aboutsummaryrefslogtreecommitdiff
path: root/sys/sys/systm.h
blob: 5de12e5bc1e5641d4caa2ad1a5158db58368886b (plain) (blame)
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
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1982, 1988, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)systm.h	8.7 (Berkeley) 3/29/95
 * $FreeBSD$
 */

#ifndef _SYS_SYSTM_H_
#define	_SYS_SYSTM_H_

#include <sys/cdefs.h>
#include <machine/atomic.h>
#include <machine/cpufunc.h>
#include <sys/callout.h>
#include <sys/queue.h>
#include <sys/stdint.h>		/* for people using printf mainly */

__NULLABILITY_PRAGMA_PUSH

#ifdef _KERNEL
extern int cold;		/* nonzero if we are doing a cold boot */
extern int suspend_blocked;	/* block suspend due to pending shutdown */
extern int rebooting;		/* kern_reboot() has been called. */
extern const char *panicstr;	/* panic message */
extern bool panicked;
#define	KERNEL_PANICKED()	__predict_false(panicked)
extern char version[];		/* system version */
extern char compiler_version[];	/* compiler version */
extern char copyright[];	/* system copyright */
extern int kstack_pages;	/* number of kernel stack pages */

extern u_long pagesizes[];	/* supported page sizes */
extern long physmem;		/* physical memory */
extern long realmem;		/* 'real' memory */

extern char *rootdevnames[2];	/* names of possible root devices */

extern int boothowto;		/* reboot flags, from console subsystem */
extern int bootverbose;		/* nonzero to print verbose messages */

extern int maxusers;		/* system tune hint */
extern int ngroups_max;		/* max # of supplemental groups */
extern int vm_guest;		/* Running as virtual machine guest? */

extern u_long maxphys;		/* max raw I/O transfer size */

/*
 * Detected virtual machine guest types. The intention is to expand
 * and/or add to the VM_GUEST_VM type if specific VM functionality is
 * ever implemented (e.g. vendor-specific paravirtualization features).
 * Keep in sync with vm_guest_sysctl_names[].
 */
enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV,
		VM_GUEST_VMWARE, VM_GUEST_KVM, VM_GUEST_BHYVE, VM_GUEST_VBOX,
		VM_GUEST_PARALLELS, VM_LAST };

#ifdef	INVARIANTS		/* The option is always available */
#define	VNASSERT(exp, vp, msg) do {					\
	if (__predict_false(!(exp))) {					\
		vn_printf(vp, "VNASSERT failed: %s not true at %s:%d (%s)\n",\
		   #exp, __FILE__, __LINE__, __func__);	 		\
		kassert_panic msg;					\
	}								\
} while (0)
#define	VNPASS(exp, vp)	do {						\
	const char *_exp = #exp;					\
	VNASSERT(exp, vp, ("condition %s not met at %s:%d (%s)",	\
	    _exp, __FILE__, __LINE__, __func__));			\
} while (0)
#define	__assert_unreachable() \
	panic("executing segment marked as unreachable at %s:%d (%s)\n", \
	    __FILE__, __LINE__, __func__)
#else
#define	VNASSERT(exp, vp, msg) do { \
} while (0)
#define	VNPASS(exp, vp) do { \
} while (0)
#define	__assert_unreachable()	__unreachable()
#endif

#ifndef CTASSERT	/* Allow lint to override */
#define	CTASSERT(x)	_Static_assert(x, "compile-time assertion failed")
#endif
#endif /* KERNEL */

/*
 * These functions need to be declared before the KASSERT macro is invoked in
 * !KASSERT_PANIC_OPTIONAL builds, so their declarations are sort of out of
 * place compared to other function definitions in this header.  On the other
 * hand, this header is a bit disorganized anyway.
 */
void	panic(const char *, ...) __dead2 __printflike(1, 2);
void	vpanic(const char *, __va_list) __dead2 __printflike(1, 0);


#if defined(_STANDALONE)
struct ucred;
/*
 * Until we have more experience with KASSERTS that are called
 * from the boot loader, they are off. The bootloader does this
 * a little differently than the kernel (we just call printf atm).
 * we avoid most of the common functions in the boot loader, so
 * declare printf() here too.
 */
int	printf(const char *, ...) __printflike(1, 2);
#  define kassert_panic printf
#else /* !_STANDALONE */
#  if defined(WITNESS) || defined(INVARIANT_SUPPORT)
#    ifdef KASSERT_PANIC_OPTIONAL
void	kassert_panic(const char *fmt, ...)  __printflike(1, 2);
#    else
#      define kassert_panic	panic
#    endif /* KASSERT_PANIC_OPTIONAL */
#  endif /* defined(WITNESS) || defined(INVARIANT_SUPPORT) */
#endif /* _STANDALONE */

#if defined(INVARIANTS) || defined(_STANDALONE)
#define	KASSERT(exp,msg) do {						\
	if (__predict_false(!(exp)))					\
		kassert_panic msg;					\
} while (0)
#else /* !INVARIANTS && !_STANDALONE */
#define	KASSERT(exp,msg) do { \
} while (0)
#endif /* INVARIANTS || _STANDALONE */

/*
 * Helpful macros for quickly coming up with assertions with informative
 * panic messages.
 */
#define MPASS(ex)		MPASS4(ex, #ex, __FILE__, __LINE__)
#define MPASS2(ex, what)	MPASS4(ex, what, __FILE__, __LINE__)
#define MPASS3(ex, file, line)	MPASS4(ex, #ex, file, line)
#define MPASS4(ex, what, file, line)					\
	KASSERT((ex), ("Assertion %s failed at %s:%d", what, file, line))

/*
 * Align variables.
 */
#define	__read_mostly		__section(".data.read_mostly")
#define	__read_frequently	__section(".data.read_frequently")
#define	__exclusive_cache_line	__aligned(CACHE_LINE_SIZE) \
				    __section(".data.exclusive_cache_line")
#ifdef _KERNEL
#include <sys/param.h>		/* MAXCPU */
#include <sys/pcpu.h>		/* curthread */
#include <sys/kpilite.h>

/*
 * Assert that a pointer can be loaded from memory atomically.
 *
 * This assertion enforces stronger alignment than necessary.  For example,
 * on some architectures, atomicity for unaligned loads will depend on
 * whether or not the load spans multiple cache lines.
 */
#define	ASSERT_ATOMIC_LOAD_PTR(var, msg)				\
	KASSERT(sizeof(var) == sizeof(void *) &&			\
	    ((uintptr_t)&(var) & (sizeof(void *) - 1)) == 0, msg)

/*
 * Assert that a thread is in critical(9) section.
 */
#define	CRITICAL_ASSERT(td)						\
	KASSERT((td)->td_critnest >= 1, ("Not in critical section"));

/*
 * If we have already panic'd and this is the thread that called
 * panic(), then don't block on any mutexes but silently succeed.
 * Otherwise, the kernel will deadlock since the scheduler isn't
 * going to run the thread that holds any lock we need.
 */
#define	SCHEDULER_STOPPED_TD(td)  ({					\
	MPASS((td) == curthread);					\
	__predict_false((td)->td_stopsched);				\
})
#define	SCHEDULER_STOPPED() SCHEDULER_STOPPED_TD(curthread)

extern int osreldate;

extern const void *zero_region;	/* address space maps to a zeroed page	*/

extern int unmapped_buf_allowed;

#ifdef __LP64__
#define	IOSIZE_MAX		iosize_max()
#define	DEVFS_IOSIZE_MAX	devfs_iosize_max()
#else
#define	IOSIZE_MAX		SSIZE_MAX
#define	DEVFS_IOSIZE_MAX	SSIZE_MAX
#endif

/*
 * General function declarations.
 */

struct inpcb;
struct lock_object;
struct malloc_type;
struct mtx;
struct proc;
struct socket;
struct thread;
struct tty;
struct ucred;
struct uio;
struct _jmp_buf;
struct trapframe;
struct eventtimer;

int	setjmp(struct _jmp_buf *) __returns_twice;
void	longjmp(struct _jmp_buf *, int) __dead2;
int	dumpstatus(vm_offset_t addr, off_t count);
int	nullop(void);
int	eopnotsupp(void);
int	ureadc(int, struct uio *);
void	hashdestroy(void *, struct malloc_type *, u_long);
void	*hashinit(int count, struct malloc_type *type, u_long *hashmask);
void	*hashinit_flags(int count, struct malloc_type *type,
    u_long *hashmask, int flags);
#define	HASH_NOWAIT	0x00000001
#define	HASH_WAITOK	0x00000002

void	*phashinit(int count, struct malloc_type *type, u_long *nentries);
void	*phashinit_flags(int count, struct malloc_type *type, u_long *nentries,
    int flags);
void	g_waitidle(void);

void	cpu_flush_dcache(void *, size_t);
void	cpu_rootconf(void);
void	critical_enter_KBI(void);
void	critical_exit_KBI(void);
void	critical_exit_preempt(void);
void	init_param1(void);
void	init_param2(long physpages);
void	init_static_kenv(char *, size_t);
void	tablefull(const char *);

/*
 * Allocate per-thread "current" state in the linuxkpi
 */
extern int (*lkpi_alloc_current)(struct thread *, int);
int linux_alloc_current_noop(struct thread *, int);

#if defined(KLD_MODULE) || defined(KTR_CRITICAL) || !defined(_KERNEL) || defined(GENOFFSET)
#define critical_enter() critical_enter_KBI()
#define critical_exit() critical_exit_KBI()
#else
static __inline void
critical_enter(void)
{
	struct thread_lite *td;

	td = (struct thread_lite *)curthread;
	td->td_critnest++;
	__compiler_membar();
}

static __inline void
critical_exit(void)
{
	struct thread_lite *td;

	td = (struct thread_lite *)curthread;
	KASSERT(td->td_critnest != 0,
	    ("critical_exit: td_critnest == 0"));
	__compiler_membar();
	td->td_critnest--;
	__compiler_membar();
	if (__predict_false(td->td_owepreempt))
		critical_exit_preempt();

}
#endif

#ifdef  EARLY_PRINTF
typedef void early_putc_t(int ch);
extern early_putc_t *early_putc;
#endif
int	kvprintf(char const *, void (*)(int, void*), void *, int,
	    __va_list) __printflike(1, 0);
void	log(int, const char *, ...) __printflike(2, 3);
void	log_console(struct uio *);
void	vlog(int, const char *, __va_list) __printflike(2, 0);
int	asprintf(char **ret, struct malloc_type *mtp, const char *format, 
	    ...) __printflike(3, 4);
int	printf(const char *, ...) __printflike(1, 2);
int	snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
int	sprintf(char *buf, const char *, ...) __printflike(2, 3);
int	uprintf(const char *, ...) __printflike(1, 2);
int	vprintf(const char *, __va_list) __printflike(1, 0);
int	vasprintf(char **ret, struct malloc_type *mtp, const char *format,
	    __va_list ap) __printflike(3, 0);
int	vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0);
int	vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0);
int	vsprintf(char *buf, const char *, __va_list) __printflike(2, 0);
int	sscanf(const char *, char const * _Nonnull, ...) __scanflike(2, 3);
int	vsscanf(const char * _Nonnull, char const * _Nonnull, __va_list)  __scanflike(2, 0);
long	strtol(const char *, char **, int);
u_long	strtoul(const char *, char **, int);
quad_t	strtoq(const char *, char **, int);
u_quad_t strtouq(const char *, char **, int);
void	tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4);
void	vtprintf(struct proc *, int, const char *, __va_list) __printflike(3, 0);
void	hexdump(const void *ptr, int length, const char *hdr, int flags);
#define	HD_COLUMN_MASK	0xff
#define	HD_DELIM_MASK	0xff00
#define	HD_OMIT_COUNT	(1 << 16)
#define	HD_OMIT_HEX	(1 << 17)
#define	HD_OMIT_CHARS	(1 << 18)

#define ovbcopy(f, t, l) bcopy((f), (t), (l))
void	bcopy(const void * _Nonnull from, void * _Nonnull to, size_t len);
void	bzero(void * _Nonnull buf, size_t len);
void	explicit_bzero(void * _Nonnull, size_t);
int	bcmp(const void *b1, const void *b2, size_t len);

void	*memset(void * _Nonnull buf, int c, size_t len);
void	*memcpy(void * _Nonnull to, const void * _Nonnull from, size_t len);
void	*memmove(void * _Nonnull dest, const void * _Nonnull src, size_t n);
int	memcmp(const void *b1, const void *b2, size_t len);

#ifdef KCSAN
void	*kcsan_memset(void *, int, size_t);
void	*kcsan_memcpy(void *, const void *, size_t);
void	*kcsan_memmove(void *, const void *, size_t);
int	kcsan_memcmp(const void *, const void *, size_t);
#define bcopy(from, to, len) kcsan_memmove((to), (from), (len))
#define bzero(buf, len) kcsan_memset((buf), 0, (len))
#define bcmp(b1, b2, len) kcsan_memcmp((b1), (b2), (len))
#define memset(buf, c, len) kcsan_memset((buf), (c), (len))
#define memcpy(to, from, len) kcsan_memcpy((to), (from), (len))
#define memmove(dest, src, n) kcsan_memmove((dest), (src), (n))
#define memcmp(b1, b2, len) kcsan_memcmp((b1), (b2), (len))
#else
#define bcopy(from, to, len) __builtin_memmove((to), (from), (len))
#define bzero(buf, len) __builtin_memset((buf), 0, (len))
#define bcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
#define memset(buf, c, len) __builtin_memset((buf), (c), (len))
#define memcpy(to, from, len) __builtin_memcpy((to), (from), (len))
#define memmove(dest, src, n) __builtin_memmove((dest), (src), (n))
#define memcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
#endif

void	*memset_early(void * _Nonnull buf, int c, size_t len);
#define bzero_early(buf, len) memset_early((buf), 0, (len))
void	*memcpy_early(void * _Nonnull to, const void * _Nonnull from, size_t len);
void	*memmove_early(void * _Nonnull dest, const void * _Nonnull src, size_t n);
#define bcopy_early(from, to, len) memmove_early((to), (from), (len))

#define	copystr(src, dst, len, outlen)	({			\
	size_t __r, __len, *__outlen;				\
								\
	__len = (len);						\
	__outlen = (outlen);					\
	__r = strlcpy((dst), (src), __len);			\
	if (__outlen != NULL)					\
		*__outlen = ((__r >= __len) ? __len : __r + 1);	\
	((__r >= __len) ? ENAMETOOLONG : 0);			\
})

int	copyinstr(const void * __restrict udaddr,
	    void * _Nonnull __restrict kaddr, size_t len,
	    size_t * __restrict lencopied);
int	copyin(const void * __restrict udaddr,
	    void * _Nonnull __restrict kaddr, size_t len);
int	copyin_nofault(const void * __restrict udaddr,
	    void * _Nonnull __restrict kaddr, size_t len);
int	copyout(const void * _Nonnull __restrict kaddr,
	    void * __restrict udaddr, size_t len);
int	copyout_nofault(const void * _Nonnull __restrict kaddr,
	    void * __restrict udaddr, size_t len);

#ifdef KCSAN
int	kcsan_copyin(const void *, void *, size_t);
int	kcsan_copyinstr(const void *, void *, size_t, size_t *);
int	kcsan_copyout(const void *, void *, size_t);
#define	copyin(u, k, l) kcsan_copyin((u), (k), (l))
#define	copyinstr(u, k, l, lc) kcsan_copyinstr((u), (k), (l), (lc))
#define	copyout(k, u, l) kcsan_copyout((k), (u), (l))
#endif

int	fubyte(volatile const void *base);
long	fuword(volatile const void *base);
int	fuword16(volatile const void *base);
int32_t	fuword32(volatile const void *base);
int64_t	fuword64(volatile const void *base);
int	fueword(volatile const void *base, long *val);
int	fueword32(volatile const void *base, int32_t *val);
int	fueword64(volatile const void *base, int64_t *val);
int	subyte(volatile void *base, int byte);
int	suword(volatile void *base, long word);
int	suword16(volatile void *base, int word);
int	suword32(volatile void *base, int32_t word);
int	suword64(volatile void *base, int64_t word);
uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval);
u_long	casuword(volatile u_long *p, u_long oldval, u_long newval);
int	casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp,
	    uint32_t newval);
int	casueword(volatile u_long *p, u_long oldval, u_long *oldvalp,
	    u_long newval);

void	realitexpire(void *);

int	sysbeep(int hertz, int period);

void	hardclock(int cnt, int usermode);
void	hardclock_sync(int cpu);
void	softclock(void *);
void	statclock(int cnt, int usermode);
void	profclock(int cnt, int usermode, uintfptr_t pc);

int	hardclockintr(void);

void	startprofclock(struct proc *);
void	stopprofclock(struct proc *);
void	cpu_startprofclock(void);
void	cpu_stopprofclock(void);
void	suspendclock(void);
void	resumeclock(void);
sbintime_t 	cpu_idleclock(void);
void	cpu_activeclock(void);
void	cpu_new_callout(int cpu, sbintime_t bt, sbintime_t bt_opt);
void	cpu_et_frequency(struct eventtimer *et, uint64_t newfreq);
extern int	cpu_disable_c2_sleep;
extern int	cpu_disable_c3_sleep;

char	*kern_getenv(const char *name);
void	freeenv(char *env);
int	getenv_int(const char *name, int *data);
int	getenv_uint(const char *name, unsigned int *data);
int	getenv_long(const char *name, long *data);
int	getenv_ulong(const char *name, unsigned long *data);
int	getenv_string(const char *name, char *data, int size);
int	getenv_int64(const char *name, int64_t *data);
int	getenv_uint64(const char *name, uint64_t *data);
int	getenv_quad(const char *name, quad_t *data);
int	getenv_bool(const char *name, bool *data);
bool	getenv_is_true(const char *name);
bool	getenv_is_false(const char *name);
int	kern_setenv(const char *name, const char *value);
int	kern_unsetenv(const char *name);
int	testenv(const char *name);

int	getenv_array(const char *name, void *data, int size, int *psize,
    int type_size, bool allow_signed);
#define	GETENV_UNSIGNED	false	/* negative numbers not allowed */
#define	GETENV_SIGNED	true	/* negative numbers allowed */

typedef uint64_t (cpu_tick_f)(void);
void set_cputicker(cpu_tick_f *func, uint64_t freq, unsigned var);
extern cpu_tick_f *cpu_ticks;
uint64_t cpu_tickrate(void);
uint64_t cputick2usec(uint64_t tick);

#include <sys/libkern.h>

/* Initialize the world */
void	consinit(void);
void	cpu_initclocks(void);
void	cpu_initclocks_bsp(void);
void	cpu_initclocks_ap(void);
void	usrinfoinit(void);

/* Finalize the world */
void	kern_reboot(int) __dead2;
void	shutdown_nice(int);

/* Stubs for obsolete functions that used to be for interrupt management */
static __inline intrmask_t	splhigh(void)		{ return 0; }
static __inline intrmask_t	splimp(void)		{ return 0; }
static __inline intrmask_t	splnet(void)		{ return 0; }
static __inline intrmask_t	spltty(void)		{ return 0; }
static __inline void		splx(intrmask_t ipl __unused)	{ return; }

/*
 * Common `proc' functions are declared here so that proc.h can be included
 * less often.
 */
int	_sleep(const void * _Nonnull chan, struct lock_object *lock, int pri,
	   const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
#define	msleep(chan, mtx, pri, wmesg, timo)				\
	_sleep((chan), &(mtx)->lock_object, (pri), (wmesg),		\
	    tick_sbt * (timo), 0, C_HARDCLOCK)
#define	msleep_sbt(chan, mtx, pri, wmesg, bt, pr, flags)		\
	_sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (bt), (pr),	\
	    (flags))
int	msleep_spin_sbt(const void * _Nonnull chan, struct mtx *mtx,
	    const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
#define	msleep_spin(chan, mtx, wmesg, timo)				\
	msleep_spin_sbt((chan), (mtx), (wmesg), tick_sbt * (timo),	\
	    0, C_HARDCLOCK)
int	pause_sbt(const char *wmesg, sbintime_t sbt, sbintime_t pr,
	    int flags);
#define	pause(wmesg, timo)						\
	pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK)
#define	pause_sig(wmesg, timo)						\
	pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK | C_CATCH)
#define	tsleep(chan, pri, wmesg, timo)					\
	_sleep((chan), NULL, (pri), (wmesg), tick_sbt * (timo),		\
	    0, C_HARDCLOCK)
#define	tsleep_sbt(chan, pri, wmesg, bt, pr, flags)			\
	_sleep((chan), NULL, (pri), (wmesg), (bt), (pr), (flags))
void	wakeup(const void *chan);
void	wakeup_one(const void *chan);
void	wakeup_any(const void *chan);

/*
 * Common `struct cdev *' stuff are declared here to avoid #include poisoning
 */

struct cdev;
dev_t dev2udev(struct cdev *x);
const char *devtoname(struct cdev *cdev);

#ifdef __LP64__
size_t	devfs_iosize_max(void);
size_t	iosize_max(void);
#endif

int poll_no_poll(int events);

/* XXX: Should be void nanodelay(u_int nsec); */
void	DELAY(int usec);

/* Root mount holdback API */
struct root_hold_token {
	int				flags;
	const char			*who;
	TAILQ_ENTRY(root_hold_token)	list;
};

struct root_hold_token *root_mount_hold(const char *identifier);
void root_mount_hold_token(const char *identifier, struct root_hold_token *h);
void root_mount_rel(struct root_hold_token *h);
int root_mounted(void);

/*
 * Unit number allocation API. (kern/subr_unit.c)
 */
struct unrhdr;
struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex);
void init_unrhdr(struct unrhdr *uh, int low, int high, struct mtx *mutex);
void delete_unrhdr(struct unrhdr *uh);
void clear_unrhdr(struct unrhdr *uh);
void clean_unrhdr(struct unrhdr *uh);
void clean_unrhdrl(struct unrhdr *uh);
int alloc_unr(struct unrhdr *uh);
int alloc_unr_specific(struct unrhdr *uh, u_int item);
int alloc_unrl(struct unrhdr *uh);
void free_unr(struct unrhdr *uh, u_int item);

#ifndef __LP64__
#define UNR64_LOCKED
#endif

struct unrhdr64 {
        uint64_t	counter;
};

static __inline void
new_unrhdr64(struct unrhdr64 *unr64, uint64_t low)
{

	unr64->counter = low;
}

#ifdef UNR64_LOCKED
uint64_t alloc_unr64(struct unrhdr64 *);
#else
static __inline uint64_t
alloc_unr64(struct unrhdr64 *unr64)
{

	return (atomic_fetchadd_64(&unr64->counter, 1));
}
#endif

void	intr_prof_stack_use(struct thread *td, struct trapframe *frame);

void counted_warning(unsigned *counter, const char *msg);

/*
 * APIs to manage deprecation and obsolescence.
 */
struct device;
void _gone_in(int major, const char *msg);
void _gone_in_dev(struct device *dev, int major, const char *msg);
#ifdef NO_OBSOLETE_CODE
#define __gone_ok(m, msg)					 \
	_Static_assert(m < P_OSREL_MAJOR(__FreeBSD_version)),	 \
	    "Obsolete code: " msg);
#else
#define	__gone_ok(m, msg)
#endif
#define gone_in(major, msg)		__gone_ok(major, msg) _gone_in(major, msg)
#define gone_in_dev(dev, major, msg)	__gone_ok(major, msg) _gone_in_dev(dev, major, msg)
#endif /* _KERNEL */

__NULLABILITY_PRAGMA_POP

#endif /* !_SYS_SYSTM_H_ */