1 /* SPDX-License-Identifier: GPL-2.0-or-later * !! 1 /* SPDX-License-Identifier: GPL-2.0-or-later
2 /* !! 2 * -*- mode: asm -*-
3 * Linux/PA-RISC Project (http://www.parisc-li !! 3 *
>> 4 * linux/arch/m68k/kernel/entry.S
>> 5 *
>> 6 * Copyright (C) 1991, 1992 Linus Torvalds
>> 7 *
>> 8 * Linux/m68k support by Hamish Macdonald
>> 9 *
>> 10 * 68060 fixes by Jesper Skov
4 * 11 *
5 * kernel entry points (interruptions, system <<
6 * Copyright (C) 1999,2000 Philipp Rumpf <<
7 * Copyright (C) 1999 SuSE GmbH Nuernberg <<
8 * Copyright (C) 2000 Hewlett-Packard (John M <<
9 * Copyright (C) 1999 Hewlett-Packard (Frank <<
10 */ 12 */
11 13
12 #include <asm/asm-offsets.h> <<
13 <<
14 /* we have the following possibilities to act <<
15 * - handle in assembly and use shadowed regi <<
16 * - save registers to kernel stack and handl <<
17 <<
18 <<
19 #include <asm/psw.h> <<
20 #include <asm/cache.h> /* for L1_CACH <<
21 #include <asm/assembly.h> /* for LDREG/S <<
22 #include <asm/signal.h> <<
23 #include <asm/unistd.h> <<
24 #include <asm/ldcw.h> <<
25 #include <asm/traps.h> <<
26 #include <asm/thread_info.h> <<
27 #include <asm/alternative.h> <<
28 #include <asm/spinlock_types.h> <<
29 <<
30 #include <linux/linkage.h> <<
31 #include <linux/pgtable.h> <<
32 <<
33 #ifdef CONFIG_64BIT <<
34 .level 2.0w <<
35 #else <<
36 .level 2.0 <<
37 #endif <<
38 <<
39 /* 14 /*
40 * We need seven instructions after a TLB inse !! 15 * entry.S contains the system-call and fault low-level handling routines.
41 * The PA8800/PA8900 processors are an excepti !! 16 * This also contains the timer-interrupt handler, as well as all interrupts
42 * The RFI changes both IAOQ_Back and IAOQ_Fro !! 17 * and faults that can result in a task-switch.
>> 18 *
>> 19 * NOTE: This code handles signal-recognition, which happens every time
>> 20 * after a timer-interrupt and after each system call.
>> 21 *
43 */ 22 */
44 #ifdef CONFIG_64BIT <<
45 #define NUM_PIPELINE_INSNS 12 <<
46 #else <<
47 #define NUM_PIPELINE_INSNS 7 <<
48 #endif <<
49 <<
50 /* Insert num nops */ <<
51 .macro insert_nops num <<
52 .rept \num <<
53 nop <<
54 .endr <<
55 .endm <<
56 <<
57 /* Get aligned page_table_lock address <<
58 .macro get_ptl reg <<
59 mfctl %cr28,\reg <<
60 .endm <<
61 <<
62 /* space_to_prot macro creates a prot <<
63 <<
64 #if (SPACEID_SHIFT) == 0 <<
65 .macro space_to_prot spc prot <<
66 depd,z \spc,62,31,\prot <<
67 .endm <<
68 #else <<
69 .macro space_to_prot spc prot <<
70 extrd,u \spc,(64 - (SPACEID_SHIFT)),32 <<
71 .endm <<
72 #endif <<
73 /* <<
74 * The "get_stack" macros are responsi <<
75 * kernel stack value. <<
76 * <<
77 * If sr7 == 0 <<
78 * Already using a kernel sta <<
79 * get_stack_use_r30 macro to <<
80 * on the stack, and store re <<
81 * else <<
82 * Need to set up a kernel st <<
83 * get_stack_use_cr30 macro t <<
84 * to the pt_regs structure c <<
85 * task pointer pointed to by <<
86 * pointer from the task stru <<
87 * <<
88 * Note that we use shadowed registers <<
89 * we can save %r26 and %r29. %r26 is <<
90 * %r8 (a shadowed register) which tem <<
91 * either the fault type ("code") or t <<
92 * to use a non-shadowed register to c <<
93 * the rfir in virt_map. We use %r26 s <<
94 * up being passed as the argument to <<
95 * or handle_interruption. %r29 is use <<
96 * the register save area, and once ag <<
97 * be a non-shadowed register so that <<
98 */ <<
99 <<
100 .macro get_stack_use_cr30 <<
101 <<
102 /* we save the registers in the task s <<
103 <<
104 copy %r30, %r17 <<
105 mfctl %cr30, %r1 <<
106 tophys %r1,%r9 /* task_struct <<
107 LDREG TASK_STACK(%r9),%r30 <<
108 ldo PT_SZ_ALGN(%r30),%r30 <<
109 mtsp %r0,%sr7 /* clear sr7 a <<
110 mtsp %r16,%sr3 <<
111 ldo TASK_REGS(%r9),%r9 <<
112 STREG %r17,PT_GR30(%r9) <<
113 STREG %r29,PT_GR29(%r9) <<
114 STREG %r26,PT_GR26(%r9) <<
115 STREG %r16,PT_SR7(%r9) <<
116 copy %r9,%r29 <<
117 .endm <<
118 <<
119 .macro get_stack_use_r30 <<
120 <<
121 /* we put a struct pt_regs on the stac <<
122 <<
123 tophys %r30,%r9 <<
124 copy %r30,%r1 <<
125 ldo PT_SZ_ALGN(%r30),%r30 <<
126 STREG %r1,PT_GR30(%r9) <<
127 STREG %r29,PT_GR29(%r9) <<
128 STREG %r26,PT_GR26(%r9) <<
129 STREG %r16,PT_SR7(%r9) <<
130 copy %r9,%r29 <<
131 .endm <<
132 <<
133 .macro rest_stack <<
134 LDREG PT_GR1(%r29), %r1 <<
135 LDREG PT_GR30(%r29),%r30 <<
136 LDREG PT_GR29(%r29),%r29 <<
137 .endm <<
138 <<
139 /* default interruption handler <<
140 * (calls traps.c:handle_interruption) <<
141 .macro def code <<
142 b intr_save <<
143 ldi \code, %r8 <<
144 .align 32 <<
145 .endm <<
146 <<
147 /* Interrupt interruption handler <<
148 * (calls irq.c:do_cpu_irq_mask) */ <<
149 .macro extint code <<
150 b intr_extint <<
151 mfsp %sr7,%r16 <<
152 .align 32 <<
153 .endm <<
154 <<
155 .import os_hpmc, code <<
156 <<
157 /* HPMC handler */ <<
158 .macro hpmc code <<
159 nop /* must be a N <<
160 load32 PA(os_hpmc), %r3 <<
161 bv,n 0(%r3) <<
162 nop <<
163 .word 0 /* checksum (w <<
164 .word 0 /* address of <<
165 .word 0 /* length of h <<
166 .endm <<
167 <<
168 /* <<
169 * Performance Note: Instructions will <<
170 * this part of the code later on, onc <<
171 * that the tlb miss handlers are clos <<
172 */ <<
173 <<
174 /* Register definitions for tlb miss h <<
175 <<
176 va = r8 /* virtual address for <<
177 spc = r24 /* space for which the <<
178 <<
179 #ifndef CONFIG_64BIT <<
180 <<
181 /* <<
182 * itlb miss interruption handler (par <<
183 */ <<
184 <<
185 .macro itlb_11 code <<
186 <<
187 mfctl %pcsq, spc <<
188 b itlb_miss_11 <<
189 mfctl %pcoq, va <<
190 <<
191 .align 32 <<
192 .endm <<
193 #endif <<
194 <<
195 /* <<
196 * itlb miss interruption handler (par <<
197 */ <<
198 <<
199 .macro itlb_20 code <<
200 mfctl %pcsq, spc <<
201 #ifdef CONFIG_64BIT <<
202 b itlb_miss_20w <<
203 #else <<
204 b itlb_miss_20 <<
205 #endif <<
206 mfctl %pcoq, va <<
207 <<
208 .align 32 <<
209 .endm <<
210 <<
211 #ifndef CONFIG_64BIT <<
212 /* <<
213 * naitlb miss interruption handler (p <<
214 */ <<
215 <<
216 .macro naitlb_11 code <<
217 <<
218 mfctl %isr,spc <<
219 b naitlb_miss_11 <<
220 mfctl %ior,va <<
221 <<
222 .align 32 <<
223 .endm <<
224 #endif <<
225 <<
226 /* <<
227 * naitlb miss interruption handler (p <<
228 */ <<
229 23
230 .macro naitlb_20 code !! 24 /*
231 !! 25 * 12/03/96 Jes: Currently we only support m68k single-cpu systems, so
232 mfctl %isr,spc !! 26 * all pointers that used to be 'current' are now entry
233 #ifdef CONFIG_64BIT !! 27 * number 0 in the 'current_set' list.
234 b naitlb_miss_20w !! 28 *
235 #else !! 29 * 6/05/00 RZ: addedd writeback completion after return from sighandler
236 b naitlb_miss_20 !! 30 * for 68040
237 #endif !! 31 */
238 mfctl %ior,va <<
239 <<
240 .align 32 <<
241 .endm <<
242 <<
243 #ifndef CONFIG_64BIT <<
244 /* <<
245 * dtlb miss interruption handler (par <<
246 */ <<
247 <<
248 .macro dtlb_11 code <<
249 <<
250 mfctl %isr, spc <<
251 b dtlb_miss_11 <<
252 mfctl %ior, va <<
253 <<
254 .align 32 <<
255 .endm <<
256 #endif <<
257 <<
258 /* <<
259 * dtlb miss interruption handler (par <<
260 */ <<
261 <<
262 .macro dtlb_20 code <<
263 <<
264 mfctl %isr, spc <<
265 #ifdef CONFIG_64BIT <<
266 b dtlb_miss_20w <<
267 #else <<
268 b dtlb_miss_20 <<
269 #endif <<
270 mfctl %ior, va <<
271 <<
272 .align 32 <<
273 .endm <<
274 <<
275 #ifndef CONFIG_64BIT <<
276 /* nadtlb miss interruption handler (p <<
277 <<
278 .macro nadtlb_11 code <<
279 <<
280 mfctl %isr,spc <<
281 b nadtlb_miss_11 <<
282 mfctl %ior,va <<
283 <<
284 .align 32 <<
285 .endm <<
286 #endif <<
287 <<
288 /* nadtlb miss interruption handler (p <<
289 <<
290 .macro nadtlb_20 code <<
291 <<
292 mfctl %isr,spc <<
293 #ifdef CONFIG_64BIT <<
294 b nadtlb_miss_20w <<
295 #else <<
296 b nadtlb_miss_20 <<
297 #endif <<
298 mfctl %ior,va <<
299 <<
300 .align 32 <<
301 .endm <<
302 <<
303 #ifndef CONFIG_64BIT <<
304 /* <<
305 * dirty bit trap interruption handler <<
306 */ <<
307 <<
308 .macro dbit_11 code <<
309 <<
310 mfctl %isr,spc <<
311 b dbit_trap_11 <<
312 mfctl %ior,va <<
313 <<
314 .align 32 <<
315 .endm <<
316 #endif <<
317 <<
318 /* <<
319 * dirty bit trap interruption handler <<
320 */ <<
321 <<
322 .macro dbit_20 code <<
323 <<
324 mfctl %isr,spc <<
325 #ifdef CONFIG_64BIT <<
326 b dbit_trap_20w <<
327 #else <<
328 b dbit_trap_20 <<
329 #endif <<
330 mfctl %ior,va <<
331 <<
332 .align 32 <<
333 .endm <<
334 <<
335 /* In LP64, the space contains part of <<
336 * fault. We have to extract this and <<
337 * zeroing the corresponding bits in t <<
338 .macro space_adjust spc,va <<
339 #ifdef CONFIG_64BIT <<
340 extrd,u \spc,63,SPACEID_SHIFT, <<
341 depd %r0,63,SPACEID_SHIFT,\ <<
342 depd \tmp,31,SPACEID_SHIFT, <<
343 #endif <<
344 .endm <<
345 <<
346 .import swapper_pg_dir,code <<
347 <<
348 /* Get the pgd. For faults on space z <<
349 * is simply swapper_pg_dir. For user <<
350 * pgd is stored in %cr25 */ <<
351 .macro get_pgd spc,re <<
352 ldil L%PA(swapper_pg_dir),\ <<
353 ldo R%PA(swapper_pg_dir)(\ <<
354 or,COND(=) %r0,\spc,%r0 <<
355 mfctl %cr25,\reg <<
356 .endm <<
357 <<
358 /* <<
359 space_check(spc,tmp,fault) <<
360 <<
361 spc - The space we saw the fau <<
362 tmp - The place to store the c <<
363 fault - Function to call on fa <<
364 <<
365 Only allow faults on different <<
366 currently active one if we're <<
367 <<
368 */ <<
369 .macro space_check spc,tm <<
370 mfsp %sr7,\tmp <<
371 /* check against %r0 which is same val <<
372 or,COND(<>) %r0,\spc,%r0 /* use <<
373 * as <<
374 * che <<
375 copy \spc,\tmp <<
376 or,COND(=) %r0,\tmp,%r0 /* nul <<
377 cmpb,COND(<>),n \tmp,\spc,\fault <<
378 .endm <<
379 <<
380 /* Look up a PTE in a 2-Level scheme ( <<
381 * level if the entry isn't present <<
382 * <<
383 * NOTE: we use ldw even for LP64, sin <<
384 * can address up to 1TB <<
385 */ <<
386 .macro L2_ptep pmd,pte,index, <<
387 #if CONFIG_PGTABLE_LEVELS == 3 <<
388 extru_safe \va,31-ASM_PMD_SHIFT,A <<
389 #else <<
390 extru_safe \va,31-ASM_PGDIR_SHIFT <<
391 #endif <<
392 dep %r0,31,PAGE_SHIFT,\pmd <<
393 #if CONFIG_PGTABLE_LEVELS < 3 <<
394 copy %r0,\pte <<
395 #endif <<
396 ldw,s \index(\pmd),\pmd <<
397 bb,>=,n \pmd,_PxD_PRESENT_BIT, <<
398 dep %r0,31,PxD_FLAG_SHIFT, <<
399 SHLREG \pmd,PxD_VALUE_SHIFT,\ <<
400 extru_safe \va,31-PAGE_SHIFT,ASM_ <<
401 dep %r0,31,PAGE_SHIFT,\pmd <<
402 shladd \index,BITS_PER_PTE_EN <<
403 .endm <<
404 <<
405 /* Look up PTE in a 3-Level scheme. */ <<
406 .macro L3_ptep pgd,pte,index, <<
407 #if CONFIG_PGTABLE_LEVELS == 3 <<
408 copy %r0,\pte <<
409 extrd,u \va,63-ASM_PGDIR_SHIFT <<
410 ldw,s \index(\pgd),\pgd <<
411 bb,>=,n \pgd,_PxD_PRESENT_BIT, <<
412 shld \pgd,PxD_VALUE_SHIFT,\ <<
413 #endif <<
414 L2_ptep \pgd,\pte,\index,\va,\ <<
415 .endm <<
416 <<
417 /* Acquire page_table_lock and check p <<
418 .macro ptl_lock spc,pt <<
419 #ifdef CONFIG_TLB_PTLOCK <<
420 98: cmpib,COND(=),n 0,\spc,2f <<
421 get_ptl \tmp <<
422 1: LDCW 0(\tmp),\tmp1 <<
423 cmpib,COND(=) 0,\tmp1,1b <<
424 nop <<
425 LDREG 0(\ptp),\pte <<
426 bb,<,n \pte,_PAGE_PRESENT_BIT <<
427 b \fault <<
428 stw \tmp1,0(\tmp) <<
429 99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, <<
430 #endif <<
431 2: LDREG 0(\ptp),\pte <<
432 bb,>=,n \pte,_PAGE_PRESENT_BIT <<
433 3: <<
434 .endm <<
435 <<
436 /* Release page_table_lock if for user <<
437 store to ensure all prior accesses <<
438 releasing the lock. Note stw may no <<
439 provide one extra nop when CONFIG_T <<
440 .macro ptl_unlock spc,tm <<
441 #ifdef CONFIG_TLB_PTLOCK <<
442 98: get_ptl \tmp <<
443 ldi __ARCH_SPIN_LOCK_UNLOC <<
444 or,COND(=) %r0,\spc,%r0 <<
445 stw,ma \tmp2,0(\tmp) <<
446 99: ALTERNATIVE(98b, 99b, ALT_COND_NO_SMP, <<
447 insert_nops NUM_PIPELINE_INSNS - 4 <<
448 #else <<
449 insert_nops NUM_PIPELINE_INSNS - 1 <<
450 #endif <<
451 .endm <<
452 <<
453 /* Set the _PAGE_ACCESSED bit of the P <<
454 * don't needlessly dirty the cache li <<
455 .macro update_accessed ptp,pt <<
456 ldi _PAGE_ACCESSED,\tmp1 <<
457 or \tmp1,\pte,\tmp <<
458 and,COND(<>) \tmp1,\pte,%r0 <<
459 STREG \tmp,0(\ptp) <<
460 .endm <<
461 <<
462 /* Set the dirty bit (and accessed bit <<
463 * clever, this is only used from the <<
464 .macro update_dirty ptp,pt <<
465 ldi _PAGE_ACCESSED|_PAGE_D <<
466 or \tmp,\pte,\pte <<
467 STREG \pte,0(\ptp) <<
468 .endm <<
469 <<
470 /* We have (depending on the page size <<
471 * - 38 to 52-bit Physical Page Number <<
472 * - 12 to 26-bit page offset <<
473 */ <<
474 /* bitshift difference between a PFN ( <<
475 * to a CPU TLB 4k PFN (4k => 12 bits <<
476 #define PAGE_ADD_SHIFT (PAGE_ <<
477 #define PAGE_ADD_HUGE_SHIFT (REAL_ <<
478 #define PFN_START_BIT (63-ASM_PFN_PT <<
479 <<
480 /* Drop prot bits and convert to page <<
481 .macro convert_for_tlb_insert <<
482 #ifdef CONFIG_HUGETLB_PAGE <<
483 copy \pte,\tmp <<
484 extrd,u \tmp,PFN_START_BIT,PFN <<
485 <<
486 depdi _PAGE_SIZE_ENCODING_DE <<
487 (63-58)+PAGE_A <<
488 extrd,u,*= \tmp,_PAGE_HPAGE_BIT+3 <<
489 depdi _HUGE_PAGE_SIZE_ENCODI <<
490 (63-58)+PAGE_A <<
491 #else /* Huge pages disabled */ <<
492 extrd,u \pte,PFN_START_BIT,PFN <<
493 depdi _PAGE_SIZE_ENCODING_DE <<
494 (63-58)+PAGE_A <<
495 #endif <<
496 .endm <<
497 <<
498 /* Convert the pte and prot to tlb ins <<
499 * this happens is quite subtle, read <<
500 .macro make_insert_tlb spc,pt <<
501 space_to_prot \spc \prot /* c <<
502 /* The following is the real subtlety. <<
503 * T <-> _PAGE_REFTRAP <<
504 * D <-> _PAGE_DIRTY <<
505 * B <-> _PAGE_DMB (memory break) <<
506 * <<
507 * Then incredible subtlety: The acces <<
508 * _PAGE_GATEWAY, _PAGE_EXEC and _PAGE <<
509 * See 3-14 of the parisc 2.0 manual <<
510 * <<
511 * Finally, _PAGE_READ goes in the top <<
512 * trigger an access rights trap in us <<
513 * tries to read an unreadable page */ <<
514 #if _PAGE_SPECIAL_BIT == _PAGE_DMB_BIT <<
515 /* need to drop DMB bit, as it's used <<
516 depi 0,_PAGE_SPECIAL_BIT,1, <<
517 #endif <<
518 depd \pte,8,7,\prot <<
519 <<
520 /* PAGE_USER indicates the page can be <<
521 * so deposit X1|11 to PL1|PL2 (rememb <<
522 * contains _PAGE_READ) */ <<
523 extrd,u,*= \pte,_PAGE_USER_BIT+32 <<
524 depdi 7,11,3,\prot <<
525 /* If we're a gateway page, drop PL2 b <<
526 * to kernel privilege (so we can exec <<
527 * Any privilege promotion page always <<
528 extrd,u,*= \pte,_PAGE_GATEWAY_BIT <<
529 depd %r0,11,2,\prot /* If <<
530 <<
531 /* Enforce uncacheable pages. <<
532 * This should ONLY be use for MMIO on <<
533 * Memory/DMA is cache coherent on all <<
534 * (that means T-class is NOT supporte <<
535 * on most of those machines only hand <<
536 */ <<
537 extrd,u,*= \pte,_PAGE_NO_CACHE_BI <<
538 depdi 1,12,1,\prot <<
539 <<
540 /* Drop prot bits and convert to page <<
541 convert_for_tlb_insert20 \pte \tmp <<
542 .endm <<
543 <<
544 /* Identical macro to make_insert_tlb <<
545 * makes the tlb entry for the differe <<
546 * insertion instructions */ <<
547 .macro make_insert_tlb_11 <<
548 #if _PAGE_SPECIAL_BIT == _PAGE_DMB_BIT <<
549 /* need to drop DMB bit, as it's used <<
550 depi 0,_PAGE_SPECIAL_BIT,1, <<
551 #endif <<
552 zdep \spc,30,15,\prot <<
553 dep \pte,8,7,\prot <<
554 extru,= \pte,_PAGE_NO_CACHE_BI <<
555 depi 1,12,1,\prot <<
556 extru,= \pte,_PAGE_USER_BIT,1, <<
557 depi 7,11,3,\prot /* Set <<
558 extru,= \pte,_PAGE_GATEWAY_BIT <<
559 depi 0,11,2,\prot /* If <<
560 <<
561 /* Get rid of prot bits and convert to <<
562 <<
563 depi 0,31,ASM_PFN_PTE_SHIFT <<
564 SHRREG \pte,(ASM_PFN_PTE_SHIF <<
565 .endm <<
566 <<
567 /* This is for ILP32 PA2.0 only. The <<
568 * to extend into I/O space if the add <<
569 * so we extend the f's into the top w <<
570 * this case */ <<
571 .macro f_extend pte,tm <<
572 extrd,s \pte,42,4,\tmp <<
573 addi,<> 1,\tmp,%r0 <<
574 extrd,s \pte,63,25,\pte <<
575 .endm <<
576 <<
577 /* The alias region is comprised of a <<
578 * aligned to 8 MB. It is used to clea <<
579 * using kernel virtual addresses cong <<
580 * virtual address. <<
581 * <<
582 * To use the alias page, you set %r26 <<
583 * entry (identifying the physical pag <<
584 * the from tlb entry (or nothing if o <<
585 * clear_user_page_asm) */ <<
586 .macro do_alias spc,tm <<
587 cmpib,COND(<>),n 0,\spc,\fault <<
588 ldil L%(TMPALIAS_MAP_START) <<
589 copy \va,\tmp1 <<
590 depi_safe 0,31,TMPALIAS_SIZE_BIT <<
591 cmpb,COND(<>),n \tmp,\tmp1,\fault <<
592 mfctl %cr19,\tmp /* iir <<
593 /* get the opcode (first six bits) int <<
594 extrw,u \tmp,5,6,\tmp <<
595 /* <<
596 * Only setting the T bit prevents dat <<
597 * Setting access rights to zero preve <<
598 * <<
599 * Note subtlety here: _PAGE_GATEWAY, <<
600 * to type field and _PAGE_READ goes t <<
601 */ <<
602 ldi (_PAGE_REFTRAP|_PAGE_R <<
603 /* <<
604 * so if the opcode is one (i.e. this <<
605 * instruction) nullify the next load <<
606 * Otherwise this is a normal data ope <<
607 */ <<
608 cmpiclr,= 0x01,\tmp,%r0 <<
609 ldi (_PAGE_DIRTY|_PAGE_REA <<
610 .ifc \patype,20 <<
611 depd,z \prot,8,7,\prot <<
612 .else <<
613 .ifc \patype,11 <<
614 depw,z \prot,8,7,\prot <<
615 .else <<
616 .error "undefined PA type to do_alias" <<
617 .endif <<
618 .endif <<
619 /* <<
620 * OK, it is in the temp alias region, <<
621 * Check "subtle" note in pacache.S re <<
622 */ <<
623 extrw,u,= \va,31-TMPALIAS_SIZE_B <<
624 or,COND(tr) %r23,%r0,\pte <<
625 or %r26,%r0,\pte <<
626 <<
627 /* convert phys addr in \pte (from r23 <<
628 SHRREG \pte,PAGE_SHIFT+PAGE_A <<
629 depi_safe _PAGE_SIZE_ENCODING_DE <<
630 .endm <<
631 <<
632 <<
633 /* <<
634 * Fault_vectors are architecturally r <<
635 * boundary <<
636 */ <<
637 <<
638 .section .text.hot <<
639 .align 2048 <<
640 <<
641 ENTRY(fault_vector_20) <<
642 /* First vector is invalid (0) */ <<
643 .ascii "cows can fly" <<
644 .byte 0 <<
645 .align 32 <<
646 <<
647 hpmc 1 <<
648 def 2 <<
649 def 3 <<
650 extint 4 <<
651 def 5 <<
652 itlb_20 PARISC_ITLB_TRAP <<
653 def 7 <<
654 def 8 <<
655 def 9 <<
656 def 10 <<
657 def 11 <<
658 def 12 <<
659 def 13 <<
660 def 14 <<
661 dtlb_20 15 <<
662 naitlb_20 16 <<
663 nadtlb_20 17 <<
664 def 18 <<
665 def 19 <<
666 dbit_20 20 <<
667 def 21 <<
668 def 22 <<
669 def 23 <<
670 def 24 <<
671 def 25 <<
672 def 26 <<
673 def 27 <<
674 def 28 <<
675 def 29 <<
676 def 30 <<
677 def 31 <<
678 END(fault_vector_20) <<
679 <<
680 #ifndef CONFIG_64BIT <<
681 <<
682 .align 2048 <<
683 <<
684 ENTRY(fault_vector_11) <<
685 /* First vector is invalid (0) */ <<
686 .ascii "cows can fly" <<
687 .byte 0 <<
688 .align 32 <<
689 <<
690 hpmc 1 <<
691 def 2 <<
692 def 3 <<
693 extint 4 <<
694 def 5 <<
695 itlb_11 PARISC_ITLB_TRAP <<
696 def 7 <<
697 def 8 <<
698 def 9 <<
699 def 10 <<
700 def 11 <<
701 def 12 <<
702 def 13 <<
703 def 14 <<
704 dtlb_11 15 <<
705 naitlb_11 16 <<
706 nadtlb_11 17 <<
707 def 18 <<
708 def 19 <<
709 dbit_11 20 <<
710 def 21 <<
711 def 22 <<
712 def 23 <<
713 def 24 <<
714 def 25 <<
715 def 26 <<
716 def 27 <<
717 def 28 <<
718 def 29 <<
719 def 30 <<
720 def 31 <<
721 END(fault_vector_11) <<
722 <<
723 #endif <<
724 /* Fault vector is separately protecte <<
725 .align PAGE_SIZE <<
726 <<
727 .import handle_interruption,co <<
728 .import do_cpu_irq_mask,code <<
729 <<
730 /* <<
731 * Child Returns here <<
732 * <<
733 * copy_thread moved args into task sa <<
734 */ <<
735 <<
736 ENTRY(ret_from_kernel_thread) <<
737 /* Call schedule_tail first though */ <<
738 BL schedule_tail, %r2 <<
739 nop <<
740 <<
741 mfctl %cr30,%r1 /* task_struct <<
742 LDREG TASK_PT_GR25(%r1), %r26 <<
743 #ifdef CONFIG_64BIT <<
744 LDREG TASK_PT_GR27(%r1), %r27 <<
745 #endif <<
746 LDREG TASK_PT_GR26(%r1), %r1 <<
747 ble 0(%sr7, %r1) <<
748 copy %r31, %r2 <<
749 b finish_child_return <<
750 nop <<
751 END(ret_from_kernel_thread) <<
752 <<
753 <<
754 /* <<
755 * struct task_struct *_switch_to(stru <<
756 * struct task_struct *next) <<
757 * <<
758 * switch kernel stacks and return pre <<
759 ENTRY_CFI(_switch_to) <<
760 STREG %r2, -RP_OFFSET(%r30) <<
761 <<
762 callee_save_float <<
763 callee_save <<
764 <<
765 load32 _switch_to_ret, %r2 <<
766 <<
767 STREG %r2, TASK_PT_KPC(%r26) <<
768 LDREG TASK_PT_KPC(%r25), %r2 <<
769 <<
770 STREG %r30, TASK_PT_KSP(%r26) <<
771 LDREG TASK_PT_KSP(%r25), %r30 <<
772 bv %r0(%r2) <<
773 mtctl %r25,%cr30 <<
774 <<
775 ENTRY(_switch_to_ret) <<
776 mtctl %r0, %cr0 /* Nee <<
777 callee_rest <<
778 callee_rest_float <<
779 <<
780 LDREG -RP_OFFSET(%r30), %r2 <<
781 bv %r0(%r2) <<
782 copy %r26, %r28 <<
783 ENDPROC_CFI(_switch_to) <<
784 <<
785 /* <<
786 * Common rfi return path for interrup <<
787 * sys_rt_sigreturn (sometimes). The <<
788 * return via this path if the signal <<
789 * was running; if the process was blo <<
790 * normal syscall_exit path is used. <<
791 * proceses exit via intr_restore. <<
792 * <<
793 * XXX If any syscalls that change a p <<
794 * this way, then we will need to copy <<
795 * adjust IASQ[0..1]. <<
796 * <<
797 */ <<
798 <<
799 .align PAGE_SIZE <<
800 <<
801 ENTRY_CFI(syscall_exit_rfi) <<
802 mfctl %cr30,%r16 /* tas <<
803 ldo TASK_REGS(%r16),%r16 <<
804 /* Force iaoq to userspace, as the use <<
805 * context via sigcontext. Also Filter <<
806 */ <<
807 LDREG PT_IAOQ0(%r16),%r19 <<
808 depi PRIV_USER,31,2,%r19 <<
809 STREG %r19,PT_IAOQ0(%r16) <<
810 LDREG PT_IAOQ1(%r16),%r19 <<
811 depi PRIV_USER,31,2,%r19 <<
812 STREG %r19,PT_IAOQ1(%r16) <<
813 LDREG PT_PSW(%r16),%r19 <<
814 load32 USER_PSW_MASK,%r1 <<
815 #ifdef CONFIG_64BIT <<
816 load32 USER_PSW_HI_MASK,%r20 <<
817 depd %r20,31,32,%r1 <<
818 #endif <<
819 and %r19,%r1,%r19 /* Mask out bits <<
820 load32 USER_PSW,%r1 <<
821 or %r19,%r1,%r19 /* Make sure def <<
822 STREG %r19,PT_PSW(%r16) <<
823 <<
824 /* <<
825 * If we aren't being traced, we never <<
826 * (we don't store them in the sigcont <<
827 * to "proper" values now (otherwise w <<
828 * whatever was last stored in the tas <<
829 * be inconsistent if an interrupt occ <<
830 * page). Note that we may be "trashin <<
831 * them, but we don't support the user <<
832 */ <<
833 <<
834 STREG %r0,PT_SR2(%r16) <<
835 mfsp %sr3,%r19 <<
836 STREG %r19,PT_SR0(%r16) <<
837 STREG %r19,PT_SR1(%r16) <<
838 STREG %r19,PT_SR3(%r16) <<
839 STREG %r19,PT_SR4(%r16) <<
840 STREG %r19,PT_SR5(%r16) <<
841 STREG %r19,PT_SR6(%r16) <<
842 STREG %r19,PT_SR7(%r16) <<
843 <<
844 ENTRY(intr_return) <<
845 /* check for reschedule */ <<
846 mfctl %cr30,%r1 <<
847 LDREG TASK_TI_FLAGS(%r1),%r19 /* sch <<
848 bb,<,n %r19,31-TIF_NEED_RESCHED,intr_ <<
849 <<
850 .import do_notify_resume,code <<
851 intr_check_sig: <<
852 /* As above */ <<
853 mfctl %cr30,%r1 <<
854 LDREG TASK_TI_FLAGS(%r1),%r19 <<
855 ldi (_TIF_USER_WORK_MASK & ~_TIF_N <<
856 and,COND(<>) %r19, %r20, %r0 <<
857 b,n intr_restore /* skip past i <<
858 <<
859 /* This check is critical to having LW <<
860 * working. The IASQ is zero on the ga <<
861 * page and we cannot deliver any sign <<
862 * we get off the gateway page. <<
863 * <<
864 * Only do signals if we are returning <<
865 */ <<
866 LDREG PT_IASQ0(%r16), %r20 <<
867 cmpib,COND(=),n LINUX_GATEWAY_SPACE, % <<
868 LDREG PT_IASQ1(%r16), %r20 <<
869 cmpib,COND(=),n LINUX_GATEWAY_SPACE, % <<
870 <<
871 copy %r0, %r25 <<
872 #ifdef CONFIG_64BIT <<
873 ldo -16(%r30),%r29 <<
874 #endif <<
875 <<
876 /* NOTE: We need to enable interrupts <<
877 * signals. We used to do this earlier <<
878 * stack overflows. */ <<
879 ssm PSW_SM_I, %r0 <<
880 <<
881 BL do_notify_resume,%r2 <<
882 copy %r16, %r26 <<
883 <<
884 b,n intr_check_sig <<
885 <<
886 intr_restore: <<
887 copy %r16,%r29 <<
888 ldo PT_FR31(%r29),%r1 <<
889 rest_fp %r1 <<
890 rest_general %r29 <<
891 <<
892 /* inverse of virt_map */ <<
893 pcxt_ssm_bug <<
894 rsm PSW_SM_QUIET,%r0 <<
895 tophys_r1 %r29 <<
896 <<
897 /* Restore space id's and special cr's <<
898 * structure pointed to by r29 <<
899 */ <<
900 rest_specials %r29 <<
901 <<
902 /* IMPORTANT: rest_stack restores r29 <<
903 * It also restores r1 and r30. <<
904 */ <<
905 rest_stack <<
906 <<
907 rfi <<
908 nop <<
909 <<
910 #ifndef CONFIG_PREEMPTION <<
911 # define intr_do_preempt intr_restore <<
912 #endif /* !CONFIG_PREEMPTION */ <<
913 <<
914 .import schedule,code <<
915 intr_do_resched: <<
916 /* Only call schedule on return to use <<
917 * to kernel space, we may schedule if <<
918 * we jump back to intr_restore. <<
919 */ <<
920 LDREG PT_IASQ0(%r16), %r20 <<
921 cmpib,COND(=) 0, %r20, intr_do_preem <<
922 nop <<
923 LDREG PT_IASQ1(%r16), %r20 <<
924 cmpib,COND(=) 0, %r20, intr_do_preem <<
925 nop <<
926 <<
927 /* NOTE: We need to enable interrupts <<
928 * to do this earlier but it caused ke <<
929 ssm PSW_SM_I, %r0 <<
930 <<
931 #ifdef CONFIG_64BIT <<
932 ldo -16(%r30),%r29 /* Ref <<
933 #endif <<
934 <<
935 ldil L%intr_check_sig, %r2 <<
936 #ifndef CONFIG_64BIT <<
937 b schedule <<
938 #else <<
939 load32 schedule, %r20 <<
940 bv %r0(%r20) <<
941 #endif <<
942 ldo R%intr_check_sig(%r2), %r2 <<
943 <<
944 /* preempt the current task on returni <<
945 * mode from an interrupt, iff need_re <<
946 * and preempt_count is 0. otherwise, <<
947 * our merry way back to the current r <<
948 */ <<
949 #ifdef CONFIG_PREEMPTION <<
950 .import preempt_schedule_irq,code <<
951 intr_do_preempt: <<
952 rsm PSW_SM_I, %r0 /* dis <<
953 <<
954 /* current_thread_info()->preempt_coun <<
955 mfctl %cr30, %r1 <<
956 ldw TI_PRE_COUNT(%r1), %r19 <<
957 cmpib,<> 0, %r19, intr_restore <<
958 nop /* pre <<
959 <<
960 /* check if we interrupted a critical <<
961 LDREG PT_PSW(%r16), %r20 <<
962 bb,<,n %r20, 31 - PSW_SM_I, intr_rest <<
963 nop <<
964 <<
965 /* ssm PSW_SM_I done later in intr_res <<
966 #ifdef CONFIG_MLONGCALLS <<
967 ldil L%intr_restore, %r2 <<
968 load32 preempt_schedule_irq, %r1 <<
969 bv %r0(%r1) <<
970 ldo R%intr_restore(%r2), %r2 <<
971 #else <<
972 ldil L%intr_restore, %r1 <<
973 BL preempt_schedule_irq, %r2 <<
974 ldo R%intr_restore(%r1), %r2 <<
975 #endif <<
976 #endif /* CONFIG_PREEMPTION */ <<
977 <<
978 /* <<
979 * External interrupts. <<
980 */ <<
981 <<
982 intr_extint: <<
983 cmpib,COND(=),n 0,%r16,1f <<
984 <<
985 get_stack_use_cr30 <<
986 b,n 2f <<
987 <<
988 1: <<
989 get_stack_use_r30 <<
990 2: <<
991 save_specials %r29 <<
992 virt_map <<
993 save_general %r29 <<
994 <<
995 ldo PT_FR0(%r29), %r24 <<
996 save_fp %r24 <<
997 <<
998 loadgp <<
999 <<
1000 copy %r29, %r26 /* arg0 is pt <<
1001 copy %r29, %r16 /* save pt_re <<
1002 <<
1003 ldil L%intr_return, %r2 <<
1004 <<
1005 #ifdef CONFIG_64BIT <<
1006 ldo -16(%r30),%r29 /* Reference <<
1007 #endif <<
1008 <<
1009 b do_cpu_irq_mask <<
1010 ldo R%intr_return(%r2), %r2 /* re <<
1011 ENDPROC_CFI(syscall_exit_rfi) <<
1012 32
>> 33 #include <linux/linkage.h>
>> 34 #include <asm/errno.h>
>> 35 #include <asm/setup.h>
>> 36 #include <asm/traps.h>
>> 37 #include <asm/unistd.h>
>> 38 #include <asm/asm-offsets.h>
>> 39 #include <asm/entry.h>
1013 40
1014 /* Generic interruptions (illegal ins !! 41 .globl system_call, buserr, trap, resume
1015 !! 42 .globl sys_call_table
1016 ENTRY_CFI(intr_save) /* for os_hpm !! 43 .globl __sys_fork, __sys_clone, __sys_vfork
1017 mfsp %sr7,%r16 !! 44 .globl bad_interrupt
1018 cmpib,COND(=),n 0,%r16,1f !! 45 .globl auto_irqhandler_fixup
1019 get_stack_use_cr30 !! 46 .globl user_irqvec_fixup
1020 b 2f !! 47
1021 copy %r8,%r26 !! 48 .text
>> 49 ENTRY(__sys_fork)
>> 50 SAVE_SWITCH_STACK
>> 51 jbsr sys_fork
>> 52 lea %sp@(24),%sp
>> 53 rts
>> 54
>> 55 ENTRY(__sys_clone)
>> 56 SAVE_SWITCH_STACK
>> 57 pea %sp@(SWITCH_STACK_SIZE)
>> 58 jbsr m68k_clone
>> 59 lea %sp@(28),%sp
>> 60 rts
>> 61
>> 62 ENTRY(__sys_vfork)
>> 63 SAVE_SWITCH_STACK
>> 64 jbsr sys_vfork
>> 65 lea %sp@(24),%sp
>> 66 rts
>> 67
>> 68 ENTRY(__sys_clone3)
>> 69 SAVE_SWITCH_STACK
>> 70 pea %sp@(SWITCH_STACK_SIZE)
>> 71 jbsr m68k_clone3
>> 72 lea %sp@(28),%sp
>> 73 rts
>> 74
>> 75 ENTRY(sys_sigreturn)
>> 76 SAVE_SWITCH_STACK
>> 77 movel %sp,%a1 | switch_stack pointer
>> 78 lea %sp@(SWITCH_STACK_SIZE),%a0 | pt_regs pointer
>> 79 lea %sp@(-84),%sp | leave a gap
>> 80 movel %a1,%sp@-
>> 81 movel %a0,%sp@-
>> 82 jbsr do_sigreturn
>> 83 jra 1f | shared with rt_sigreturn()
>> 84
>> 85 ENTRY(sys_rt_sigreturn)
>> 86 SAVE_SWITCH_STACK
>> 87 movel %sp,%a1 | switch_stack pointer
>> 88 lea %sp@(SWITCH_STACK_SIZE),%a0 | pt_regs pointer
>> 89 lea %sp@(-84),%sp | leave a gap
>> 90 movel %a1,%sp@-
>> 91 movel %a0,%sp@-
>> 92 | stack contents:
>> 93 | [original pt_regs address] [original switch_stack address]
>> 94 | [gap] [switch_stack] [pt_regs] [exception frame]
>> 95 jbsr do_rt_sigreturn
1022 96
1023 1: 97 1:
1024 get_stack_use_r30 !! 98 | stack contents now:
1025 copy %r8,%r26 !! 99 | [original pt_regs address] [original switch_stack address]
1026 !! 100 | [unused part of the gap] [moved switch_stack] [moved pt_regs]
1027 2: !! 101 | [replacement exception frame]
1028 save_specials %r29 !! 102 | return value of do_{rt_,}sigreturn() points to moved switch_stack.
1029 !! 103
1030 /* If this trap is a itlb miss, skip !! 104 movel %d0,%sp | discard the leftover junk
1031 cmpib,COND(=),n PARISC_ITLB_TR !! 105 RESTORE_SWITCH_STACK
1032 !! 106 | stack contents now is just [syscall return address] [pt_regs] [frame]
1033 !! 107 | return pt_regs.d0
1034 mfctl %isr, %r16 !! 108 movel %sp@(PT_OFF_D0+4),%d0
1035 nop /* serialize mfctl on !! 109 rts
1036 mfctl %ior, %r17 !! 110
1037 !! 111 ENTRY(buserr)
1038 !! 112 SAVE_ALL_INT
1039 #ifdef CONFIG_64BIT !! 113 GET_CURRENT(%d0)
1040 /* !! 114 movel %sp,%sp@- | stack frame pointer argument
1041 * If the interrupted code was runnin !! 115 jbsr buserr_c
1042 * clear the b bits (bits 0 & 1) in t !! 116 addql #4,%sp
1043 * save_specials left ipsw value in r !! 117 jra ret_from_exception
1044 */ !! 118
1045 extrd,u,*<> %r8,PSW_W_BIT,1,%r0 !! 119 ENTRY(trap)
1046 depdi 0,1,2,%r17 !! 120 SAVE_ALL_INT
1047 !! 121 GET_CURRENT(%d0)
1048 /* adjust isr/ior: get high bits from !! 122 movel %sp,%sp@- | stack frame pointer argument
1049 space_adjust %r16,%r17,%r1 !! 123 jbsr trap_c
1050 #endif !! 124 addql #4,%sp
1051 STREG %r16, PT_ISR(%r29) !! 125 jra ret_from_exception
1052 STREG %r17, PT_IOR(%r29) !! 126
1053 !! 127 | After a fork we jump here directly from resume,
1054 #if defined(CONFIG_64BIT) !! 128 | so that %d1 contains the previous task
1055 b,n intr_save2 !! 129 | schedule_tail now used regardless of CONFIG_SMP
1056 !! 130 ENTRY(ret_from_fork)
1057 skip_save_ior: !! 131 movel %d1,%sp@-
1058 /* We have a itlb miss, and when exec !! 132 jsr schedule_tail
1059 * need to adjust iasq/iaoq here in t !! 133 addql #4,%sp
1060 * above. !! 134 jra ret_from_exception
1061 */ <<
1062 bb,COND(>=),n %r8,PSW_W_BIT,intr_sa <<
1063 LDREG PT_IASQ0(%r29), %r16 <<
1064 LDREG PT_IAOQ0(%r29), %r17 <<
1065 /* adjust iasq/iaoq */ <<
1066 space_adjust %r16,%r17,%r1 <<
1067 STREG %r16, PT_IASQ0(%r29) <<
1068 STREG %r17, PT_IAOQ0(%r29) <<
1069 #else <<
1070 skip_save_ior: <<
1071 #endif <<
1072 <<
1073 intr_save2: <<
1074 virt_map <<
1075 save_general %r29 <<
1076 <<
1077 ldo PT_FR0(%r29), %r25 <<
1078 save_fp %r25 <<
1079 <<
1080 loadgp <<
1081 <<
1082 copy %r29, %r25 /* ar <<
1083 #ifdef CONFIG_64BIT <<
1084 ldo -16(%r30),%r29 /* Re <<
1085 #endif <<
1086 <<
1087 ldil L%intr_check_sig, %r2 <<
1088 copy %r25, %r16 /* sa <<
1089 <<
1090 b handle_interruption <<
1091 ldo R%intr_check_sig(%r2) <<
1092 ENDPROC_CFI(intr_save) <<
1093 <<
1094 <<
1095 /* <<
1096 * Note for all tlb miss handlers: <<
1097 * <<
1098 * cr24 contains a pointer to the ker <<
1099 * page directory. <<
1100 * <<
1101 * cr25 contains a pointer to the cur <<
1102 * space page directory. <<
1103 * <<
1104 * sr3 will contain the space id of t <<
1105 * of the current running thread whil <<
1106 * running in the kernel. <<
1107 */ <<
1108 <<
1109 /* <<
1110 * register number allocations. Note <<
1111 * in the shadowed registers <<
1112 */ <<
1113 <<
1114 t0 = r1 /* temporary register <<
1115 va = r8 /* virtual address fo <<
1116 t1 = r9 /* temporary register <<
1117 pte = r16 /* pte/phys page # */ <<
1118 prot = r17 /* prot bits */ <<
1119 spc = r24 /* space for which th <<
1120 ptp = r25 /* page directory/pag <<
1121 <<
1122 #ifdef CONFIG_64BIT <<
1123 <<
1124 dtlb_miss_20w: <<
1125 space_adjust spc,va,t0 <<
1126 get_pgd spc,ptp <<
1127 space_check spc,t0,dtlb_fault <<
1128 <<
1129 L3_ptep ptp,pte,t0,va,dtlb_ch <<
1130 <<
1131 ptl_lock spc,ptp,pte,t0,t1,dtl <<
1132 update_accessed ptp,pte,t0,t1 <<
1133 135
1134 make_insert_tlb spc,pte,prot,t1 !! 136 ENTRY(ret_from_kernel_thread)
1135 !! 137 | a3 contains the kernel thread payload, d7 - its argument
1136 idtlbt pte,prot !! 138 movel %d1,%sp@-
1137 !! 139 jsr schedule_tail
1138 ptl_unlock spc,t0,t1 !! 140 movel %d7,(%sp)
1139 rfir !! 141 jsr %a3@
1140 nop !! 142 addql #4,%sp
1141 !! 143 jra ret_from_exception
1142 dtlb_check_alias_20w: !! 144
1143 do_alias spc,t0,t1,va,pte,prot !! 145 #if defined(CONFIG_COLDFIRE) || !defined(CONFIG_MMU)
1144 !! 146
1145 idtlbt pte,prot !! 147 #ifdef TRAP_DBG_INTERRUPT
1146 !! 148
1147 insert_nops NUM_PIPELINE_INSNS - !! 149 .globl dbginterrupt
1148 rfir !! 150 ENTRY(dbginterrupt)
1149 nop !! 151 SAVE_ALL_INT
1150 !! 152 GET_CURRENT(%d0)
1151 nadtlb_miss_20w: !! 153 movel %sp,%sp@- /* stack frame pointer argument */
1152 space_adjust spc,va,t0 !! 154 jsr dbginterrupt_c
1153 get_pgd spc,ptp !! 155 addql #4,%sp
1154 space_check spc,t0,nadtlb_fault !! 156 jra ret_from_exception
1155 !! 157 #endif
1156 L3_ptep ptp,pte,t0,va,nadtlb_ !! 158
1157 !! 159 ENTRY(reschedule)
1158 ptl_lock spc,ptp,pte,t0,t1,nad !! 160 /* save top of frame */
1159 update_accessed ptp,pte,t0,t1 !! 161 pea %sp@
1160 !! 162 jbsr set_esp0
1161 make_insert_tlb spc,pte,prot,t1 !! 163 addql #4,%sp
1162 !! 164 pea ret_from_exception
1163 idtlbt pte,prot !! 165 jmp schedule
1164 !! 166
1165 ptl_unlock spc,t0,t1 !! 167 ENTRY(ret_from_user_signal)
1166 rfir !! 168 moveq #__NR_sigreturn,%d0
1167 nop !! 169 trap #0
1168 !! 170
1169 nadtlb_check_alias_20w: !! 171 ENTRY(ret_from_user_rt_signal)
1170 do_alias spc,t0,t1,va,pte,prot !! 172 movel #__NR_rt_sigreturn,%d0
1171 !! 173 trap #0
1172 idtlbt pte,prot !! 174
1173 !! 175 #else
1174 insert_nops NUM_PIPELINE_INSNS - !! 176
1175 rfir !! 177 do_trace_entry:
1176 nop !! 178 movel #-ENOSYS,%sp@(PT_OFF_D0)| needed for strace
1177 !! 179 subql #4,%sp
1178 #else !! 180 SAVE_SWITCH_STACK
1179 !! 181 jbsr syscall_trace_enter
1180 dtlb_miss_11: !! 182 RESTORE_SWITCH_STACK
1181 get_pgd spc,ptp !! 183 addql #4,%sp
1182 !! 184 addql #1,%d0 | optimization for cmpil #-1,%d0
1183 space_check spc,t0,dtlb_fault !! 185 jeq ret_from_syscall
1184 !! 186 movel %sp@(PT_OFF_ORIG_D0),%d0
1185 L2_ptep ptp,pte,t0,va,dtlb_ch !! 187 cmpl #NR_syscalls,%d0
1186 !! 188 jcs syscall
1187 ptl_lock spc,ptp,pte,t0,t1,dtl !! 189 jra ret_from_syscall
1188 update_accessed ptp,pte,t0,t1 !! 190 badsys:
1189 !! 191 movel #-ENOSYS,%sp@(PT_OFF_D0)
1190 make_insert_tlb_11 spc,pte,prot !! 192 jra ret_from_syscall
1191 !! 193
1192 mfsp %sr1,t1 /* Save sr1 !! 194 do_trace_exit:
1193 mtsp spc,%sr1 !! 195 subql #4,%sp
1194 !! 196 SAVE_SWITCH_STACK
1195 idtlba pte,(%sr1,va) !! 197 jbsr syscall_trace_leave
1196 idtlbp prot,(%sr1,va) !! 198 RESTORE_SWITCH_STACK
1197 !! 199 addql #4,%sp
1198 mtsp t1, %sr1 /* Re !! 200 jra .Lret_from_exception
1199 !! 201
1200 ptl_unlock spc,t0,t1 !! 202 ENTRY(system_call)
1201 rfir !! 203 SAVE_ALL_SYS
1202 nop !! 204
1203 !! 205 GET_CURRENT(%d1)
1204 dtlb_check_alias_11: !! 206 movel %d1,%a1
1205 do_alias spc,t0,t1,va,pte,prot !! 207
1206 !! 208 | save top of frame
1207 idtlba pte,(va) !! 209 movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0)
1208 idtlbp prot,(va) !! 210
1209 !! 211 | syscall trace?
1210 insert_nops NUM_PIPELINE_INSNS - !! 212 tstb %a1@(TINFO_FLAGS+2)
1211 rfir !! 213 jmi do_trace_entry
1212 nop !! 214 | seccomp filter active?
1213 !! 215 btst #5,%a1@(TINFO_FLAGS+2)
1214 nadtlb_miss_11: !! 216 bnes do_trace_entry
1215 get_pgd spc,ptp !! 217 cmpl #NR_syscalls,%d0
1216 !! 218 jcc badsys
1217 space_check spc,t0,nadtlb_fault !! 219 syscall:
1218 !! 220 jbsr @(sys_call_table,%d0:l:4)@(0)
1219 L2_ptep ptp,pte,t0,va,nadtlb_ !! 221 movel %d0,%sp@(PT_OFF_D0) | save the return value
1220 !! 222 ret_from_syscall:
1221 ptl_lock spc,ptp,pte,t0,t1,nad !! 223 |oriw #0x0700,%sr
1222 update_accessed ptp,pte,t0,t1 !! 224 movel %curptr@(TASK_STACK),%a1
1223 !! 225 movew %a1@(TINFO_FLAGS+2),%d0
1224 make_insert_tlb_11 spc,pte,prot !! 226 jne syscall_exit_work
1225 !! 227 1: RESTORE_ALL
1226 mfsp %sr1,t1 /* Save sr1 !! 228
1227 mtsp spc,%sr1 !! 229 syscall_exit_work:
1228 !! 230 btst #5,%sp@(PT_OFF_SR) | check if returning to kernel
1229 idtlba pte,(%sr1,va) !! 231 bnes 1b | if so, skip resched, signals
1230 idtlbp prot,(%sr1,va) !! 232 lslw #1,%d0
1231 !! 233 jcs do_trace_exit
1232 mtsp t1, %sr1 /* Re !! 234 jmi do_delayed_trace
1233 !! 235 lslw #8,%d0
1234 ptl_unlock spc,t0,t1 !! 236 jne do_signal_return
1235 rfir !! 237 pea resume_userspace
1236 nop !! 238 jra schedule
1237 !! 239
1238 nadtlb_check_alias_11: !! 240
1239 do_alias spc,t0,t1,va,pte,prot !! 241 ENTRY(ret_from_exception)
1240 !! 242 .Lret_from_exception:
1241 idtlba pte,(va) !! 243 btst #5,%sp@(PT_OFF_SR) | check if returning to kernel
1242 idtlbp prot,(va) !! 244 bnes 1f | if so, skip resched, signals
1243 !! 245 | only allow interrupts when we are really the last one on the
1244 insert_nops NUM_PIPELINE_INSNS - !! 246 | kernel stack, otherwise stack overflow can occur during
1245 rfir !! 247 | heavy interrupt load
1246 nop !! 248 andw #ALLOWINT,%sr
1247 !! 249
1248 dtlb_miss_20: !! 250 resume_userspace:
1249 space_adjust spc,va,t0 !! 251 movel %curptr@(TASK_STACK),%a1
1250 get_pgd spc,ptp !! 252 moveb %a1@(TINFO_FLAGS+3),%d0
1251 space_check spc,t0,dtlb_fault !! 253 jne exit_work
1252 !! 254 1: RESTORE_ALL
1253 L2_ptep ptp,pte,t0,va,dtlb_ch !! 255
1254 !! 256 exit_work:
1255 ptl_lock spc,ptp,pte,t0,t1,dtl !! 257 | save top of frame
1256 update_accessed ptp,pte,t0,t1 !! 258 movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0)
1257 !! 259 lslb #1,%d0
1258 make_insert_tlb spc,pte,prot,t1 !! 260 jne do_signal_return
1259 !! 261 pea resume_userspace
1260 f_extend pte,t1 !! 262 jra schedule
1261 !! 263
1262 idtlbt pte,prot !! 264
1263 !! 265 do_signal_return:
1264 ptl_unlock spc,t0,t1 !! 266 |andw #ALLOWINT,%sr
1265 rfir !! 267 subql #4,%sp | dummy return address
1266 nop !! 268 SAVE_SWITCH_STACK
1267 !! 269 pea %sp@(SWITCH_STACK_SIZE)
1268 dtlb_check_alias_20: !! 270 bsrl do_notify_resume
1269 do_alias spc,t0,t1,va,pte,prot !! 271 addql #4,%sp
1270 !! 272 RESTORE_SWITCH_STACK
1271 idtlbt pte,prot !! 273 addql #4,%sp
1272 !! 274 jbra resume_userspace
1273 insert_nops NUM_PIPELINE_INSNS - !! 275
1274 rfir !! 276 do_delayed_trace:
1275 nop !! 277 bclr #7,%sp@(PT_OFF_SR) | clear trace bit in SR
1276 !! 278 pea 1 | send SIGTRAP
1277 nadtlb_miss_20: !! 279 movel %curptr,%sp@-
1278 get_pgd spc,ptp !! 280 pea LSIGTRAP
1279 !! 281 jbsr send_sig
1280 space_check spc,t0,nadtlb_fault !! 282 addql #8,%sp
1281 !! 283 addql #4,%sp
1282 L2_ptep ptp,pte,t0,va,nadtlb_ !! 284 jbra resume_userspace
1283 !! 285
1284 ptl_lock spc,ptp,pte,t0,t1,nad !! 286
1285 update_accessed ptp,pte,t0,t1 !! 287 /* This is the main interrupt handler for autovector interrupts */
1286 !! 288
1287 make_insert_tlb spc,pte,prot,t1 !! 289 ENTRY(auto_inthandler)
1288 !! 290 SAVE_ALL_INT
1289 f_extend pte,t1 !! 291 GET_CURRENT(%d0)
1290 !! 292 | put exception # in d0
1291 idtlbt pte,prot !! 293 bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0
1292 !! 294 subw #VEC_SPUR,%d0
1293 ptl_unlock spc,t0,t1 !! 295
1294 rfir !! 296 movel %sp,%sp@-
1295 nop !! 297 movel %d0,%sp@- | put vector # on stack
1296 !! 298 auto_irqhandler_fixup = . + 2
1297 nadtlb_check_alias_20: !! 299 jsr do_IRQ | process the IRQ
1298 do_alias spc,t0,t1,va,pte,prot !! 300 addql #8,%sp | pop parameters off stack
1299 !! 301 jra ret_from_exception
1300 idtlbt pte,prot !! 302
1301 !! 303 /* Handler for user defined interrupt vectors */
1302 insert_nops NUM_PIPELINE_INSNS - !! 304
1303 rfir !! 305 ENTRY(user_inthandler)
1304 nop !! 306 SAVE_ALL_INT
1305 !! 307 GET_CURRENT(%d0)
1306 #endif !! 308 | put exception # in d0
1307 !! 309 bfextu %sp@(PT_OFF_FORMATVEC){#4,#10},%d0
1308 nadtlb_emulate: !! 310 user_irqvec_fixup = . + 2
1309 !! 311 subw #VEC_USER,%d0
1310 /* !! 312
1311 * Non-access misses can be caused by !! 313 movel %sp,%sp@-
1312 * probei instructions. The kernel no !! 314 movel %d0,%sp@- | put vector # on stack
1313 * Use of lpa and probe instructions !! 315 jsr do_IRQ | process the IRQ
1314 * with shadow registers, we defer ev !! 316 addql #8,%sp | pop parameters off stack
1315 */ !! 317 jra ret_from_exception
1316 b,n nadtlb_fault !! 318
1317 !! 319 /* Handler for uninitialized and spurious interrupts */
1318 #ifdef CONFIG_64BIT !! 320
1319 itlb_miss_20w: !! 321 ENTRY(bad_inthandler)
1320 !! 322 SAVE_ALL_INT
1321 /* !! 323 GET_CURRENT(%d0)
1322 * I miss is a little different, sinc !! 324
1323 * on the gateway page which is in th !! 325 movel %sp,%sp@-
1324 */ !! 326 jsr handle_badint
1325 !! 327 addql #4,%sp
1326 space_adjust spc,va,t0 !! 328 jra ret_from_exception
1327 get_pgd spc,ptp !! 329
1328 space_check spc,t0,itlb_fault !! 330 resume:
1329 !! 331 /*
1330 L3_ptep ptp,pte,t0,va,itlb_fa !! 332 * Beware - when entering resume, prev (the current task) is
1331 !! 333 * in a0, next (the new task) is in a1,so don't change these
1332 ptl_lock spc,ptp,pte,t0,t1,itl !! 334 * registers until their contents are no longer needed.
1333 update_accessed ptp,pte,t0,t1 !! 335 */
1334 !! 336
1335 make_insert_tlb spc,pte,prot,t1 !! 337 /* save sr */
1336 !! 338 movew %sr,%a0@(TASK_THREAD+THREAD_SR)
1337 iitlbt pte,prot !! 339
1338 !! 340 /* save fs (sfc,%dfc) (may be pointing to kernel memory) */
1339 ptl_unlock spc,t0,t1 !! 341 movec %sfc,%d0
1340 rfir !! 342 movew %d0,%a0@(TASK_THREAD+THREAD_FC)
1341 nop !! 343
1342 !! 344 /* save usp */
1343 naitlb_miss_20w: !! 345 /* it is better to use a movel here instead of a movew 8*) */
1344 !! 346 movec %usp,%d0
1345 /* !! 347 movel %d0,%a0@(TASK_THREAD+THREAD_USP)
1346 * I miss is a little different, sinc !! 348
1347 * on the gateway page which is in th !! 349 /* save non-scratch registers on stack */
1348 */ !! 350 SAVE_SWITCH_STACK
1349 !! 351
1350 space_adjust spc,va,t0 !! 352 /* save current kernel stack pointer */
1351 get_pgd spc,ptp !! 353 movel %sp,%a0@(TASK_THREAD+THREAD_KSP)
1352 space_check spc,t0,naitlb_fault !! 354
1353 !! 355 /* save floating point context */
1354 L3_ptep ptp,pte,t0,va,naitlb_ !! 356 #ifndef CONFIG_M68KFPU_EMU_ONLY
1355 !! 357 #ifdef CONFIG_M68KFPU_EMU
1356 ptl_lock spc,ptp,pte,t0,t1,nai !! 358 tstl m68k_fputype
1357 update_accessed ptp,pte,t0,t1 !! 359 jeq 3f
1358 !! 360 #endif
1359 make_insert_tlb spc,pte,prot,t1 !! 361 fsave %a0@(TASK_THREAD+THREAD_FPSTATE)
1360 !! 362
1361 iitlbt pte,prot !! 363 #if defined(CONFIG_M68060)
1362 !! 364 #if !defined(CPU_M68060_ONLY)
1363 ptl_unlock spc,t0,t1 !! 365 btst #3,m68k_cputype+3
1364 rfir !! 366 beqs 1f
1365 nop !! 367 #endif
1366 !! 368 /* The 060 FPU keeps status in bits 15-8 of the first longword */
1367 naitlb_check_alias_20w: !! 369 tstb %a0@(TASK_THREAD+THREAD_FPSTATE+2)
1368 do_alias spc,t0,t1,va,pte,prot !! 370 jeq 3f
1369 !! 371 #if !defined(CPU_M68060_ONLY)
1370 iitlbt pte,prot !! 372 jra 2f
1371 !! 373 #endif
1372 insert_nops NUM_PIPELINE_INSNS - !! 374 #endif /* CONFIG_M68060 */
1373 rfir !! 375 #if !defined(CPU_M68060_ONLY)
1374 nop !! 376 1: tstb %a0@(TASK_THREAD+THREAD_FPSTATE)
1375 !! 377 jeq 3f
1376 #else <<
1377 <<
1378 itlb_miss_11: <<
1379 get_pgd spc,ptp <<
1380 <<
1381 space_check spc,t0,itlb_fault <<
1382 <<
1383 L2_ptep ptp,pte,t0,va,itlb_fa <<
1384 <<
1385 ptl_lock spc,ptp,pte,t0,t1,itl <<
1386 update_accessed ptp,pte,t0,t1 <<
1387 <<
1388 make_insert_tlb_11 spc,pte,prot <<
1389 <<
1390 mfsp %sr1,t1 /* Save sr1 <<
1391 mtsp spc,%sr1 <<
1392 <<
1393 iitlba pte,(%sr1,va) <<
1394 iitlbp prot,(%sr1,va) <<
1395 <<
1396 mtsp t1, %sr1 /* Re <<
1397 <<
1398 ptl_unlock spc,t0,t1 <<
1399 rfir <<
1400 nop <<
1401 <<
1402 naitlb_miss_11: <<
1403 get_pgd spc,ptp <<
1404 <<
1405 space_check spc,t0,naitlb_fault <<
1406 <<
1407 L2_ptep ptp,pte,t0,va,naitlb_ <<
1408 <<
1409 ptl_lock spc,ptp,pte,t0,t1,nai <<
1410 update_accessed ptp,pte,t0,t1 <<
1411 <<
1412 make_insert_tlb_11 spc,pte,prot <<
1413 <<
1414 mfsp %sr1,t1 /* Save sr1 <<
1415 mtsp spc,%sr1 <<
1416 <<
1417 iitlba pte,(%sr1,va) <<
1418 iitlbp prot,(%sr1,va) <<
1419 <<
1420 mtsp t1, %sr1 /* Re <<
1421 <<
1422 ptl_unlock spc,t0,t1 <<
1423 rfir <<
1424 nop <<
1425 <<
1426 naitlb_check_alias_11: <<
1427 do_alias spc,t0,t1,va,pte,prot <<
1428 <<
1429 iitlba pte,(%sr0, va) <<
1430 iitlbp prot,(%sr0, va) <<
1431 <<
1432 insert_nops NUM_PIPELINE_INSNS - <<
1433 rfir <<
1434 nop <<
1435 <<
1436 <<
1437 itlb_miss_20: <<
1438 get_pgd spc,ptp <<
1439 <<
1440 space_check spc,t0,itlb_fault <<
1441 <<
1442 L2_ptep ptp,pte,t0,va,itlb_fa <<
1443 <<
1444 ptl_lock spc,ptp,pte,t0,t1,itl <<
1445 update_accessed ptp,pte,t0,t1 <<
1446 <<
1447 make_insert_tlb spc,pte,prot,t1 <<
1448 <<
1449 f_extend pte,t1 <<
1450 <<
1451 iitlbt pte,prot <<
1452 <<
1453 ptl_unlock spc,t0,t1 <<
1454 rfir <<
1455 nop <<
1456 <<
1457 naitlb_miss_20: <<
1458 get_pgd spc,ptp <<
1459 <<
1460 space_check spc,t0,naitlb_fault <<
1461 <<
1462 L2_ptep ptp,pte,t0,va,naitlb_ <<
1463 <<
1464 ptl_lock spc,ptp,pte,t0,t1,nai <<
1465 update_accessed ptp,pte,t0,t1 <<
1466 <<
1467 make_insert_tlb spc,pte,prot,t1 <<
1468 <<
1469 f_extend pte,t1 <<
1470 <<
1471 iitlbt pte,prot <<
1472 <<
1473 ptl_unlock spc,t0,t1 <<
1474 rfir <<
1475 nop <<
1476 <<
1477 naitlb_check_alias_20: <<
1478 do_alias spc,t0,t1,va,pte,prot <<
1479 <<
1480 iitlbt pte,prot <<
1481 <<
1482 insert_nops NUM_PIPELINE_INSNS - <<
1483 rfir <<
1484 nop <<
1485 <<
1486 #endif <<
1487 <<
1488 #ifdef CONFIG_64BIT <<
1489 <<
1490 dbit_trap_20w: <<
1491 space_adjust spc,va,t0 <<
1492 get_pgd spc,ptp <<
1493 space_check spc,t0,dbit_fault <<
1494 <<
1495 L3_ptep ptp,pte,t0,va,dbit_fa <<
1496 <<
1497 ptl_lock spc,ptp,pte,t0,t1,dbi <<
1498 update_dirty ptp,pte,t1 <<
1499 <<
1500 make_insert_tlb spc,pte,prot,t1 <<
1501 <<
1502 idtlbt pte,prot <<
1503 <<
1504 ptl_unlock spc,t0,t1 <<
1505 rfir <<
1506 nop <<
1507 #else <<
1508 <<
1509 dbit_trap_11: <<
1510 <<
1511 get_pgd spc,ptp <<
1512 <<
1513 space_check spc,t0,dbit_fault <<
1514 <<
1515 L2_ptep ptp,pte,t0,va,dbit_fa <<
1516 <<
1517 ptl_lock spc,ptp,pte,t0,t1,dbi <<
1518 update_dirty ptp,pte,t1 <<
1519 <<
1520 make_insert_tlb_11 spc,pte,prot <<
1521 <<
1522 mfsp %sr1,t1 /* Save sr1 <<
1523 mtsp spc,%sr1 <<
1524 <<
1525 idtlba pte,(%sr1,va) <<
1526 idtlbp prot,(%sr1,va) <<
1527 <<
1528 mtsp t1, %sr1 /* Resto <<
1529 <<
1530 ptl_unlock spc,t0,t1 <<
1531 rfir <<
1532 nop <<
1533 <<
1534 dbit_trap_20: <<
1535 get_pgd spc,ptp <<
1536 <<
1537 space_check spc,t0,dbit_fault <<
1538 <<
1539 L2_ptep ptp,pte,t0,va,dbit_fa <<
1540 <<
1541 ptl_lock spc,ptp,pte,t0,t1,dbi <<
1542 update_dirty ptp,pte,t1 <<
1543 <<
1544 make_insert_tlb spc,pte,prot,t1 <<
1545 <<
1546 f_extend pte,t1 <<
1547 <<
1548 idtlbt pte,prot <<
1549 <<
1550 ptl_unlock spc,t0,t1 <<
1551 rfir <<
1552 nop <<
1553 #endif <<
1554 <<
1555 .import handle_interruption,code <<
1556 <<
1557 kernel_bad_space: <<
1558 b intr_save <<
1559 ldi 31,%r8 /* Use an unu <<
1560 <<
1561 dbit_fault: <<
1562 b intr_save <<
1563 ldi 20,%r8 <<
1564 <<
1565 itlb_fault: <<
1566 b intr_save <<
1567 ldi PARISC_ITLB_TRAP,%r8 <<
1568 <<
1569 nadtlb_fault: <<
1570 b intr_save <<
1571 ldi 17,%r8 <<
1572 <<
1573 naitlb_fault: <<
1574 b intr_save <<
1575 ldi 16,%r8 <<
1576 <<
1577 dtlb_fault: <<
1578 b intr_save <<
1579 ldi 15,%r8 <<
1580 <<
1581 /* Register saving semantics for syst <<
1582 <<
1583 %r1 clobbered by syste <<
1584 %r2 saved in PT_REGS b <<
1585 %r3 - %r18 preserved by C cod <<
1586 %r19 - %r20 saved in PT_REGS b <<
1587 %r21 - %r22 non-standard sysca <<
1588 stored in kernel s <<
1589 %r23 - %r26 arg3-arg0, saved i <<
1590 %r27 - %r30 saved in PT_REGS b <<
1591 %r31 syscall return poi <<
1592 */ <<
1593 <<
1594 /* Floating point registers (FIXME: w <<
1595 <<
1596 %fr0 - %fr3 status/exception, <<
1597 %fr4 - %fr7 arguments <<
1598 %fr8 - %fr11 not preserved by C <<
1599 %fr12 - %fr21 preserved by C cod <<
1600 %fr22 - %fr31 not preserved by C <<
1601 */ <<
1602 <<
1603 .macro reg_save regs <<
1604 STREG %r3, PT_GR3(\regs) <<
1605 STREG %r4, PT_GR4(\regs) <<
1606 STREG %r5, PT_GR5(\regs) <<
1607 STREG %r6, PT_GR6(\regs) <<
1608 STREG %r7, PT_GR7(\regs) <<
1609 STREG %r8, PT_GR8(\regs) <<
1610 STREG %r9, PT_GR9(\regs) <<
1611 STREG %r10,PT_GR10(\regs) <<
1612 STREG %r11,PT_GR11(\regs) <<
1613 STREG %r12,PT_GR12(\regs) <<
1614 STREG %r13,PT_GR13(\regs) <<
1615 STREG %r14,PT_GR14(\regs) <<
1616 STREG %r15,PT_GR15(\regs) <<
1617 STREG %r16,PT_GR16(\regs) <<
1618 STREG %r17,PT_GR17(\regs) <<
1619 STREG %r18,PT_GR18(\regs) <<
1620 .endm <<
1621 <<
1622 .macro reg_restore regs <<
1623 LDREG PT_GR3(\regs), %r3 <<
1624 LDREG PT_GR4(\regs), %r4 <<
1625 LDREG PT_GR5(\regs), %r5 <<
1626 LDREG PT_GR6(\regs), %r6 <<
1627 LDREG PT_GR7(\regs), %r7 <<
1628 LDREG PT_GR8(\regs), %r8 <<
1629 LDREG PT_GR9(\regs), %r9 <<
1630 LDREG PT_GR10(\regs),%r10 <<
1631 LDREG PT_GR11(\regs),%r11 <<
1632 LDREG PT_GR12(\regs),%r12 <<
1633 LDREG PT_GR13(\regs),%r13 <<
1634 LDREG PT_GR14(\regs),%r14 <<
1635 LDREG PT_GR15(\regs),%r15 <<
1636 LDREG PT_GR16(\regs),%r16 <<
1637 LDREG PT_GR17(\regs),%r17 <<
1638 LDREG PT_GR18(\regs),%r18 <<
1639 .endm <<
1640 <<
1641 .macro fork_like name <<
1642 ENTRY_CFI(sys_\name\()_wrapper) <<
1643 mfctl %cr30,%r1 <<
1644 ldo TASK_REGS(%r1),%r1 <<
1645 reg_save %r1 <<
1646 mfctl %cr27, %r28 <<
1647 ldil L%sys_\name, %r31 <<
1648 be R%sys_\name(%sr4,%r31) <<
1649 STREG %r28, PT_CR27(%r1) <<
1650 ENDPROC_CFI(sys_\name\()_wrapper) <<
1651 .endm <<
1652 <<
1653 fork_like clone <<
1654 fork_like clone3 <<
1655 fork_like fork <<
1656 fork_like vfork <<
1657 <<
1658 /* Set the return value for the child <<
1659 ENTRY(child_return) <<
1660 BL schedule_tail, %r2 <<
1661 nop <<
1662 finish_child_return: <<
1663 mfctl %cr30,%r1 <<
1664 ldo TASK_REGS(%r1),%r1 /* g <<
1665 <<
1666 LDREG PT_CR27(%r1), %r3 <<
1667 mtctl %r3, %cr27 <<
1668 reg_restore %r1 <<
1669 b syscall_exit <<
1670 copy %r0,%r28 <<
1671 END(child_return) <<
1672 <<
1673 ENTRY_CFI(sys_rt_sigreturn_wrapper) <<
1674 mfctl %cr30,%r26 <<
1675 ldo TASK_REGS(%r26),%r26 /* ge <<
1676 /* Don't save regs, we are going to r <<
1677 STREG %r2, -RP_OFFSET(%r30) <<
1678 #ifdef CONFIG_64BIT <<
1679 ldo FRAME_SIZE(%r30), %r30 <<
1680 BL sys_rt_sigreturn,%r2 <<
1681 ldo -16(%r30),%r29 /* Re <<
1682 #else <<
1683 BL sys_rt_sigreturn,%r2 <<
1684 ldo FRAME_SIZE(%r30), %r30 <<
1685 #endif <<
1686 <<
1687 ldo -FRAME_SIZE(%r30), %r30 <<
1688 LDREG -RP_OFFSET(%r30), %r2 <<
1689 <<
1690 /* FIXME: I think we need to restore <<
1691 mfctl %cr30,%r1 <<
1692 ldo TASK_REGS(%r1),%r1 /* ge <<
1693 reg_restore %r1 <<
1694 <<
1695 /* If the signal was received while t <<
1696 * syscall, then r2 will take us to s <<
1697 * take us to syscall_exit_rfi and on <<
1698 */ <<
1699 bv %r0(%r2) <<
1700 LDREG PT_GR28(%r1),%r28 /* reload <<
1701 ENDPROC_CFI(sys_rt_sigreturn_wrapper) <<
1702 <<
1703 ENTRY(syscall_exit) <<
1704 /* NOTE: Not all syscalls exit this w <<
1705 * via syscall_exit_rfi if the signal <<
1706 * was running. <<
1707 */ <<
1708 <<
1709 /* save return value now */ <<
1710 mfctl %cr30, %r1 <<
1711 STREG %r28,TASK_PT_GR28(%r1) <<
1712 <<
1713 /* Seems to me that dp could be wrong <<
1714 * calling a module, and nothing got <<
1715 */ <<
1716 loadgp <<
1717 <<
1718 syscall_check_resched: <<
1719 <<
1720 /* check for reschedule */ <<
1721 mfctl %cr30,%r19 <<
1722 LDREG TASK_TI_FLAGS(%r19),%r19 <<
1723 bb,<,n %r19, 31-TIF_NEED_RESCHED, sy <<
1724 <<
1725 .import do_signal,code <<
1726 syscall_check_sig: <<
1727 mfctl %cr30,%r19 <<
1728 LDREG TASK_TI_FLAGS(%r19),%r19 <<
1729 ldi (_TIF_USER_WORK_MASK & ~_TIF_ <<
1730 and,COND(<>) %r19, %r26, %r0 <<
1731 b,n syscall_restore /* skip past <<
1732 <<
1733 syscall_do_signal: <<
1734 /* Save callee-save registers (for si <<
1735 * FIXME: After this point the proces <<
1736 * consistent with all the relevant s <<
1737 * before the syscall. We need to ve <<
1738 */ <<
1739 mfctl %cr30,%r1 <<
1740 ldo TASK_REGS(%r1), %r26 <<
1741 reg_save %r26 <<
1742 <<
1743 #ifdef CONFIG_64BIT <<
1744 ldo -16(%r30),%r29 <<
1745 #endif <<
1746 <<
1747 BL do_notify_resume,%r2 <<
1748 ldi 1, %r25 <<
1749 <<
1750 mfctl %cr30,%r1 <<
1751 ldo TASK_REGS(%r1), %r20 <<
1752 reg_restore %r20 <<
1753 <<
1754 b,n syscall_check_sig <<
1755 <<
1756 syscall_restore: <<
1757 mfctl %cr30,%r1 <<
1758 <<
1759 /* Are we being ptraced? */ <<
1760 LDREG TASK_TI_FLAGS(%r1),%r19 <<
1761 ldi _TIF_SINGLESTEP|_TIF_BLOCKSTE <<
1762 and,COND(=) %r19,%r2,%r0 <<
1763 b,n syscall_restore_rfi <<
1764 <<
1765 ldo TASK_PT_FR31(%r1),%r19 <<
1766 rest_fp %r19 <<
1767 <<
1768 LDREG TASK_PT_SAR(%r1),%r19 <<
1769 mtsar %r19 <<
1770 <<
1771 LDREG TASK_PT_GR2(%r1),%r2 <<
1772 LDREG TASK_PT_GR19(%r1),%r19 <<
1773 LDREG TASK_PT_GR20(%r1),%r20 <<
1774 LDREG TASK_PT_GR21(%r1),%r21 <<
1775 LDREG TASK_PT_GR22(%r1),%r22 <<
1776 LDREG TASK_PT_GR23(%r1),%r23 <<
1777 LDREG TASK_PT_GR24(%r1),%r24 <<
1778 LDREG TASK_PT_GR25(%r1),%r25 <<
1779 LDREG TASK_PT_GR26(%r1),%r26 <<
1780 LDREG TASK_PT_GR27(%r1),%r27 /* <<
1781 LDREG TASK_PT_GR28(%r1),%r28 /* <<
1782 LDREG TASK_PT_GR29(%r1),%r29 <<
1783 LDREG TASK_PT_GR31(%r1),%r31 /* <<
1784 <<
1785 /* NOTE: We use rsm/ssm pair to make <<
1786 LDREG TASK_PT_GR30(%r1),%r1 <<
1787 rsm PSW_SM_I, %r0 <<
1788 copy %r1,%r30 <<
1789 mfsp %sr3,%r1 <<
1790 mtsp %r1,%sr7 <<
1791 ssm PSW_SM_I, %r0 <<
1792 <<
1793 /* Set sr2 to zero for userspace sysc <<
1794 mtsp %r0,%sr2 <<
1795 mtsp %r1,%sr4 <<
1796 mtsp %r1,%sr5 <<
1797 mtsp %r1,%sr6 <<
1798 <<
1799 depi PRIV_USER,31,2,%r31 /* en <<
1800 <<
1801 #ifdef CONFIG_64BIT <<
1802 /* decide whether to reset the wide m <<
1803 * <<
1804 * For a syscall, the W bit is stored <<
1805 * of sp. Extract it and reset W if <<
1806 extrd,u,*<> %r30,63,1,%r1 <<
1807 rsm PSW_SM_W, %r0 <<
1808 /* now reset the lowest bit of sp if <<
1809 xor %r30,%r1,%r30 <<
1810 #endif <<
1811 be,n 0(%sr3,%r31) <<
1812 <<
1813 /* We have to return via an RFI, so t <<
1814 * appropriately. <<
1815 * This sets up pt_regs so we can ret <<
1816 * the most efficient way of doing th <<
1817 */ <<
1818 syscall_restore_rfi: <<
1819 ldo -1(%r0),%r2 <<
1820 mtctl %r2,%cr0 <<
1821 LDREG TASK_PT_PSW(%r1),%r2 <<
1822 ldi 0x0b,%r20 <<
1823 depi -1,13,1,%r20 <<
1824 <<
1825 /* The values of SINGLESTEP_BIT and B <<
1826 * set in thread_info.h and converted <<
1827 * numbers in asm-offsets.c */ <<
1828 <<
1829 /* if ((%r19.SINGLESTEP_BIT)) { %r20. <<
1830 extru,= %r19,TIF_SINGLESTEP_PA_BIT,1, <<
1831 depi -1,27,1,%r20 <<
1832 <<
1833 /* if ((%r19.BLOCKSTEP_BIT)) { %r20.7 <<
1834 extru,= %r19,TIF_BLOCKSTEP_PA_BIT,1,% <<
1835 depi -1,7,1,%r20 <<
1836 <<
1837 STREG %r20,TASK_PT_PSW(%r1) <<
1838 <<
1839 /* Always store space registers, sinc <<
1840 <<
1841 mfsp %sr3,%r25 <<
1842 STREG %r25,TASK_PT_SR3(%r1) <<
1843 STREG %r25,TASK_PT_SR4(%r1) <<
1844 STREG %r25,TASK_PT_SR5(%r1) <<
1845 STREG %r25,TASK_PT_SR6(%r1) <<
1846 STREG %r25,TASK_PT_SR7(%r1) <<
1847 STREG %r25,TASK_PT_IASQ0(%r1) <<
1848 STREG %r25,TASK_PT_IASQ1(%r1) <<
1849 <<
1850 /* XXX W bit??? */ <<
1851 /* Now if old D bit is clear, it mean <<
1852 * on syscall entry, so do that now. <<
1853 * calls, or if someone attached to u <<
1854 * We could make this more efficient <<
1855 * then we wouldn't be able to use th <<
1856 * It is only for traced processes an <<
1857 * an issue. <<
1858 */ <<
1859 bb,< %r2,30,pt_regs_ok <<
1860 ldo TASK_REGS(%r1),%r25 <<
1861 reg_save %r25 <<
1862 <<
1863 /* Save the current sr */ <<
1864 mfsp %sr0,%r2 <<
1865 STREG %r2,TASK_PT_SR0(%r1) <<
1866 <<
1867 /* Save the scratch sr */ <<
1868 mfsp %sr1,%r2 <<
1869 STREG %r2,TASK_PT_SR1(%r1) <<
1870 <<
1871 /* sr2 should be set to zero for user <<
1872 STREG %r0,TASK_PT_SR2(%r1) <<
1873 <<
1874 LDREG TASK_PT_GR31(%r1),%r2 <<
1875 depi PRIV_USER,31,2,%r2 /* en <<
1876 STREG %r2,TASK_PT_IAOQ0(%r1) <<
1877 ldo 4(%r2),%r2 <<
1878 STREG %r2,TASK_PT_IAOQ1(%r1) <<
1879 b intr_restore <<
1880 copy %r25,%r16 <<
1881 <<
1882 pt_regs_ok: <<
1883 LDREG TASK_PT_IAOQ0(%r1),%r2 <<
1884 depi PRIV_USER,31,2,%r2 /* en <<
1885 STREG %r2,TASK_PT_IAOQ0(%r1) <<
1886 LDREG TASK_PT_IAOQ1(%r1),%r2 <<
1887 depi PRIV_USER,31,2,%r2 <<
1888 STREG %r2,TASK_PT_IAOQ1(%r1) <<
1889 b intr_restore <<
1890 copy %r25,%r16 <<
1891 <<
1892 syscall_do_resched: <<
1893 load32 syscall_check_resched,%r2 /* <<
1894 load32 schedule,%r19 <<
1895 bv %r0(%r19) /* ju <<
1896 #ifdef CONFIG_64BIT <<
1897 ldo -16(%r30),%r29 /* Re <<
1898 #else <<
1899 nop <<
1900 #endif <<
1901 END(syscall_exit) <<
1902 <<
1903 <<
1904 #ifdef CONFIG_FUNCTION_TRACER <<
1905 <<
1906 .import ftrace_function_trampoline,co <<
1907 .align L1_CACHE_BYTES <<
1908 ENTRY_CFI(mcount, caller) <<
1909 _mcount: <<
1910 .export _mcount,data <<
1911 /* <<
1912 * The 64bit mcount() function pointe <<
1913 * first two are free. We optimize i <<
1914 * calling mcount(), and 2 instructio <<
1915 * have all on one L1 cacheline. <<
1916 */ <<
1917 ldi 0, %arg3 <<
1918 b ftrace_function_trampoline <<
1919 copy %r3, %arg2 /* caller ori <<
1920 ftrace_stub: <<
1921 .globl ftrace_stub <<
1922 .type ftrace_stub, @function <<
1923 #ifdef CONFIG_64BIT <<
1924 bve (%rp) <<
1925 #else <<
1926 bv %r0(%rp) <<
1927 #endif <<
1928 nop <<
1929 #ifdef CONFIG_64BIT <<
1930 .dword mcount <<
1931 .dword 0 /* code in head.S puts value <<
1932 #endif <<
1933 ENDPROC_CFI(mcount) <<
1934 <<
1935 #ifdef CONFIG_DYNAMIC_FTRACE <<
1936 <<
1937 #ifdef CONFIG_64BIT <<
1938 #define FTRACE_FRAME_SIZE (2*FRAME_SIZE) <<
1939 #else <<
1940 #define FTRACE_FRAME_SIZE FRAME_SIZE <<
1941 #endif <<
1942 ENTRY_CFI(ftrace_caller, caller,frame=FTRACE_ <<
1943 ftrace_caller: <<
1944 .global ftrace_caller <<
1945 <<
1946 STREG %r3, -FTRACE_FRAME_SIZE+1*REG <<
1947 ldo -FTRACE_FRAME_SIZE(%sp), %r3 <<
1948 STREG %rp, -RP_OFFSET(%r3) <<
1949 <<
1950 /* Offset 0 is already allocated for <<
1951 STREG %r23, 2*REG_SZ(%r3) <<
1952 STREG %r24, 3*REG_SZ(%r3) <<
1953 STREG %r25, 4*REG_SZ(%r3) <<
1954 STREG %r26, 5*REG_SZ(%r3) <<
1955 STREG %r28, 6*REG_SZ(%r3) <<
1956 STREG %r29, 7*REG_SZ(%r3) <<
1957 #ifdef CONFIG_64BIT <<
1958 STREG %r19, 8*REG_SZ(%r3) <<
1959 STREG %r20, 9*REG_SZ(%r3) <<
1960 STREG %r21, 10*REG_SZ(%r3) <<
1961 STREG %r22, 11*REG_SZ(%r3) <<
1962 STREG %r27, 12*REG_SZ(%r3) <<
1963 STREG %r31, 13*REG_SZ(%r3) <<
1964 loadgp <<
1965 ldo -16(%sp),%r29 <<
1966 #endif <<
1967 LDREG 0(%r3), %r25 <<
1968 copy %rp, %r26 <<
1969 ldo -8(%r25), %r25 <<
1970 ldi 0, %r23 /* no pt_regs <<
1971 b,l ftrace_function_trampoline, % <<
1972 copy %r3, %r24 <<
1973 <<
1974 LDREG -RP_OFFSET(%r3), %rp <<
1975 LDREG 2*REG_SZ(%r3), %r23 <<
1976 LDREG 3*REG_SZ(%r3), %r24 <<
1977 LDREG 4*REG_SZ(%r3), %r25 <<
1978 LDREG 5*REG_SZ(%r3), %r26 <<
1979 LDREG 6*REG_SZ(%r3), %r28 <<
1980 LDREG 7*REG_SZ(%r3), %r29 <<
1981 #ifdef CONFIG_64BIT <<
1982 LDREG 8*REG_SZ(%r3), %r19 <<
1983 LDREG 9*REG_SZ(%r3), %r20 <<
1984 LDREG 10*REG_SZ(%r3), %r21 <<
1985 LDREG 11*REG_SZ(%r3), %r22 <<
1986 LDREG 12*REG_SZ(%r3), %r27 <<
1987 LDREG 13*REG_SZ(%r3), %r31 <<
1988 #endif <<
1989 LDREG 1*REG_SZ(%r3), %r3 <<
1990 <<
1991 LDREGM -FTRACE_FRAME_SIZE(%sp), %r1 <<
1992 /* Adjust return point to jump back t <<
1993 ldo -4(%r1), %r1 <<
1994 bv,n (%r1) <<
1995 <<
1996 ENDPROC_CFI(ftrace_caller) <<
1997 <<
1998 #ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS <<
1999 ENTRY_CFI(ftrace_regs_caller,caller,frame=FTR <<
2000 CALLS,SAVE_RP,SAVE_SP) <<
2001 ftrace_regs_caller: <<
2002 .global ftrace_regs_caller <<
2003 <<
2004 ldo -FTRACE_FRAME_SIZE(%sp), %r1 <<
2005 STREG %rp, -RP_OFFSET(%r1) <<
2006 <<
2007 copy %sp, %r1 <<
2008 ldo PT_SZ_ALGN(%sp), %sp <<
2009 <<
2010 STREG %rp, PT_GR2(%r1) <<
2011 STREG %r3, PT_GR3(%r1) <<
2012 STREG %r4, PT_GR4(%r1) <<
2013 STREG %r5, PT_GR5(%r1) <<
2014 STREG %r6, PT_GR6(%r1) <<
2015 STREG %r7, PT_GR7(%r1) <<
2016 STREG %r8, PT_GR8(%r1) <<
2017 STREG %r9, PT_GR9(%r1) <<
2018 STREG %r10, PT_GR10(%r1) <<
2019 STREG %r11, PT_GR11(%r1) <<
2020 STREG %r12, PT_GR12(%r1) <<
2021 STREG %r13, PT_GR13(%r1) <<
2022 STREG %r14, PT_GR14(%r1) <<
2023 STREG %r15, PT_GR15(%r1) <<
2024 STREG %r16, PT_GR16(%r1) <<
2025 STREG %r17, PT_GR17(%r1) <<
2026 STREG %r18, PT_GR18(%r1) <<
2027 STREG %r19, PT_GR19(%r1) <<
2028 STREG %r20, PT_GR20(%r1) <<
2029 STREG %r21, PT_GR21(%r1) <<
2030 STREG %r22, PT_GR22(%r1) <<
2031 STREG %r23, PT_GR23(%r1) <<
2032 STREG %r24, PT_GR24(%r1) <<
2033 STREG %r25, PT_GR25(%r1) <<
2034 STREG %r26, PT_GR26(%r1) <<
2035 STREG %r27, PT_GR27(%r1) <<
2036 STREG %r28, PT_GR28(%r1) <<
2037 STREG %r29, PT_GR29(%r1) <<
2038 STREG %r30, PT_GR30(%r1) <<
2039 STREG %r31, PT_GR31(%r1) <<
2040 mfctl %cr11, %r26 <<
2041 STREG %r26, PT_SAR(%r1) <<
2042 <<
2043 copy %rp, %r26 <<
2044 LDREG -FTRACE_FRAME_SIZE-PT_SZ_ALGN <<
2045 ldo -8(%r25), %r25 <<
2046 ldo -FTRACE_FRAME_SIZE(%r1), %arg <<
2047 b,l ftrace_function_trampoline, % <<
2048 copy %r1, %arg3 /* struct pt_regs <<
2049 <<
2050 ldo -PT_SZ_ALGN(%sp), %r1 <<
2051 <<
2052 LDREG PT_SAR(%r1), %rp <<
2053 mtctl %rp, %cr11 <<
2054 <<
2055 LDREG PT_GR2(%r1), %rp <<
2056 LDREG PT_GR3(%r1), %r3 <<
2057 LDREG PT_GR4(%r1), %r4 <<
2058 LDREG PT_GR5(%r1), %r5 <<
2059 LDREG PT_GR6(%r1), %r6 <<
2060 LDREG PT_GR7(%r1), %r7 <<
2061 LDREG PT_GR8(%r1), %r8 <<
2062 LDREG PT_GR9(%r1), %r9 <<
2063 LDREG PT_GR10(%r1),%r10 <<
2064 LDREG PT_GR11(%r1),%r11 <<
2065 LDREG PT_GR12(%r1),%r12 <<
2066 LDREG PT_GR13(%r1),%r13 <<
2067 LDREG PT_GR14(%r1),%r14 <<
2068 LDREG PT_GR15(%r1),%r15 <<
2069 LDREG PT_GR16(%r1),%r16 <<
2070 LDREG PT_GR17(%r1),%r17 <<
2071 LDREG PT_GR18(%r1),%r18 <<
2072 LDREG PT_GR19(%r1),%r19 <<
2073 LDREG PT_GR20(%r1),%r20 <<
2074 LDREG PT_GR21(%r1),%r21 <<
2075 LDREG PT_GR22(%r1),%r22 <<
2076 LDREG PT_GR23(%r1),%r23 <<
2077 LDREG PT_GR24(%r1),%r24 <<
2078 LDREG PT_GR25(%r1),%r25 <<
2079 LDREG PT_GR26(%r1),%r26 <<
2080 LDREG PT_GR27(%r1),%r27 <<
2081 LDREG PT_GR28(%r1),%r28 <<
2082 LDREG PT_GR29(%r1),%r29 <<
2083 LDREG PT_GR30(%r1),%r30 <<
2084 LDREG PT_GR31(%r1),%r31 <<
2085 <<
2086 ldo -PT_SZ_ALGN(%sp), %sp <<
2087 LDREGM -FTRACE_FRAME_SIZE(%sp), %r1 <<
2088 /* Adjust return point to jump back t <<
2089 ldo -4(%r1), %r1 <<
2090 bv,n (%r1) <<
2091 <<
2092 ENDPROC_CFI(ftrace_regs_caller) <<
2093 <<
2094 #endif <<
2095 #endif <<
2096 <<
2097 #ifdef CONFIG_FUNCTION_GRAPH_TRACER <<
2098 .align 8 <<
2099 ENTRY_CFI(return_to_handler, caller,frame=FRA <<
2100 .export parisc_return_to_handler,data <<
2101 parisc_return_to_handler: <<
2102 copy %r3,%r1 <<
2103 STREG %r0,-RP_OFFSET(%sp) /* st <<
2104 copy %sp,%r3 <<
2105 STREGM %r1,FRAME_SIZE(%sp) <<
2106 STREG %ret0,8(%r3) <<
2107 STREG %ret1,16(%r3) <<
2108 <<
2109 #ifdef CONFIG_64BIT <<
2110 loadgp <<
2111 #endif <<
2112 <<
2113 /* call ftrace_return_to_handler(0) * <<
2114 .import ftrace_return_to_handler,code <<
2115 load32 ftrace_return_to_handler,%ret0 <<
2116 load32 .Lftrace_ret,%r2 <<
2117 #ifdef CONFIG_64BIT <<
2118 ldo -16(%sp),%ret1 /* Re <<
2119 bve (%ret0) <<
2120 #else <<
2121 bv %r0(%ret0) <<
2122 #endif <<
2123 ldi 0,%r26 <<
2124 .Lftrace_ret: <<
2125 copy %ret0,%rp <<
2126 <<
2127 /* restore original return values */ <<
2128 LDREG 8(%r3),%ret0 <<
2129 LDREG 16(%r3),%ret1 <<
2130 <<
2131 /* return from function */ <<
2132 #ifdef CONFIG_64BIT <<
2133 bve (%rp) <<
2134 #else <<
2135 bv %r0(%rp) <<
2136 #endif 378 #endif
2137 LDREGM -FRAME_SIZE(%sp),%r3 !! 379 2: fmovemx %fp0-%fp7,%a0@(TASK_THREAD+THREAD_FPREG)
2138 ENDPROC_CFI(return_to_handler) !! 380 fmoveml %fpcr/%fpsr/%fpiar,%a0@(TASK_THREAD+THREAD_FPCNTL)
2139 !! 381 3:
2140 #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ !! 382 #endif /* CONFIG_M68KFPU_EMU_ONLY */
2141 !! 383 /* Return previous task in %d1 */
2142 #endif /* CONFIG_FUNCTION_TRACER */ !! 384 movel %curptr,%d1
2143 !! 385
2144 #ifdef CONFIG_IRQSTACKS !! 386 /* switch to new task (a1 contains new task) */
2145 /* void call_on_stack(unsigned long param1, v !! 387 movel %a1,%curptr
2146 unsigned long new_stack !! 388
2147 ENTRY_CFI(call_on_stack, FRAME=2*FRAME_SIZE,C !! 389 /* restore floating point context */
2148 ENTRY(_call_on_stack) !! 390 #ifndef CONFIG_M68KFPU_EMU_ONLY
2149 copy %sp, %r1 !! 391 #ifdef CONFIG_M68KFPU_EMU
2150 !! 392 tstl m68k_fputype
2151 /* Regarding the HPPA calling convent !! 393 jeq 4f
2152 we assume the PIC register is not !! 394 #endif
2153 CONFIG_64BIT, the argument pointer !! 395 #if defined(CONFIG_M68060)
2154 argument region allocated for the !! 396 #if !defined(CPU_M68060_ONLY)
2155 !! 397 btst #3,m68k_cputype+3
2156 /* Switch to new stack. We allocate !! 398 beqs 1f
2157 ldo 2*FRAME_SIZE(%arg2), %sp !! 399 #endif
2158 # ifdef CONFIG_64BIT !! 400 /* The 060 FPU keeps status in bits 15-8 of the first longword */
2159 /* Save previous stack pointer and re !! 401 tstb %a1@(TASK_THREAD+THREAD_FPSTATE+2)
2160 STREG %rp, -FRAME_SIZE-RP_OFFSET(%s !! 402 jeq 3f
2161 /* Calls always use function descript !! 403 #if !defined(CPU_M68060_ONLY)
2162 LDREG 16(%arg1), %arg1 !! 404 jra 2f
2163 bve,l (%arg1), %rp !! 405 #endif
2164 STREG %r1, -FRAME_SIZE-REG_SZ(%sp) !! 406 #endif /* CONFIG_M68060 */
2165 LDREG -FRAME_SIZE-RP_OFFSET(%sp), % !! 407 #if !defined(CPU_M68060_ONLY)
2166 bve (%rp) !! 408 1: tstb %a1@(TASK_THREAD+THREAD_FPSTATE)
2167 LDREG -FRAME_SIZE-REG_SZ(%sp), %sp !! 409 jeq 3f
2168 # else !! 410 #endif
2169 /* Save previous stack pointer and re !! 411 2: fmovemx %a1@(TASK_THREAD+THREAD_FPREG),%fp0-%fp7
2170 STREG %r1, -FRAME_SIZE-REG_SZ(%sp) !! 412 fmoveml %a1@(TASK_THREAD+THREAD_FPCNTL),%fpcr/%fpsr/%fpiar
2171 STREG %rp, -FRAME_SIZE-RP_OFFSET(%s !! 413 3: frestore %a1@(TASK_THREAD+THREAD_FPSTATE)
2172 /* Calls use function descriptor if P !! 414 4:
2173 bb,>=,n %arg1, 30, 1f !! 415 #endif /* CONFIG_M68KFPU_EMU_ONLY */
2174 depwi 0,31,2, %arg1 !! 416
2175 LDREG 0(%arg1), %arg1 !! 417 /* restore the kernel stack pointer */
2176 1: !! 418 movel %a1@(TASK_THREAD+THREAD_KSP),%sp
2177 be,l 0(%sr4,%arg1), %sr0, %r31 !! 419
2178 copy %r31, %rp !! 420 /* restore non-scratch registers */
2179 LDREG -FRAME_SIZE-RP_OFFSET(%sp), % !! 421 RESTORE_SWITCH_STACK
2180 bv (%rp) !! 422
2181 LDREG -FRAME_SIZE-REG_SZ(%sp), %sp !! 423 /* restore user stack pointer */
2182 # endif /* CONFIG_64BIT */ !! 424 movel %a1@(TASK_THREAD+THREAD_USP),%a0
2183 ENDPROC_CFI(call_on_stack) !! 425 movel %a0,%usp
2184 #endif /* CONFIG_IRQSTACKS */ !! 426
2185 !! 427 /* restore fs (sfc,%dfc) */
2186 ENTRY_CFI(get_register) !! 428 movew %a1@(TASK_THREAD+THREAD_FC),%a0
2187 /* !! 429 movec %a0,%sfc
2188 * get_register is used by the non ac !! 430 movec %a0,%dfc
2189 * copy the value of the general regi !! 431
2190 * r1. This routine can't be used for !! 432 /* restore status register */
2191 * the rfir will restore the original !! 433 movew %a1@(TASK_THREAD+THREAD_SR),%d0
2192 * registers we put a -1 into r1 to i !! 434 oriw #0x0700,%d0
2193 * should not be used (the register b !! 435 movew %d0,%sr
2194 * a -1 in it, but that is OK, it jus <<
2195 * to use the slow path instead). <<
2196 */ <<
2197 blr %r8,%r0 <<
2198 nop <<
2199 bv %r0(%r25) /* r0 */ <<
2200 copy %r0,%r1 <<
2201 bv %r0(%r25) /* r1 - shadowed <<
2202 ldi -1,%r1 <<
2203 bv %r0(%r25) /* r2 */ <<
2204 copy %r2,%r1 <<
2205 bv %r0(%r25) /* r3 */ <<
2206 copy %r3,%r1 <<
2207 bv %r0(%r25) /* r4 */ <<
2208 copy %r4,%r1 <<
2209 bv %r0(%r25) /* r5 */ <<
2210 copy %r5,%r1 <<
2211 bv %r0(%r25) /* r6 */ <<
2212 copy %r6,%r1 <<
2213 bv %r0(%r25) /* r7 */ <<
2214 copy %r7,%r1 <<
2215 bv %r0(%r25) /* r8 - shadowed <<
2216 ldi -1,%r1 <<
2217 bv %r0(%r25) /* r9 - shadowed <<
2218 ldi -1,%r1 <<
2219 bv %r0(%r25) /* r10 */ <<
2220 copy %r10,%r1 <<
2221 bv %r0(%r25) /* r11 */ <<
2222 copy %r11,%r1 <<
2223 bv %r0(%r25) /* r12 */ <<
2224 copy %r12,%r1 <<
2225 bv %r0(%r25) /* r13 */ <<
2226 copy %r13,%r1 <<
2227 bv %r0(%r25) /* r14 */ <<
2228 copy %r14,%r1 <<
2229 bv %r0(%r25) /* r15 */ <<
2230 copy %r15,%r1 <<
2231 bv %r0(%r25) /* r16 - shadowe <<
2232 ldi -1,%r1 <<
2233 bv %r0(%r25) /* r17 - shadowe <<
2234 ldi -1,%r1 <<
2235 bv %r0(%r25) /* r18 */ <<
2236 copy %r18,%r1 <<
2237 bv %r0(%r25) /* r19 */ <<
2238 copy %r19,%r1 <<
2239 bv %r0(%r25) /* r20 */ <<
2240 copy %r20,%r1 <<
2241 bv %r0(%r25) /* r21 */ <<
2242 copy %r21,%r1 <<
2243 bv %r0(%r25) /* r22 */ <<
2244 copy %r22,%r1 <<
2245 bv %r0(%r25) /* r23 */ <<
2246 copy %r23,%r1 <<
2247 bv %r0(%r25) /* r24 - shadowe <<
2248 ldi -1,%r1 <<
2249 bv %r0(%r25) /* r25 - shadowe <<
2250 ldi -1,%r1 <<
2251 bv %r0(%r25) /* r26 */ <<
2252 copy %r26,%r1 <<
2253 bv %r0(%r25) /* r27 */ <<
2254 copy %r27,%r1 <<
2255 bv %r0(%r25) /* r28 */ <<
2256 copy %r28,%r1 <<
2257 bv %r0(%r25) /* r29 */ <<
2258 copy %r29,%r1 <<
2259 bv %r0(%r25) /* r30 */ <<
2260 copy %r30,%r1 <<
2261 bv %r0(%r25) /* r31 */ <<
2262 copy %r31,%r1 <<
2263 ENDPROC_CFI(get_register) <<
2264 <<
2265 436
2266 ENTRY_CFI(set_register) !! 437 rts
2267 /* <<
2268 * set_register is used by the non ac <<
2269 * copy the value of r1 into the gene <<
2270 * r8. <<
2271 */ <<
2272 blr %r8,%r0 <<
2273 nop <<
2274 bv %r0(%r25) /* r0 (silly, bu <<
2275 copy %r1,%r0 <<
2276 bv %r0(%r25) /* r1 */ <<
2277 copy %r1,%r1 <<
2278 bv %r0(%r25) /* r2 */ <<
2279 copy %r1,%r2 <<
2280 bv %r0(%r25) /* r3 */ <<
2281 copy %r1,%r3 <<
2282 bv %r0(%r25) /* r4 */ <<
2283 copy %r1,%r4 <<
2284 bv %r0(%r25) /* r5 */ <<
2285 copy %r1,%r5 <<
2286 bv %r0(%r25) /* r6 */ <<
2287 copy %r1,%r6 <<
2288 bv %r0(%r25) /* r7 */ <<
2289 copy %r1,%r7 <<
2290 bv %r0(%r25) /* r8 */ <<
2291 copy %r1,%r8 <<
2292 bv %r0(%r25) /* r9 */ <<
2293 copy %r1,%r9 <<
2294 bv %r0(%r25) /* r10 */ <<
2295 copy %r1,%r10 <<
2296 bv %r0(%r25) /* r11 */ <<
2297 copy %r1,%r11 <<
2298 bv %r0(%r25) /* r12 */ <<
2299 copy %r1,%r12 <<
2300 bv %r0(%r25) /* r13 */ <<
2301 copy %r1,%r13 <<
2302 bv %r0(%r25) /* r14 */ <<
2303 copy %r1,%r14 <<
2304 bv %r0(%r25) /* r15 */ <<
2305 copy %r1,%r15 <<
2306 bv %r0(%r25) /* r16 */ <<
2307 copy %r1,%r16 <<
2308 bv %r0(%r25) /* r17 */ <<
2309 copy %r1,%r17 <<
2310 bv %r0(%r25) /* r18 */ <<
2311 copy %r1,%r18 <<
2312 bv %r0(%r25) /* r19 */ <<
2313 copy %r1,%r19 <<
2314 bv %r0(%r25) /* r20 */ <<
2315 copy %r1,%r20 <<
2316 bv %r0(%r25) /* r21 */ <<
2317 copy %r1,%r21 <<
2318 bv %r0(%r25) /* r22 */ <<
2319 copy %r1,%r22 <<
2320 bv %r0(%r25) /* r23 */ <<
2321 copy %r1,%r23 <<
2322 bv %r0(%r25) /* r24 */ <<
2323 copy %r1,%r24 <<
2324 bv %r0(%r25) /* r25 */ <<
2325 copy %r1,%r25 <<
2326 bv %r0(%r25) /* r26 */ <<
2327 copy %r1,%r26 <<
2328 bv %r0(%r25) /* r27 */ <<
2329 copy %r1,%r27 <<
2330 bv %r0(%r25) /* r28 */ <<
2331 copy %r1,%r28 <<
2332 bv %r0(%r25) /* r29 */ <<
2333 copy %r1,%r29 <<
2334 bv %r0(%r25) /* r30 */ <<
2335 copy %r1,%r30 <<
2336 bv %r0(%r25) /* r31 */ <<
2337 copy %r1,%r31 <<
2338 ENDPROC_CFI(set_register) <<
2339 438
>> 439 #endif /* CONFIG_MMU && !CONFIG_COLDFIRE */
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.