summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/include/asm/interrupt.h
blob: d4bdf7d274ac1492e703370ad20b64c6ce7a8a2d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _ASM_POWERPC_INTERRUPT_H
#define _ASM_POWERPC_INTERRUPT_H

/* BookE/4xx */
#define INTERRUPT_CRITICAL_INPUT  0x100

/* BookE */
#define INTERRUPT_DEBUG           0xd00
#ifdef CONFIG_BOOKE
#define INTERRUPT_PERFMON         0x260
#define INTERRUPT_DOORBELL        0x280
#endif

/* BookS/4xx/8xx */
#define INTERRUPT_MACHINE_CHECK   0x200

/* BookS/8xx */
#define INTERRUPT_SYSTEM_RESET    0x100

/* BookS */
#define INTERRUPT_DATA_SEGMENT    0x380
#define INTERRUPT_INST_SEGMENT    0x480
#define INTERRUPT_TRACE           0xd00
#define INTERRUPT_H_DATA_STORAGE  0xe00
#define INTERRUPT_HMI			0xe60
#define INTERRUPT_H_FAC_UNAVAIL   0xf80
#ifdef CONFIG_PPC_BOOK3S
#define INTERRUPT_DOORBELL        0xa00
#define INTERRUPT_PERFMON         0xf00
#define INTERRUPT_ALTIVEC_UNAVAIL	0xf20
#endif

/* BookE/BookS/4xx/8xx */
#define INTERRUPT_DATA_STORAGE    0x300
#define INTERRUPT_INST_STORAGE    0x400
#define INTERRUPT_EXTERNAL		0x500
#define INTERRUPT_ALIGNMENT       0x600
#define INTERRUPT_PROGRAM         0x700
#define INTERRUPT_SYSCALL         0xc00
#define INTERRUPT_TRACE			0xd00

/* BookE/BookS/44x */
#define INTERRUPT_FP_UNAVAIL      0x800

/* BookE/BookS/44x/8xx */
#define INTERRUPT_DECREMENTER     0x900

#ifndef INTERRUPT_PERFMON
#define INTERRUPT_PERFMON         0x0
#endif

/* 8xx */
#define INTERRUPT_SOFT_EMU_8xx		0x1000
#define INTERRUPT_INST_TLB_MISS_8xx	0x1100
#define INTERRUPT_DATA_TLB_MISS_8xx	0x1200
#define INTERRUPT_INST_TLB_ERROR_8xx	0x1300
#define INTERRUPT_DATA_TLB_ERROR_8xx	0x1400
#define INTERRUPT_DATA_BREAKPOINT_8xx	0x1c00
#define INTERRUPT_INST_BREAKPOINT_8xx	0x1d00

/* 603 */
#define INTERRUPT_INST_TLB_MISS_603		0x1000
#define INTERRUPT_DATA_LOAD_TLB_MISS_603	0x1100
#define INTERRUPT_DATA_STORE_TLB_MISS_603	0x1200

#ifndef __ASSEMBLY__

#include <linux/context_tracking.h>
#include <linux/hardirq.h>
#include <asm/cputime.h>
#include <asm/ftrace.h>
#include <asm/kprobes.h>
#include <asm/runlatch.h>

#ifdef CONFIG_PPC_BOOK3S_64
extern char __end_soft_masked[];
bool search_kernel_soft_mask_table(unsigned long addr);
unsigned long search_kernel_restart_table(unsigned long addr);

DECLARE_STATIC_KEY_FALSE(interrupt_exit_not_reentrant);

static inline bool is_implicit_soft_masked(struct pt_regs *regs)
{
	if (regs->msr & MSR_PR)
		return false;

	if (regs->nip >= (unsigned long)__end_soft_masked)
		return false;

	return search_kernel_soft_mask_table(regs->nip);
}

static inline void srr_regs_clobbered(void)
{
	local_paca->srr_valid = 0;
	local_paca->hsrr_valid = 0;
}
#else
static inline bool is_implicit_soft_masked(struct pt_regs *regs)
{
	return false;
}

static inline void srr_regs_clobbered(void)
{
}
#endif

static inline void nap_adjust_return(struct pt_regs *regs)
{
#ifdef CONFIG_PPC_970_NAP
	if (unlikely(test_thread_local_flags(_TLF_NAPPING))) {
		/* Can avoid a test-and-clear because NMIs do not call this */
		clear_thread_local_flags(_TLF_NAPPING);
		regs_set_return_ip(regs, (unsigned long)power4_idle_nap_return);
	}
#endif
}

struct interrupt_state {
};

static inline void booke_restore_dbcr0(void)
{
#ifdef CONFIG_PPC_ADV_DEBUG_REGS
	unsigned long dbcr0 = current->thread.debug.dbcr0;

	if (IS_ENABLED(CONFIG_PPC32) && unlikely(dbcr0 & DBCR0_IDM)) {
		mtspr(SPRN_DBSR, -1);
		mtspr(SPRN_DBCR0, global_dbcr0[smp_processor_id()]);
	}
#endif
}

static inline void interrupt_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
#ifdef CONFIG_PPC32
	if (!arch_irq_disabled_regs(regs))
		trace_hardirqs_off();

	if (user_mode(regs)) {
		kuep_lock();
		account_cpu_user_entry();
	} else {
		kuap_save_and_lock(regs);
	}
#endif

#ifdef CONFIG_PPC64
	if (irq_soft_mask_set_return(IRQS_ALL_DISABLED) == IRQS_ENABLED)
		trace_hardirqs_off();
	local_paca->irq_happened |= PACA_IRQ_HARD_DIS;

	if (user_mode(regs)) {
		CT_WARN_ON(ct_state() != CONTEXT_USER);
		user_exit_irqoff();

		account_cpu_user_entry();
		account_stolen_time();
	} else {
		/*
		 * CT_WARN_ON comes here via program_check_exception,
		 * so avoid recursion.
		 */
		if (TRAP(regs) != INTERRUPT_PROGRAM) {
			CT_WARN_ON(ct_state() != CONTEXT_KERNEL);
			BUG_ON(is_implicit_soft_masked(regs));
		}
#ifdef CONFIG_PPC_BOOK3S
		/* Move this under a debugging check */
		if (arch_irq_disabled_regs(regs))
			BUG_ON(search_kernel_restart_table(regs->nip));
#endif
	}
	if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
		BUG_ON(!arch_irq_disabled_regs(regs) && !(regs->msr & MSR_EE));
#endif

	booke_restore_dbcr0();
}

/*
 * Care should be taken to note that interrupt_exit_prepare and
 * interrupt_async_exit_prepare do not necessarily return immediately to
 * regs context (e.g., if regs is usermode, we don't necessarily return to
 * user mode). Other interrupts might be taken between here and return,
 * context switch / preemption may occur in the exit path after this, or a
 * signal may be delivered, etc.
 *
 * The real interrupt exit code is platform specific, e.g.,
 * interrupt_exit_user_prepare / interrupt_exit_kernel_prepare for 64s.
 *
 * However interrupt_nmi_exit_prepare does return directly to regs, because
 * NMIs do not do "exit work" or replay soft-masked interrupts.
 */
static inline void interrupt_exit_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
}

static inline void interrupt_async_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
#ifdef CONFIG_PPC_BOOK3S_64
	if (cpu_has_feature(CPU_FTR_CTRL) &&
	    !test_thread_local_flags(_TLF_RUNLATCH))
		__ppc64_runlatch_on();
#endif

	interrupt_enter_prepare(regs, state);
	irq_enter();
}

static inline void interrupt_async_exit_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
	/*
	 * Adjust at exit so the main handler sees the true NIA. This must
	 * come before irq_exit() because irq_exit can enable interrupts, and
	 * if another interrupt is taken before nap_adjust_return has run
	 * here, then that interrupt would return directly to idle nap return.
	 */
	nap_adjust_return(regs);

	irq_exit();
	interrupt_exit_prepare(regs, state);
}

struct interrupt_nmi_state {
#ifdef CONFIG_PPC64
	u8 irq_soft_mask;
	u8 irq_happened;
	u8 ftrace_enabled;
	u64 softe;
#endif
};

static inline bool nmi_disables_ftrace(struct pt_regs *regs)
{
	/* Allow DEC and PMI to be traced when they are soft-NMI */
	if (IS_ENABLED(CONFIG_PPC_BOOK3S_64)) {
		if (TRAP(regs) == INTERRUPT_DECREMENTER)
		       return false;
		if (TRAP(regs) == INTERRUPT_PERFMON)
		       return false;
	}
	if (IS_ENABLED(CONFIG_PPC_BOOK3E)) {
		if (TRAP(regs) == INTERRUPT_PERFMON)
			return false;
	}

	return true;
}

static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
{
#ifdef CONFIG_PPC64
	state->irq_soft_mask = local_paca->irq_soft_mask;
	state->irq_happened = local_paca->irq_happened;
	state->softe = regs->softe;

	/*
	 * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
	 * the right thing, and set IRQ_HARD_DIS. We do not want to reconcile
	 * because that goes through irq tracing which we don't want in NMI.
	 */
	local_paca->irq_soft_mask = IRQS_ALL_DISABLED;
	local_paca->irq_happened |= PACA_IRQ_HARD_DIS;

	if (is_implicit_soft_masked(regs)) {
		// Adjust regs->softe soft implicit soft-mask, so
		// arch_irq_disabled_regs(regs) behaves as expected.
		regs->softe = IRQS_ALL_DISABLED;
	}
	if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
		BUG_ON(!arch_irq_disabled_regs(regs) && !(regs->msr & MSR_EE));

	/* Don't do any per-CPU operations until interrupt state is fixed */

	if (nmi_disables_ftrace(regs)) {
		state->ftrace_enabled = this_cpu_get_ftrace_enabled();
		this_cpu_set_ftrace_enabled(0);
	}
#endif

	/*
	 * Do not use nmi_enter() for pseries hash guest taking a real-mode
	 * NMI because not everything it touches is within the RMA limit.
	 */
	if (!IS_ENABLED(CONFIG_PPC_BOOK3S_64) ||
			!firmware_has_feature(FW_FEATURE_LPAR) ||
			radix_enabled() || (mfmsr() & MSR_DR))
		nmi_enter();
}

static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
{
	if (!IS_ENABLED(CONFIG_PPC_BOOK3S_64) ||
			!firmware_has_feature(FW_FEATURE_LPAR) ||
			radix_enabled() || (mfmsr() & MSR_DR))
		nmi_exit();

	/*
	 * nmi does not call nap_adjust_return because nmi should not create
	 * new work to do (must use irq_work for that).
	 */

#ifdef CONFIG_PPC64
#ifdef CONFIG_PPC_BOOK3S
	if (arch_irq_disabled_regs(regs)) {
		unsigned long rst = search_kernel_restart_table(regs->nip);
		if (rst)
			regs_set_return_ip(regs, rst);
	}
#endif

	if (nmi_disables_ftrace(regs))
		this_cpu_set_ftrace_enabled(state->ftrace_enabled);

	/* Check we didn't change the pending interrupt mask. */
	WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened);
	regs->softe = state->softe;
	local_paca->irq_happened = state->irq_happened;
	local_paca->irq_soft_mask = state->irq_soft_mask;
#endif
}

/*
 * Don't use noinstr here like x86, but rather add NOKPROBE_SYMBOL to each
 * function definition. The reason for this is the noinstr section is placed
 * after the main text section, i.e., very far away from the interrupt entry
 * asm. That creates problems with fitting linker stubs when building large
 * kernels.
 */
#define interrupt_handler __visible noinline notrace __no_kcsan __no_sanitize_address

/**
 * DECLARE_INTERRUPT_HANDLER_RAW - Declare raw interrupt handler function
 * @func:	Function name of the entry point
 * @returns:	Returns a value back to asm caller
 */
#define DECLARE_INTERRUPT_HANDLER_RAW(func)				\
	__visible long func(struct pt_regs *regs)

/**
 * DEFINE_INTERRUPT_HANDLER_RAW - Define raw interrupt handler function
 * @func:	Function name of the entry point
 * @returns:	Returns a value back to asm caller
 *
 * @func is called from ASM entry code.
 *
 * This is a plain function which does no tracing, reconciling, etc.
 * The macro is written so it acts as function definition. Append the
 * body with a pair of curly brackets.
 *
 * raw interrupt handlers must not enable or disable interrupts, or
 * schedule, tracing and instrumentation (ftrace, lockdep, etc) would
 * not be advisable either, although may be possible in a pinch, the
 * trace will look odd at least.
 *
 * A raw handler may call one of the other interrupt handler functions
 * to be converted into that interrupt context without these restrictions.
 *
 * On PPC64, _RAW handlers may return with fast_interrupt_return.
 *
 * Specific handlers may have additional restrictions.
 */
#define DEFINE_INTERRUPT_HANDLER_RAW(func)				\
static __always_inline long ____##func(struct pt_regs *regs);		\
									\
interrupt_handler long func(struct pt_regs *regs)			\
{									\
	long ret;							\
									\
	ret = ____##func (regs);					\
									\
	return ret;							\
}									\
NOKPROBE_SYMBOL(func);							\
									\
static __always_inline long ____##func(struct pt_regs *regs)

/**
 * DECLARE_INTERRUPT_HANDLER - Declare synchronous interrupt handler function
 * @func:	Function name of the entry point
 */
#define DECLARE_INTERRUPT_HANDLER(func)					\
	__visible void func(struct pt_regs *regs)

/**
 * DEFINE_INTERRUPT_HANDLER - Define synchronous interrupt handler function
 * @func:	Function name of the entry point
 *
 * @func is called from ASM entry code.
 *
 * The macro is written so it acts as function definition. Append the
 * body with a pair of curly brackets.
 */
#define DEFINE_INTERRUPT_HANDLER(func)					\
static __always_inline void ____##func(struct pt_regs *regs);		\
									\
interrupt_handler void func(struct pt_regs *regs)			\
{									\
	struct interrupt_state state;					\
									\
	interrupt_enter_prepare(regs, &state);				\
									\
	____##func (regs);						\
									\
	interrupt_exit_prepare(regs, &state);				\
}									\
NOKPROBE_SYMBOL(func);							\
									\
static __always_inline void ____##func(struct pt_regs *regs)

/**
 * DECLARE_INTERRUPT_HANDLER_RET - Declare synchronous interrupt handler function
 * @func:	Function name of the entry point
 * @returns:	Returns a value back to asm caller
 */
#define DECLARE_INTERRUPT_HANDLER_RET(func)				\
	__visible long func(struct pt_regs *regs)

/**
 * DEFINE_INTERRUPT_HANDLER_RET - Define synchronous interrupt handler function
 * @func:	Function name of the entry point
 * @returns:	Returns a value back to asm caller
 *
 * @func is called from ASM entry code.
 *
 * The macro is written so it acts as function definition. Append the
 * body with a pair of curly brackets.
 */
#define DEFINE_INTERRUPT_HANDLER_RET(func)				\
static __always_inline long ____##func(struct pt_regs *regs);		\
									\
interrupt_handler long func(struct pt_regs *regs)			\
{									\
	struct interrupt_state state;					\
	long ret;							\
									\
	interrupt_enter_prepare(regs, &state);				\
									\
	ret = ____##func (regs);					\
									\
	interrupt_exit_prepare(regs, &state);				\
									\
	return ret;							\
}									\
NOKPROBE_SYMBOL(func);							\
									\
static __always_inline long ____##func(struct pt_regs *regs)

/**
 * DECLARE_INTERRUPT_HANDLER_ASYNC - Declare asynchronous interrupt handler function
 * @func:	Function name of the entry point
 */
#define DECLARE_INTERRUPT_HANDLER_ASYNC(func)				\
	__visible void func(struct pt_regs *regs)

/**
 * DEFINE_INTERRUPT_HANDLER_ASYNC - Define asynchronous interrupt handler function
 * @func:	Function name of the entry point
 *
 * @func is called from ASM entry code.
 *
 * The macro is written so it acts as function definition. Append the
 * body with a pair of curly brackets.
 */
#define DEFINE_INTERRUPT_HANDLER_ASYNC(func)				\
static __always_inline void ____##func(struct pt_regs *regs);		\
									\
interrupt_handler void func(struct pt_regs *regs)			\
{									\
	struct interrupt_state state;					\
									\
	interrupt_async_enter_prepare(regs, &state);			\
									\
	____##func (regs);						\
									\
	interrupt_async_exit_prepare(regs, &state);			\
}									\
NOKPROBE_SYMBOL(func);							\
									\
static __always_inline void ____##func(struct pt_regs *regs)

/**
 * DECLARE_INTERRUPT_HANDLER_NMI - Declare NMI interrupt handler function
 * @func:	Function name of the entry point
 * @returns:	Returns a value back to asm caller
 */
#define DECLARE_INTERRUPT_HANDLER_NMI(func)				\
	__visible long func(struct pt_regs *regs)

/**
 * DEFINE_INTERRUPT_HANDLER_NMI - Define NMI interrupt handler function
 * @func:	Function name of the entry point
 * @returns:	Returns a value back to asm caller
 *
 * @func is called from ASM entry code.
 *
 * The macro is written so it acts as function definition. Append the
 * body with a pair of curly brackets.
 */
#define DEFINE_INTERRUPT_HANDLER_NMI(func)				\
static __always_inline long ____##func(struct pt_regs *regs);		\
									\
interrupt_handler long func(struct pt_regs *regs)			\
{									\
	struct interrupt_nmi_state state;				\
	long ret;							\
									\
	interrupt_nmi_enter_prepare(regs, &state);			\
									\
	ret = ____##func (regs);					\
									\
	interrupt_nmi_exit_prepare(regs, &state);			\
									\
	return ret;							\
}									\
NOKPROBE_SYMBOL(func);							\
									\
static __always_inline long ____##func(struct pt_regs *regs)


/* Interrupt handlers */
/* kernel/traps.c */
DECLARE_INTERRUPT_HANDLER_NMI(system_reset_exception);
#ifdef CONFIG_PPC_BOOK3S_64
DECLARE_INTERRUPT_HANDLER_ASYNC(machine_check_exception);
#else
DECLARE_INTERRUPT_HANDLER_NMI(machine_check_exception);
#endif
DECLARE_INTERRUPT_HANDLER(SMIException);
DECLARE_INTERRUPT_HANDLER(handle_hmi_exception);
DECLARE_INTERRUPT_HANDLER(unknown_exception);
DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
DECLARE_INTERRUPT_HANDLER_NMI(unknown_nmi_exception);
DECLARE_INTERRUPT_HANDLER(instruction_breakpoint_exception);
DECLARE_INTERRUPT_HANDLER(RunModeException);
DECLARE_INTERRUPT_HANDLER(single_step_exception);
DECLARE_INTERRUPT_HANDLER(program_check_exception);
DECLARE_INTERRUPT_HANDLER(emulation_assist_interrupt);
DECLARE_INTERRUPT_HANDLER(alignment_exception);
DECLARE_INTERRUPT_HANDLER(StackOverflow);
DECLARE_INTERRUPT_HANDLER(stack_overflow_exception);
DECLARE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception);
DECLARE_INTERRUPT_HANDLER(altivec_unavailable_exception);
DECLARE_INTERRUPT_HANDLER(vsx_unavailable_exception);
DECLARE_INTERRUPT_HANDLER(facility_unavailable_exception);
DECLARE_INTERRUPT_HANDLER(fp_unavailable_tm);
DECLARE_INTERRUPT_HANDLER(altivec_unavailable_tm);
DECLARE_INTERRUPT_HANDLER(vsx_unavailable_tm);
DECLARE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi);
DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async);
DECLARE_INTERRUPT_HANDLER_RAW(performance_monitor_exception);
DECLARE_INTERRUPT_HANDLER(DebugException);
DECLARE_INTERRUPT_HANDLER(altivec_assist_exception);
DECLARE_INTERRUPT_HANDLER(CacheLockingException);
DECLARE_INTERRUPT_HANDLER(SPEFloatingPointException);
DECLARE_INTERRUPT_HANDLER(SPEFloatingPointRoundException);
DECLARE_INTERRUPT_HANDLER_NMI(WatchdogException);
DECLARE_INTERRUPT_HANDLER(kernel_bad_stack);

/* slb.c */
DECLARE_INTERRUPT_HANDLER_RAW(do_slb_fault);
DECLARE_INTERRUPT_HANDLER(do_bad_slb_fault);

/* hash_utils.c */
DECLARE_INTERRUPT_HANDLER_RAW(do_hash_fault);

/* fault.c */
DECLARE_INTERRUPT_HANDLER(do_page_fault);
DECLARE_INTERRUPT_HANDLER(do_bad_page_fault_segv);

/* process.c */
DECLARE_INTERRUPT_HANDLER(do_break);

/* time.c */
DECLARE_INTERRUPT_HANDLER_ASYNC(timer_interrupt);

/* mce.c */
DECLARE_INTERRUPT_HANDLER_NMI(machine_check_early);
DECLARE_INTERRUPT_HANDLER_NMI(hmi_exception_realmode);

DECLARE_INTERRUPT_HANDLER_ASYNC(TAUException);

void __noreturn unrecoverable_exception(struct pt_regs *regs);

void replay_system_reset(void);
void replay_soft_interrupts(void);

static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
{
	if (!arch_irq_disabled_regs(regs))
		local_irq_enable();
}

#endif /* __ASSEMBLY__ */

#endif /* _ASM_POWERPC_INTERRUPT_H */