1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _ASM_POWERPC_INTERRUPT_H
3 #define _ASM_POWERPC_INTERRUPT_H
4
5 /* BookE/4xx */
6 #define INTERRUPT_CRITICAL_INPUT 0x100
7
8 /* BookE */
9 #define INTERRUPT_DEBUG 0xd00
10 #ifdef CONFIG_BOOKE
11 #define INTERRUPT_PERFMON 0x260
12 #define INTERRUPT_DOORBELL 0x280
13 #endif
14
15 /* BookS/4xx/8xx */
16 #define INTERRUPT_MACHINE_CHECK 0x200
17
18 /* BookS/8xx */
19 #define INTERRUPT_SYSTEM_RESET 0x100
20
21 /* BookS */
22 #define INTERRUPT_DATA_SEGMENT 0x380
23 #define INTERRUPT_INST_SEGMENT 0x480
24 #define INTERRUPT_TRACE 0xd00
25 #define INTERRUPT_H_DATA_STORAGE 0xe00
26 #define INTERRUPT_HMI 0xe60
27 #define INTERRUPT_H_FAC_UNAVAIL 0xf80
28 #ifdef CONFIG_PPC_BOOK3S
29 #define INTERRUPT_DOORBELL 0xa00
30 #define INTERRUPT_PERFMON 0xf00
31 #define INTERRUPT_ALTIVEC_UNAVAIL 0xf20
32 #endif
33
34 /* BookE/BookS/4xx/8xx */
35 #define INTERRUPT_DATA_STORAGE 0x300
36 #define INTERRUPT_INST_STORAGE 0x400
37 #define INTERRUPT_EXTERNAL 0x500
38 #define INTERRUPT_ALIGNMENT 0x600
39 #define INTERRUPT_PROGRAM 0x700
40 #define INTERRUPT_SYSCALL 0xc00
41 #define INTERRUPT_TRACE 0xd00
42
43 /* BookE/BookS/44x */
44 #define INTERRUPT_FP_UNAVAIL 0x800
45
46 /* BookE/BookS/44x/8xx */
47 #define INTERRUPT_DECREMENTER 0x900
48
49 #ifndef INTERRUPT_PERFMON
50 #define INTERRUPT_PERFMON 0x0
51 #endif
52
53 /* 8xx */
54 #define INTERRUPT_SOFT_EMU_8xx 0x1000
55 #define INTERRUPT_INST_TLB_MISS_8xx 0x1100
56 #define INTERRUPT_DATA_TLB_MISS_8xx 0x1200
57 #define INTERRUPT_INST_TLB_ERROR_8xx 0x1300
58 #define INTERRUPT_DATA_TLB_ERROR_8xx 0x1400
59 #define INTERRUPT_DATA_BREAKPOINT_8xx 0x1c00
60 #define INTERRUPT_INST_BREAKPOINT_8xx 0x1d00
61
62 /* 603 */
63 #define INTERRUPT_INST_TLB_MISS_603 0x1000
64 #define INTERRUPT_DATA_LOAD_TLB_MISS_603 0x1100
65 #define INTERRUPT_DATA_STORE_TLB_MISS_603 0x1200
66
67 #ifndef __ASSEMBLY__
68
69 #include <linux/context_tracking.h>
70 #include <linux/hardirq.h>
71 #include <asm/cputime.h>
72 #include <asm/ftrace.h>
73 #include <asm/kprobes.h>
74 #include <asm/runlatch.h>
75
76 #ifdef CONFIG_PPC_BOOK3S_64
77 extern char __end_soft_masked[];
78 bool search_kernel_soft_mask_table(unsigned long addr);
79 unsigned long search_kernel_restart_table(unsigned long addr);
80
81 DECLARE_STATIC_KEY_FALSE(interrupt_exit_not_reentrant);
82
is_implicit_soft_masked(struct pt_regs * regs)83 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
84 {
85 if (regs->msr & MSR_PR)
86 return false;
87
88 if (regs->nip >= (unsigned long)__end_soft_masked)
89 return false;
90
91 return search_kernel_soft_mask_table(regs->nip);
92 }
93
srr_regs_clobbered(void)94 static inline void srr_regs_clobbered(void)
95 {
96 local_paca->srr_valid = 0;
97 local_paca->hsrr_valid = 0;
98 }
99 #else
is_implicit_soft_masked(struct pt_regs * regs)100 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
101 {
102 return false;
103 }
104
srr_regs_clobbered(void)105 static inline void srr_regs_clobbered(void)
106 {
107 }
108 #endif
109
nap_adjust_return(struct pt_regs * regs)110 static inline void nap_adjust_return(struct pt_regs *regs)
111 {
112 #ifdef CONFIG_PPC_970_NAP
113 if (unlikely(test_thread_local_flags(_TLF_NAPPING))) {
114 /* Can avoid a test-and-clear because NMIs do not call this */
115 clear_thread_local_flags(_TLF_NAPPING);
116 regs_set_return_ip(regs, (unsigned long)power4_idle_nap_return);
117 }
118 #endif
119 }
120
121 struct interrupt_state {
122 };
123
booke_restore_dbcr0(void)124 static inline void booke_restore_dbcr0(void)
125 {
126 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
127 unsigned long dbcr0 = current->thread.debug.dbcr0;
128
129 if (IS_ENABLED(CONFIG_PPC32) && unlikely(dbcr0 & DBCR0_IDM)) {
130 mtspr(SPRN_DBSR, -1);
131 mtspr(SPRN_DBCR0, global_dbcr0[smp_processor_id()]);
132 }
133 #endif
134 }
135
interrupt_enter_prepare(struct pt_regs * regs,struct interrupt_state * state)136 static inline void interrupt_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
137 {
138 #ifdef CONFIG_PPC32
139 if (!arch_irq_disabled_regs(regs))
140 trace_hardirqs_off();
141
142 if (user_mode(regs)) {
143 kuep_lock();
144 account_cpu_user_entry();
145 } else {
146 kuap_save_and_lock(regs);
147 }
148 #endif
149
150 #ifdef CONFIG_PPC64
151 if (irq_soft_mask_set_return(IRQS_ALL_DISABLED) == IRQS_ENABLED)
152 trace_hardirqs_off();
153 local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
154
155 if (user_mode(regs)) {
156 CT_WARN_ON(ct_state() != CONTEXT_USER);
157 user_exit_irqoff();
158
159 account_cpu_user_entry();
160 account_stolen_time();
161 } else {
162 /*
163 * CT_WARN_ON comes here via program_check_exception,
164 * so avoid recursion.
165 */
166 if (TRAP(regs) != INTERRUPT_PROGRAM) {
167 CT_WARN_ON(ct_state() != CONTEXT_KERNEL);
168 BUG_ON(is_implicit_soft_masked(regs));
169 }
170 #ifdef CONFIG_PPC_BOOK3S
171 /* Move this under a debugging check */
172 if (arch_irq_disabled_regs(regs))
173 BUG_ON(search_kernel_restart_table(regs->nip));
174 #endif
175 }
176 if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
177 BUG_ON(!arch_irq_disabled_regs(regs) && !(regs->msr & MSR_EE));
178 #endif
179
180 booke_restore_dbcr0();
181 }
182
183 /*
184 * Care should be taken to note that interrupt_exit_prepare and
185 * interrupt_async_exit_prepare do not necessarily return immediately to
186 * regs context (e.g., if regs is usermode, we don't necessarily return to
187 * user mode). Other interrupts might be taken between here and return,
188 * context switch / preemption may occur in the exit path after this, or a
189 * signal may be delivered, etc.
190 *
191 * The real interrupt exit code is platform specific, e.g.,
192 * interrupt_exit_user_prepare / interrupt_exit_kernel_prepare for 64s.
193 *
194 * However interrupt_nmi_exit_prepare does return directly to regs, because
195 * NMIs do not do "exit work" or replay soft-masked interrupts.
196 */
interrupt_exit_prepare(struct pt_regs * regs,struct interrupt_state * state)197 static inline void interrupt_exit_prepare(struct pt_regs *regs, struct interrupt_state *state)
198 {
199 }
200
interrupt_async_enter_prepare(struct pt_regs * regs,struct interrupt_state * state)201 static inline void interrupt_async_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
202 {
203 #ifdef CONFIG_PPC_BOOK3S_64
204 if (cpu_has_feature(CPU_FTR_CTRL) &&
205 !test_thread_local_flags(_TLF_RUNLATCH))
206 __ppc64_runlatch_on();
207 #endif
208
209 interrupt_enter_prepare(regs, state);
210 irq_enter();
211 }
212
interrupt_async_exit_prepare(struct pt_regs * regs,struct interrupt_state * state)213 static inline void interrupt_async_exit_prepare(struct pt_regs *regs, struct interrupt_state *state)
214 {
215 /*
216 * Adjust at exit so the main handler sees the true NIA. This must
217 * come before irq_exit() because irq_exit can enable interrupts, and
218 * if another interrupt is taken before nap_adjust_return has run
219 * here, then that interrupt would return directly to idle nap return.
220 */
221 nap_adjust_return(regs);
222
223 irq_exit();
224 interrupt_exit_prepare(regs, state);
225 }
226
227 struct interrupt_nmi_state {
228 #ifdef CONFIG_PPC64
229 u8 irq_soft_mask;
230 u8 irq_happened;
231 u8 ftrace_enabled;
232 u64 softe;
233 #endif
234 };
235
nmi_disables_ftrace(struct pt_regs * regs)236 static inline bool nmi_disables_ftrace(struct pt_regs *regs)
237 {
238 /* Allow DEC and PMI to be traced when they are soft-NMI */
239 if (IS_ENABLED(CONFIG_PPC_BOOK3S_64)) {
240 if (TRAP(regs) == INTERRUPT_DECREMENTER)
241 return false;
242 if (TRAP(regs) == INTERRUPT_PERFMON)
243 return false;
244 }
245 if (IS_ENABLED(CONFIG_PPC_BOOK3E)) {
246 if (TRAP(regs) == INTERRUPT_PERFMON)
247 return false;
248 }
249
250 return true;
251 }
252
interrupt_nmi_enter_prepare(struct pt_regs * regs,struct interrupt_nmi_state * state)253 static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
254 {
255 #ifdef CONFIG_PPC64
256 state->irq_soft_mask = local_paca->irq_soft_mask;
257 state->irq_happened = local_paca->irq_happened;
258 state->softe = regs->softe;
259
260 /*
261 * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
262 * the right thing, and set IRQ_HARD_DIS. We do not want to reconcile
263 * because that goes through irq tracing which we don't want in NMI.
264 */
265 local_paca->irq_soft_mask = IRQS_ALL_DISABLED;
266 local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
267
268 if (!(regs->msr & MSR_EE) || is_implicit_soft_masked(regs)) {
269 /*
270 * Adjust regs->softe to be soft-masked if it had not been
271 * reconcied (e.g., interrupt entry with MSR[EE]=0 but softe
272 * not yet set disabled), or if it was in an implicit soft
273 * masked state. This makes arch_irq_disabled_regs(regs)
274 * behave as expected.
275 */
276 regs->softe = IRQS_ALL_DISABLED;
277 }
278
279 /* Don't do any per-CPU operations until interrupt state is fixed */
280
281 if (nmi_disables_ftrace(regs)) {
282 state->ftrace_enabled = this_cpu_get_ftrace_enabled();
283 this_cpu_set_ftrace_enabled(0);
284 }
285 #endif
286
287 /*
288 * Do not use nmi_enter() for pseries hash guest taking a real-mode
289 * NMI because not everything it touches is within the RMA limit.
290 */
291 if (!IS_ENABLED(CONFIG_PPC_BOOK3S_64) ||
292 !firmware_has_feature(FW_FEATURE_LPAR) ||
293 radix_enabled() || (mfmsr() & MSR_DR))
294 nmi_enter();
295 }
296
interrupt_nmi_exit_prepare(struct pt_regs * regs,struct interrupt_nmi_state * state)297 static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
298 {
299 if (!IS_ENABLED(CONFIG_PPC_BOOK3S_64) ||
300 !firmware_has_feature(FW_FEATURE_LPAR) ||
301 radix_enabled() || (mfmsr() & MSR_DR))
302 nmi_exit();
303
304 /*
305 * nmi does not call nap_adjust_return because nmi should not create
306 * new work to do (must use irq_work for that).
307 */
308
309 #ifdef CONFIG_PPC64
310 #ifdef CONFIG_PPC_BOOK3S
311 if (arch_irq_disabled_regs(regs)) {
312 unsigned long rst = search_kernel_restart_table(regs->nip);
313 if (rst)
314 regs_set_return_ip(regs, rst);
315 }
316 #endif
317
318 if (nmi_disables_ftrace(regs))
319 this_cpu_set_ftrace_enabled(state->ftrace_enabled);
320
321 /* Check we didn't change the pending interrupt mask. */
322 WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened);
323 regs->softe = state->softe;
324 local_paca->irq_happened = state->irq_happened;
325 local_paca->irq_soft_mask = state->irq_soft_mask;
326 #endif
327 }
328
329 /*
330 * Don't use noinstr here like x86, but rather add NOKPROBE_SYMBOL to each
331 * function definition. The reason for this is the noinstr section is placed
332 * after the main text section, i.e., very far away from the interrupt entry
333 * asm. That creates problems with fitting linker stubs when building large
334 * kernels.
335 */
336 #define interrupt_handler __visible noinline notrace __no_kcsan __no_sanitize_address
337
338 /**
339 * DECLARE_INTERRUPT_HANDLER_RAW - Declare raw interrupt handler function
340 * @func: Function name of the entry point
341 * @returns: Returns a value back to asm caller
342 */
343 #define DECLARE_INTERRUPT_HANDLER_RAW(func) \
344 __visible long func(struct pt_regs *regs)
345
346 /**
347 * DEFINE_INTERRUPT_HANDLER_RAW - Define raw interrupt handler function
348 * @func: Function name of the entry point
349 * @returns: Returns a value back to asm caller
350 *
351 * @func is called from ASM entry code.
352 *
353 * This is a plain function which does no tracing, reconciling, etc.
354 * The macro is written so it acts as function definition. Append the
355 * body with a pair of curly brackets.
356 *
357 * raw interrupt handlers must not enable or disable interrupts, or
358 * schedule, tracing and instrumentation (ftrace, lockdep, etc) would
359 * not be advisable either, although may be possible in a pinch, the
360 * trace will look odd at least.
361 *
362 * A raw handler may call one of the other interrupt handler functions
363 * to be converted into that interrupt context without these restrictions.
364 *
365 * On PPC64, _RAW handlers may return with fast_interrupt_return.
366 *
367 * Specific handlers may have additional restrictions.
368 */
369 #define DEFINE_INTERRUPT_HANDLER_RAW(func) \
370 static __always_inline long ____##func(struct pt_regs *regs); \
371 \
372 interrupt_handler long func(struct pt_regs *regs) \
373 { \
374 long ret; \
375 \
376 ret = ____##func (regs); \
377 \
378 return ret; \
379 } \
380 NOKPROBE_SYMBOL(func); \
381 \
382 static __always_inline long ____##func(struct pt_regs *regs)
383
384 /**
385 * DECLARE_INTERRUPT_HANDLER - Declare synchronous interrupt handler function
386 * @func: Function name of the entry point
387 */
388 #define DECLARE_INTERRUPT_HANDLER(func) \
389 __visible void func(struct pt_regs *regs)
390
391 /**
392 * DEFINE_INTERRUPT_HANDLER - Define synchronous interrupt handler function
393 * @func: Function name of the entry point
394 *
395 * @func is called from ASM entry code.
396 *
397 * The macro is written so it acts as function definition. Append the
398 * body with a pair of curly brackets.
399 */
400 #define DEFINE_INTERRUPT_HANDLER(func) \
401 static __always_inline void ____##func(struct pt_regs *regs); \
402 \
403 interrupt_handler void func(struct pt_regs *regs) \
404 { \
405 struct interrupt_state state; \
406 \
407 interrupt_enter_prepare(regs, &state); \
408 \
409 ____##func (regs); \
410 \
411 interrupt_exit_prepare(regs, &state); \
412 } \
413 NOKPROBE_SYMBOL(func); \
414 \
415 static __always_inline void ____##func(struct pt_regs *regs)
416
417 /**
418 * DECLARE_INTERRUPT_HANDLER_RET - Declare synchronous interrupt handler function
419 * @func: Function name of the entry point
420 * @returns: Returns a value back to asm caller
421 */
422 #define DECLARE_INTERRUPT_HANDLER_RET(func) \
423 __visible long func(struct pt_regs *regs)
424
425 /**
426 * DEFINE_INTERRUPT_HANDLER_RET - Define synchronous interrupt handler function
427 * @func: Function name of the entry point
428 * @returns: Returns a value back to asm caller
429 *
430 * @func is called from ASM entry code.
431 *
432 * The macro is written so it acts as function definition. Append the
433 * body with a pair of curly brackets.
434 */
435 #define DEFINE_INTERRUPT_HANDLER_RET(func) \
436 static __always_inline long ____##func(struct pt_regs *regs); \
437 \
438 interrupt_handler long func(struct pt_regs *regs) \
439 { \
440 struct interrupt_state state; \
441 long ret; \
442 \
443 interrupt_enter_prepare(regs, &state); \
444 \
445 ret = ____##func (regs); \
446 \
447 interrupt_exit_prepare(regs, &state); \
448 \
449 return ret; \
450 } \
451 NOKPROBE_SYMBOL(func); \
452 \
453 static __always_inline long ____##func(struct pt_regs *regs)
454
455 /**
456 * DECLARE_INTERRUPT_HANDLER_ASYNC - Declare asynchronous interrupt handler function
457 * @func: Function name of the entry point
458 */
459 #define DECLARE_INTERRUPT_HANDLER_ASYNC(func) \
460 __visible void func(struct pt_regs *regs)
461
462 /**
463 * DEFINE_INTERRUPT_HANDLER_ASYNC - Define asynchronous interrupt handler function
464 * @func: Function name of the entry point
465 *
466 * @func is called from ASM entry code.
467 *
468 * The macro is written so it acts as function definition. Append the
469 * body with a pair of curly brackets.
470 */
471 #define DEFINE_INTERRUPT_HANDLER_ASYNC(func) \
472 static __always_inline void ____##func(struct pt_regs *regs); \
473 \
474 interrupt_handler void func(struct pt_regs *regs) \
475 { \
476 struct interrupt_state state; \
477 \
478 interrupt_async_enter_prepare(regs, &state); \
479 \
480 ____##func (regs); \
481 \
482 interrupt_async_exit_prepare(regs, &state); \
483 } \
484 NOKPROBE_SYMBOL(func); \
485 \
486 static __always_inline void ____##func(struct pt_regs *regs)
487
488 /**
489 * DECLARE_INTERRUPT_HANDLER_NMI - Declare NMI interrupt handler function
490 * @func: Function name of the entry point
491 * @returns: Returns a value back to asm caller
492 */
493 #define DECLARE_INTERRUPT_HANDLER_NMI(func) \
494 __visible long func(struct pt_regs *regs)
495
496 /**
497 * DEFINE_INTERRUPT_HANDLER_NMI - Define NMI interrupt handler function
498 * @func: Function name of the entry point
499 * @returns: Returns a value back to asm caller
500 *
501 * @func is called from ASM entry code.
502 *
503 * The macro is written so it acts as function definition. Append the
504 * body with a pair of curly brackets.
505 */
506 #define DEFINE_INTERRUPT_HANDLER_NMI(func) \
507 static __always_inline long ____##func(struct pt_regs *regs); \
508 \
509 interrupt_handler long func(struct pt_regs *regs) \
510 { \
511 struct interrupt_nmi_state state; \
512 long ret; \
513 \
514 interrupt_nmi_enter_prepare(regs, &state); \
515 \
516 ret = ____##func (regs); \
517 \
518 interrupt_nmi_exit_prepare(regs, &state); \
519 \
520 return ret; \
521 } \
522 NOKPROBE_SYMBOL(func); \
523 \
524 static __always_inline long ____##func(struct pt_regs *regs)
525
526
527 /* Interrupt handlers */
528 /* kernel/traps.c */
529 DECLARE_INTERRUPT_HANDLER_NMI(system_reset_exception);
530 #ifdef CONFIG_PPC_BOOK3S_64
531 DECLARE_INTERRUPT_HANDLER_ASYNC(machine_check_exception_async);
532 #endif
533 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_exception);
534 DECLARE_INTERRUPT_HANDLER(SMIException);
535 DECLARE_INTERRUPT_HANDLER(handle_hmi_exception);
536 DECLARE_INTERRUPT_HANDLER(unknown_exception);
537 DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
538 DECLARE_INTERRUPT_HANDLER_NMI(unknown_nmi_exception);
539 DECLARE_INTERRUPT_HANDLER(instruction_breakpoint_exception);
540 DECLARE_INTERRUPT_HANDLER(RunModeException);
541 DECLARE_INTERRUPT_HANDLER(single_step_exception);
542 DECLARE_INTERRUPT_HANDLER(program_check_exception);
543 DECLARE_INTERRUPT_HANDLER(emulation_assist_interrupt);
544 DECLARE_INTERRUPT_HANDLER(alignment_exception);
545 DECLARE_INTERRUPT_HANDLER(StackOverflow);
546 DECLARE_INTERRUPT_HANDLER(stack_overflow_exception);
547 DECLARE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception);
548 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_exception);
549 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_exception);
550 DECLARE_INTERRUPT_HANDLER(facility_unavailable_exception);
551 DECLARE_INTERRUPT_HANDLER(fp_unavailable_tm);
552 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_tm);
553 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_tm);
554 DECLARE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi);
555 DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async);
556 DECLARE_INTERRUPT_HANDLER_RAW(performance_monitor_exception);
557 DECLARE_INTERRUPT_HANDLER(DebugException);
558 DECLARE_INTERRUPT_HANDLER(altivec_assist_exception);
559 DECLARE_INTERRUPT_HANDLER(CacheLockingException);
560 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointException);
561 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointRoundException);
562 DECLARE_INTERRUPT_HANDLER_NMI(WatchdogException);
563 DECLARE_INTERRUPT_HANDLER(kernel_bad_stack);
564
565 /* slb.c */
566 DECLARE_INTERRUPT_HANDLER_RAW(do_slb_fault);
567 DECLARE_INTERRUPT_HANDLER(do_bad_slb_fault);
568
569 /* hash_utils.c */
570 DECLARE_INTERRUPT_HANDLER_RAW(do_hash_fault);
571
572 /* fault.c */
573 DECLARE_INTERRUPT_HANDLER(do_page_fault);
574 DECLARE_INTERRUPT_HANDLER(do_bad_page_fault_segv);
575
576 /* process.c */
577 DECLARE_INTERRUPT_HANDLER(do_break);
578
579 /* time.c */
580 DECLARE_INTERRUPT_HANDLER_ASYNC(timer_interrupt);
581
582 /* mce.c */
583 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_early);
584 DECLARE_INTERRUPT_HANDLER_NMI(hmi_exception_realmode);
585
586 DECLARE_INTERRUPT_HANDLER_ASYNC(TAUException);
587
588 /* irq.c */
589 DECLARE_INTERRUPT_HANDLER_ASYNC(do_IRQ);
590
591 void __noreturn unrecoverable_exception(struct pt_regs *regs);
592
593 void replay_system_reset(void);
594 void replay_soft_interrupts(void);
595
interrupt_cond_local_irq_enable(struct pt_regs * regs)596 static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
597 {
598 if (!arch_irq_disabled_regs(regs))
599 local_irq_enable();
600 }
601
602 #endif /* __ASSEMBLY__ */
603
604 #endif /* _ASM_POWERPC_INTERRUPT_H */
605