mov.l @$r15+, $r4
mov.l @$r15+, $r5
mov.l @$r15+, $r6
mov.l @$r15+, $r7
stc $sr, $r8
mov.l 1f, $r9 ! BL =1, RB=1, IMASK=0x0F
or $r9, $r8
ldc $r8, $sr ! here, change the register bank
mov.l @$r15+, $r8
mov.l @$r15+, $r9
mov.l @$r15+, $r10
mov.l @$r15+, $r11
mov.l @$r15+, $r12
mov.l @$r15+, $r13
mov.l @$r15+, $r14
mov.l @$r15+, $k0
ldc.l @$r15+, $spc
lds.l @$r15+, $pr
mov.l @$r15+, $k1
ldc.l @$r15+, $gbr
lds.l @$r15+, $mach
lds.l @$r15+, $macl
mov $k0, $r15
!
mov.l 2f, $k0
jmp @$k0
ldc $k1, $ssr
.align 2
1: .long 0x300000f0
2: .long 0xa0000100
#endif
.align 2
debug_trap:
#ifdef CONFIG_DEBUG_KERNEL_WITH_GDB_STUB
mov #SR, $r0
mov.l @($r0,$r15), $r0 ! get status register
shll $r0
shll $r0 ! kernel space?
bt/s debug_kernel
#endif
mov.l @$r15, $r0
mov.l 1f, $r8
jmp @$r8
nop
.align 2
1: .long SYMBOL_NAME(break_point_trap_software)
.align 2
error:
!
STI()
mov.l 1f, $r0
jmp @$r0
nop
.align 2
1: .long SYMBOL_NAME(do_exception_error)
badsys: mov #-ENOSYS, $r0
rts ! go to ret_from_syscall..
mov.l $r0, @(R0,$r15)
!
!
!
ENTRY(ret_from_fork)
bra SYMBOL_NAME(ret_from_syscall)
add #4, $r15 ! pop down bogus r0 (see switch_to MACRO)
/*
* Old syscall interface:
*
* Syscall #: R0
* Arguments #0 to #3: R4--R7
* more arguments: On the stack
* TRA: (number of arguments on the stack) x 4
*
* New syscall interface:
*
* Syscall #: R3
* Arguments #0 to #3: R4--R7
* Arguments #4 to #6: R0, R1, R2
* TRA: (number of arguments + 0x10) x 4
*
*/
system_call:
mov.l 1f, $r9
mov.l @$r9, $r8
!
mov #0x20, $r9
extu.b $r9, $r9
shll2 $r9
cmp/hs $r9, $r8
bt debug_trap
!
mov #SYSCALL_NR, $r14
add $r15, $r14
!
mov #0x40, $r9
#ifdef COMPAT_OLD_SYSCALL_ABI
cmp/hs $r9, $r8
mov $r0, $r10
bf/s 0f
mov $r0, $r9
#endif
! New Syscall ABI
add #-0x40, $r8
shlr2 $r8
shll8 $r8
shll8 $r8
mov $r3, $r10
or $r8, $r10 ! Encode syscall # and # of arguments
!
mov $r3, $r9
mov #0, $r8
0:
mov.l $r10, @$r14 ! set syscall_nr
STI()
mov.l __n_sys, $r10
cmp/hs $r10, $r9
bt badsys
!
#ifdef COMPAT_OLD_SYSCALL_ABI
! Build the stack frame if TRA > 0
mov $r8, $r10
cmp/pl $r10
bf 0f
mov.l @(SP,$r15), $r0 ! get original stack
7: add #-4, $r10
4: mov.l @($r0,$r10), $r1 ! May cause address error exception..
mov.l $r1, @-$r15
cmp/pl $r10
bt 7b
#endif
0: stc $k_current, $r11
mov.l @(tsk_ptrace,$r11), $r10 ! Is it trace?
mov #PT_TRACESYS, $r11
tst $r11, $r10
bt 5f
! Trace system call
mov #-ENOSYS, $r11
mov.l $r11, @(R0,$r15)
! Push up $R0--$R2, and $R4--$R7
mov.l $r0, @-$r15
mov.l $r1, @-$r15
mov.l $r2, @-$r15
mov.l $r4, @-$r15
mov.l $r5, @-$r15
mov.l $r6, @-$r15
mov.l $r7, @-$r15
!
mov.l 2f, $r11
jsr @$r11
nop
! Pop down $R0--$R2, and $R4--$R7
mov.l @$r15+, $r7
mov.l @$r15+, $r6
mov.l @$r15+, $r5
mov.l @$r15+, $r4
mov.l @$r15+, $r2
mov.l @$r15+, $r1
mov.l @$r15+, $r0
!
mov.l __syscall_ret_trace, $r10
bra 6f
lds $r10, $pr
!
5: mov.l __syscall_ret, $r10
lds $r10, $pr
!
6: mov $r9, $r10
shll2 $r10 ! x4
mov.l __sct, $r11
add $r11, $r10
mov.l @$r10, $r11
jmp @$r11
nop
! In case of trace
.align 2
3:
#ifdef COMPAT_OLD_SYSCALL_ABI
add $r8, $r15 ! pop off the arguments
#endif
mov.l $r0, @(R0,$r15) ! save the return value
mov.l 2f, $r1
mova SYMBOL_NAME(ret_from_syscall), $r0
jmp @$r1
lds $r0, $pr
.align 2
1: .long TRA
2: .long SYMBOL_NAME(syscall_trace)
__n_sys: .long NR_syscalls
__sct: .long SYMBOL_NAME(sys_call_table)
__syscall_ret_trace:
.long 3b
__syscall_ret:
.long SYMBOL_NAME(syscall_ret)
#ifdef COMPAT_OLD_SYSCALL_ABI
.section .fixup,"ax"
fixup_syscall_argerr:
rts
mov.l 1f, $r0
1: .long -22 ! -EINVAL
.previous
.section __ex_table, "a"
.align 2
.long 4b,fixup_syscall_argerr
.previous
#endif
.align 2
reschedule:
mova SYMBOL_NAME(ret_from_syscall), $r0
mov.l 1f, $r1
jmp @$r1
lds $r0, $pr
.align 2
1: .long SYMBOL_NAME(schedule)
ENTRY(ret_from_irq)
mov #SR, $r0
mov.l @($r0,$r15), $r0 ! get status register
shll $r0
shll $r0 ! kernel space?
bt restore_all ! Yes, it's from kernel, go back soon
!
STI()
bra ret_with_reschedule
nop
ENTRY(ret_from_exception)
mov #SR, $r0
mov.l @($r0,$r15), $r0 ! get status register
shll $r0
shll $r0 ! kernel space?
bt restore_all ! Yes, it's from kernel, go back soon
!
STI()
bra ret_from_syscall
nop
.align 2
__INV_IMASK:
.long 0xffffff0f ! ~(IMASK)
.align 2
syscall_ret:
#ifdef COMPAT_OLD_SYSCALL_ABI
add $r8, $r15 ! pop off the arguments
#endif
mov.l $r0, @(R0,$r15) ! save the return value
/* fall through */
ENTRY(ret_from_syscall)
mov.l __softirq_state, $r0
mov.l @$r0, $r1
mov.l @(4,$r0), $r2
tst $r2, $r1
bt ret_with_reschedule
handle_softirq:
mov.l __do_softirq, $r0
jsr @$r0
nop
ret_with_reschedule:
stc $k_current, $r1
mov.l @(need_resched,$r1), $r0
tst #0xff, $r0
bf reschedule
mov.l @(sigpending,$r1), $r0
tst #0xff, $r0
bt restore_all
signal_return:
mov $r15, $r4
mov #0, $r5
mov.l __do_signal, $r1
mova restore_all, $r0
jmp @$r1
lds $r0, $pr
.align 2
__do_signal:
.long SYMBOL_NAME(do_signal)
__softirq_state:
.long SYMBOL_NAME(softirq_state)
__do_softirq:
.long SYMBOL_NAME(do_softirq)
.align 2
restore_all:
#if defined(__SH4__)
mov.l __fpu_prepare_fd, $r0
jsr @$r0
stc $sr, $r4
#endif
!
mov.l @$r15+, $r0
mov.l @$r15+, $r1
mov.l @$r15+, $r2
mov.l @$r15+, $r3
mov.l @$r15+, $r4
mov.l @$r15+, $r5
mov.l @$r15+, $r6
mov.l @$r15+, $r7
!
stc $sr, $r8
mov.l __blrb_flags, $r9 ! BL =1, RB=1
or $r9, $r8
ldc $r8, $sr ! here, change the register bank
!
mov.l @$r15+, $r8
mov.l @$r15+, $r9
mov.l @$r15+, $r10
mov.l @$r15+, $r11
mov.l @$r15+, $r12
mov.l @$r15+, $r13
mov.l @$r15+, $r14
mov.l @$r15+, $k4 ! original stack pointer
ldc.l @$r15+, $spc
lds.l @$r15+, $pr
mov.l @$r15+, $k3 ! original SR
ldc.l @$r15+, $gbr
lds.l @$r15+, $mach
lds.l @$r15+, $macl
add #4, $r15 ! Skip syscall number
!
! Calculate new SR value
mov $k3, $k2 ! original SR value
mov.l 1f, $k1
stc $sr, $k0
and $k1, $k0 ! Get current FD-bit
mov.l 2f, $k1
and $k1, $k2 ! Mask orignal SR value
or $k0, $k2 ! Inherit current FD-bit
!
mov $k3, $k0 ! Calculate IMASK-bits
shlr2 $k0
and #0x3c, $k0
cmp/eq #0x3c, $k0
bf/s 7f
mov $g_imask, $k0
shll2 $k0
!
7: or $k0, $k2 ! Set the IMASK-bits
ldc $k2, $ssr
!
#if defined(__SH4__)
shll $k2
shll $k2
bf 9f ! user mode
/* Kernel to kernel transition */
mov.l 1f, $k1
tst $k1, $k3
bf 9f ! it hadn't FPU
! Kernel to kernel and FPU was used
! There's the case we don't get FPU now
stc $sr, $k2
tst $k1, $k2
bt 8f
! We need to grab FPU here
xor $k1, $k2
ldc $k2, $sr ! Grab FPU
mov.l __init_task_flags, $k1
mov.l @$k1, $k2
mov.l __PF_USEDFPU, $k0
or $k0, $k2
mov.l $k2, @$k1 ! Set init_task.flags |= PF_USEDFPU
!
! Restoring FPU...
!
8: mov.l 3f, $k1
lds $k1, $fpscr
fmov.s @$r15+, $fr0
fmov.s @$r15+, $fr1
fmov.s @$r15+, $fr2
fmov.s @$r15+, $fr3
fmov.s @$r15+, $fr4
fmov.s @$r15+, $fr5
fmov.s @$r15+, $fr6
fmov.s @$r15+, $fr7
fmov.s @$r15+, $fr8
fmov.s @$r15+, $fr9
fmov.s @$r15+, $fr10
fmov.s @$r15+, $fr11
fmov.s @$r15+, $fr12
fmov.s @$r15+, $fr13
fmov.s @$r15+, $fr14
fmov.s @$r15+, $fr15
lds.l @$r15+, $fpscr
lds.l @$r15+, $fpul
9:
#endif
mov $k4, $r15
rte
nop
.align 2
__blrb_flags: .long 0x30000000
#if defined(__SH4__)
__fpu_prepare_fd:
.long SYMBOL_NAME(fpu_prepare_fd)
__init_task_flags:
.long SYMBOL_NAME(init_task_union)+4
__PF_USEDFPU:
.long PF_USEDFPU
#endif
1: .long 0x00008000 ! FD
2: .long 0xffff7f0f ! ~(IMASK+FD)
3: .long 0x00080000 ! SZ=0, PR=1
! Exception Vector Base
!
! Should be aligned page boundary.
!
.balign 4096,0,4096
ENTRY(vbr_base)
.long 0
!
.balign 256,0,256
general_exception:
mov.l 1f, $k2
mov.l 2f, $k3
bra handle_exception
mov.l @$k2, $k2
.align 2
2: .long SYMBOL_NAME(ret_from_exception)
1: .long EXPEVT
!
!
.balign 1024,0,1024
tlb_miss:
mov.l 1f, $k2
mov.l 4f, $k3
bra handle_exception
mov.l @$k2, $k2
!
.balign 512,0,512
interrupt:
mov.l 2f, $k2
mov.l 3f, $k3
bra handle_exception
mov.l @$k2, $k2
.align 2
1: .long EXPEVT
2: .long INTEVT
3: .long SYMBOL_NAME(ret_from_irq)
4: .long SYMBOL_NAME(ret_from_exception)
!
!
handle_exception:
! Using k0, k1 for scratch registers (r0_bank1, r1_bank),
! save all registers onto stack.
!
stc $ssr, $k0 ! from kernel space?
shll $k0 ! Check MD bit (bit30)
shll $k0
#if defined(__SH4__)
bf/s 8f ! it's from user to kernel transition
mov $r15, $k0 ! save original stack to k0
/* Kernel to kernel transition */
mov.l 2f, $k1
stc $ssr, $k0
tst $k1, $k0
mov.l 4f, $k1
bf/s 9f ! FPU is not used
mov $r15, $k0 ! save original stack to k0
! FPU is used, save FPU
! /* XXX: Need to save another bank of FPU if all FPU feature is used */
! /* Currently it's not the case for GCC (only udivsi3_i4, divsi3_i4) */
sts.l $fpul, @-$r15
sts.l $fpscr, @-$r15
mov.l 6f, $k1
lds $k1, $fpscr
mov.l 3f, $k1
fmov.s $fr15, @-$r15
fmov.s $fr14, @-$r15
fmov.s $fr13, @-$r15
fmov.s $fr12, @-$r15
fmov.s $fr11, @-$r15
fmov.s $fr10, @-$r15
fmov.s $fr9, @-$r15
fmov.s $fr8, @-$r15
fmov.s $fr7, @-$r15
fmov.s $fr6, @-$r15
fmov.s $fr5, @-$r15
fmov.s $fr4, @-$r15
fmov.s $fr3, @-$r15
fmov.s $fr2, @-$r15
fmov.s $fr1, @-$r15
bra 9f
fmov.s $fr0, @-$r15
#else
mov.l 3f, $k1
bt/s 9f ! it's from kernel to kernel transition
mov $r15, $k0 ! save original stack to k0 anyway
#endif
8: /* User space to kernel */
mov #0x20, $k1
shll8 $k1 ! $k1 <= 8192
add $current, $k1
mov $k1, $r15 ! change to kernel stack
!
mov.l 4f, $k1 ! let kernel release FPU
9: mov #-1, $k4
mov.l $k4, @-$r15 ! syscall_nr (default: -1)
!
sts.l $macl, @-$r15
sts.l $mach, @-$r15
stc.l $gbr, @-$r15
stc.l $ssr, @-$r15
sts.l $pr, @-$r15
stc.l $spc, @-$r15
!
lds $k3, $pr ! Set the return address to pr
!
mov.l $k0, @-$r15 ! save orignal stack
mov.l $r14, @-$r15
mov.l $r13, @-$r15
mov.l $r12, @-$r15
mov.l $r11, @-$r15
mov.l $r10, @-$r15
mov.l $r9, @-$r15
mov.l $r8, @-$r15
!
stc $sr, $r8 ! Back to normal register bank, and
or $k1, $r8 ! Block all interrupts, may release FPU
mov.l 5f, $k1
and $k1, $r8 ! ...
ldc $r8, $sr ! ...changed here.
!
mov.l $r7, @-$r15
mov.l $r6, @-$r15
mov.l $r5, @-$r15
mov.l $r4, @-$r15
mov.l $r3, @-$r15
mov.l $r2, @-$r15
mov.l $r1, @-$r15
mov.l $r0, @-$r15
! Then, dispatch to the handler, according to the exception code.
stc $k_ex_code, $r8
shlr2 $r8
shlr $r8
mov.l 1f, $r9
add $r8, $r9
mov.l @$r9, $r9
jmp @$r9
nop
.align 2
1: .long SYMBOL_NAME(exception_handling_table)
2: .long 0x00008000 ! FD=1
3: .long 0x000000f0 ! FD=0, IMASK=15
4: .long 0x000080f0 ! FD=1, IMASK=15
5: .long 0xcfffffff ! RB=0, BL=0
6: .long 0x00080000 ! SZ=0, PR=1
none:
rts
nop
.data
ENTRY(exception_handling_table)
.long error
.long error
.long tlb_miss_load
.long tlb_miss_store
.long initial_page_write
.long tlb_protection_violation_load
.long tlb_protection_violation_store
.long error ! address_error_load (filled by trap_init)
.long error ! address_error_store (filled by trap_init)
#if defined(__SH4__)
.long SYMBOL_NAME(do_fpu_error)
#else
.long error ! fpu_exception
#endif
.long error
.long system_call ! Unconditional Trap
.long error ! reserved_instruction (filled by trap_init)
.long error ! illegal_slot_instruction (filled by trap_init)
ENTRY(nmi_slot)
.long none ! Not implemented yet
ENTRY(user_break_point_trap)
.long break_point_trap
ENTRY(interrupt_table)
! external hardware
.long SYMBOL_NAME(do_IRQ) ! 0000
.long SYMBOL_NAME(do_IRQ) ! 0001
.long SYMBOL_NAME(do_IRQ) ! 0010
.long SYMBOL_NAME(do_IRQ) ! 0011
.long SYMBOL_NAME(do_IRQ) ! 0100
.long SYMBOL_NAME(do_IRQ) ! 0101
.long SYMBOL_NAME(do_IRQ) ! 0110
.long SYMBOL_NAME(do_IRQ) ! 0111
.long SYMBOL_NAME(do_IRQ) ! 1000
.long SYMBOL_NAME(do_IRQ) ! 1001
.long SYMBOL_NAME(do_IRQ) ! 1010
.long SYMBOL_NAME(do_IRQ) ! 1011
.long SYMBOL_NAME(do_IRQ) ! 1100
.long SYMBOL_NAME(do_IRQ) ! 1101
.long SYMBOL_NAME(do_IRQ) ! 1110
.long error
! Internal hardware
.long SYMBOL_NAME(do_IRQ) ! TMU0 tuni0
.long SYMBOL_NAME(do_IRQ) ! TMU1 tuni1
.long SYMBOL_NAME(do_IRQ) ! TMU2 tuni2
.long SYMBOL_NAME(do_IRQ) ! ticpi2
.long SYMBOL_NAME(do_IRQ) ! RTC ati
.long SYMBOL_NAME(do_IRQ) ! pri
.long SYMBOL_NAME(do_IRQ) ! cui
.long SYMBOL_NAME(do_IRQ) ! SCI eri
.long SYMBOL_NAME(do_IRQ) ! rxi
.long SYMBOL_NAME(do_IRQ) ! txi
.long SYMBOL_NAME(do_IRQ) ! tei
.long SYMBOL_NAME(do_IRQ) ! WDT iti
.long SYMBOL_NAME(do_IRQ) ! REF rcmi
.long SYMBOL_NAME(do_IRQ) ! rovi
.long SYMBOL_NAME(do_IRQ)
.long SYMBOL_NAME(do_IRQ)
#if defined(CONFIG_CPU_SUBTYPE_SH7709)
.long SYMBOL_NAME(do_IRQ) ! 32 IRQ irq0
.long SYMBOL_NAME(do_IRQ) ! 33 irq1
.long SYMBOL_NAME(do_IRQ) ! 34 irq2
.long SYMBOL_NAME(do_IRQ) ! 35 irq3
.long SYMBOL_NAME(do_IRQ) ! 36 irq4
.long SYMBOL_NAME(do_IRQ) ! 37 irq5
.long SYMBOL_NAME(do_IRQ) ! 38
.long SYMBOL_NAME(do_IRQ) ! 39
.long SYMBOL_NAME(do_IRQ) ! 40 PINT pint0-7
.long SYMBOL_NAME(do_IRQ) ! 41 pint8-15
.long SYMBOL_NAME(do_IRQ) ! 42
.long SYMBOL_NAME(do_IRQ) ! 43
.long SYMBOL_NAME(do_IRQ) ! 44
.long SYMBOL_NAME(do_IRQ) ! 45
.long SYMBOL_NAME(do_IRQ) ! 46
.long SYMBOL_NAME(do_IRQ) ! 47
.long SYMBOL_NAME(do_IRQ) ! 48 DMAC dei0
.long SYMBOL_NAME(do_IRQ) ! 49 dei1
.long SYMBOL_NAME(do_IRQ) ! 50 dei2
.long SYMBOL_NAME(do_IRQ) ! 51 dei3
.long SYMBOL_NAME(do_IRQ) ! 52 IrDA eri1
.long SYMBOL_NAME(do_IRQ) ! 53 rxi1
.long SYMBOL_NAME(do_IRQ) ! 54 bri1
.long SYMBOL_NAME(do_IRQ) ! 55 txi1
.long SYMBOL_NAME(do_IRQ) ! 56 SCIF eri2
.long SYMBOL_NAME(do_IRQ) ! 57 rxi2
.long SYMBOL_NAME(do_IRQ) ! 58 bri2
.long SYMBOL_NAME(do_IRQ) ! 59 txi2
.long SYMBOL_NAME(do_IRQ) ! 60 ADC adi
#elif defined(__SH4__)
.long SYMBOL_NAME(do_IRQ) ! Hitachi UDI
.long SYMBOL_NAME(do_IRQ) ! GPIO
.long SYMBOL_NAME(do_IRQ) ! DMAC dmte0
.long SYMBOL_NAME(do_IRQ) ! dmte1
.long SYMBOL_NAME(do_IRQ) ! dmte2
.long SYMBOL_NAME(do_IRQ) ! dmte3
.long SYMBOL_NAME(do_IRQ) ! dmae
.long SYMBOL_NAME(do_IRQ)
.long SYMBOL_NAME(do_IRQ) ! SCIF eri
.long SYMBOL_NAME(do_IRQ) ! rxi
.long SYMBOL_NAME(do_IRQ) ! bri
.long SYMBOL_NAME(do_IRQ) ! txi
.long error
.long error
.long error
.long error
.long SYMBOL_NAME(do_fpu_state_restore)
.long SYMBOL_NAME(do_fpu_state_restore)
#endif
ENTRY(sys_call_table)
.long SYMBOL_NAME(sys_ni_syscall) /* 0 - old "setup()" system call*/
.long SYMBOL_NAME(sys_exit)
.long SYMBOL_NAME(sys_fork)
.long SYMBOL_NAME(sys_read)
.long SYMBOL_NAME(sys_write)
.long SYMBOL_NAME(sys_open) /* 5 */
.long SYMBOL_NAME(sys_close)
.long SYMBOL_NAME(sys_waitpid)
.long SYMBOL_NAME(sys_creat)
.long SYMBOL_NAME(sys_link)
.long SYMBOL_NAME(sys_unlink) /* 10 */
.long SYMBOL_NAME(sys_execve)
.long SYMBOL_NAME(sys_chdir)
.long SYMBOL_NAME(sys_time)
.long SYMBOL_NAME(sys_mknod)
.long SYMBOL_NAME(sys_chmod) /* 15 */
.long SYMBOL_NAME(sys_lchown16)
.long SYMBOL_NAME(sys_ni_syscall) /* old break syscall holder */
.long SYMBOL_NAME(sys_stat)
.long SYMBOL_NAME(sys_lseek)
.long SYMBOL_NAME(sys_getpid) /* 20 */
.long SYMBOL_NAME(sys_mount)
.long SYMBOL_NAME(sys_oldumount)
.long SYMBOL_NAME(sys_setuid16)
.long SYMBOL_NAME(sys_getuid16)
.long SYMBOL_NAME(sys_stime) /* 25 */
.long SYMBOL_NAME(sys_ptrace)
.long SYMBOL_NAME(sys_alarm)
.long SYMBOL_NAME(sys_fstat)
.long SYMBOL_NAME(sys_pause)
.long SYMBOL_NAME(sys_utime) /* 30 */
.long SYMBOL_NAME(sys_ni_syscall) /* old stty syscall holder */
.long SYMBOL_NAME(sys_ni_syscall) /* old gtty syscall holder */
.long SYMBOL_NAME(sys_access)
.long SYMBOL_NAME(sys_nice)
.long SYMBOL_NAME(sys_ni_syscall) /* 35 */ /* old ftime syscall holder */
.long SYMBOL_NAME(sys_sync)
.long SYMBOL_NAME(sys_kill)
.long SYMBOL_NAME(sys_rename)
.long SYMBOL_NAME(sys_mkdir)
.long SYMBOL_NAME(sys_rmdir) /* 40 */
.long SYMBOL_NAME(sys_dup)
.long SYMBOL_NAME(sys_pipe)
.long SYMBOL_NAME(sys_times)
.long SYMBOL_NAME(sys_ni_syscall) /* old prof syscall holder */
.long SYMBOL_NAME(sys_brk) /* 45 */
.long SYMBOL_NAME(sys_setgid16)
.long SYMBOL_NAME(sys_getgid16)
.long SYMBOL_NAME(sys_signal)
.long SYMBOL_NAME(sys_geteuid16)
.long SYMBOL_NAME(sys_getegid16) /* 50 */
.long SYMBOL_NAME(sys_acct)
.long SYMBOL_NAME(sys_umount) /* recycled never used phys() */
.long SYMBOL_NAME(sys_ni_syscall) /* old lock syscall holder */
.long SYMBOL_NAME(sys_ioctl)
.long SYMBOL_NAME(sys_fcntl) /* 55 */
.long SYMBOL_NAME(sys_ni_syscall) /* old mpx syscall holder */
.long SYMBOL_NAME(sys_setpgid)
.long SYMBOL_NAME(sys_ni_syscall) /* old ulimit syscall holder */
.long SYMBOL_NAME(sys_ni_syscall) /* sys_olduname */
.long SYMBOL_NAME(sys_umask) /* 60 */
.long SYMBOL_NAME(sys_chroot)
.long SYMBOL_NAME(sys_ustat)
.long SYMBOL_NAME(sys_dup2)
.long SYMBOL_NAME(sys_getppid)
.long SYMBOL_NAME(sys_getpgrp) /* 65 */
.long SYMBOL_NAME(sys_setsid)
.long SYMBOL_NAME(sys_sigaction)
.long SYMBOL_NAME(sys_sgetmask)
.long SYMBOL_NAME(sys_ssetmask)
.long SYMBOL_NAME(sys_setreuid16) /* 70 */
.long SYMBOL_NAME(sys_setregid16)
.long SYMBOL_NAME(sys_sigsuspend)
.long SYMBOL_NAME(sys_sigpending)
.long SYMBOL_NAME(sys_sethostname)
.long SYMBOL_NAME(sys_setrlimit) /* 75 */
.long SYMBOL_NAME(sys_old_getrlimit)
.long SYMBOL_NAME(sys_getrusage)
.long SYMBOL_NAME(sys_gettimeofday)
.long SYMBOL_NAME(sys_settimeofday)
.long SYMBOL_NAME(sys_getgroups16) /* 80 */
.long SYMBOL_NAME(sys_setgroups16)
.long SYMBOL_NAME(sys_ni_syscall) /* sys_oldselect */
.long SYMBOL_NAME(sys_symlink)
.long SYMBOL_NAME(sys_lstat)
.long SYMBOL_NAME(sys_readlink) /* 85 */
.long SYMBOL_NAME(sys_uselib)
.long SYMBOL_NAME(sys_swapon)
.long SYMBOL_NAME(sys_reboot)
.long SYMBOL_NAME(old_readdir)
.long SYMBOL_NAME(old_mmap) /* 90 */
.long SYMBOL_NAME(sys_munmap)
.long SYMBOL_NAME(sys_truncate)
.long SYMBOL_NAME(sys_ftruncate)
.long SYMBOL_NAME(sys_fchmod)
.long SYMBOL_NAME(sys_fchown16) /* 95 */
.long SYMBOL_NAME(sys_getpriority)
.long SYMBOL_NAME(sys_setpriority)
.long SYMBOL_NAME(sys_ni_syscall) /* old profil syscall holder */
.long SYMBOL_NAME(sys_statfs)
.long SYMBOL_NAME(sys_fstatfs) /* 100 */
.long SYMBOL_NAME(sys_ni_syscall) /* ioperm */
.long SYMBOL_NAME(sys_socketcall)
.long SYMBOL_NAME(sys_syslog)
.long SYMBOL_NAME(sys_setitimer)
.long SYMBOL_NAME(sys_getitimer) /* 105 */
.long SYMBOL_NAME(sys_newstat)
.long SYMBOL_NAME(sys_newlstat)
.long SYMBOL_NAME(sys_newfstat)
.long SYMBOL_NAME(sys_uname)
.long SYMBOL_NAME(sys_ni_syscall) /* 110 */ /* iopl */
.long SYMBOL_NAME(sys_vhangup)
.long SYMBOL_NAME(sys_ni_syscall) /* idle */
.long SYMBOL_NAME(sys_ni_syscall) /* vm86old */
.long SYMBOL_NAME(sys_wait4)
.long SYMBOL_NAME(sys_swapoff) /* 115 */
.long SYMBOL_NAME(sys_sysinfo)
.long SYMBOL_NAME(sys_ipc)
.long SYMBOL_NAME(sys_fsync)
.long SYMBOL_NAME(sys_sigreturn)
.long SYMBOL_NAME(sys_clone) /* 120 */
.long SYMBOL_NAME(sys_setdomainname)
.long SYMBOL_NAME(sys_newuname)
.long SYMBOL_NAME(sys_ni_syscall) /* sys_modify_ldt */
.long SYMBOL_NAME(sys_adjtimex)
.long SYMBOL_NAME(sys_mprotect) /* 125 */
.long SYMBOL_NAME(sys_sigprocmask)
.long SYMBOL_NAME(sys_create_module)
.long SYMBOL_NAME(sys_init_module)
.long SYMBOL_NAME(sys_delete_module)
.long SYMBOL_NAME(sys_get_kernel_syms) /* 130 */
.long SYMBOL_NAME(sys_quotactl)
.long SYMBOL_NAME(sys_getpgid)
.long SYMBOL_NAME(sys_fchdir)
.long SYMBOL_NAME(sys_bdflush)
.long SYMBOL_NAME(sys_sysfs) /* 135 */
.long SYMBOL_NAME(sys_personality)
.long SYMBOL_NAME(sys_ni_syscall) /* for afs_syscall */
.long SYMBOL_NAME(sys_setfsuid16)
.long SYMBOL_NAME(sys_setfsgid16)
.long SYMBOL_NAME(sys_llseek) /* 140 */
.long SYMBOL_NAME(sys_getdents)
.long SYMBOL_NAME(sys_select)
.long SYMBOL_NAME(sys_flock)
.long SYMBOL_NAME(sys_msync)
.long SYMBOL_NAME(sys_readv) /* 145 */
.long SYMBOL_NAME(sys_writev)
.long SYMBOL_NAME(sys_getsid)
.long SYMBOL_NAME(sys_fdatasync)
.long SYMBOL_NAME(sys_sysctl)
.long SYMBOL_NAME(sys_mlock) /* 150 */
.long SYMBOL_NAME(sys_munlock)
.long SYMBOL_NAME(sys_mlockall)
.long SYMBOL_NAME(sys_munlockall)
.long SYMBOL_NAME(sys_sched_setparam)
.long SYMBOL_NAME(sys_sched_getparam) /* 155 */
.long SYMBOL_NAME(sys_sched_setscheduler)
.long SYMBOL_NAME(sys_sched_getscheduler)
.long SYMBOL_NAME(sys_sched_yield)
.long SYMBOL_NAME(sys_sched_get_priority_max)
.long SYMBOL_NAME(sys_sched_get_priority_min) /* 160 */
.long SYMBOL_NAME(sys_sched_rr_get_interval)
.long SYMBOL_NAME(sys_nanosleep)
.long SYMBOL_NAME(sys_mremap)
.long SYMBOL_NAME(sys_setresuid16)
.long SYMBOL_NAME(sys_getresuid16) /* 165 */
.long SYMBOL_NAME(sys_ni_syscall) /* vm86 */
.long SYMBOL_NAME(sys_query_module)
.long SYMBOL_NAME(sys_poll)
.long SYMBOL_NAME(sys_nfsservctl)
.long SYMBOL_NAME(sys_setresgid16) /* 170 */
.long SYMBOL_NAME(sys_getresgid16)
.long SYMBOL_NAME(sys_prctl)
.long SYMBOL_NAME(sys_rt_sigreturn)
.long SYMBOL_NAME(sys_rt_sigaction)
.long SYMBOL_NAME(sys_rt_sigprocmask) /* 175 */
.long SYMBOL_NAME(sys_rt_sigpending)
.long SYMBOL_NAME(sys_rt_sigtimedwait)
.long SYMBOL_NAME(sys_rt_sigqueueinfo)
.long SYMBOL_NAME(sys_rt_sigsuspend)
.long SYMBOL_NAME(sys_pread) /* 180 */
.long SYMBOL_NAME(sys_pwrite)
.long SYMBOL_NAME(sys_chown16)
.long SYMBOL_NAME(sys_getcwd)
.long SYMBOL_NAME(sys_capget)
.long SYMBOL_NAME(sys_capset) /* 185 */
.long SYMBOL_NAME(sys_sigaltstack)
.long SYMBOL_NAME(sys_sendfile)
.long SYMBOL_NAME(sys_ni_syscall) /* streams1 */
.long SYMBOL_NAME(sys_ni_syscall) /* streams2 */
.long SYMBOL_NAME(sys_vfork) /* 190 */
.long SYMBOL_NAME(sys_getrlimit)
.long SYMBOL_NAME(sys_mmap2)
.long SYMBOL_NAME(sys_truncate64)
.long SYMBOL_NAME(sys_ftruncate64)
.long SYMBOL_NAME(sys_stat64) /* 195 */
.long SYMBOL_NAME(sys_lstat64)
.long SYMBOL_NAME(sys_fstat64)
.long SYMBOL_NAME(sys_lchown)
.long SYMBOL_NAME(sys_getuid)
.long SYMBOL_NAME(sys_getgid) /* 200 */
.long SYMBOL_NAME(sys_geteuid)
.long SYMBOL_NAME(sys_getegid)
.long SYMBOL_NAME(sys_setreuid)
.long SYMBOL_NAME(sys_setregid)
.long SYMBOL_NAME(sys_getgroups) /* 205 */
.long SYMBOL_NAME(sys_setgroups)
.long SYMBOL_NAME(sys_fchown)
.long SYMBOL_NAME(sys_setresuid)
.long SYMBOL_NAME(sys_getresuid)
.long SYMBOL_NAME(sys_setresgid) /* 210 */
.long SYMBOL_NAME(sys_getresgid)
.long SYMBOL_NAME(sys_chown)
.long SYMBOL_NAME(sys_setuid)
.long SYMBOL_NAME(sys_setgid)
.long SYMBOL_NAME(sys_setfsuid) /* 215 */
.long SYMBOL_NAME(sys_setfsgid)
.long SYMBOL_NAME(sys_pivot_root)
.long SYMBOL_NAME(sys_mincore)
.long SYMBOL_NAME(sys_madvise)
/*
* NOTE!! This doesn't have to be exact - we just have
* to make sure we have _enough_ of the "sys_ni_syscall"
* entries. Don't panic if you notice that this hasn't
* been shrunk every time we add a new system call.
*/
.rept NR_syscalls-219
.long SYMBOL_NAME(sys_ni_syscall)
.endr
/* End of entry.S */
|
