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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/firmware.h>
73#include <asm/ftrace.h>
74#include <asm/kprobes.h>
75#include <asm/runlatch.h>
76
77#ifdef CONFIG_PPC_IRQ_SOFT_MASK_DEBUG
78/*
79 * WARN/BUG is handled with a program interrupt so minimise checks here to
80 * avoid recursion and maximise the chance of getting the first oops handled.
81 */
82#define INT_SOFT_MASK_BUG_ON(regs, cond) \
83do { \
84 if ((user_mode(regs) || (TRAP(regs) != INTERRUPT_PROGRAM))) \
85 BUG_ON(cond); \
86} while (0)
87#else
88#define INT_SOFT_MASK_BUG_ON(regs, cond)
89#endif
90
91#ifdef CONFIG_PPC_BOOK3S_64
92extern char __end_soft_masked[];
93bool search_kernel_soft_mask_table(unsigned long addr);
94unsigned long search_kernel_restart_table(unsigned long addr);
95
96DECLARE_STATIC_KEY_FALSE(interrupt_exit_not_reentrant);
97
98static inline bool is_implicit_soft_masked(struct pt_regs *regs)
99{
100 if (user_mode(regs))
101 return false;
102
103 if (regs->nip >= (unsigned long)__end_soft_masked)
104 return false;
105
106 return search_kernel_soft_mask_table(regs->nip);
107}
108
109static inline void srr_regs_clobbered(void)
110{
111 local_paca->srr_valid = 0;
112 local_paca->hsrr_valid = 0;
113}
114#else
115static inline unsigned long search_kernel_restart_table(unsigned long addr)
116{
117 return 0;
118}
119
120static inline bool is_implicit_soft_masked(struct pt_regs *regs)
121{
122 return false;
123}
124
125static inline void srr_regs_clobbered(void)
126{
127}
128#endif
129
130static inline void nap_adjust_return(struct pt_regs *regs)
131{
132#ifdef CONFIG_PPC_970_NAP
133 if (unlikely(test_thread_local_flags(_TLF_NAPPING))) {
134 /* Can avoid a test-and-clear because NMIs do not call this */
135 clear_thread_local_flags(_TLF_NAPPING);
136 regs_set_return_ip(regs, (unsigned long)power4_idle_nap_return);
137 }
138#endif
139}
140
141static inline void booke_restore_dbcr0(void)
142{
143#ifdef CONFIG_PPC_ADV_DEBUG_REGS
144 unsigned long dbcr0 = current->thread.debug.dbcr0;
145
146 if (IS_ENABLED(CONFIG_PPC32) && unlikely(dbcr0 & DBCR0_IDM)) {
147 mtspr(SPRN_DBSR, -1);
148 mtspr(SPRN_DBCR0, global_dbcr0[smp_processor_id()]);
149 }
150#endif
151}
152
153static inline void interrupt_enter_prepare(struct pt_regs *regs)
154{
155#ifdef CONFIG_PPC64
156 irq_soft_mask_set(IRQS_ALL_DISABLED);
157
158 /*
159 * If the interrupt was taken with HARD_DIS clear, then enable MSR[EE].
160 * Asynchronous interrupts get here with HARD_DIS set (see below), so
161 * this enables MSR[EE] for synchronous interrupts. IRQs remain
162 * soft-masked. The interrupt handler may later call
163 * interrupt_cond_local_irq_enable() to achieve a regular process
164 * context.
165 */
166 if (!(local_paca->irq_happened & PACA_IRQ_HARD_DIS)) {
167 INT_SOFT_MASK_BUG_ON(regs, !(regs->msr & MSR_EE));
168 __hard_irq_enable();
169 } else {
170 __hard_RI_enable();
171 }
172 /* Enable MSR[RI] early, to support kernel SLB and hash faults */
173#endif
174
175 if (!arch_irq_disabled_regs(regs))
176 trace_hardirqs_off();
177
178 if (user_mode(regs)) {
179 kuap_lock();
180 CT_WARN_ON(ct_state() != CONTEXT_USER);
181 user_exit_irqoff();
182
183 account_cpu_user_entry();
184 account_stolen_time();
185 } else {
186 kuap_save_and_lock(regs);
187 /*
188 * CT_WARN_ON comes here via program_check_exception,
189 * so avoid recursion.
190 */
191 if (TRAP(regs) != INTERRUPT_PROGRAM)
192 CT_WARN_ON(ct_state() != CONTEXT_KERNEL &&
193 ct_state() != CONTEXT_IDLE);
194 INT_SOFT_MASK_BUG_ON(regs, is_implicit_soft_masked(regs));
195 INT_SOFT_MASK_BUG_ON(regs, arch_irq_disabled_regs(regs) &&
196 search_kernel_restart_table(regs->nip));
197 }
198 INT_SOFT_MASK_BUG_ON(regs, !arch_irq_disabled_regs(regs) &&
199 !(regs->msr & MSR_EE));
200
201 booke_restore_dbcr0();
202}
203
204/*
205 * Care should be taken to note that interrupt_exit_prepare and
206 * interrupt_async_exit_prepare do not necessarily return immediately to
207 * regs context (e.g., if regs is usermode, we don't necessarily return to
208 * user mode). Other interrupts might be taken between here and return,
209 * context switch / preemption may occur in the exit path after this, or a
210 * signal may be delivered, etc.
211 *
212 * The real interrupt exit code is platform specific, e.g.,
213 * interrupt_exit_user_prepare / interrupt_exit_kernel_prepare for 64s.
214 *
215 * However interrupt_nmi_exit_prepare does return directly to regs, because
216 * NMIs do not do "exit work" or replay soft-masked interrupts.
217 */
218static inline void interrupt_exit_prepare(struct pt_regs *regs)
219{
220}
221
222static inline void interrupt_async_enter_prepare(struct pt_regs *regs)
223{
224#ifdef CONFIG_PPC64
225 /* Ensure interrupt_enter_prepare does not enable MSR[EE] */
226 local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
227#endif
228 interrupt_enter_prepare(regs);
229#ifdef CONFIG_PPC_BOOK3S_64
230 /*
231 * RI=1 is set by interrupt_enter_prepare, so this thread flags access
232 * has to come afterward (it can cause SLB faults).
233 */
234 if (cpu_has_feature(CPU_FTR_CTRL) &&
235 !test_thread_local_flags(_TLF_RUNLATCH))
236 __ppc64_runlatch_on();
237#endif
238 irq_enter();
239}
240
241static inline void interrupt_async_exit_prepare(struct pt_regs *regs)
242{
243 /*
244 * Adjust at exit so the main handler sees the true NIA. This must
245 * come before irq_exit() because irq_exit can enable interrupts, and
246 * if another interrupt is taken before nap_adjust_return has run
247 * here, then that interrupt would return directly to idle nap return.
248 */
249 nap_adjust_return(regs);
250
251 irq_exit();
252 interrupt_exit_prepare(regs);
253}
254
255struct interrupt_nmi_state {
256#ifdef CONFIG_PPC64
257 u8 irq_soft_mask;
258 u8 irq_happened;
259 u8 ftrace_enabled;
260 u64 softe;
261#endif
262};
263
264static inline bool nmi_disables_ftrace(struct pt_regs *regs)
265{
266 /* Allow DEC and PMI to be traced when they are soft-NMI */
267 if (IS_ENABLED(CONFIG_PPC_BOOK3S_64)) {
268 if (TRAP(regs) == INTERRUPT_DECREMENTER)
269 return false;
270 if (TRAP(regs) == INTERRUPT_PERFMON)
271 return false;
272 }
273 if (IS_ENABLED(CONFIG_PPC_BOOK3E_64)) {
274 if (TRAP(regs) == INTERRUPT_PERFMON)
275 return false;
276 }
277
278 return true;
279}
280
281static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
282{
283#ifdef CONFIG_PPC64
284 state->irq_soft_mask = local_paca->irq_soft_mask;
285 state->irq_happened = local_paca->irq_happened;
286 state->softe = regs->softe;
287
288 /*
289 * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
290 * the right thing, and set IRQ_HARD_DIS. We do not want to reconcile
291 * because that goes through irq tracing which we don't want in NMI.
292 */
293 local_paca->irq_soft_mask = IRQS_ALL_DISABLED;
294 local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
295
296 if (!(regs->msr & MSR_EE) || is_implicit_soft_masked(regs)) {
297 /*
298 * Adjust regs->softe to be soft-masked if it had not been
299 * reconcied (e.g., interrupt entry with MSR[EE]=0 but softe
300 * not yet set disabled), or if it was in an implicit soft
301 * masked state. This makes arch_irq_disabled_regs(regs)
302 * behave as expected.
303 */
304 regs->softe = IRQS_ALL_DISABLED;
305 }
306
307 __hard_RI_enable();
308
309 /* Don't do any per-CPU operations until interrupt state is fixed */
310
311 if (nmi_disables_ftrace(regs)) {
312 state->ftrace_enabled = this_cpu_get_ftrace_enabled();
313 this_cpu_set_ftrace_enabled(0);
314 }
315#endif
316
317 /* If data relocations are enabled, it's safe to use nmi_enter() */
318 if (mfmsr() & MSR_DR) {
319 nmi_enter();
320 return;
321 }
322
323 /*
324 * But do not use nmi_enter() for pseries hash guest taking a real-mode
325 * NMI because not everything it touches is within the RMA limit.
326 */
327 if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
328 firmware_has_feature(FW_FEATURE_LPAR) &&
329 !radix_enabled())
330 return;
331
332 /*
333 * Likewise, don't use it if we have some form of instrumentation (like
334 * KASAN shadow) that is not safe to access in real mode (even on radix)
335 */
336 if (IS_ENABLED(CONFIG_KASAN))
337 return;
338
339 /* Otherwise, it should be safe to call it */
340 nmi_enter();
341}
342
343static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
344{
345 if (mfmsr() & MSR_DR) {
346 // nmi_exit if relocations are on
347 nmi_exit();
348 } else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
349 firmware_has_feature(FW_FEATURE_LPAR) &&
350 !radix_enabled()) {
351 // no nmi_exit for a pseries hash guest taking a real mode exception
352 } else if (IS_ENABLED(CONFIG_KASAN)) {
353 // no nmi_exit for KASAN in real mode
354 } else {
355 nmi_exit();
356 }
357
358 /*
359 * nmi does not call nap_adjust_return because nmi should not create
360 * new work to do (must use irq_work for that).
361 */
362
363#ifdef CONFIG_PPC64
364#ifdef CONFIG_PPC_BOOK3S
365 if (arch_irq_disabled_regs(regs)) {
366 unsigned long rst = search_kernel_restart_table(regs->nip);
367 if (rst)
368 regs_set_return_ip(regs, rst);
369 }
370#endif
371
372 if (nmi_disables_ftrace(regs))
373 this_cpu_set_ftrace_enabled(state->ftrace_enabled);
374
375 /* Check we didn't change the pending interrupt mask. */
376 WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened);
377 regs->softe = state->softe;
378 local_paca->irq_happened = state->irq_happened;
379 local_paca->irq_soft_mask = state->irq_soft_mask;
380#endif
381}
382
383/*
384 * Don't use noinstr here like x86, but rather add NOKPROBE_SYMBOL to each
385 * function definition. The reason for this is the noinstr section is placed
386 * after the main text section, i.e., very far away from the interrupt entry
387 * asm. That creates problems with fitting linker stubs when building large
388 * kernels.
389 */
390#define interrupt_handler __visible noinline notrace __no_kcsan __no_sanitize_address
391
392/**
393 * DECLARE_INTERRUPT_HANDLER_RAW - Declare raw interrupt handler function
394 * @func: Function name of the entry point
395 * @returns: Returns a value back to asm caller
396 */
397#define DECLARE_INTERRUPT_HANDLER_RAW(func) \
398 __visible long func(struct pt_regs *regs)
399
400/**
401 * DEFINE_INTERRUPT_HANDLER_RAW - Define raw interrupt handler function
402 * @func: Function name of the entry point
403 * @returns: Returns a value back to asm caller
404 *
405 * @func is called from ASM entry code.
406 *
407 * This is a plain function which does no tracing, reconciling, etc.
408 * The macro is written so it acts as function definition. Append the
409 * body with a pair of curly brackets.
410 *
411 * raw interrupt handlers must not enable or disable interrupts, or
412 * schedule, tracing and instrumentation (ftrace, lockdep, etc) would
413 * not be advisable either, although may be possible in a pinch, the
414 * trace will look odd at least.
415 *
416 * A raw handler may call one of the other interrupt handler functions
417 * to be converted into that interrupt context without these restrictions.
418 *
419 * On PPC64, _RAW handlers may return with fast_interrupt_return.
420 *
421 * Specific handlers may have additional restrictions.
422 */
423#define DEFINE_INTERRUPT_HANDLER_RAW(func) \
424static __always_inline __no_sanitize_address __no_kcsan long \
425____##func(struct pt_regs *regs); \
426 \
427interrupt_handler long func(struct pt_regs *regs) \
428{ \
429 long ret; \
430 \
431 __hard_RI_enable(); \
432 \
433 ret = ____##func (regs); \
434 \
435 return ret; \
436} \
437NOKPROBE_SYMBOL(func); \
438 \
439static __always_inline __no_sanitize_address __no_kcsan long \
440____##func(struct pt_regs *regs)
441
442/**
443 * DECLARE_INTERRUPT_HANDLER - Declare synchronous interrupt handler function
444 * @func: Function name of the entry point
445 */
446#define DECLARE_INTERRUPT_HANDLER(func) \
447 __visible void func(struct pt_regs *regs)
448
449/**
450 * DEFINE_INTERRUPT_HANDLER - Define synchronous interrupt handler function
451 * @func: Function name of the entry point
452 *
453 * @func is called from ASM entry code.
454 *
455 * The macro is written so it acts as function definition. Append the
456 * body with a pair of curly brackets.
457 */
458#define DEFINE_INTERRUPT_HANDLER(func) \
459static __always_inline void ____##func(struct pt_regs *regs); \
460 \
461interrupt_handler void func(struct pt_regs *regs) \
462{ \
463 interrupt_enter_prepare(regs); \
464 \
465 ____##func (regs); \
466 \
467 interrupt_exit_prepare(regs); \
468} \
469NOKPROBE_SYMBOL(func); \
470 \
471static __always_inline void ____##func(struct pt_regs *regs)
472
473/**
474 * DECLARE_INTERRUPT_HANDLER_RET - Declare synchronous interrupt handler function
475 * @func: Function name of the entry point
476 * @returns: Returns a value back to asm caller
477 */
478#define DECLARE_INTERRUPT_HANDLER_RET(func) \
479 __visible long func(struct pt_regs *regs)
480
481/**
482 * DEFINE_INTERRUPT_HANDLER_RET - Define synchronous interrupt handler function
483 * @func: Function name of the entry point
484 * @returns: Returns a value back to asm caller
485 *
486 * @func is called from ASM entry code.
487 *
488 * The macro is written so it acts as function definition. Append the
489 * body with a pair of curly brackets.
490 */
491#define DEFINE_INTERRUPT_HANDLER_RET(func) \
492static __always_inline long ____##func(struct pt_regs *regs); \
493 \
494interrupt_handler long func(struct pt_regs *regs) \
495{ \
496 long ret; \
497 \
498 interrupt_enter_prepare(regs); \
499 \
500 ret = ____##func (regs); \
501 \
502 interrupt_exit_prepare(regs); \
503 \
504 return ret; \
505} \
506NOKPROBE_SYMBOL(func); \
507 \
508static __always_inline long ____##func(struct pt_regs *regs)
509
510/**
511 * DECLARE_INTERRUPT_HANDLER_ASYNC - Declare asynchronous interrupt handler function
512 * @func: Function name of the entry point
513 */
514#define DECLARE_INTERRUPT_HANDLER_ASYNC(func) \
515 __visible void func(struct pt_regs *regs)
516
517/**
518 * DEFINE_INTERRUPT_HANDLER_ASYNC - Define asynchronous interrupt handler function
519 * @func: Function name of the entry point
520 *
521 * @func is called from ASM entry code.
522 *
523 * The macro is written so it acts as function definition. Append the
524 * body with a pair of curly brackets.
525 */
526#define DEFINE_INTERRUPT_HANDLER_ASYNC(func) \
527static __always_inline void ____##func(struct pt_regs *regs); \
528 \
529interrupt_handler void func(struct pt_regs *regs) \
530{ \
531 interrupt_async_enter_prepare(regs); \
532 \
533 ____##func (regs); \
534 \
535 interrupt_async_exit_prepare(regs); \
536} \
537NOKPROBE_SYMBOL(func); \
538 \
539static __always_inline void ____##func(struct pt_regs *regs)
540
541/**
542 * DECLARE_INTERRUPT_HANDLER_NMI - Declare NMI interrupt handler function
543 * @func: Function name of the entry point
544 * @returns: Returns a value back to asm caller
545 */
546#define DECLARE_INTERRUPT_HANDLER_NMI(func) \
547 __visible long func(struct pt_regs *regs)
548
549/**
550 * DEFINE_INTERRUPT_HANDLER_NMI - Define NMI interrupt handler function
551 * @func: Function name of the entry point
552 * @returns: Returns a value back to asm caller
553 *
554 * @func is called from ASM entry code.
555 *
556 * The macro is written so it acts as function definition. Append the
557 * body with a pair of curly brackets.
558 */
559#define DEFINE_INTERRUPT_HANDLER_NMI(func) \
560static __always_inline __no_sanitize_address __no_kcsan long \
561____##func(struct pt_regs *regs); \
562 \
563interrupt_handler long func(struct pt_regs *regs) \
564{ \
565 struct interrupt_nmi_state state; \
566 long ret; \
567 \
568 interrupt_nmi_enter_prepare(regs, &state); \
569 \
570 ret = ____##func (regs); \
571 \
572 interrupt_nmi_exit_prepare(regs, &state); \
573 \
574 return ret; \
575} \
576NOKPROBE_SYMBOL(func); \
577 \
578static __always_inline __no_sanitize_address __no_kcsan long \
579____##func(struct pt_regs *regs)
580
581
582/* Interrupt handlers */
583/* kernel/traps.c */
584DECLARE_INTERRUPT_HANDLER_NMI(system_reset_exception);
585#ifdef CONFIG_PPC_BOOK3S_64
586DECLARE_INTERRUPT_HANDLER_RAW(machine_check_early_boot);
587DECLARE_INTERRUPT_HANDLER_ASYNC(machine_check_exception_async);
588#endif
589DECLARE_INTERRUPT_HANDLER_NMI(machine_check_exception);
590DECLARE_INTERRUPT_HANDLER(SMIException);
591DECLARE_INTERRUPT_HANDLER(handle_hmi_exception);
592DECLARE_INTERRUPT_HANDLER(unknown_exception);
593DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
594DECLARE_INTERRUPT_HANDLER_NMI(unknown_nmi_exception);
595DECLARE_INTERRUPT_HANDLER(instruction_breakpoint_exception);
596DECLARE_INTERRUPT_HANDLER(RunModeException);
597DECLARE_INTERRUPT_HANDLER(single_step_exception);
598DECLARE_INTERRUPT_HANDLER(program_check_exception);
599DECLARE_INTERRUPT_HANDLER(emulation_assist_interrupt);
600DECLARE_INTERRUPT_HANDLER(alignment_exception);
601DECLARE_INTERRUPT_HANDLER(StackOverflow);
602DECLARE_INTERRUPT_HANDLER(stack_overflow_exception);
603DECLARE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception);
604DECLARE_INTERRUPT_HANDLER(altivec_unavailable_exception);
605DECLARE_INTERRUPT_HANDLER(vsx_unavailable_exception);
606DECLARE_INTERRUPT_HANDLER(facility_unavailable_exception);
607DECLARE_INTERRUPT_HANDLER(fp_unavailable_tm);
608DECLARE_INTERRUPT_HANDLER(altivec_unavailable_tm);
609DECLARE_INTERRUPT_HANDLER(vsx_unavailable_tm);
610DECLARE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi);
611DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async);
612DECLARE_INTERRUPT_HANDLER_RAW(performance_monitor_exception);
613DECLARE_INTERRUPT_HANDLER(DebugException);
614DECLARE_INTERRUPT_HANDLER(altivec_assist_exception);
615DECLARE_INTERRUPT_HANDLER(CacheLockingException);
616DECLARE_INTERRUPT_HANDLER(SPEFloatingPointException);
617DECLARE_INTERRUPT_HANDLER(SPEFloatingPointRoundException);
618DECLARE_INTERRUPT_HANDLER_NMI(WatchdogException);
619DECLARE_INTERRUPT_HANDLER(kernel_bad_stack);
620
621/* slb.c */
622DECLARE_INTERRUPT_HANDLER_RAW(do_slb_fault);
623DECLARE_INTERRUPT_HANDLER(do_bad_segment_interrupt);
624
625/* hash_utils.c */
626DECLARE_INTERRUPT_HANDLER(do_hash_fault);
627
628/* fault.c */
629DECLARE_INTERRUPT_HANDLER(do_page_fault);
630DECLARE_INTERRUPT_HANDLER(do_bad_page_fault_segv);
631
632/* process.c */
633DECLARE_INTERRUPT_HANDLER(do_break);
634
635/* time.c */
636DECLARE_INTERRUPT_HANDLER_ASYNC(timer_interrupt);
637
638/* mce.c */
639DECLARE_INTERRUPT_HANDLER_NMI(machine_check_early);
640DECLARE_INTERRUPT_HANDLER_NMI(hmi_exception_realmode);
641
642DECLARE_INTERRUPT_HANDLER_ASYNC(TAUException);
643
644/* irq.c */
645DECLARE_INTERRUPT_HANDLER_ASYNC(do_IRQ);
646
647void __noreturn unrecoverable_exception(struct pt_regs *regs);
648
649void replay_system_reset(void);
650void replay_soft_interrupts(void);
651
652static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
653{
654 if (!arch_irq_disabled_regs(regs))
655 local_irq_enable();
656}
657
658long system_call_exception(struct pt_regs *regs, unsigned long r0);
659notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv);
660notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs);
661notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs);
662#ifdef CONFIG_PPC64
663unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs);
664unsigned long interrupt_exit_user_restart(struct pt_regs *regs);
665unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs);
666#endif
667
668#endif /* __ASSEMBLY__ */
669
670#endif /* _ASM_POWERPC_INTERRUPT_H */