| blob | 56ff51bc8c21c8a761dc75f334b9a00f223754a4 |
1 /*
2 * File: arch/blackfin/mach-common/entry.S
3 * Based on:
4 * Author: Linus Torvalds
5 *
6 * Created: ?
7 * Description: contains the system-call and fault low-level handling routines.
8 * This also contains the timer-interrupt handler, as well as all
9 * interrupts and faults that can result in a task-switch.
10 *
11 * Modified:
12 * Copyright 2004-2006 Analog Devices Inc.
13 *
14 * Bugs: Enter bugs at http://blackfin.uclinux.org/
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
24 * GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, see the file COPYING, or write
28 * to the Free Software Foundation, Inc.,
29 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
30 */
32 /* NOTE: This code handles signal-recognition, which happens every time
33 * after a timer-interrupt and after each system call.
34 */
36 #include <linux/init.h>
37 #include <linux/linkage.h>
38 #include <linux/unistd.h>
39 #include <asm/blackfin.h>
40 #include <asm/errno.h>
41 #include <asm/thread_info.h> /* TIF_NEED_RESCHED */
42 #include <asm/asm-offsets.h>
43 #include <asm/trace.h>
45 #include <asm/mach-common/context.S>
47 #if defined(CONFIG_BFIN_SCRATCH_REG_RETN)
48 # define EX_SCRATCH_REG RETN
49 #elif defined(CONFIG_BFIN_SCRATCH_REG_RETE)
50 # define EX_SCRATCH_REG RETE
51 #else
52 # define EX_SCRATCH_REG CYCLES
53 #endif
55 #if ANOMALY_05000281
56 ENTRY(_safe_speculative_execution)
57 NOP;
58 NOP;
59 NOP;
60 jump _safe_speculative_execution;
61 ENDPROC(_safe_speculative_execution)
62 #endif
64 #ifdef CONFIG_EXCPT_IRQ_SYSC_L1
65 .section .l1.text
66 #else
67 .text
68 #endif
70 /* Slightly simplified and streamlined entry point for CPLB misses.
71 * This one does not lower the level to IRQ5, and thus can be used to
72 * patch up CPLB misses on the kernel stack.
73 */
74 #if ANOMALY_05000261
75 #define _ex_dviol _ex_workaround_261
76 #define _ex_dmiss _ex_workaround_261
77 #define _ex_dmult _ex_workaround_261
79 ENTRY(_ex_workaround_261)
80 /*
81 * Work around an anomaly: if we see a new DCPLB fault, return
82 * without doing anything. Then, if we get the same fault again,
83 * handle it.
84 */
85 P4 = R7; /* Store EXCAUSE */
86 p5.l = _last_cplb_fault_retx;
87 p5.h = _last_cplb_fault_retx;
88 r7 = [p5];
89 r6 = retx;
90 [p5] = r6;
91 cc = r6 == r7;
92 if !cc jump _bfin_return_from_exception;
93 /* fall through */
94 R7 = P4;
95 R6 = 0x26; /* Data CPLB Miss */
96 cc = R6 == R7;
97 if cc jump _ex_dcplb_miss (BP);
98 R6 = 0x23; /* Data CPLB Miss */
99 cc = R6 == R7;
100 if cc jump _ex_dcplb_viol (BP);
101 /* Handle 0x23 Data CPLB Protection Violation
102 * and Data CPLB Multiple Hits - Linux Trap Zero
103 */
104 jump _ex_trap_c;
105 ENDPROC(_ex_workaround_261)
107 #else
108 #ifdef CONFIG_MPU
109 #define _ex_dviol _ex_dcplb_viol
110 #else
111 #define _ex_dviol _ex_trap_c
112 #endif
113 #define _ex_dmiss _ex_dcplb_miss
114 #define _ex_dmult _ex_trap_c
115 #endif
118 ENTRY(_ex_dcplb_viol)
119 ENTRY(_ex_dcplb_miss)
120 ENTRY(_ex_icplb_miss)
121 (R7:6,P5:4) = [sp++];
122 ASTAT = [sp++];
123 SAVE_ALL_SYS
124 #ifdef CONFIG_MPU
125 R0 = SEQSTAT;
126 R1 = SP;
127 sp += -12;
128 call _cplb_hdr;
129 sp += 12;
130 CC = R0 == 0;
131 IF !CC JUMP _handle_bad_cplb;
132 #else
133 call __cplb_hdr;
134 #endif
135 DEBUG_START_HWTRACE(p5, r7)
136 RESTORE_ALL_SYS
137 SP = EX_SCRATCH_REG;
138 rtx;
139 ENDPROC(_ex_icplb_miss)
141 ENTRY(_ex_syscall)
142 DEBUG_START_HWTRACE(p5, r7)
143 (R7:6,P5:4) = [sp++];
144 ASTAT = [sp++];
145 raise 15; /* invoked by TRAP #0, for sys call */
146 sp = EX_SCRATCH_REG;
147 rtx
148 ENDPROC(_ex_syscall)
150 ENTRY(_ex_soft_bp)
151 r7 = retx;
152 r7 += -2;
153 retx = r7;
154 jump.s _ex_trap_c;
155 ENDPROC(_ex_soft_bp)
157 ENTRY(_ex_single_step)
158 r7 = retx;
159 r6 = reti;
160 cc = r7 == r6;
161 if cc jump _bfin_return_from_exception
162 r7 = syscfg;
163 bitclr (r7, 0);
164 syscfg = R7;
166 p5.l = lo(IPEND);
167 p5.h = hi(IPEND);
168 r6 = [p5];
169 cc = bittst(r6, 5);
170 if !cc jump _ex_trap_c;
171 p4.l = lo(EVT5);
172 p4.h = hi(EVT5);
173 r6.h = _exception_to_level5;
174 r6.l = _exception_to_level5;
175 r7 = [p4];
176 cc = r6 == r7;
177 if !cc jump _ex_trap_c;
178 ENDPROC(_ex_single_step)
180 ENTRY(_bfin_return_from_exception)
181 DEBUG_START_HWTRACE(p5, r7)
182 #if ANOMALY_05000257
183 R7=LC0;
184 LC0=R7;
185 R7=LC1;
186 LC1=R7;
187 #endif
188 (R7:6,P5:4) = [sp++];
189 ASTAT = [sp++];
190 sp = EX_SCRATCH_REG;
191 rtx;
192 ENDPROC(_bfin_return_from_exception)
194 ENTRY(_handle_bad_cplb)
195 /* To get here, we just tried and failed to change a CPLB
196 * so, handle things in trap_c (C code), by lowering to
197 * IRQ5, just like we normally do. Since this is not a
198 * "normal" return path, we have a do alot of stuff to
199 * the stack to get ready so, we can fall through - we
200 * need to make a CPLB exception look like a normal exception
201 */
203 DEBUG_START_HWTRACE(p5, r7)
204 RESTORE_ALL_SYS
205 [--sp] = ASTAT;
206 [--sp] = (R7:6, P5:4);
208 ENTRY(_ex_replaceable)
209 nop;
211 ENTRY(_ex_trap_c)
212 /* Make sure we are not in a double fault */
213 p4.l = lo(IPEND);
214 p4.h = hi(IPEND);
215 r7 = [p4];
216 CC = BITTST (r7, 5);
217 if CC jump _double_fault;
219 /* Call C code (trap_c) to handle the exception, which most
220 * likely involves sending a signal to the current process.
221 * To avoid double faults, lower our priority to IRQ5 first.
222 */
223 P5.h = _exception_to_level5;
224 P5.l = _exception_to_level5;
225 p4.l = lo(EVT5);
226 p4.h = hi(EVT5);
227 [p4] = p5;
228 csync;
230 /* Disable all interrupts, but make sure level 5 is enabled so
231 * we can switch to that level. Save the old mask. */
232 cli r6;
233 p4.l = _excpt_saved_imask;
234 p4.h = _excpt_saved_imask;
235 [p4] = r6;
236 r6 = 0x3f;
237 sti r6;
239 /* Save the excause into a circular buffer, in case the instruction
240 * which caused this excecptions causes others.
241 */
242 P5.l = _in_ptr_excause;
243 P5.h = _in_ptr_excause;
244 R7 = [P5];
245 R7 += 4;
246 R6 = 0xF;
247 R7 = R7 & R6;
248 [P5] = R7;
249 R6.l = _excause_circ_buf;
250 R6.h = _excause_circ_buf;
251 R7 = R7 + R6;
252 p5 = R7;
253 R6 = SEQSTAT;
254 [P5] = R6;
256 DEBUG_START_HWTRACE(p5, r7)
257 (R7:6,P5:4) = [sp++];
258 ASTAT = [sp++];
259 SP = EX_SCRATCH_REG;
260 raise 5;
261 rtx;
262 ENDPROC(_ex_trap_c)
264 /* We just realized we got an exception, while we were processing a different
265 * exception. This is a unrecoverable event, so crash
266 */
267 ENTRY(_double_fault)
268 /* Turn caches & protection off, to ensure we don't get any more
269 * double exceptions
270 */
272 P4.L = LO(IMEM_CONTROL);
273 P4.H = HI(IMEM_CONTROL);
275 R5 = [P4]; /* Control Register*/
276 BITCLR(R5,ENICPLB_P);
277 SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */
278 .align 8;
279 [P4] = R5;
280 SSYNC;
282 P4.L = LO(DMEM_CONTROL);
283 P4.H = HI(DMEM_CONTROL);
284 R5 = [P4];
285 BITCLR(R5,ENDCPLB_P);
286 SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
287 .align 8;
288 [P4] = R5;
289 SSYNC;
291 /* Fix up the stack */
292 (R7:6,P5:4) = [sp++];
293 ASTAT = [sp++];
294 SP = EX_SCRATCH_REG;
296 /* We should be out of the exception stack, and back down into
297 * kernel or user space stack
298 */
299 SAVE_ALL_SYS
301 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
302 SP += -12;
303 call _double_fault_c;
304 SP += 12;
305 .L_double_fault_panic:
306 JUMP .L_double_fault_panic
308 ENDPROC(_double_fault)
310 ENTRY(_exception_to_level5)
311 SAVE_ALL_SYS
313 /* Restore interrupt mask. We haven't pushed RETI, so this
314 * doesn't enable interrupts until we return from this handler. */
315 p4.l = _excpt_saved_imask;
316 p4.h = _excpt_saved_imask;
317 r6 = [p4];
318 sti r6;
320 /* Restore the hardware error vector. */
321 P5.h = _evt_ivhw;
322 P5.l = _evt_ivhw;
323 p4.l = lo(EVT5);
324 p4.h = hi(EVT5);
325 [p4] = p5;
326 csync;
328 p2.l = lo(IPEND);
329 p2.h = hi(IPEND);
330 csync;
331 r0 = [p2]; /* Read current IPEND */
332 [sp + PT_IPEND] = r0; /* Store IPEND */
334 /* Pop the excause from the circular buffer and push it on the stack
335 * (in the right place - if you change the location of SEQSTAT, you
336 * must change this offset.
337 */
338 .L_excep_to_5_again:
339 P5.l = _out_ptr_excause;
340 P5.h = _out_ptr_excause;
341 R7 = [P5];
342 R7 += 4;
343 R6 = 0xF;
344 R7 = R7 & R6;
345 [P5] = R7;
346 R6.l = _excause_circ_buf;
347 R6.h = _excause_circ_buf;
348 R7 = R7 + R6;
349 P5 = R7;
350 R1 = [P5];
351 [SP + PT_SEQSTAT] = r1;
353 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
354 SP += -12;
355 call _trap_c;
356 SP += 12;
358 /* See if anything else is in the exception buffer
359 * if there is, process it
360 */
361 P5.l = _out_ptr_excause;
362 P5.h = _out_ptr_excause;
363 P4.l = _in_ptr_excause;
364 P4.h = _in_ptr_excause;
365 R6 = [P5];
366 R7 = [P4];
367 CC = R6 == R7;
368 if ! CC JUMP .L_excep_to_5_again
370 call _ret_from_exception;
371 RESTORE_ALL_SYS
372 rti;
373 ENDPROC(_exception_to_level5)
375 ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/
376 /* Since the kernel stack can be anywhere, it's not guaranteed to be
377 * covered by a CPLB. Switch to an exception stack; use RETN as a
378 * scratch register (for want of a better option).
379 */
380 EX_SCRATCH_REG = sp;
381 sp.l = _exception_stack_top;
382 sp.h = _exception_stack_top;
383 /* Try to deal with syscalls quickly. */
384 [--sp] = ASTAT;
385 [--sp] = (R7:6, P5:4);
386 DEBUG_STOP_HWTRACE(p5, r7)
387 r7 = SEQSTAT; /* reason code is in bit 5:0 */
388 r6.l = lo(SEQSTAT_EXCAUSE);
389 r6.h = hi(SEQSTAT_EXCAUSE);
390 r7 = r7 & r6;
391 p5.h = _ex_table;
392 p5.l = _ex_table;
393 p4 = r7;
394 p5 = p5 + (p4 << 2);
395 p4 = [p5];
396 jump (p4);
398 .Lbadsys:
399 r7 = -ENOSYS; /* signextending enough */
400 [sp + PT_R0] = r7; /* return value from system call */
401 jump .Lsyscall_really_exit;
402 ENDPROC(_trap)
404 ENTRY(_kernel_execve)
405 link SIZEOF_PTREGS;
406 p0 = sp;
407 r3 = SIZEOF_PTREGS / 4;
408 r4 = 0(x);
409 0:
410 [p0++] = r4;
411 r3 += -1;
412 cc = r3 == 0;
413 if !cc jump 0b (bp);
415 p0 = sp;
416 sp += -16;
417 [sp + 12] = p0;
418 call _do_execve;
419 SP += 16;
420 cc = r0 == 0;
421 if ! cc jump 1f;
422 /* Success. Copy our temporary pt_regs to the top of the kernel
423 * stack and do a normal exception return.
424 */
425 r1 = sp;
426 r0 = (-KERNEL_STACK_SIZE) (x);
427 r1 = r1 & r0;
428 p2 = r1;
429 p3 = [p2];
430 r0 = KERNEL_STACK_SIZE - 4 (z);
431 p1 = r0;
432 p1 = p1 + p2;
434 p0 = fp;
435 r4 = [p0--];
436 r3 = SIZEOF_PTREGS / 4;
437 0:
438 r4 = [p0--];
439 [p1--] = r4;
440 r3 += -1;
441 cc = r3 == 0;
442 if ! cc jump 0b (bp);
444 r0 = (KERNEL_STACK_SIZE - SIZEOF_PTREGS) (z);
445 p1 = r0;
446 p1 = p1 + p2;
447 sp = p1;
448 r0 = syscfg;
449 [SP + PT_SYSCFG] = r0;
450 [p3 + (TASK_THREAD + THREAD_KSP)] = sp;
452 RESTORE_CONTEXT;
453 rti;
454 1:
455 unlink;
456 rts;
457 ENDPROC(_kernel_execve)
459 ENTRY(_system_call)
460 /* Store IPEND */
461 p2.l = lo(IPEND);
462 p2.h = hi(IPEND);
463 csync;
464 r0 = [p2];
465 [sp + PT_IPEND] = r0;
467 /* Store RETS for now */
468 r0 = rets;
469 [sp + PT_RESERVED] = r0;
470 /* Set the stack for the current process */
471 r7 = sp;
472 r6.l = lo(ALIGN_PAGE_MASK);
473 r6.h = hi(ALIGN_PAGE_MASK);
474 r7 = r7 & r6; /* thread_info */
475 p2 = r7;
476 p2 = [p2];
478 [p2+(TASK_THREAD+THREAD_KSP)] = sp;
480 /* Check the System Call */
481 r7 = __NR_syscall;
482 /* System call number is passed in P0 */
483 r6 = p0;
484 cc = r6 < r7;
485 if ! cc jump .Lbadsys;
487 /* are we tracing syscalls?*/
488 r7 = sp;
489 r6.l = lo(ALIGN_PAGE_MASK);
490 r6.h = hi(ALIGN_PAGE_MASK);
491 r7 = r7 & r6;
492 p2 = r7;
493 r7 = [p2+TI_FLAGS];
494 CC = BITTST(r7,TIF_SYSCALL_TRACE);
495 if CC JUMP _sys_trace;
497 /* Execute the appropriate system call */
499 p4 = p0;
500 p5.l = _sys_call_table;
501 p5.h = _sys_call_table;
502 p5 = p5 + (p4 << 2);
503 r0 = [sp + PT_R0];
504 r1 = [sp + PT_R1];
505 r2 = [sp + PT_R2];
506 p5 = [p5];
508 [--sp] = r5;
509 [--sp] = r4;
510 [--sp] = r3;
511 SP += -12;
512 call (p5);
513 SP += 24;
514 [sp + PT_R0] = r0;
516 .Lresume_userspace:
517 r7 = sp;
518 r4.l = lo(ALIGN_PAGE_MASK);
519 r4.h = hi(ALIGN_PAGE_MASK);
520 r7 = r7 & r4; /* thread_info->flags */
521 p5 = r7;
522 .Lresume_userspace_1:
523 /* Disable interrupts. */
524 [--sp] = reti;
525 reti = [sp++];
527 r7 = [p5 + TI_FLAGS];
528 r4.l = lo(_TIF_WORK_MASK);
529 r4.h = hi(_TIF_WORK_MASK);
530 r7 = r7 & r4;
532 .Lsyscall_resched:
533 cc = BITTST(r7, TIF_NEED_RESCHED);
534 if !cc jump .Lsyscall_sigpending;
536 /* Reenable interrupts. */
537 [--sp] = reti;
538 r0 = [sp++];
540 SP += -12;
541 call _schedule;
542 SP += 12;
544 jump .Lresume_userspace_1;
546 .Lsyscall_sigpending:
547 cc = BITTST(r7, TIF_RESTORE_SIGMASK);
548 if cc jump .Lsyscall_do_signals;
549 cc = BITTST(r7, TIF_SIGPENDING);
550 if !cc jump .Lsyscall_really_exit;
551 .Lsyscall_do_signals:
552 /* Reenable interrupts. */
553 [--sp] = reti;
554 r0 = [sp++];
556 r0 = sp;
557 SP += -12;
558 call _do_signal;
559 SP += 12;
561 .Lsyscall_really_exit:
562 r5 = [sp + PT_RESERVED];
563 rets = r5;
564 rts;
565 ENDPROC(_system_call)
567 _sys_trace:
568 call _syscall_trace;
570 /* Execute the appropriate system call */
572 p4 = [SP + PT_P0];
573 p5.l = _sys_call_table;
574 p5.h = _sys_call_table;
575 p5 = p5 + (p4 << 2);
576 r0 = [sp + PT_R0];
577 r1 = [sp + PT_R1];
578 r2 = [sp + PT_R2];
579 r3 = [sp + PT_R3];
580 r4 = [sp + PT_R4];
581 r5 = [sp + PT_R5];
582 p5 = [p5];
584 [--sp] = r5;
585 [--sp] = r4;
586 [--sp] = r3;
587 SP += -12;
588 call (p5);
589 SP += 24;
590 [sp + PT_R0] = r0;
592 call _syscall_trace;
593 jump .Lresume_userspace;
594 ENDPROC(_sys_trace)
596 ENTRY(_resume)
597 /*
598 * Beware - when entering resume, prev (the current task) is
599 * in r0, next (the new task) is in r1.
600 */
601 p0 = r0;
602 p1 = r1;
603 [--sp] = rets;
604 [--sp] = fp;
605 [--sp] = (r7:4, p5:3);
607 /* save usp */
608 p2 = usp;
609 [p0+(TASK_THREAD+THREAD_USP)] = p2;
611 /* save current kernel stack pointer */
612 [p0+(TASK_THREAD+THREAD_KSP)] = sp;
614 /* save program counter */
615 r1.l = _new_old_task;
616 r1.h = _new_old_task;
617 [p0+(TASK_THREAD+THREAD_PC)] = r1;
619 /* restore the kernel stack pointer */
620 sp = [p1+(TASK_THREAD+THREAD_KSP)];
622 /* restore user stack pointer */
623 p0 = [p1+(TASK_THREAD+THREAD_USP)];
624 usp = p0;
626 /* restore pc */
627 p0 = [p1+(TASK_THREAD+THREAD_PC)];
628 jump (p0);
630 /*
631 * Following code actually lands up in a new (old) task.
632 */
634 _new_old_task:
635 (r7:4, p5:3) = [sp++];
636 fp = [sp++];
637 rets = [sp++];
639 /*
640 * When we come out of resume, r0 carries "old" task, becuase we are
641 * in "new" task.
642 */
643 rts;
644 ENDPROC(_resume)
646 ENTRY(_ret_from_exception)
647 p2.l = lo(IPEND);
648 p2.h = hi(IPEND);
650 csync;
651 r0 = [p2];
652 [sp + PT_IPEND] = r0;
654 1:
655 r2 = LO(~0x37) (Z);
656 r0 = r2 & r0;
657 cc = r0 == 0;
658 if !cc jump 4f; /* if not return to user mode, get out */
660 /* Make sure any pending system call or deferred exception
661 * return in ILAT for this process to get executed, otherwise
662 * in case context switch happens, system call of
663 * first process (i.e in ILAT) will be carried
664 * forward to the switched process
665 */
667 p2.l = lo(ILAT);
668 p2.h = hi(ILAT);
669 r0 = [p2];
670 r1 = (EVT_IVG14 | EVT_IVG15) (z);
671 r0 = r0 & r1;
672 cc = r0 == 0;
673 if !cc jump 5f;
675 /* Set the stack for the current process */
676 r7 = sp;
677 r4.l = lo(ALIGN_PAGE_MASK);
678 r4.h = hi(ALIGN_PAGE_MASK);
679 r7 = r7 & r4; /* thread_info->flags */
680 p5 = r7;
681 r7 = [p5 + TI_FLAGS];
682 r4.l = lo(_TIF_WORK_MASK);
683 r4.h = hi(_TIF_WORK_MASK);
684 r7 = r7 & r4;
685 cc = r7 == 0;
686 if cc jump 4f;
688 p0.l = lo(EVT15);
689 p0.h = hi(EVT15);
690 p1.l = _schedule_and_signal;
691 p1.h = _schedule_and_signal;
692 [p0] = p1;
693 csync;
694 raise 15; /* raise evt14 to do signal or reschedule */
695 4:
696 r0 = syscfg;
697 bitclr(r0, 0);
698 syscfg = r0;
699 5:
700 rts;
701 ENDPROC(_ret_from_exception)
703 ENTRY(_return_from_int)
704 /* If someone else already raised IRQ 15, do nothing. */
705 csync;
706 p2.l = lo(ILAT);
707 p2.h = hi(ILAT);
708 r0 = [p2];
709 cc = bittst (r0, EVT_IVG15_P);
710 if cc jump 2f;
712 /* if not return to user mode, get out */
713 p2.l = lo(IPEND);
714 p2.h = hi(IPEND);
715 r0 = [p2];
716 r1 = 0x17(Z);
717 r2 = ~r1;
718 r2.h = 0;
719 r0 = r2 & r0;
720 r1 = 1;
721 r1 = r0 - r1;
722 r2 = r0 & r1;
723 cc = r2 == 0;
724 if !cc jump 2f;
726 /* Lower the interrupt level to 15. */
727 p0.l = lo(EVT15);
728 p0.h = hi(EVT15);
729 p1.l = _schedule_and_signal_from_int;
730 p1.h = _schedule_and_signal_from_int;
731 [p0] = p1;
732 csync;
733 #if ANOMALY_05000281
734 r0.l = _safe_speculative_execution;
735 r0.h = _safe_speculative_execution;
736 reti = r0;
737 #endif
738 r0 = 0x801f (z);
739 STI r0;
740 raise 15; /* raise evt15 to do signal or reschedule */
741 rti;
742 2:
743 rts;
744 ENDPROC(_return_from_int)
746 ENTRY(_lower_to_irq14)
747 #if ANOMALY_05000281
748 r0.l = _safe_speculative_execution;
749 r0.h = _safe_speculative_execution;
750 reti = r0;
751 #endif
752 r0 = 0x401f;
753 sti r0;
754 raise 14;
755 rti;
756 ENTRY(_evt14_softirq)
757 #ifdef CONFIG_DEBUG_HWERR
758 r0 = 0x3f;
759 sti r0;
760 #else
761 cli r0;
762 #endif
763 [--sp] = RETI;
764 SP += 4;
765 rts;
767 _schedule_and_signal_from_int:
768 /* To end up here, vector 15 was changed - so we have to change it
769 * back.
770 */
771 p0.l = lo(EVT15);
772 p0.h = hi(EVT15);
773 p1.l = _evt_system_call;
774 p1.h = _evt_system_call;
775 [p0] = p1;
776 csync;
778 /* Set orig_p0 to -1 to indicate this isn't the end of a syscall. */
779 r0 = -1 (x);
780 [sp + PT_ORIG_P0] = r0;
782 p1 = rets;
783 [sp + PT_RESERVED] = p1;
785 p0.l = _irq_flags;
786 p0.h = _irq_flags;
787 r0 = [p0];
788 sti r0;
790 r0 = sp;
791 sp += -12;
792 call _finish_atomic_sections;
793 sp += 12;
794 jump.s .Lresume_userspace;
796 _schedule_and_signal:
797 SAVE_CONTEXT_SYSCALL
798 /* To end up here, vector 15 was changed - so we have to change it
799 * back.
800 */
801 p0.l = lo(EVT15);
802 p0.h = hi(EVT15);
803 p1.l = _evt_system_call;
804 p1.h = _evt_system_call;
805 [p0] = p1;
806 csync;
807 p0.l = 1f;
808 p0.h = 1f;
809 [sp + PT_RESERVED] = P0;
810 call .Lresume_userspace;
811 1:
812 RESTORE_CONTEXT
813 rti;
814 ENDPROC(_lower_to_irq14)
816 /* Make sure when we start, that the circular buffer is initialized properly
817 * R0 and P0 are call clobbered, so we can use them here.
818 */
819 ENTRY(_init_exception_buff)
820 r0 = 0;
821 p0.h = _in_ptr_excause;
822 p0.l = _in_ptr_excause;
823 [p0] = r0;
824 p0.h = _out_ptr_excause;
825 p0.l = _out_ptr_excause;
826 [p0] = r0;
827 rts;
828 ENDPROC(_init_exception_buff)
830 /* We handle this 100% in exception space - to reduce overhead
831 * Only potiential problem is if the software buffer gets swapped out of the
832 * CPLB table - then double fault. - so we don't let this happen in other places
833 */
834 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
835 ENTRY(_ex_trace_buff_full)
836 [--sp] = P3;
837 [--sp] = P2;
838 [--sp] = LC0;
839 [--sp] = LT0;
840 [--sp] = LB0;
841 P5.L = _trace_buff_offset;
842 P5.H = _trace_buff_offset;
843 P3 = [P5]; /* trace_buff_offset */
844 P5.L = lo(TBUFSTAT);
845 P5.H = hi(TBUFSTAT);
846 R7 = [P5];
847 R7 <<= 1; /* double, since we need to read twice */
848 LC0 = R7;
849 R7 <<= 2; /* need to shift over again,
850 * to get the number of bytes */
851 P5.L = lo(TBUF);
852 P5.H = hi(TBUF);
853 R6 = ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*1024) - 1;
855 P2 = R7;
856 P3 = P3 + P2;
857 R7 = P3;
858 R7 = R7 & R6;
859 P3 = R7;
860 P2.L = _trace_buff_offset;
861 P2.H = _trace_buff_offset;
862 [P2] = P3;
864 P2.L = _software_trace_buff;
865 P2.H = _software_trace_buff;
867 LSETUP (.Lstart, .Lend) LC0;
868 .Lstart:
869 R7 = [P5]; /* read TBUF */
870 P4 = P3 + P2;
871 [P4] = R7;
872 P3 += -4;
873 R7 = P3;
874 R7 = R7 & R6;
875 .Lend:
876 P3 = R7;
878 LB0 = [sp++];
879 LT0 = [sp++];
880 LC0 = [sp++];
881 P2 = [sp++];
882 P3 = [sp++];
883 jump _bfin_return_from_exception;
884 ENDPROC(_ex_trace_buff_full)
886 #if CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN == 4
887 .data
888 #else
889 .section .l1.data.B
890 #endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN */
891 ENTRY(_trace_buff_offset)
892 .long 0;
893 ALIGN
894 ENTRY(_software_trace_buff)
895 .rept ((1 << CONFIG_DEBUG_BFIN_HWTRACE_EXPAND_LEN)*256);
896 .long 0
897 .endr
898 #endif /* CONFIG_DEBUG_BFIN_HWTRACE_EXPAND */
900 #if CONFIG_EARLY_PRINTK
901 __INIT
902 ENTRY(_early_trap)
903 SAVE_ALL_SYS
904 trace_buffer_stop(p0,r0);
906 /* Turn caches off, to ensure we don't get double exceptions */
908 P4.L = LO(IMEM_CONTROL);
909 P4.H = HI(IMEM_CONTROL);
911 R5 = [P4]; /* Control Register*/
912 BITCLR(R5,ENICPLB_P);
913 CLI R1;
914 SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */
915 .align 8;
916 [P4] = R5;
917 SSYNC;
919 P4.L = LO(DMEM_CONTROL);
920 P4.H = HI(DMEM_CONTROL);
921 R5 = [P4];
922 BITCLR(R5,ENDCPLB_P);
923 SSYNC; /* SSYNC required before writing to DMEM_CONTROL. */
924 .align 8;
925 [P4] = R5;
926 SSYNC;
927 STI R1;
929 r0 = sp; /* stack frame pt_regs pointer argument ==> r0 */
930 r1 = RETX;
932 SP += -12;
933 call _early_trap_c;
934 SP += 12;
935 ENDPROC(_early_trap)
936 __FINIT
937 #endif /* CONFIG_EARLY_PRINTK */
939 /*
940 * Put these in the kernel data section - that should always be covered by
941 * a CPLB. This is needed to ensure we don't get double fault conditions
942 */
944 #ifdef CONFIG_SYSCALL_TAB_L1
945 .section .l1.data
946 #else
947 .data
948 #endif
950 ENTRY(_ex_table)
951 /* entry for each EXCAUSE[5:0]
952 * This table must be in sync with the table in ./kernel/traps.c
953 * EXCPT instruction can provide 4 bits of EXCAUSE, allowing 16 to be user defined
954 */
955 .long _ex_syscall /* 0x00 - User Defined - Linux Syscall */
956 .long _ex_soft_bp /* 0x01 - User Defined - Software breakpoint */
957 .long _ex_replaceable /* 0x02 - User Defined */
958 .long _ex_trap_c /* 0x03 - User Defined - userspace stack overflow */
959 .long _ex_trap_c /* 0x04 - User Defined - dump trace buffer */
960 .long _ex_replaceable /* 0x05 - User Defined */
961 .long _ex_replaceable /* 0x06 - User Defined */
962 .long _ex_replaceable /* 0x07 - User Defined */
963 .long _ex_replaceable /* 0x08 - User Defined */
964 .long _ex_replaceable /* 0x09 - User Defined */
965 .long _ex_replaceable /* 0x0A - User Defined */
966 .long _ex_replaceable /* 0x0B - User Defined */
967 .long _ex_replaceable /* 0x0C - User Defined */
968 .long _ex_replaceable /* 0x0D - User Defined */
969 .long _ex_replaceable /* 0x0E - User Defined */
970 .long _ex_replaceable /* 0x0F - User Defined */
971 .long _ex_single_step /* 0x10 - HW Single step */
972 #ifdef CONFIG_DEBUG_BFIN_HWTRACE_EXPAND
973 .long _ex_trace_buff_full /* 0x11 - Trace Buffer Full */
974 #else
975 .long _ex_trap_c /* 0x11 - Trace Buffer Full */
976 #endif
977 .long _ex_trap_c /* 0x12 - Reserved */
978 .long _ex_trap_c /* 0x13 - Reserved */
979 .long _ex_trap_c /* 0x14 - Reserved */
980 .long _ex_trap_c /* 0x15 - Reserved */
981 .long _ex_trap_c /* 0x16 - Reserved */
982 .long _ex_trap_c /* 0x17 - Reserved */
983 .long _ex_trap_c /* 0x18 - Reserved */
984 .long _ex_trap_c /* 0x19 - Reserved */
985 .long _ex_trap_c /* 0x1A - Reserved */
986 .long _ex_trap_c /* 0x1B - Reserved */
987 .long _ex_trap_c /* 0x1C - Reserved */
988 .long _ex_trap_c /* 0x1D - Reserved */
989 .long _ex_trap_c /* 0x1E - Reserved */
990 .long _ex_trap_c /* 0x1F - Reserved */
991 .long _ex_trap_c /* 0x20 - Reserved */
992 .long _ex_trap_c /* 0x21 - Undefined Instruction */
993 .long _ex_trap_c /* 0x22 - Illegal Instruction Combination */
994 .long _ex_dviol /* 0x23 - Data CPLB Protection Violation */
995 .long _ex_trap_c /* 0x24 - Data access misaligned */
996 .long _ex_trap_c /* 0x25 - Unrecoverable Event */
997 .long _ex_dmiss /* 0x26 - Data CPLB Miss */
998 .long _ex_dmult /* 0x27 - Data CPLB Multiple Hits - Linux Trap Zero */
999 .long _ex_trap_c /* 0x28 - Emulation Watchpoint */
1000 .long _ex_trap_c /* 0x29 - Instruction fetch access error (535 only) */
1001 .long _ex_trap_c /* 0x2A - Instruction fetch misaligned */
1002 .long _ex_trap_c /* 0x2B - Instruction CPLB protection Violation */
1003 .long _ex_icplb_miss /* 0x2C - Instruction CPLB miss */
1004 .long _ex_trap_c /* 0x2D - Instruction CPLB Multiple Hits */
1005 .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */
1006 .long _ex_trap_c /* 0x2E - Illegal use of Supervisor Resource */
1007 .long _ex_trap_c /* 0x2F - Reserved */
1008 .long _ex_trap_c /* 0x30 - Reserved */
1009 .long _ex_trap_c /* 0x31 - Reserved */
1010 .long _ex_trap_c /* 0x32 - Reserved */
1011 .long _ex_trap_c /* 0x33 - Reserved */
1012 .long _ex_trap_c /* 0x34 - Reserved */
1013 .long _ex_trap_c /* 0x35 - Reserved */
1014 .long _ex_trap_c /* 0x36 - Reserved */
1015 .long _ex_trap_c /* 0x37 - Reserved */
1016 .long _ex_trap_c /* 0x38 - Reserved */
1017 .long _ex_trap_c /* 0x39 - Reserved */
1018 .long _ex_trap_c /* 0x3A - Reserved */
1019 .long _ex_trap_c /* 0x3B - Reserved */
1020 .long _ex_trap_c /* 0x3C - Reserved */
1021 .long _ex_trap_c /* 0x3D - Reserved */
1022 .long _ex_trap_c /* 0x3E - Reserved */
1023 .long _ex_trap_c /* 0x3F - Reserved */
1024 END(_ex_table)
1026 ENTRY(_sys_call_table)
1027 .long _sys_restart_syscall /* 0 */
1028 .long _sys_exit
1029 .long _sys_fork
1030 .long _sys_read
1031 .long _sys_write
1032 .long _sys_open /* 5 */
1033 .long _sys_close
1034 .long _sys_ni_syscall /* old waitpid */
1035 .long _sys_creat
1036 .long _sys_link
1037 .long _sys_unlink /* 10 */
1038 .long _sys_execve
1039 .long _sys_chdir
1040 .long _sys_time
1041 .long _sys_mknod
1042 .long _sys_chmod /* 15 */
1043 .long _sys_chown /* chown16 */
1044 .long _sys_ni_syscall /* old break syscall holder */
1045 .long _sys_ni_syscall /* old stat */
1046 .long _sys_lseek
1047 .long _sys_getpid /* 20 */
1048 .long _sys_mount
1049 .long _sys_ni_syscall /* old umount */
1050 .long _sys_setuid
1051 .long _sys_getuid
1052 .long _sys_stime /* 25 */
1053 .long _sys_ptrace
1054 .long _sys_alarm
1055 .long _sys_ni_syscall /* old fstat */
1056 .long _sys_pause
1057 .long _sys_ni_syscall /* old utime */ /* 30 */
1058 .long _sys_ni_syscall /* old stty syscall holder */
1059 .long _sys_ni_syscall /* old gtty syscall holder */
1060 .long _sys_access
1061 .long _sys_nice
1062 .long _sys_ni_syscall /* 35 */ /* old ftime syscall holder */
1063 .long _sys_sync
1064 .long _sys_kill
1065 .long _sys_rename
1066 .long _sys_mkdir
1067 .long _sys_rmdir /* 40 */
1068 .long _sys_dup
1069 .long _sys_pipe
1070 .long _sys_times
1071 .long _sys_ni_syscall /* old prof syscall holder */
1072 .long _sys_brk /* 45 */
1073 .long _sys_setgid
1074 .long _sys_getgid
1075 .long _sys_ni_syscall /* old sys_signal */
1076 .long _sys_geteuid /* geteuid16 */
1077 .long _sys_getegid /* getegid16 */ /* 50 */
1078 .long _sys_acct
1079 .long _sys_umount /* recycled never used phys() */
1080 .long _sys_ni_syscall /* old lock syscall holder */
1081 .long _sys_ioctl
1082 .long _sys_fcntl /* 55 */
1083 .long _sys_ni_syscall /* old mpx syscall holder */
1084 .long _sys_setpgid
1085 .long _sys_ni_syscall /* old ulimit syscall holder */
1086 .long _sys_ni_syscall /* old old uname */
1087 .long _sys_umask /* 60 */
1088 .long _sys_chroot
1089 .long _sys_ustat
1090 .long _sys_dup2
1091 .long _sys_getppid
1092 .long _sys_getpgrp /* 65 */
1093 .long _sys_setsid
1094 .long _sys_ni_syscall /* old sys_sigaction */
1095 .long _sys_sgetmask
1096 .long _sys_ssetmask
1097 .long _sys_setreuid /* setreuid16 */ /* 70 */
1098 .long _sys_setregid /* setregid16 */
1099 .long _sys_ni_syscall /* old sys_sigsuspend */
1100 .long _sys_ni_syscall /* old sys_sigpending */
1101 .long _sys_sethostname
1102 .long _sys_setrlimit /* 75 */
1103 .long _sys_ni_syscall /* old getrlimit */
1104 .long _sys_getrusage
1105 .long _sys_gettimeofday
1106 .long _sys_settimeofday
1107 .long _sys_getgroups /* getgroups16 */ /* 80 */
1108 .long _sys_setgroups /* setgroups16 */
1109 .long _sys_ni_syscall /* old_select */
1110 .long _sys_symlink
1111 .long _sys_ni_syscall /* old lstat */
1112 .long _sys_readlink /* 85 */
1113 .long _sys_uselib
1114 .long _sys_ni_syscall /* sys_swapon */
1115 .long _sys_reboot
1116 .long _sys_ni_syscall /* old_readdir */
1117 .long _sys_ni_syscall /* sys_mmap */ /* 90 */
1118 .long _sys_munmap
1119 .long _sys_truncate
1120 .long _sys_ftruncate
1121 .long _sys_fchmod
1122 .long _sys_fchown /* fchown16 */ /* 95 */
1123 .long _sys_getpriority
1124 .long _sys_setpriority
1125 .long _sys_ni_syscall /* old profil syscall holder */
1126 .long _sys_statfs
1127 .long _sys_fstatfs /* 100 */
1128 .long _sys_ni_syscall
1129 .long _sys_ni_syscall /* old sys_socketcall */
1130 .long _sys_syslog
1131 .long _sys_setitimer
1132 .long _sys_getitimer /* 105 */
1133 .long _sys_newstat
1134 .long _sys_newlstat
1135 .long _sys_newfstat
1136 .long _sys_ni_syscall /* old uname */
1137 .long _sys_ni_syscall /* iopl for i386 */ /* 110 */
1138 .long _sys_vhangup
1139 .long _sys_ni_syscall /* obsolete idle() syscall */
1140 .long _sys_ni_syscall /* vm86old for i386 */
1141 .long _sys_wait4
1142 .long _sys_ni_syscall /* 115 */ /* sys_swapoff */
1143 .long _sys_sysinfo
1144 .long _sys_ni_syscall /* old sys_ipc */
1145 .long _sys_fsync
1146 .long _sys_ni_syscall /* old sys_sigreturn */
1147 .long _sys_clone /* 120 */
1148 .long _sys_setdomainname
1149 .long _sys_newuname
1150 .long _sys_ni_syscall /* old sys_modify_ldt */
1151 .long _sys_adjtimex
1152 .long _sys_ni_syscall /* 125 */ /* sys_mprotect */
1153 .long _sys_ni_syscall /* old sys_sigprocmask */
1154 .long _sys_ni_syscall /* old "creat_module" */
1155 .long _sys_init_module
1156 .long _sys_delete_module
1157 .long _sys_ni_syscall /* 130: old "get_kernel_syms" */
1158 .long _sys_quotactl
1159 .long _sys_getpgid
1160 .long _sys_fchdir
1161 .long _sys_bdflush
1162 .long _sys_ni_syscall /* 135 */ /* sys_sysfs */
1163 .long _sys_personality
1164 .long _sys_ni_syscall /* for afs_syscall */
1165 .long _sys_setfsuid /* setfsuid16 */
1166 .long _sys_setfsgid /* setfsgid16 */
1167 .long _sys_llseek /* 140 */
1168 .long _sys_getdents
1169 .long _sys_ni_syscall /* sys_select */
1170 .long _sys_flock
1171 .long _sys_ni_syscall /* sys_msync */
1172 .long _sys_readv /* 145 */
1173 .long _sys_writev
1174 .long _sys_getsid
1175 .long _sys_fdatasync
1176 .long _sys_sysctl
1177 .long _sys_ni_syscall /* 150 */ /* sys_mlock */
1178 .long _sys_ni_syscall /* sys_munlock */
1179 .long _sys_ni_syscall /* sys_mlockall */
1180 .long _sys_ni_syscall /* sys_munlockall */
1181 .long _sys_sched_setparam
1182 .long _sys_sched_getparam /* 155 */
1183 .long _sys_sched_setscheduler
1184 .long _sys_sched_getscheduler
1185 .long _sys_sched_yield
1186 .long _sys_sched_get_priority_max
1187 .long _sys_sched_get_priority_min /* 160 */
1188 .long _sys_sched_rr_get_interval
1189 .long _sys_nanosleep
1190 .long _sys_mremap
1191 .long _sys_setresuid /* setresuid16 */
1192 .long _sys_getresuid /* getresuid16 */ /* 165 */
1193 .long _sys_ni_syscall /* for vm86 */
1194 .long _sys_ni_syscall /* old "query_module" */
1195 .long _sys_ni_syscall /* sys_poll */
1196 .long _sys_nfsservctl
1197 .long _sys_setresgid /* setresgid16 */ /* 170 */
1198 .long _sys_getresgid /* getresgid16 */
1199 .long _sys_prctl
1200 .long _sys_rt_sigreturn
1201 .long _sys_rt_sigaction
1202 .long _sys_rt_sigprocmask /* 175 */
1203 .long _sys_rt_sigpending
1204 .long _sys_rt_sigtimedwait
1205 .long _sys_rt_sigqueueinfo
1206 .long _sys_rt_sigsuspend
1207 .long _sys_pread64 /* 180 */
1208 .long _sys_pwrite64
1209 .long _sys_lchown /* lchown16 */
1210 .long _sys_getcwd
1211 .long _sys_capget
1212 .long _sys_capset /* 185 */
1213 .long _sys_sigaltstack
1214 .long _sys_sendfile
1215 .long _sys_ni_syscall /* streams1 */
1216 .long _sys_ni_syscall /* streams2 */
1217 .long _sys_vfork /* 190 */
1218 .long _sys_getrlimit
1219 .long _sys_mmap2
1220 .long _sys_truncate64
1221 .long _sys_ftruncate64
1222 .long _sys_stat64 /* 195 */
1223 .long _sys_lstat64
1224 .long _sys_fstat64
1225 .long _sys_chown
1226 .long _sys_getuid
1227 .long _sys_getgid /* 200 */
1228 .long _sys_geteuid
1229 .long _sys_getegid
1230 .long _sys_setreuid
1231 .long _sys_setregid
1232 .long _sys_getgroups /* 205 */
1233 .long _sys_setgroups
1234 .long _sys_fchown
1235 .long _sys_setresuid
1236 .long _sys_getresuid
1237 .long _sys_setresgid /* 210 */
1238 .long _sys_getresgid
1239 .long _sys_lchown
1240 .long _sys_setuid
1241 .long _sys_setgid
1242 .long _sys_setfsuid /* 215 */
1243 .long _sys_setfsgid
1244 .long _sys_pivot_root
1245 .long _sys_ni_syscall /* sys_mincore */
1246 .long _sys_ni_syscall /* sys_madvise */
1247 .long _sys_getdents64 /* 220 */
1248 .long _sys_fcntl64
1249 .long _sys_ni_syscall /* reserved for TUX */
1250 .long _sys_ni_syscall
1251 .long _sys_gettid
1252 .long _sys_readahead /* 225 */
1253 .long _sys_setxattr
1254 .long _sys_lsetxattr
1255 .long _sys_fsetxattr
1256 .long _sys_getxattr
1257 .long _sys_lgetxattr /* 230 */
1258 .long _sys_fgetxattr
1259 .long _sys_listxattr
1260 .long _sys_llistxattr
1261 .long _sys_flistxattr
1262 .long _sys_removexattr /* 235 */
1263 .long _sys_lremovexattr
1264 .long _sys_fremovexattr
1265 .long _sys_tkill
1266 .long _sys_sendfile64
1267 .long _sys_futex /* 240 */
1268 .long _sys_sched_setaffinity
1269 .long _sys_sched_getaffinity
1270 .long _sys_ni_syscall /* sys_set_thread_area */
1271 .long _sys_ni_syscall /* sys_get_thread_area */
1272 .long _sys_io_setup /* 245 */
1273 .long _sys_io_destroy
1274 .long _sys_io_getevents
1275 .long _sys_io_submit
1276 .long _sys_io_cancel
1277 .long _sys_ni_syscall /* 250 */ /* sys_alloc_hugepages */
1278 .long _sys_ni_syscall /* sys_freec_hugepages */
1279 .long _sys_exit_group
1280 .long _sys_lookup_dcookie
1281 .long _sys_bfin_spinlock
1282 .long _sys_epoll_create /* 255 */
1283 .long _sys_epoll_ctl
1284 .long _sys_epoll_wait
1285 .long _sys_ni_syscall /* remap_file_pages */
1286 .long _sys_set_tid_address
1287 .long _sys_timer_create /* 260 */
1288 .long _sys_timer_settime
1289 .long _sys_timer_gettime
1290 .long _sys_timer_getoverrun
1291 .long _sys_timer_delete
1292 .long _sys_clock_settime /* 265 */
1293 .long _sys_clock_gettime
1294 .long _sys_clock_getres
1295 .long _sys_clock_nanosleep
1296 .long _sys_statfs64
1297 .long _sys_fstatfs64 /* 270 */
1298 .long _sys_tgkill
1299 .long _sys_utimes
1300 .long _sys_fadvise64_64
1301 .long _sys_ni_syscall /* vserver */
1302 .long _sys_ni_syscall /* 275, mbind */
1303 .long _sys_ni_syscall /* get_mempolicy */
1304 .long _sys_ni_syscall /* set_mempolicy */
1305 .long _sys_mq_open
1306 .long _sys_mq_unlink
1307 .long _sys_mq_timedsend /* 280 */
1308 .long _sys_mq_timedreceive
1309 .long _sys_mq_notify
1310 .long _sys_mq_getsetattr
1311 .long _sys_ni_syscall /* kexec_load */
1312 .long _sys_waitid /* 285 */
1313 .long _sys_add_key
1314 .long _sys_request_key
1315 .long _sys_keyctl
1316 .long _sys_ioprio_set
1317 .long _sys_ioprio_get /* 290 */
1318 .long _sys_inotify_init
1319 .long _sys_inotify_add_watch
1320 .long _sys_inotify_rm_watch
1321 .long _sys_ni_syscall /* migrate_pages */
1322 .long _sys_openat /* 295 */
1323 .long _sys_mkdirat
1324 .long _sys_mknodat
1325 .long _sys_fchownat
1326 .long _sys_futimesat
1327 .long _sys_fstatat64 /* 300 */
1328 .long _sys_unlinkat
1329 .long _sys_renameat
1330 .long _sys_linkat
1331 .long _sys_symlinkat
1332 .long _sys_readlinkat /* 305 */
1333 .long _sys_fchmodat
1334 .long _sys_faccessat
1335 .long _sys_pselect6
1336 .long _sys_ppoll
1337 .long _sys_unshare /* 310 */
1338 .long _sys_sram_alloc
1339 .long _sys_sram_free
1340 .long _sys_dma_memcpy
1341 .long _sys_accept
1342 .long _sys_bind /* 315 */
1343 .long _sys_connect
1344 .long _sys_getpeername
1345 .long _sys_getsockname
1346 .long _sys_getsockopt
1347 .long _sys_listen /* 320 */
1348 .long _sys_recv
1349 .long _sys_recvfrom
1350 .long _sys_recvmsg
1351 .long _sys_send
1352 .long _sys_sendmsg /* 325 */
1353 .long _sys_sendto
1354 .long _sys_setsockopt
1355 .long _sys_shutdown
1356 .long _sys_socket
1357 .long _sys_socketpair /* 330 */
1358 .long _sys_semctl
1359 .long _sys_semget
1360 .long _sys_semop
1361 .long _sys_msgctl
1362 .long _sys_msgget /* 335 */
1363 .long _sys_msgrcv
1364 .long _sys_msgsnd
1365 .long _sys_shmat
1366 .long _sys_shmctl
1367 .long _sys_shmdt /* 340 */
1368 .long _sys_shmget
1369 .long _sys_splice
1370 .long _sys_sync_file_range
1371 .long _sys_tee
1372 .long _sys_vmsplice /* 345 */
1373 .long _sys_epoll_pwait
1374 .long _sys_utimensat
1375 .long _sys_signalfd
1376 .long _sys_timerfd
1377 .long _sys_eventfd /* 350 */
1378 .long _sys_pread64
1379 .long _sys_pwrite64
1380 .long _sys_fadvise64
1381 .long _sys_set_robust_list
1382 .long _sys_get_robust_list /* 355 */
1383 .long _sys_fallocate
1384 .long _sys_semtimedop
1385 .rept NR_syscalls-(.-_sys_call_table)/4
1386 .long _sys_ni_syscall
1387 .endr
1388 _excpt_saved_imask:
1389 .long 0;
1391 _exception_stack:
1392 .rept 1024
1393 .long 0;
1394 .endr
1395 _exception_stack_top:
1397 #if ANOMALY_05000261
1398 /* Used by the assembly entry point to work around an anomaly. */
1399 _last_cplb_fault_retx:
1400 .long 0;
1401 #endif
1402 /*
1403 * Single instructions can have multiple faults, which need to be
1404 * handled by traps.c, in irq5. We store the exception cause to ensure
1405 * we don't miss a double fault condition
1406 */
1407 ENTRY(_in_ptr_excause)
1408 .long 0;
1409 ENTRY(_out_ptr_excause)
1410 .long 0;
1411 ALIGN
1412 ENTRY(_excause_circ_buf)
1413 .rept 4
1414 .long 0
1415 .endr