1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1982, 1988, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 #ifndef _SYS_SYSTM_H_
38 #define _SYS_SYSTM_H_
39
40 #include <sys/types.h>
41 #include <sys/callout.h>
42 #include <sys/kassert.h>
43 #include <sys/queue.h>
44 #include <sys/stdint.h> /* for people using printf mainly */
45 #include <machine/atomic.h>
46 #include <machine/cpufunc.h>
47
48 __NULLABILITY_PRAGMA_PUSH
49
50 #ifdef _KERNEL
51 extern int cold; /* nonzero if we are doing a cold boot */
52 extern int suspend_blocked; /* block suspend due to pending shutdown */
53 extern int rebooting; /* kern_reboot() has been called. */
54 extern const char version[]; /* system version */
55 extern const char compiler_version[]; /* compiler version */
56 extern const char copyright[]; /* system copyright */
57 extern int kstack_pages; /* number of kernel stack pages */
58
59 extern u_long pagesizes[]; /* supported page sizes */
60 extern long physmem; /* physical memory */
61 extern long realmem; /* 'real' memory */
62
63 extern char *rootdevnames[2]; /* names of possible root devices */
64
65 extern int boothowto; /* reboot flags, from console subsystem */
66 extern int bootverbose; /* nonzero to print verbose messages */
67
68 extern int maxusers; /* system tune hint */
69 extern int ngroups_max; /* max # of supplemental groups */
70 extern int vm_guest; /* Running as virtual machine guest? */
71
72 extern u_long maxphys; /* max raw I/O transfer size */
73
74 /*
75 * Detected virtual machine guest types. The intention is to expand
76 * and/or add to the VM_GUEST_VM type if specific VM functionality is
77 * ever implemented (e.g. vendor-specific paravirtualization features).
78 * Keep in sync with vm_guest_sysctl_names[].
79 */
80 enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV,
81 VM_GUEST_VMWARE, VM_GUEST_KVM, VM_GUEST_BHYVE, VM_GUEST_VBOX,
82 VM_GUEST_PARALLELS, VM_GUEST_NVMM, VM_GUEST_LAST };
83
84 #endif /* KERNEL */
85
86 /*
87 * Align variables.
88 */
89 #define __read_mostly __section(".data.read_mostly")
90 #define __read_frequently __section(".data.read_frequently")
91 #define __exclusive_cache_line __aligned(CACHE_LINE_SIZE) \
92 __section(".data.exclusive_cache_line")
93 #if defined(_STANDALONE)
94 struct ucred;
95 #endif
96
97 #ifdef _KERNEL
98 #include <sys/param.h> /* MAXCPU */
99 #include <sys/pcpu.h> /* curthread */
100 #include <sys/kpilite.h>
101
102 extern bool scheduler_stopped;
103
104 /*
105 * If we have already panic'd and this is the thread that called
106 * panic(), then don't block on any mutexes but silently succeed.
107 * Otherwise, the kernel will deadlock since the scheduler isn't
108 * going to run the thread that holds any lock we need.
109 */
110 #define SCHEDULER_STOPPED() __predict_false(scheduler_stopped)
111
112 extern const int osreldate;
113
114 extern const void *zero_region; /* address space maps to a zeroed page */
115
116 extern int unmapped_buf_allowed;
117
118 #ifdef __LP64__
119 #define IOSIZE_MAX iosize_max()
120 #define DEVFS_IOSIZE_MAX devfs_iosize_max()
121 #else
122 #define IOSIZE_MAX SSIZE_MAX
123 #define DEVFS_IOSIZE_MAX SSIZE_MAX
124 #endif
125
126 /*
127 * General function declarations.
128 */
129
130 struct lock_object;
131 struct malloc_type;
132 struct mtx;
133 struct proc;
134 struct thread;
135 struct tty;
136 struct ucred;
137 struct uio;
138 struct _jmp_buf;
139 struct trapframe;
140 struct eventtimer;
141
142 int setjmp(struct _jmp_buf *) __returns_twice;
143 void longjmp(struct _jmp_buf *, int) __dead2;
144 int dumpstatus(vm_offset_t addr, off_t count);
145 int nullop(void);
146 int eopnotsupp(void);
147 int ureadc(int, struct uio *);
148 void hashdestroy(void *, struct malloc_type *, u_long);
149 void *hashinit(int count, struct malloc_type *type, u_long *hashmask);
150 void *hashinit_flags(int count, struct malloc_type *type,
151 u_long *hashmask, int flags);
152 #define HASH_NOWAIT 0x00000001
153 #define HASH_WAITOK 0x00000002
154
155 void *phashinit(int count, struct malloc_type *type, u_long *nentries);
156 void *phashinit_flags(int count, struct malloc_type *type, u_long *nentries,
157 int flags);
158
159 void cpu_flush_dcache(void *, size_t);
160 void cpu_rootconf(void);
161 void critical_enter_KBI(void);
162 void critical_exit_KBI(void);
163 void critical_exit_preempt(void);
164 void init_param1(void);
165 void init_param2(long physpages);
166 void init_static_kenv(char *, size_t);
167 void tablefull(const char *);
168
169 /*
170 * Allocate per-thread "current" state in the linuxkpi
171 */
172 extern int (*lkpi_alloc_current)(struct thread *, int);
173 int linux_alloc_current_noop(struct thread *, int);
174
175 #if (defined(KLD_MODULE) && !defined(KLD_TIED)) || defined(KTR_CRITICAL) || !defined(_KERNEL) || defined(GENOFFSET)
176 #define critical_enter() critical_enter_KBI()
177 #define critical_exit() critical_exit_KBI()
178 #else
179 static __inline void
critical_enter(void)180 critical_enter(void)
181 {
182 struct thread_lite *td;
183
184 td = (struct thread_lite *)curthread;
185 td->td_critnest++;
186 atomic_interrupt_fence();
187 }
188
189 static __inline void
critical_exit(void)190 critical_exit(void)
191 {
192 struct thread_lite *td;
193
194 td = (struct thread_lite *)curthread;
195 KASSERT(td->td_critnest != 0,
196 ("critical_exit: td_critnest == 0"));
197 atomic_interrupt_fence();
198 td->td_critnest--;
199 atomic_interrupt_fence();
200 if (__predict_false(td->td_owepreempt))
201 critical_exit_preempt();
202
203 }
204 #endif
205
206 #ifdef EARLY_PRINTF
207 typedef void early_putc_t(int ch);
208 extern early_putc_t *early_putc;
209 #define CHECK_EARLY_PRINTF(x) \
210 __CONCAT(early_printf_, EARLY_PRINTF) == __CONCAT(early_printf_, x)
211 #define early_printf_1 1
212 #define early_printf_mvebu 2
213 #define early_printf_ns8250 3
214 #define early_printf_pl011 4
215 #define early_printf_snps 5
216 #define early_printf_sbi 6
217 #else
218 #define CHECK_EARLY_PRINTF(x) 0
219 #endif
220 int kvprintf(char const *, void (*)(int, void*), void *, int,
221 __va_list) __printflike(1, 0);
222 void log(int, const char *, ...) __printflike(2, 3);
223 void log_console(struct uio *);
224 void vlog(int, const char *, __va_list) __printflike(2, 0);
225 int asprintf(char **ret, struct malloc_type *mtp, const char *format,
226 ...) __printflike(3, 4);
227 int printf(const char *, ...) __printflike(1, 2);
228 int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
229 int sprintf(char *buf, const char *, ...) __printflike(2, 3);
230 int uprintf(const char *, ...) __printflike(1, 2);
231 int vprintf(const char *, __va_list) __printflike(1, 0);
232 int vasprintf(char **ret, struct malloc_type *mtp, const char *format,
233 __va_list ap) __printflike(3, 0);
234 int vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0);
235 int vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0);
236 int vsprintf(char *buf, const char *, __va_list) __printflike(2, 0);
237 int sscanf(const char *, char const * _Nonnull, ...) __scanflike(2, 3);
238 int vsscanf(const char * _Nonnull, char const * _Nonnull, __va_list) __scanflike(2, 0);
239 long strtol(const char *, char **, int);
240 u_long strtoul(const char *, char **, int);
241 quad_t strtoq(const char *, char **, int);
242 u_quad_t strtouq(const char *, char **, int);
243 void tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4);
244 void vtprintf(struct proc *, int, const char *, __va_list) __printflike(3, 0);
245 void hexdump(const void *ptr, int length, const char *hdr, int flags);
246 #define HD_COLUMN_MASK 0xff
247 #define HD_DELIM_MASK 0xff00
248 #define HD_OMIT_COUNT (1 << 16)
249 #define HD_OMIT_HEX (1 << 17)
250 #define HD_OMIT_CHARS (1 << 18)
251
252 #define ovbcopy(f, t, l) bcopy((f), (t), (l))
253 void explicit_bzero(void * _Nonnull, size_t);
254
255 void *memset(void * _Nonnull buf, int c, size_t len);
256 void *memcpy(void * _Nonnull to, const void * _Nonnull from, size_t len);
257 void *memmove(void * _Nonnull dest, const void * _Nonnull src, size_t n);
258 int memcmp(const void *b1, const void *b2, size_t len);
259
260 #ifdef SAN_NEEDS_INTERCEPTORS
261 #define SAN_INTERCEPTOR(func) \
262 __CONCAT(SAN_INTERCEPTOR_PREFIX, __CONCAT(_, func))
263 void *SAN_INTERCEPTOR(memset)(void *, int, size_t);
264 void *SAN_INTERCEPTOR(memcpy)(void *, const void *, size_t);
265 void *SAN_INTERCEPTOR(memmove)(void *, const void *, size_t);
266 int SAN_INTERCEPTOR(memcmp)(const void *, const void *, size_t);
267 #ifndef SAN_RUNTIME
268 #define bcopy(from, to, len) SAN_INTERCEPTOR(memmove)((to), (from), (len))
269 #define bzero(buf, len) SAN_INTERCEPTOR(memset)((buf), 0, (len))
270 #define bcmp(b1, b2, len) SAN_INTERCEPTOR(memcmp)((b1), (b2), (len))
271 #define memset(buf, c, len) SAN_INTERCEPTOR(memset)((buf), (c), (len))
272 #define memcpy(to, from, len) SAN_INTERCEPTOR(memcpy)((to), (from), (len))
273 #define memmove(dest, src, n) SAN_INTERCEPTOR(memmove)((dest), (src), (n))
274 #define memcmp(b1, b2, len) SAN_INTERCEPTOR(memcmp)((b1), (b2), (len))
275 #endif /* !SAN_RUNTIME */
276 #else /* !SAN_NEEDS_INTERCEPTORS */
277 #define bcopy(from, to, len) __builtin_memmove((to), (from), (len))
278 #define bzero(buf, len) __builtin_memset((buf), 0, (len))
279 #define bcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
280 #define memset(buf, c, len) __builtin_memset((buf), (c), (len))
281 #define memcpy(to, from, len) __builtin_memcpy((to), (from), (len))
282 #define memmove(dest, src, n) __builtin_memmove((dest), (src), (n))
283 #define memcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
284 #endif /* SAN_NEEDS_INTERCEPTORS */
285
286 void *memset_early(void * _Nonnull buf, int c, size_t len);
287 #define bzero_early(buf, len) memset_early((buf), 0, (len))
288 void *memcpy_early(void * _Nonnull to, const void * _Nonnull from, size_t len);
289 void *memmove_early(void * _Nonnull dest, const void * _Nonnull src, size_t n);
290 #define bcopy_early(from, to, len) memmove_early((to), (from), (len))
291
292 #define copystr(src, dst, len, outlen) ({ \
293 size_t __r, __len, *__outlen; \
294 \
295 __len = (len); \
296 __outlen = (outlen); \
297 __r = strlcpy((dst), (src), __len); \
298 if (__outlen != NULL) \
299 *__outlen = ((__r >= __len) ? __len : __r + 1); \
300 ((__r >= __len) ? ENAMETOOLONG : 0); \
301 })
302
303 int __result_use_check copyinstr(const void * __restrict udaddr,
304 void * _Nonnull __restrict kaddr, size_t len,
305 size_t * __restrict lencopied);
306 int __result_use_check copyin(const void * __restrict udaddr,
307 void * _Nonnull __restrict kaddr, size_t len);
308 int __result_use_check copyin_nofault(const void * __restrict udaddr,
309 void * _Nonnull __restrict kaddr, size_t len);
310 __nodiscard int copyout(const void * _Nonnull __restrict kaddr,
311 void * __restrict udaddr, size_t len);
312 __nodiscard int copyout_nofault(
313 const void * _Nonnull __restrict kaddr, void * __restrict udaddr,
314 size_t len);
315
316 #ifdef SAN_NEEDS_INTERCEPTORS
317 int SAN_INTERCEPTOR(copyin)(const void *, void *, size_t);
318 int SAN_INTERCEPTOR(copyinstr)(const void *, void *, size_t, size_t *);
319 int SAN_INTERCEPTOR(copyout)(const void *, void *, size_t);
320 #ifndef SAN_RUNTIME
321 #define copyin(u, k, l) SAN_INTERCEPTOR(copyin)((u), (k), (l))
322 #define copyinstr(u, k, l, lc) SAN_INTERCEPTOR(copyinstr)((u), (k), (l), (lc))
323 #define copyout(k, u, l) SAN_INTERCEPTOR(copyout)((k), (u), (l))
324 #endif /* !SAN_RUNTIME */
325 #endif /* SAN_NEEDS_INTERCEPTORS */
326
327 int fubyte(volatile const void *base);
328 long fuword(volatile const void *base);
329 int fuword16(volatile const void *base);
330 int32_t fuword32(volatile const void *base);
331 int64_t fuword64(volatile const void *base);
332 int __result_use_check fueword(volatile const void *base, long *val);
333 int __result_use_check fueword32(volatile const void *base, int32_t *val);
334 int __result_use_check fueword64(volatile const void *base, int64_t *val);
335 __nodiscard int subyte(volatile void *base, int byte);
336 __nodiscard int suword(volatile void *base, long word);
337 __nodiscard int suword16(volatile void *base, int word);
338 __nodiscard int suword32(volatile void *base, int32_t word);
339 __nodiscard int suword64(volatile void *base, int64_t word);
340 uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval);
341 u_long casuword(volatile u_long *p, u_long oldval, u_long newval);
342 int casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp,
343 uint32_t newval);
344 int casueword(volatile u_long *p, u_long oldval, u_long *oldvalp,
345 u_long newval);
346
347 #if defined(SAN_NEEDS_INTERCEPTORS) && !defined(KCSAN)
348 int SAN_INTERCEPTOR(fubyte)(volatile const void *base);
349 int SAN_INTERCEPTOR(fuword16)(volatile const void *base);
350 int SAN_INTERCEPTOR(fueword)(volatile const void *base, long *val);
351 int SAN_INTERCEPTOR(fueword32)(volatile const void *base, int32_t *val);
352 int SAN_INTERCEPTOR(fueword64)(volatile const void *base, int64_t *val);
353 int SAN_INTERCEPTOR(subyte)(volatile void *base, int byte);
354 int SAN_INTERCEPTOR(suword)(volatile void *base, long word);
355 int SAN_INTERCEPTOR(suword16)(volatile void *base, int word);
356 int SAN_INTERCEPTOR(suword32)(volatile void *base, int32_t word);
357 int SAN_INTERCEPTOR(suword64)(volatile void *base, int64_t word);
358 int SAN_INTERCEPTOR(casueword32)(volatile uint32_t *base, uint32_t oldval,
359 uint32_t *oldvalp, uint32_t newval);
360 int SAN_INTERCEPTOR(casueword)(volatile u_long *p, u_long oldval,
361 u_long *oldvalp, u_long newval);
362 #ifndef SAN_RUNTIME
363 #define fubyte(b) SAN_INTERCEPTOR(fubyte)((b))
364 #define fuword16(b) SAN_INTERCEPTOR(fuword16)((b))
365 #define fueword(b, v) SAN_INTERCEPTOR(fueword)((b), (v))
366 #define fueword32(b, v) SAN_INTERCEPTOR(fueword32)((b), (v))
367 #define fueword64(b, v) SAN_INTERCEPTOR(fueword64)((b), (v))
368 #define subyte(b, w) SAN_INTERCEPTOR(subyte)((b), (w))
369 #define suword(b, w) SAN_INTERCEPTOR(suword)((b), (w))
370 #define suword16(b, w) SAN_INTERCEPTOR(suword16)((b), (w))
371 #define suword32(b, w) SAN_INTERCEPTOR(suword32)((b), (w))
372 #define suword64(b, w) SAN_INTERCEPTOR(suword64)((b), (w))
373 #define casueword32(b, o, p, n) SAN_INTERCEPTOR(casueword32)((b), (o), (p), (n))
374 #define casueword(b, o, p, n) SAN_INTERCEPTOR(casueword)((b), (o), (p), (n))
375 #endif /* !SAN_RUNTIME */
376 #endif /* SAN_NEEDS_INTERCEPTORS && !KCSAN */
377
378 int sysbeep(int hertz, sbintime_t duration);
379
380 void hardclock(int cnt, int usermode);
381 void hardclock_sync(int cpu);
382 void statclock(int cnt, int usermode);
383 void profclock(int cnt, int usermode, uintfptr_t pc);
384
385 int hardclockintr(void);
386
387 void startprofclock(struct proc *);
388 void stopprofclock(struct proc *);
389 void cpu_startprofclock(void);
390 void cpu_stopprofclock(void);
391 void suspendclock(void);
392 void resumeclock(void);
393 sbintime_t cpu_idleclock(void);
394 void cpu_activeclock(void);
395 void cpu_new_callout(int cpu, sbintime_t bt, sbintime_t bt_opt);
396 void cpu_et_frequency(struct eventtimer *et, uint64_t newfreq);
397 extern int cpu_disable_c2_sleep;
398 extern int cpu_disable_c3_sleep;
399
400 char *kern_getenv(const char *name);
401 void freeenv(char *env);
402 int getenv_int(const char *name, int *data);
403 int getenv_uint(const char *name, unsigned int *data);
404 int getenv_long(const char *name, long *data);
405 int getenv_ulong(const char *name, unsigned long *data);
406 int getenv_string(const char *name, char *data, int size);
407 int getenv_int64(const char *name, int64_t *data);
408 int getenv_uint64(const char *name, uint64_t *data);
409 int getenv_quad(const char *name, quad_t *data);
410 int getenv_bool(const char *name, bool *data);
411 bool getenv_is_true(const char *name);
412 bool getenv_is_false(const char *name);
413 int kern_setenv(const char *name, const char *value);
414 int kern_unsetenv(const char *name);
415 int testenv(const char *name);
416
417 int getenv_array(const char *name, void *data, int size, int *psize,
418 int type_size, bool allow_signed);
419 #define GETENV_UNSIGNED false /* negative numbers not allowed */
420 #define GETENV_SIGNED true /* negative numbers allowed */
421
422 typedef uint64_t (cpu_tick_f)(void);
423 void set_cputicker(cpu_tick_f *func, uint64_t freq, bool isvariable);
424 extern cpu_tick_f *cpu_ticks;
425 uint64_t cpu_tickrate(void);
426 uint64_t cputick2usec(uint64_t tick);
427
428 #include <sys/libkern.h>
429
430 /* Initialize the world */
431 void consinit(void);
432 void cpu_initclocks(void);
433 void cpu_initclocks_bsp(void);
434 void cpu_initclocks_ap(void);
435 void usrinfoinit(void);
436
437 /* Finalize the world */
438 void kern_reboot(int) __dead2;
439 void shutdown_nice(int);
440
441 /* Stubs for obsolete functions that used to be for interrupt management */
splhigh(void)442 static __inline intrmask_t splhigh(void) { return 0; }
splimp(void)443 static __inline intrmask_t splimp(void) { return 0; }
splnet(void)444 static __inline intrmask_t splnet(void) { return 0; }
spltty(void)445 static __inline intrmask_t spltty(void) { return 0; }
splx(intrmask_t ipl __unused)446 static __inline void splx(intrmask_t ipl __unused) { return; }
447
448 /*
449 * Common `proc' functions are declared here so that proc.h can be included
450 * less often.
451 */
452 int _sleep(const void * _Nonnull chan, struct lock_object *lock, int pri,
453 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
454 #define msleep(chan, mtx, pri, wmesg, timo) \
455 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), \
456 tick_sbt * (timo), 0, C_HARDCLOCK)
457 #define msleep_sbt(chan, mtx, pri, wmesg, bt, pr, flags) \
458 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (bt), (pr), \
459 (flags))
460 int msleep_spin_sbt(const void * _Nonnull chan, struct mtx *mtx,
461 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
462 #define msleep_spin(chan, mtx, wmesg, timo) \
463 msleep_spin_sbt((chan), (mtx), (wmesg), tick_sbt * (timo), \
464 0, C_HARDCLOCK)
465 int pause_sbt(const char *wmesg, sbintime_t sbt, sbintime_t pr,
466 int flags);
467 static __inline int
pause(const char * wmesg,int timo)468 pause(const char *wmesg, int timo)
469 {
470 return (pause_sbt(wmesg, tick_sbt * timo, 0, C_HARDCLOCK));
471 }
472 #define pause_sig(wmesg, timo) \
473 pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK | C_CATCH)
474 #define tsleep(chan, pri, wmesg, timo) \
475 _sleep((chan), NULL, (pri), (wmesg), tick_sbt * (timo), \
476 0, C_HARDCLOCK)
477 #define tsleep_sbt(chan, pri, wmesg, bt, pr, flags) \
478 _sleep((chan), NULL, (pri), (wmesg), (bt), (pr), (flags))
479 void wakeup(const void *chan);
480 void wakeup_one(const void *chan);
481 void wakeup_any(const void *chan);
482
483 /*
484 * Common `struct cdev *' stuff are declared here to avoid #include poisoning
485 */
486
487 struct cdev;
488 dev_t dev2udev(struct cdev *x);
489 const char *devtoname(struct cdev *cdev);
490
491 #ifdef __LP64__
492 size_t devfs_iosize_max(void);
493 size_t iosize_max(void);
494 #endif
495
496 int poll_no_poll(int events);
497
498 /* XXX: Should be void nanodelay(u_int nsec); */
499 void DELAY(int usec);
500
501 int kcmp_cmp(uintptr_t a, uintptr_t b);
502
503 /* Root mount holdback API */
504 struct root_hold_token {
505 int flags;
506 const char *who;
507 TAILQ_ENTRY(root_hold_token) list;
508 };
509
510 struct root_hold_token *root_mount_hold(const char *identifier);
511 void root_mount_hold_token(const char *identifier, struct root_hold_token *h);
512 void root_mount_rel(struct root_hold_token *h);
513 int root_mounted(void);
514
515 /*
516 * Unit number allocation API. (kern/subr_unit.c)
517 */
518 struct unrhdr;
519 #define UNR_NO_MTX ((void *)(uintptr_t)-1)
520 struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex);
521 void init_unrhdr(struct unrhdr *uh, int low, int high, struct mtx *mutex);
522 void delete_unrhdr(struct unrhdr *uh);
523 void clear_unrhdr(struct unrhdr *uh);
524 void clean_unrhdr(struct unrhdr *uh);
525 void clean_unrhdrl(struct unrhdr *uh);
526 int alloc_unr(struct unrhdr *uh);
527 int alloc_unr_specific(struct unrhdr *uh, u_int item);
528 int alloc_unrl(struct unrhdr *uh);
529 void free_unr(struct unrhdr *uh, u_int item);
530 void *create_iter_unr(struct unrhdr *uh);
531 int next_iter_unr(void *handle);
532 void free_iter_unr(void *handle);
533
534 struct unrhdr64 {
535 uint64_t counter;
536 };
537
538 static __inline void
new_unrhdr64(struct unrhdr64 * unr64,uint64_t low)539 new_unrhdr64(struct unrhdr64 *unr64, uint64_t low)
540 {
541
542 unr64->counter = low;
543 }
544
545 static __inline uint64_t
alloc_unr64(struct unrhdr64 * unr64)546 alloc_unr64(struct unrhdr64 *unr64)
547 {
548
549 return (atomic_fetchadd_64(&unr64->counter, 1));
550 }
551
552 void intr_prof_stack_use(struct thread *td, struct trapframe *frame);
553
554 void counted_warning(unsigned *counter, const char *msg);
555
556 /*
557 * APIs to manage deprecation and obsolescence.
558 */
559 void _gone_in(int major, const char *msg, ...) __printflike(2, 3);
560 void _gone_in_dev(device_t dev, int major, const char *msg, ...)
561 __printflike(3, 4);
562 #ifdef NO_OBSOLETE_CODE
563 #define __gone_ok(m, msg) \
564 _Static_assert(m < P_OSREL_MAJOR(__FreeBSD_version)), \
565 "Obsolete code: " msg)
566 #else
567 #define __gone_ok(m, msg)
568 #endif
569 #define gone_in(major, msg, ...) do { \
570 static bool __read_mostly __gone_in_ ## __LINE__ = true; \
571 __gone_ok(major, msg); \
572 if (__predict_false(__gone_in_ ## __LINE__)) { \
573 __gone_in_ ## __LINE__ = false; \
574 _gone_in(major, msg __VA_OPT__(,) __VA_ARGS__); \
575 } \
576 } while (0)
577 #define gone_in_dev(dev, major, msg, ...) do { \
578 static bool __read_mostly __gone_in_ ## __LINE__ = true; \
579 __gone_ok(major, msg); \
580 if (__predict_false(__gone_in_ ## __LINE__)) { \
581 __gone_in_ ## __LINE__ = false; \
582 _gone_in_dev(dev, major, msg __VA_OPT__(,) __VA_ARGS__);\
583 } \
584 } while (0)
585
586 #ifdef INVARIANTS
587 #define __diagused
588 #else
589 #define __diagused __unused
590 #endif
591
592 #ifdef WITNESS
593 #define __witness_used
594 #else
595 #define __witness_used __unused
596 #endif
597
598 #endif /* _KERNEL */
599
600 __NULLABILITY_PRAGMA_POP
601 #endif /* !_SYS_SYSTM_H_ */
602