1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* arch/sparc/kernel/entry.S: Sparc trap low-
3 *
4 * Copyright (C) 1995, 2007 David S. Miller (d
5 * Copyright (C) 1996 Eddie C. Dost (ecd@sky
6 * Copyright (C) 1996 Miguel de Icaza (miguel@
7 * Copyright (C) 1996-1999 Jakub Jelinek (jj
8 * Copyright (C) 1997 Anton Blanchard (anton@p
9 */
10
11 #include <linux/export.h>
12 #include <linux/linkage.h>
13 #include <linux/errno.h>
14 #include <linux/pgtable.h>
15
16 #include <asm/head.h>
17 #include <asm/asi.h>
18 #include <asm/smp.h>
19 #include <asm/contregs.h>
20 #include <asm/ptrace.h>
21 #include <asm/asm-offsets.h>
22 #include <asm/psr.h>
23 #include <asm/vaddrs.h>
24 #include <asm/page.h>
25 #include <asm/winmacro.h>
26 #include <asm/signal.h>
27 #include <asm/obio.h>
28 #include <asm/mxcc.h>
29 #include <asm/thread_info.h>
30 #include <asm/param.h>
31 #include <asm/unistd.h>
32
33 #include <asm/asmmacro.h>
34
35 #define curptr g6
36
37 /* These are just handy. */
38 #define _SV save %sp, -STACKFRAME_SZ, %
39 #define _RS restore
40
41 #define FLUSH_ALL_KERNEL_WINDOWS \
42 _SV; _SV; _SV; _SV; _SV; _SV; _SV; \
43 _RS; _RS; _RS; _RS; _RS; _RS; _RS;
44
45 .text
46
47 #ifdef CONFIG_KGDB
48 .align 4
49 .globl arch_kgdb_breakpoint
50 .type arch_kgdb_breakpoint,#
51 arch_kgdb_breakpoint:
52 ta 0x7d
53 retl
54 nop
55 .size arch_kgdb_breakpoint,.
56 #endif
57
58 #if defined(CONFIG_BLK_DEV_FD) || defined(CONF
59 .align 4
60 .globl floppy_hardint
61 floppy_hardint:
62 /*
63 * This code cannot touch registers %l
64 * because SAVE_ALL depends on their v
65 * on %l3 also, but we regenerate it b
66 * Other registers are:
67 * %l3 -- base address of fdc register
68 * %l4 -- pdma_vaddr
69 * %l5 -- scratch for ld/st address
70 * %l6 -- pdma_size
71 * %l7 -- scratch [floppy byte, ld/st
72 */
73
74 /* Do we have work to do? */
75 sethi %hi(doing_pdma), %l7
76 ld [%l7 + %lo(doing_pdma)], %l7
77 cmp %l7, 0
78 be floppy_dosoftint
79 nop
80
81 /* Load fdc register base */
82 sethi %hi(fdc_status), %l3
83 ld [%l3 + %lo(fdc_status)], %l3
84
85 /* Setup register addresses */
86 sethi %hi(pdma_vaddr), %l5 ! tran
87 ld [%l5 + %lo(pdma_vaddr)], %l4
88 sethi %hi(pdma_size), %l5 ! byte
89 ld [%l5 + %lo(pdma_size)], %l6
90 next_byte:
91 ldub [%l3], %l7
92
93 andcc %l7, 0x80, %g0 ! Does
94 bz floppy_fifo_emptied ! fifo
95 andcc %l7, 0x20, %g0 ! in n
96 bz floppy_overrun ! nope
97 andcc %l7, 0x40, %g0 ! 0=wr
98 bz floppy_write
99 sub %l6, 0x1, %l6
100
101 /* Ok, actually read this byte */
102 ldub [%l3 + 1], %l7
103 orcc %g0, %l6, %g0
104 stb %l7, [%l4]
105 bne next_byte
106 add %l4, 0x1, %l4
107
108 b floppy_tdone
109 nop
110
111 floppy_write:
112 /* Ok, actually write this byte */
113 ldub [%l4], %l7
114 orcc %g0, %l6, %g0
115 stb %l7, [%l3 + 1]
116 bne next_byte
117 add %l4, 0x1, %l4
118
119 /* fall through... */
120 floppy_tdone:
121 sethi %hi(pdma_vaddr), %l5
122 st %l4, [%l5 + %lo(pdma_vaddr)]
123 sethi %hi(pdma_size), %l5
124 st %l6, [%l5 + %lo(pdma_size)]
125 /* Flip terminal count pin */
126 set auxio_register, %l7
127 ld [%l7], %l7
128
129 ldub [%l7], %l5
130
131 or %l5, 0xc2, %l5
132 stb %l5, [%l7]
133 andn %l5, 0x02, %l5
134
135 2:
136 /* Kill some time so the bits set */
137 WRITE_PAUSE
138 WRITE_PAUSE
139
140 stb %l5, [%l7]
141
142 /* Prevent recursion */
143 sethi %hi(doing_pdma), %l7
144 b floppy_dosoftint
145 st %g0, [%l7 + %lo(doing_pdma)]
146
147 /* We emptied the FIFO, but we haven't
148 * as of yet. Store the current trans
149 * bytes left to read so we can contin
150 * fast IRQ comes in.
151 */
152 floppy_fifo_emptied:
153 sethi %hi(pdma_vaddr), %l5
154 st %l4, [%l5 + %lo(pdma_vaddr)]
155 sethi %hi(pdma_size), %l7
156 st %l6, [%l7 + %lo(pdma_size)]
157
158 /* Restore condition codes */
159 wr %l0, 0x0, %psr
160 WRITE_PAUSE
161
162 jmp %l1
163 rett %l2
164
165 floppy_overrun:
166 sethi %hi(pdma_vaddr), %l5
167 st %l4, [%l5 + %lo(pdma_vaddr)]
168 sethi %hi(pdma_size), %l5
169 st %l6, [%l5 + %lo(pdma_size)]
170 /* Prevent recursion */
171 sethi %hi(doing_pdma), %l7
172 st %g0, [%l7 + %lo(doing_pdma)]
173
174 /* fall through... */
175 floppy_dosoftint:
176 rd %wim, %l3
177 SAVE_ALL
178
179 /* Set all IRQs off. */
180 or %l0, PSR_PIL, %l4
181 wr %l4, 0x0, %psr
182 WRITE_PAUSE
183 wr %l4, PSR_ET, %psr
184 WRITE_PAUSE
185
186 mov 11, %o0 ! flop
187 mov %g0, %o1 ! devi
188 call sparc_floppy_irq
189 add %sp, STACKFRAME_SZ, %o2 ! stru
190
191 RESTORE_ALL
192
193 #endif /* (CONFIG_BLK_DEV_FD) */
194
195 /* Bad trap handler */
196 .globl bad_trap_handler
197 bad_trap_handler:
198 SAVE_ALL
199
200 wr %l0, PSR_ET, %psr
201 WRITE_PAUSE
202
203 add %sp, STACKFRAME_SZ, %o0 ! pt_r
204 call do_hw_interrupt
205 mov %l7, %o1 ! trap
206
207 RESTORE_ALL
208
209 /* For now all IRQ's not registered get sent h
210 * see if a routine is registered to handle th
211 * it will say so on the console.
212 */
213
214 .align 4
215 .globl real_irq_entry, patch_handler_
216 real_irq_entry:
217 SAVE_ALL
218
219 #ifdef CONFIG_SMP
220 .globl patchme_maybe_smp_msg
221
222 cmp %l7, 11
223 patchme_maybe_smp_msg:
224 bgu maybe_smp4m_msg
225 nop
226 #endif
227
228 real_irq_continue:
229 or %l0, PSR_PIL, %g2
230 wr %g2, 0x0, %psr
231 WRITE_PAUSE
232 wr %g2, PSR_ET, %psr
233 WRITE_PAUSE
234 mov %l7, %o0 ! irq
235 patch_handler_irq:
236 call handler_irq
237 add %sp, STACKFRAME_SZ, %o1 ! pt_r
238 or %l0, PSR_PIL, %g2 ! rest
239 wr %g2, PSR_ET, %psr ! keep
240 WRITE_PAUSE
241
242 RESTORE_ALL
243
244 #ifdef CONFIG_SMP
245 /* SMP per-cpu ticker interrupts are h
246 smp4m_ticker:
247 bne real_irq_continue+4
248 or %l0, PSR_PIL, %g2
249 wr %g2, 0x0, %psr
250 WRITE_PAUSE
251 wr %g2, PSR_ET, %psr
252 WRITE_PAUSE
253 call smp4m_percpu_timer_interrupt
254 add %sp, STACKFRAME_SZ, %o0
255 wr %l0, PSR_ET, %psr
256 WRITE_PAUSE
257 RESTORE_ALL
258
259 #define GET_PROCESSOR4M_ID(reg) \
260 rd %tbr, %reg; \
261 srl %reg, 12, %reg; \
262 and %reg, 3, %reg;
263
264 /* Here is where we check for possible
265 * on some level other than 15 which i
266 * for cross calls. That has a separa
267 *
268 * IPIs are sent on Level 12, 13 and 1
269 */
270 maybe_smp4m_msg:
271 GET_PROCESSOR4M_ID(o3)
272 sethi %hi(sun4m_irq_percpu), %l5
273 sll %o3, 2, %o3
274 or %l5, %lo(sun4m_irq_percpu), %o
275 sethi %hi(0x70000000), %o2 ! Chec
276 ld [%o5 + %o3], %o1
277 ld [%o1 + 0x00], %o3 ! sun4
278 andcc %o3, %o2, %g0
279 be,a smp4m_ticker
280 cmp %l7, 14
281 /* Soft-IRQ IPI */
282 st %o2, [%o1 + 0x04] ! sun4
283 WRITE_PAUSE
284 ld [%o1 + 0x00], %g0 ! sun4
285 WRITE_PAUSE
286 or %l0, PSR_PIL, %l4
287 wr %l4, 0x0, %psr
288 WRITE_PAUSE
289 wr %l4, PSR_ET, %psr
290 WRITE_PAUSE
291 srl %o3, 28, %o2 ! shif
292 maybe_smp4m_msg_check_single:
293 andcc %o2, 0x1, %g0
294 beq,a maybe_smp4m_msg_check_mask
295 andcc %o2, 0x2, %g0
296 call smp_call_function_single_inter
297 nop
298 andcc %o2, 0x2, %g0
299 maybe_smp4m_msg_check_mask:
300 beq,a maybe_smp4m_msg_check_resched
301 andcc %o2, 0x4, %g0
302 call smp_call_function_interrupt
303 nop
304 andcc %o2, 0x4, %g0
305 maybe_smp4m_msg_check_resched:
306 /* rescheduling is done in RESTORE_ALL
307 beq,a maybe_smp4m_msg_out
308 nop
309 call smp_resched_interrupt
310 nop
311 maybe_smp4m_msg_out:
312 RESTORE_ALL
313
314 .align 4
315 .globl linux_trap_ipi15_sun4m
316 linux_trap_ipi15_sun4m:
317 SAVE_ALL
318 sethi %hi(0x80000000), %o2
319 GET_PROCESSOR4M_ID(o0)
320 sethi %hi(sun4m_irq_percpu), %l5
321 or %l5, %lo(sun4m_irq_percpu), %o
322 sll %o0, 2, %o0
323 ld [%o5 + %o0], %o5
324 ld [%o5 + 0x00], %o3 ! sun4
325 andcc %o3, %o2, %g0
326 be sun4m_nmi_error ! Must
327 st %o2, [%o5 + 0x04] ! sun4
328 WRITE_PAUSE
329 ld [%o5 + 0x00], %g0 ! sun4
330 WRITE_PAUSE
331 or %l0, PSR_PIL, %l4
332 wr %l4, 0x0, %psr
333 WRITE_PAUSE
334 wr %l4, PSR_ET, %psr
335 WRITE_PAUSE
336 call smp4m_cross_call_irq
337 nop
338 b ret_trap_lockless_ipi
339 clr %l6
340
341 .globl smp4d_ticker
342 /* SMP per-cpu ticker interrupts are h
343 smp4d_ticker:
344 SAVE_ALL
345 or %l0, PSR_PIL, %g2
346 sethi %hi(CC_ICLR), %o0
347 sethi %hi(1 << 14), %o1
348 or %o0, %lo(CC_ICLR), %o0
349 stha %o1, [%o0] ASI_M_MXCC /* Cle
350 wr %g2, 0x0, %psr
351 WRITE_PAUSE
352 wr %g2, PSR_ET, %psr
353 WRITE_PAUSE
354 call smp4d_percpu_timer_interrupt
355 add %sp, STACKFRAME_SZ, %o0
356 wr %l0, PSR_ET, %psr
357 WRITE_PAUSE
358 RESTORE_ALL
359
360 .align 4
361 .globl linux_trap_ipi15_sun4d
362 linux_trap_ipi15_sun4d:
363 SAVE_ALL
364 sethi %hi(CC_BASE), %o4
365 sethi %hi(MXCC_ERR_ME|MXCC_ERR_PEW|M
366 or %o4, (CC_EREG - CC_BASE), %o0
367 ldda [%o0] ASI_M_MXCC, %o0
368 andcc %o0, %o2, %g0
369 bne 1f
370 sethi %hi(BB_STAT2), %o2
371 lduba [%o2] ASI_M_CTL, %o2
372 andcc %o2, BB_STAT2_MASK, %g0
373 bne 2f
374 or %o4, (CC_ICLR - CC_BASE), %o0
375 sethi %hi(1 << 15), %o1
376 stha %o1, [%o0] ASI_M_MXCC /* Cle
377 or %l0, PSR_PIL, %l4
378 wr %l4, 0x0, %psr
379 WRITE_PAUSE
380 wr %l4, PSR_ET, %psr
381 WRITE_PAUSE
382 call smp4d_cross_call_irq
383 nop
384 b ret_trap_lockless_ipi
385 clr %l6
386
387 1: /* MXCC error */
388 2: /* BB error */
389 /* Disable PIL 15 */
390 set CC_IMSK, %l4
391 lduha [%l4] ASI_M_MXCC, %l5
392 sethi %hi(1 << 15), %l7
393 or %l5, %l7, %l5
394 stha %l5, [%l4] ASI_M_MXCC
395 /* FIXME */
396 1: b,a 1b
397
398 .globl smpleon_ipi
399 .extern leon_ipi_interrupt
400 /* SMP per-cpu IPI interrupts are hand
401 smpleon_ipi:
402 SAVE_ALL
403 or %l0, PSR_PIL, %g2
404 wr %g2, 0x0, %psr
405 WRITE_PAUSE
406 wr %g2, PSR_ET, %psr
407 WRITE_PAUSE
408 call leonsmp_ipi_interrupt
409 add %sp, STACKFRAME_SZ, %o1 ! pt_r
410 wr %l0, PSR_ET, %psr
411 WRITE_PAUSE
412 RESTORE_ALL
413
414 .align 4
415 .globl linux_trap_ipi15_leon
416 linux_trap_ipi15_leon:
417 SAVE_ALL
418 or %l0, PSR_PIL, %l4
419 wr %l4, 0x0, %psr
420 WRITE_PAUSE
421 wr %l4, PSR_ET, %psr
422 WRITE_PAUSE
423 call leon_cross_call_irq
424 nop
425 b ret_trap_lockless_ipi
426 clr %l6
427
428 #endif /* CONFIG_SMP */
429
430 /* This routine handles illegal instru
431 * instruction attempts from user code
432 */
433 .align 4
434 .globl bad_instruction
435 bad_instruction:
436 sethi %hi(0xc1f80000), %l4
437 ld [%l1], %l5
438 sethi %hi(0x81d80000), %l7
439 and %l5, %l4, %l5
440 cmp %l5, %l7
441 be 1f
442 SAVE_ALL
443
444 wr %l0, PSR_ET, %psr
445 WRITE_PAUSE
446
447 add %sp, STACKFRAME_SZ, %o0
448 mov %l1, %o1
449 mov %l2, %o2
450 call do_illegal_instruction
451 mov %l0, %o3
452
453 RESTORE_ALL
454
455 1: /* unimplemented flush - just skip */
456 jmpl %l2, %g0
457 rett %l2 + 4
458
459 .align 4
460 .globl priv_instruction
461 priv_instruction:
462 SAVE_ALL
463
464 wr %l0, PSR_ET, %psr
465 WRITE_PAUSE
466
467 add %sp, STACKFRAME_SZ, %o0
468 mov %l1, %o1
469 mov %l2, %o2
470 call do_priv_instruction
471 mov %l0, %o3
472
473 RESTORE_ALL
474
475 /* This routine handles unaligned data
476 .align 4
477 .globl mna_handler
478 mna_handler:
479 andcc %l0, PSR_PS, %g0
480 be mna_fromuser
481 nop
482
483 SAVE_ALL
484
485 wr %l0, PSR_ET, %psr
486 WRITE_PAUSE
487
488 ld [%l1], %o1
489 call kernel_unaligned_trap
490 add %sp, STACKFRAME_SZ, %o0
491
492 RESTORE_ALL
493
494 mna_fromuser:
495 SAVE_ALL
496
497 wr %l0, PSR_ET, %psr
498 WRITE_PAUSE
499
500 ld [%l1], %o1
501 call user_unaligned_trap
502 add %sp, STACKFRAME_SZ, %o0
503
504 RESTORE_ALL
505
506 /* This routine handles floating point
507 .align 4
508 .globl fpd_trap_handler
509 fpd_trap_handler:
510 SAVE_ALL
511
512 wr %l0, PSR_ET, %psr
513 WRITE_PAUSE
514
515 add %sp, STACKFRAME_SZ, %o0
516 mov %l1, %o1
517 mov %l2, %o2
518 call do_fpd_trap
519 mov %l0, %o3
520
521 RESTORE_ALL
522
523 /* This routine handles Floating Point
524 .align 4
525 .globl fpe_trap_handler
526 fpe_trap_handler:
527 set fpsave_magic, %l5
528 cmp %l1, %l5
529 be 1f
530 sethi %hi(fpsave), %l5
531 or %l5, %lo(fpsave), %l5
532 cmp %l1, %l5
533 bne 2f
534 sethi %hi(fpsave_catch2), %l5
535 or %l5, %lo(fpsave_catch2), %l5
536 wr %l0, 0x0, %psr
537 WRITE_PAUSE
538 jmp %l5
539 rett %l5 + 4
540 1:
541 sethi %hi(fpsave_catch), %l5
542 or %l5, %lo(fpsave_catch), %l5
543 wr %l0, 0x0, %psr
544 WRITE_PAUSE
545 jmp %l5
546 rett %l5 + 4
547
548 2:
549 SAVE_ALL
550
551 wr %l0, PSR_ET, %psr
552 WRITE_PAUSE
553
554 add %sp, STACKFRAME_SZ, %o0
555 mov %l1, %o1
556 mov %l2, %o2
557 call do_fpe_trap
558 mov %l0, %o3
559
560 RESTORE_ALL
561
562 /* This routine handles Tag Overflow E
563 .align 4
564 .globl do_tag_overflow
565 do_tag_overflow:
566 SAVE_ALL
567
568 wr %l0, PSR_ET, %psr
569 WRITE_PAUSE
570
571 add %sp, STACKFRAME_SZ, %o0
572 mov %l1, %o1
573 mov %l2, %o2
574 call handle_tag_overflow
575 mov %l0, %o3
576
577 RESTORE_ALL
578
579 /* This routine handles Watchpoint Exc
580 .align 4
581 .globl do_watchpoint
582 do_watchpoint:
583 SAVE_ALL
584
585 wr %l0, PSR_ET, %psr
586 WRITE_PAUSE
587
588 add %sp, STACKFRAME_SZ, %o0
589 mov %l1, %o1
590 mov %l2, %o2
591 call handle_watchpoint
592 mov %l0, %o3
593
594 RESTORE_ALL
595
596 /* This routine handles Register Acces
597 .align 4
598 .globl do_reg_access
599 do_reg_access:
600 SAVE_ALL
601
602 wr %l0, PSR_ET, %psr
603 WRITE_PAUSE
604
605 add %sp, STACKFRAME_SZ, %o0
606 mov %l1, %o1
607 mov %l2, %o2
608 call handle_reg_access
609 mov %l0, %o3
610
611 RESTORE_ALL
612
613 /* This routine handles Co-Processor D
614 .align 4
615 .globl do_cp_disabled
616 do_cp_disabled:
617 SAVE_ALL
618
619 wr %l0, PSR_ET, %psr
620 WRITE_PAUSE
621
622 add %sp, STACKFRAME_SZ, %o0
623 mov %l1, %o1
624 mov %l2, %o2
625 call handle_cp_disabled
626 mov %l0, %o3
627
628 RESTORE_ALL
629
630 /* This routine handles Co-Processor E
631 .align 4
632 .globl do_cp_exception
633 do_cp_exception:
634 SAVE_ALL
635
636 wr %l0, PSR_ET, %psr
637 WRITE_PAUSE
638
639 add %sp, STACKFRAME_SZ, %o0
640 mov %l1, %o1
641 mov %l2, %o2
642 call handle_cp_exception
643 mov %l0, %o3
644
645 RESTORE_ALL
646
647 /* This routine handles Hardware Divid
648 .align 4
649 .globl do_hw_divzero
650 do_hw_divzero:
651 SAVE_ALL
652
653 wr %l0, PSR_ET, %psr
654 WRITE_PAUSE
655
656 add %sp, STACKFRAME_SZ, %o0
657 mov %l1, %o1
658 mov %l2, %o2
659 call handle_hw_divzero
660 mov %l0, %o3
661
662 RESTORE_ALL
663
664 .align 4
665 .globl do_flush_windows
666 do_flush_windows:
667 SAVE_ALL
668
669 wr %l0, PSR_ET, %psr
670 WRITE_PAUSE
671
672 andcc %l0, PSR_PS, %g0
673 bne dfw_kernel
674 nop
675
676 call flush_user_windows
677 nop
678
679 /* Advance over the trap instruction.
680 ld [%sp + STACKFRAME_SZ + PT_NPC]
681 add %l1, 0x4, %l2
682 st %l1, [%sp + STACKFRAME_SZ + PT
683 st %l2, [%sp + STACKFRAME_SZ + PT
684
685 RESTORE_ALL
686
687 .globl flush_patch_one
688
689 /* We get these for debugging routines
690 dfw_kernel:
691 flush_patch_one:
692 FLUSH_ALL_KERNEL_WINDOWS
693
694 /* Advance over the trap instruction.
695 ld [%sp + STACKFRAME_SZ + PT_NPC]
696 add %l1, 0x4, %l2
697 st %l1, [%sp + STACKFRAME_SZ + PT
698 st %l2, [%sp + STACKFRAME_SZ + PT
699
700 RESTORE_ALL
701
702 /* The getcc software trap. The user
703 * the %psr in register %g1.
704 */
705
706 .align 4
707 .globl getcc_trap_handler
708 getcc_trap_handler:
709 srl %l0, 20, %g1 ! give user
710 and %g1, 0xf, %g1 ! only ICC bit
711 jmp %l2 ! advance over
712 rett %l2 + 0x4 ! like this...
713
714 /* The setcc software trap. The user
715 * that it would like placed in the %p
716 * any unintentional bits!
717 */
718
719 .align 4
720 .globl setcc_trap_handler
721 setcc_trap_handler:
722 sll %g1, 0x14, %l4
723 set PSR_ICC, %l5
724 andn %l0, %l5, %l0 ! clear ICC bi
725 and %l4, %l5, %l4 ! clear non-IC
726 or %l4, %l0, %l4 ! or them in..
727
728 wr %l4, 0x0, %psr ! set new %psr
729 WRITE_PAUSE ! TI scumbags.
730
731 jmp %l2 ! advance over
732 rett %l2 + 0x4 ! like this...
733
734 sun4m_nmi_error:
735 /* NMI async memory error handling. */
736 sethi %hi(0x80000000), %l4
737 sethi %hi(sun4m_irq_global), %o5
738 ld [%o5 + %lo(sun4m_irq_global)],
739 st %l4, [%l5 + 0x0c] ! sun4
740 WRITE_PAUSE
741 ld [%l5 + 0x00], %g0 ! sun4
742 WRITE_PAUSE
743 or %l0, PSR_PIL, %l4
744 wr %l4, 0x0, %psr
745 WRITE_PAUSE
746 wr %l4, PSR_ET, %psr
747 WRITE_PAUSE
748 call sun4m_nmi
749 nop
750 st %l4, [%l5 + 0x08] ! sun4
751 WRITE_PAUSE
752 ld [%l5 + 0x00], %g0 ! sun4
753 WRITE_PAUSE
754 RESTORE_ALL
755
756 #ifndef CONFIG_SMP
757 .align 4
758 .globl linux_trap_ipi15_sun4m
759 linux_trap_ipi15_sun4m:
760 SAVE_ALL
761
762 ba sun4m_nmi_error
763 nop
764 #endif /* CONFIG_SMP */
765
766 .align 4
767 .globl srmmu_fault
768 srmmu_fault:
769 mov 0x400, %l5
770 mov 0x300, %l4
771
772 LEON_PI(lda [%l5] ASI_LEON_MMUREGS, %l6)
773 SUN_PI_(lda [%l5] ASI_M_MMUREGS, %l6)
774
775 LEON_PI(lda [%l4] ASI_LEON_MMUREGS, %l5)
776 SUN_PI_(lda [%l4] ASI_M_MMUREGS, %l5)
777
778 andn %l6, 0xfff, %l6
779 srl %l5, 6, %l5
780
781 and %l5, 2, %l5
782 or %l5, %l6, %l6
783
784 or %l6, %l7, %l7
785
786 SAVE_ALL
787
788 mov %l7, %o1
789 mov %l7, %o2
790 and %o1, 1, %o1 ! arg2
791 mov %l7, %o3
792 and %o2, 2, %o2 ! arg3
793 andn %o3, 0xfff, %o3 ! arg4
794
795 wr %l0, PSR_ET, %psr
796 WRITE_PAUSE
797
798 call do_sparc_fault
799 add %sp, STACKFRAME_SZ, %o0 ! arg1
800
801 RESTORE_ALL
802
803 .align 4
804 sunos_execv:
805 .globl sunos_execv
806 b sys_execve
807 clr %i2
808
809 .align 4
810 .globl sys_sigstack
811 sys_sigstack:
812 mov %o7, %l5
813 mov %fp, %o2
814 call do_sys_sigstack
815 mov %l5, %o7
816
817 .align 4
818 .globl sys_sigreturn
819 sys_sigreturn:
820 call do_sigreturn
821 add %sp, STACKFRAME_SZ, %o0
822
823 ld [%curptr + TI_FLAGS], %l5
824 andcc %l5, _TIF_SYSCALL_TRACE, %g0
825 be 1f
826 nop
827
828 call syscall_trace
829 mov 1, %o1
830
831 1:
832 /* We don't want to muck with user reg
833 * normal syscall, just return.
834 */
835 RESTORE_ALL
836
837 .align 4
838 .globl sys_rt_sigreturn
839 sys_rt_sigreturn:
840 call do_rt_sigreturn
841 add %sp, STACKFRAME_SZ, %o0
842
843 ld [%curptr + TI_FLAGS], %l5
844 andcc %l5, _TIF_SYSCALL_TRACE, %g0
845 be 1f
846 nop
847
848 add %sp, STACKFRAME_SZ, %o0
849 call syscall_trace
850 mov 1, %o1
851
852 1:
853 /* We are returning to a signal handle
854 RESTORE_ALL
855
856 /* Now that we have a real sys_clone,
857 * implemented in terms of it. Our _r
858 * of SunOS vfork() will use sys_vfork
859 *
860 * XXX These three should be consolida
861 * XXX code just like on sparc64... -D
862 */
863 .align 4
864 .globl sys_fork, flush_patch_two
865 sys_fork:
866 mov %o7, %l5
867 flush_patch_two:
868 FLUSH_ALL_KERNEL_WINDOWS;
869 ld [%curptr + TI_TASK], %o4
870 rd %psr, %g4
871 WRITE_PAUSE
872 rd %wim, %g5
873 WRITE_PAUSE
874 std %g4, [%o4 + AOFF_task_thread +
875 add %sp, STACKFRAME_SZ, %o0
876 call sparc_fork
877 mov %l5, %o7
878
879 /* Whee, kernel threads! */
880 .globl sys_clone, flush_patch_three
881 sys_clone:
882 mov %o7, %l5
883 flush_patch_three:
884 FLUSH_ALL_KERNEL_WINDOWS;
885 ld [%curptr + TI_TASK], %o4
886 rd %psr, %g4
887 WRITE_PAUSE
888 rd %wim, %g5
889 WRITE_PAUSE
890 std %g4, [%o4 + AOFF_task_thread +
891 add %sp, STACKFRAME_SZ, %o0
892 call sparc_clone
893 mov %l5, %o7
894
895 /* Whee, real vfork! */
896 .globl sys_vfork, flush_patch_four
897 sys_vfork:
898 flush_patch_four:
899 FLUSH_ALL_KERNEL_WINDOWS;
900 ld [%curptr + TI_TASK], %o4
901 rd %psr, %g4
902 WRITE_PAUSE
903 rd %wim, %g5
904 WRITE_PAUSE
905 std %g4, [%o4 + AOFF_task_thread +
906 sethi %hi(sparc_vfork), %l1
907 jmpl %l1 + %lo(sparc_vfork), %g0
908 add %sp, STACKFRAME_SZ, %o0
909
910 .align 4
911 linux_sparc_ni_syscall:
912 sethi %hi(sys_ni_syscall), %l7
913 b do_syscall
914 or %l7, %lo(sys_ni_syscall), %l7
915
916 linux_syscall_trace:
917 add %sp, STACKFRAME_SZ, %o0
918 call syscall_trace
919 mov 0, %o1
920 cmp %o0, 0
921 bne 3f
922 mov -ENOSYS, %o0
923
924 /* Syscall tracing can modify the regi
925 ld [%sp + STACKFRAME_SZ + PT_G1],
926 sethi %hi(sys_call_table), %l7
927 ld [%sp + STACKFRAME_SZ + PT_I0],
928 or %l7, %lo(sys_call_table), %l7
929 ld [%sp + STACKFRAME_SZ + PT_I1],
930 ld [%sp + STACKFRAME_SZ + PT_I2],
931 ld [%sp + STACKFRAME_SZ + PT_I3],
932 ld [%sp + STACKFRAME_SZ + PT_I4],
933 ld [%sp + STACKFRAME_SZ + PT_I5],
934 cmp %g1, NR_syscalls
935 bgeu 3f
936 mov -ENOSYS, %o0
937
938 sll %g1, 2, %l4
939 mov %i0, %o0
940 ld [%l7 + %l4], %l7
941 mov %i1, %o1
942 mov %i2, %o2
943 mov %i3, %o3
944 b 2f
945 mov %i4, %o4
946
947 .globl ret_from_fork
948 ret_from_fork:
949 call schedule_tail
950 ld [%g3 + TI_TASK], %o0
951 b ret_sys_call
952 ld [%sp + STACKFRAME_SZ + PT_I0],
953
954 .globl ret_from_kernel_thread
955 ret_from_kernel_thread:
956 call schedule_tail
957 ld [%g3 + TI_TASK], %o0
958 ld [%sp + STACKFRAME_SZ + PT_G1],
959 call %l0
960 ld [%sp + STACKFRAME_SZ + PT_G2],
961 rd %psr, %l1
962 ld [%sp + STACKFRAME_SZ + PT_PSR]
963 andn %l0, PSR_CWP, %l0
964 nop
965 and %l1, PSR_CWP, %l1
966 or %l0, %l1, %l0
967 st %l0, [%sp + STACKFRAME_SZ + PT
968 b ret_sys_call
969 mov 0, %o0
970
971 /* Linux native system calls enter her
972 .align 4
973 .globl linux_sparc_syscall
974 linux_sparc_syscall:
975 sethi %hi(PSR_SYSCALL), %l4
976 or %l0, %l4, %l0
977 /* Direct access to user regs, must fa
978 cmp %g1, NR_syscalls
979 bgeu linux_sparc_ni_syscall
980 sll %g1, 2, %l4
981 ld [%l7 + %l4], %l7
982
983 do_syscall:
984 SAVE_ALL_HEAD
985 rd %wim, %l3
986
987 wr %l0, PSR_ET, %psr
988 mov %i0, %o0
989 mov %i1, %o1
990 mov %i2, %o2
991
992 ld [%curptr + TI_FLAGS], %l5
993 mov %i3, %o3
994 andcc %l5, _TIF_SYSCALL_TRACE, %g0
995 mov %i4, %o4
996 bne linux_syscall_trace
997 mov %i0, %l6
998 2:
999 call %l7
1000 mov %i5, %o5
1001
1002 3:
1003 st %o0, [%sp + STACKFRAME_SZ + P
1004
1005 ret_sys_call:
1006 ld [%curptr + TI_FLAGS], %l5
1007 cmp %o0, -ERESTART_RESTARTBLOCK
1008 ld [%sp + STACKFRAME_SZ + PT_PSR
1009 set PSR_C, %g2
1010 bgeu 1f
1011 andcc %l5, _TIF_SYSCALL_TRACE, %g0
1012
1013 /* System call success, clear Carry c
1014 andn %g3, %g2, %g3
1015 st %g3, [%sp + STACKFRAME_SZ + P
1016 bne linux_syscall_trace2
1017 ld [%sp + STACKFRAME_SZ + PT_NPC
1018 add %l1, 0x4, %l2
1019 st %l1, [%sp + STACKFRAME_SZ + P
1020 b ret_trap_entry
1021 st %l2, [%sp + STACKFRAME_SZ + P
1022 1:
1023 /* System call failure, set Carry con
1024 * Also, get abs(errno) to return to
1025 */
1026 sub %g0, %o0, %o0
1027 or %g3, %g2, %g3
1028 st %o0, [%sp + STACKFRAME_SZ + P
1029 st %g3, [%sp + STACKFRAME_SZ + P
1030 bne linux_syscall_trace2
1031 ld [%sp + STACKFRAME_SZ + PT_NPC
1032 add %l1, 0x4, %l2
1033 st %l1, [%sp + STACKFRAME_SZ + P
1034 b ret_trap_entry
1035 st %l2, [%sp + STACKFRAME_SZ + P
1036
1037 linux_syscall_trace2:
1038 add %sp, STACKFRAME_SZ, %o0
1039 mov 1, %o1
1040 call syscall_trace
1041 add %l1, 0x4, %l2
1042 st %l1, [%sp + STACKFRAME_SZ + P
1043 b ret_trap_entry
1044 st %l2, [%sp + STACKFRAME_SZ + P
1045
1046
1047 /* Saving and restoring the FPU state is best
1048 *
1049 * void fpsave(unsigned long *fpregs, unsigne
1050 * void *fpqueue, unsigned long *
1051 */
1052
1053 .globl fpsave
1054 fpsave:
1055 st %fsr, [%o1] ! this can tr
1056 ld [%o1], %g1
1057 set 0x2000, %g4
1058 andcc %g1, %g4, %g0
1059 be 2f
1060 mov 0, %g2
1061
1062 /* We have an fpqueue to save. */
1063 1:
1064 std %fq, [%o2]
1065 fpsave_magic:
1066 st %fsr, [%o1]
1067 ld [%o1], %g3
1068 andcc %g3, %g4, %g0
1069 add %g2, 1, %g2
1070 bne 1b
1071 add %o2, 8, %o2
1072
1073 2:
1074 st %g2, [%o3]
1075
1076 std %f0, [%o0 + 0x00]
1077 std %f2, [%o0 + 0x08]
1078 std %f4, [%o0 + 0x10]
1079 std %f6, [%o0 + 0x18]
1080 std %f8, [%o0 + 0x20]
1081 std %f10, [%o0 + 0x28]
1082 std %f12, [%o0 + 0x30]
1083 std %f14, [%o0 + 0x38]
1084 std %f16, [%o0 + 0x40]
1085 std %f18, [%o0 + 0x48]
1086 std %f20, [%o0 + 0x50]
1087 std %f22, [%o0 + 0x58]
1088 std %f24, [%o0 + 0x60]
1089 std %f26, [%o0 + 0x68]
1090 std %f28, [%o0 + 0x70]
1091 retl
1092 std %f30, [%o0 + 0x78]
1093
1094 /* Thanks for Theo Deraadt and the au
1095 * code for pointing out this possibl
1096 * above we could trap on the fsr sto
1097 * code has to know how to deal with
1098 */
1099 fpsave_catch:
1100 b fpsave_magic + 4
1101 st %fsr, [%o1]
1102
1103 fpsave_catch2:
1104 b fpsave + 4
1105 st %fsr, [%o1]
1106
1107 /* void fpload(unsigned long *fpregs,
1108
1109 .globl fpload
1110 fpload:
1111 ldd [%o0 + 0x00], %f0
1112 ldd [%o0 + 0x08], %f2
1113 ldd [%o0 + 0x10], %f4
1114 ldd [%o0 + 0x18], %f6
1115 ldd [%o0 + 0x20], %f8
1116 ldd [%o0 + 0x28], %f10
1117 ldd [%o0 + 0x30], %f12
1118 ldd [%o0 + 0x38], %f14
1119 ldd [%o0 + 0x40], %f16
1120 ldd [%o0 + 0x48], %f18
1121 ldd [%o0 + 0x50], %f20
1122 ldd [%o0 + 0x58], %f22
1123 ldd [%o0 + 0x60], %f24
1124 ldd [%o0 + 0x68], %f26
1125 ldd [%o0 + 0x70], %f28
1126 ldd [%o0 + 0x78], %f30
1127 ld [%o1], %fsr
1128 retl
1129 nop
1130
1131 /* __ndelay and __udelay take two arg
1132 * 0 - nsecs or usecs to delay
1133 * 1 - per_cpu udelay_val (loops per
1134 *
1135 * Note that ndelay gives HZ times hi
1136 * limit. udelay can handle up to 1s
1137 */
1138 .globl __ndelay
1139 __ndelay:
1140 save %sp, -STACKFRAME_SZ, %sp
1141 mov %i0, %o0 ! rou
1142 mov 0x1ae, %o1 ! 2**
1143 umul %o0, %o1, %o0
1144 rd %y, %o1
1145 mov %i1, %o1 ! ude
1146 umul %o0, %o1, %o0
1147 rd %y, %o1
1148 ba delay_continue
1149 mov %o1, %o0 ! >>3
1150
1151 .globl __udelay
1152 __udelay:
1153 save %sp, -STACKFRAME_SZ, %sp
1154 mov %i0, %o0
1155 sethi %hi(0x10c7), %o1 ! rou
1156 or %o1, %lo(0x10c7), %o1 ! 2**
1157 umul %o0, %o1, %o0
1158 rd %y, %o1
1159 mov %i1, %o1 ! ude
1160 umul %o0, %o1, %o0
1161 rd %y, %o1
1162 sethi %hi(0x028f4b62), %l0 ! Add
1163 or %g0, %lo(0x028f4b62), %l0
1164 addcc %o0, %l0, %o0 ! 2**
1165 bcs,a 3f
1166 add %o1, 0x01, %o1
1167 3:
1168 mov HZ, %o0 ! >>3
1169 umul %o0, %o1, %o0
1170 rd %y, %o1
1171
1172 delay_continue:
1173 cmp %o0, 0x0
1174 1:
1175 bne 1b
1176 subcc %o0, 1, %o0
1177
1178 ret
1179 restore
1180 EXPORT_SYMBOL(__udelay)
1181 EXPORT_SYMBOL(__ndelay)
1182
1183 /* Handle a software breakpoint */
1184 /* We have to inform parent that chil
1185 .align 4
1186 .globl breakpoint_trap
1187 breakpoint_trap:
1188 rd %wim,%l3
1189 SAVE_ALL
1190 wr %l0, PSR_ET, %psr
1191 WRITE_PAUSE
1192
1193 st %i0, [%sp + STACKFRAME_SZ + P
1194 call sparc_breakpoint
1195 add %sp, STACKFRAME_SZ, %o0
1196
1197 RESTORE_ALL
1198
1199 #ifdef CONFIG_KGDB
1200 ENTRY(kgdb_trap_low)
1201 rd %wim,%l3
1202 SAVE_ALL
1203 wr %l0, PSR_ET, %psr
1204 WRITE_PAUSE
1205
1206 mov %l7, %o0 ! tra
1207 call kgdb_trap
1208 add %sp, STACKFRAME_SZ, %o1 ! str
1209
1210 RESTORE_ALL
1211 ENDPROC(kgdb_trap_low)
1212 #endif
1213
1214 .align 4
1215 .globl flush_patch_exception
1216 flush_patch_exception:
1217 FLUSH_ALL_KERNEL_WINDOWS;
1218 ldd [%o0], %o6
1219 jmpl %o7 + 0xc, %g0
1220 mov 1, %g1
1221
1222 .align 4
1223 .globl kill_user_windows, kuw_patch1
1224 .globl kuw_patch1
1225 kuw_patch1_7win: sll %o3, 6, %o3
1226
1227 /* No matter how much overhead this r
1228 * case scenario, it is several times
1229 * traps with the old method of just
1230 */
1231 kill_user_windows:
1232 ld [%g6 + TI_UWINMASK], %o0
1233 orcc %g0, %o0, %g0
1234 be 3f
1235 rd %psr, %o5
1236 or %o5, PSR_PIL, %o4
1237 wr %o4, 0x0, %psr
1238 WRITE_PAUSE
1239 1:
1240 ld [%g6 + TI_UWINMASK], %o0
1241 orcc %g0, %o0, %g0
1242 be 4f
1243 rd %wim, %o3
1244 srl %o3, 1, %o4
1245 kuw_patch1:
1246 sll %o3, 7, %o3
1247 or %o4, %o3, %o3
1248 andncc %o0, %o3, %o0
1249 bne kuw_patch1
1250 srl %o3, 1, %o4
1251 wr %o3, 0x0, %wim
1252 st %g0, [%g6 + TI_UWINMASK]
1253 4:
1254 wr %o5, 0x0, %psr
1255 WRITE_PAUSE
1256 3:
1257 retl
1258 st %g0, [%g6 + TI_W_SAVED]
1259
1260 .align 4
1261 .globl restore_current
1262 restore_current:
1263 LOAD_CURRENT(g6, o0)
1264 retl
1265 nop
1266
1267 #ifdef CONFIG_PCIC_PCI
1268 #include <asm/pcic.h>
1269
1270 .align 4
1271 .globl linux_trap_ipi15_pcic
1272 linux_trap_ipi15_pcic:
1273 rd %wim, %l3
1274 SAVE_ALL
1275
1276 /*
1277 * First deactivate NMI
1278 * or we cannot drop ET, cannot get w
1279 * The busy loop is necessary because
1280 * sometimes does not go away quickly
1281 */
1282 sethi %hi(pcic_regs), %o1
1283 ld [%o1 + %lo(pcic_regs)], %o2
1284
1285 ! Get pending status for printouts la
1286 ld [%o2 + PCI_SYS_INT_PENDING],
1287
1288 mov PCI_SYS_INT_PENDING_CLEAR_ALL
1289 stb %o1, [%o2 + PCI_SYS_INT_PENDI
1290 1:
1291 ld [%o2 + PCI_SYS_INT_PENDING],
1292 andcc %o1, ((PCI_SYS_INT_PENDING_PI
1293 bne 1b
1294 nop
1295
1296 or %l0, PSR_PIL, %l4
1297 wr %l4, 0x0, %psr
1298 WRITE_PAUSE
1299 wr %l4, PSR_ET, %psr
1300 WRITE_PAUSE
1301
1302 call pcic_nmi
1303 add %sp, STACKFRAME_SZ, %o1 ! str
1304 RESTORE_ALL
1305
1306 .globl pcic_nmi_trap_patch
1307 pcic_nmi_trap_patch:
1308 sethi %hi(linux_trap_ipi15_pcic), %
1309 jmpl %l3 + %lo(linux_trap_ipi15_pc
1310 rd %psr, %l0
1311 .word 0
1312
1313 #endif /* CONFIG_PCIC_PCI */
1314
1315 .globl flushw_all
1316 flushw_all:
1317 save %sp, -0x40, %sp
1318 save %sp, -0x40, %sp
1319 save %sp, -0x40, %sp
1320 save %sp, -0x40, %sp
1321 save %sp, -0x40, %sp
1322 save %sp, -0x40, %sp
1323 save %sp, -0x40, %sp
1324 restore
1325 restore
1326 restore
1327 restore
1328 restore
1329 restore
1330 ret
1331 restore
1332
1333 #ifdef CONFIG_SMP
1334 ENTRY(hard_smp_processor_id)
1335 661: rd %tbr, %g1
1336 srl %g1, 12, %o0
1337 and %o0, 3, %o0
1338 .section .cpuid_patch, "ax"
1339 /* Instruction location. */
1340 .word 661b
1341 /* SUN4D implementation. */
1342 lda [%g0] ASI_M_VIKING_TM
1343 nop
1344 nop
1345 /* LEON implementation. */
1346 rd %asr17, %o0
1347 srl %o0, 0x1c, %o0
1348 nop
1349 .previous
1350 retl
1351 nop
1352 ENDPROC(hard_smp_processor_id)
1353 #endif
1354
1355 /* End of entry.S */
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