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 char version[]; /* system version */
55 extern char compiler_version[]; /* compiler version */
56 extern 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_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 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 inpcb;
131 struct lock_object;
132 struct malloc_type;
133 struct mtx;
134 struct proc;
135 struct socket;
136 struct thread;
137 struct tty;
138 struct ucred;
139 struct uio;
140 struct _jmp_buf;
141 struct trapframe;
142 struct eventtimer;
143
144 int setjmp(struct _jmp_buf *) __returns_twice;
145 void longjmp(struct _jmp_buf *, int) __dead2;
146 int dumpstatus(vm_offset_t addr, off_t count);
147 int nullop(void);
148 int eopnotsupp(void);
149 int ureadc(int, struct uio *);
150 void hashdestroy(void *, struct malloc_type *, u_long);
151 void *hashinit(int count, struct malloc_type *type, u_long *hashmask);
152 void *hashinit_flags(int count, struct malloc_type *type,
153 u_long *hashmask, int flags);
154 #define HASH_NOWAIT 0x00000001
155 #define HASH_WAITOK 0x00000002
156
157 void *phashinit(int count, struct malloc_type *type, u_long *nentries);
158 void *phashinit_flags(int count, struct malloc_type *type, u_long *nentries,
159 int flags);
160
161 void cpu_flush_dcache(void *, size_t);
162 void cpu_rootconf(void);
163 void critical_enter_KBI(void);
164 void critical_exit_KBI(void);
165 void critical_exit_preempt(void);
166 void init_param1(void);
167 void init_param2(long physpages);
168 void init_static_kenv(char *, size_t);
169 void tablefull(const char *);
170
171 /*
172 * Allocate per-thread "current" state in the linuxkpi
173 */
174 extern int (*lkpi_alloc_current)(struct thread *, int);
175 int linux_alloc_current_noop(struct thread *, int);
176
177 #if (defined(KLD_MODULE) && !defined(KLD_TIED)) || defined(KTR_CRITICAL) || !defined(_KERNEL) || defined(GENOFFSET)
178 #define critical_enter() critical_enter_KBI()
179 #define critical_exit() critical_exit_KBI()
180 #else
181 static __inline void
critical_enter(void)182 critical_enter(void)
183 {
184 struct thread_lite *td;
185
186 td = (struct thread_lite *)curthread;
187 td->td_critnest++;
188 atomic_interrupt_fence();
189 }
190
191 static __inline void
critical_exit(void)192 critical_exit(void)
193 {
194 struct thread_lite *td;
195
196 td = (struct thread_lite *)curthread;
197 KASSERT(td->td_critnest != 0,
198 ("critical_exit: td_critnest == 0"));
199 atomic_interrupt_fence();
200 td->td_critnest--;
201 atomic_interrupt_fence();
202 if (__predict_false(td->td_owepreempt))
203 critical_exit_preempt();
204
205 }
206 #endif
207
208 #ifdef EARLY_PRINTF
209 typedef void early_putc_t(int ch);
210 extern early_putc_t *early_putc;
211 #define CHECK_EARLY_PRINTF(x) \
212 __CONCAT(early_printf_, EARLY_PRINTF) == __CONCAT(early_printf_, x)
213 #define early_printf_1 1
214 #define early_printf_mvebu 2
215 #define early_printf_ns8250 3
216 #define early_printf_pl011 4
217 #define early_printf_snps 5
218 #define early_printf_sbi 6
219 #else
220 #define CHECK_EARLY_PRINTF(x) 0
221 #endif
222 int kvprintf(char const *, void (*)(int, void*), void *, int,
223 __va_list) __printflike(1, 0);
224 void log(int, const char *, ...) __printflike(2, 3);
225 void log_console(struct uio *);
226 void vlog(int, const char *, __va_list) __printflike(2, 0);
227 int asprintf(char **ret, struct malloc_type *mtp, const char *format,
228 ...) __printflike(3, 4);
229 int printf(const char *, ...) __printflike(1, 2);
230 int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
231 int sprintf(char *buf, const char *, ...) __printflike(2, 3);
232 int uprintf(const char *, ...) __printflike(1, 2);
233 int vprintf(const char *, __va_list) __printflike(1, 0);
234 int vasprintf(char **ret, struct malloc_type *mtp, const char *format,
235 __va_list ap) __printflike(3, 0);
236 int vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0);
237 int vsnrprintf(char *, size_t, int, const char *, __va_list) __printflike(4, 0);
238 int vsprintf(char *buf, const char *, __va_list) __printflike(2, 0);
239 int sscanf(const char *, char const * _Nonnull, ...) __scanflike(2, 3);
240 int vsscanf(const char * _Nonnull, char const * _Nonnull, __va_list) __scanflike(2, 0);
241 long strtol(const char *, char **, int);
242 u_long strtoul(const char *, char **, int);
243 quad_t strtoq(const char *, char **, int);
244 u_quad_t strtouq(const char *, char **, int);
245 void tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4);
246 void vtprintf(struct proc *, int, const char *, __va_list) __printflike(3, 0);
247 void hexdump(const void *ptr, int length, const char *hdr, int flags);
248 #define HD_COLUMN_MASK 0xff
249 #define HD_DELIM_MASK 0xff00
250 #define HD_OMIT_COUNT (1 << 16)
251 #define HD_OMIT_HEX (1 << 17)
252 #define HD_OMIT_CHARS (1 << 18)
253
254 #define ovbcopy(f, t, l) bcopy((f), (t), (l))
255 void explicit_bzero(void * _Nonnull, size_t);
256
257 void *memset(void * _Nonnull buf, int c, size_t len);
258 void *memcpy(void * _Nonnull to, const void * _Nonnull from, size_t len);
259 void *memmove(void * _Nonnull dest, const void * _Nonnull src, size_t n);
260 int memcmp(const void *b1, const void *b2, size_t len);
261
262 #ifdef SAN_NEEDS_INTERCEPTORS
263 #define SAN_INTERCEPTOR(func) \
264 __CONCAT(SAN_INTERCEPTOR_PREFIX, __CONCAT(_, func))
265 void *SAN_INTERCEPTOR(memset)(void *, int, size_t);
266 void *SAN_INTERCEPTOR(memcpy)(void *, const void *, size_t);
267 void *SAN_INTERCEPTOR(memmove)(void *, const void *, size_t);
268 int SAN_INTERCEPTOR(memcmp)(const void *, const void *, size_t);
269 #ifndef SAN_RUNTIME
270 #define bcopy(from, to, len) SAN_INTERCEPTOR(memmove)((to), (from), (len))
271 #define bzero(buf, len) SAN_INTERCEPTOR(memset)((buf), 0, (len))
272 #define bcmp(b1, b2, len) SAN_INTERCEPTOR(memcmp)((b1), (b2), (len))
273 #define memset(buf, c, len) SAN_INTERCEPTOR(memset)((buf), (c), (len))
274 #define memcpy(to, from, len) SAN_INTERCEPTOR(memcpy)((to), (from), (len))
275 #define memmove(dest, src, n) SAN_INTERCEPTOR(memmove)((dest), (src), (n))
276 #define memcmp(b1, b2, len) SAN_INTERCEPTOR(memcmp)((b1), (b2), (len))
277 #endif /* !SAN_RUNTIME */
278 #else /* !SAN_NEEDS_INTERCEPTORS */
279 #define bcopy(from, to, len) __builtin_memmove((to), (from), (len))
280 #define bzero(buf, len) __builtin_memset((buf), 0, (len))
281 #define bcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
282 #define memset(buf, c, len) __builtin_memset((buf), (c), (len))
283 #define memcpy(to, from, len) __builtin_memcpy((to), (from), (len))
284 #define memmove(dest, src, n) __builtin_memmove((dest), (src), (n))
285 #define memcmp(b1, b2, len) __builtin_memcmp((b1), (b2), (len))
286 #endif /* SAN_NEEDS_INTERCEPTORS */
287
288 void *memset_early(void * _Nonnull buf, int c, size_t len);
289 #define bzero_early(buf, len) memset_early((buf), 0, (len))
290 void *memcpy_early(void * _Nonnull to, const void * _Nonnull from, size_t len);
291 void *memmove_early(void * _Nonnull dest, const void * _Nonnull src, size_t n);
292 #define bcopy_early(from, to, len) memmove_early((to), (from), (len))
293
294 #define copystr(src, dst, len, outlen) ({ \
295 size_t __r, __len, *__outlen; \
296 \
297 __len = (len); \
298 __outlen = (outlen); \
299 __r = strlcpy((dst), (src), __len); \
300 if (__outlen != NULL) \
301 *__outlen = ((__r >= __len) ? __len : __r + 1); \
302 ((__r >= __len) ? ENAMETOOLONG : 0); \
303 })
304
305 int __result_use_check copyinstr(const void * __restrict udaddr,
306 void * _Nonnull __restrict kaddr, size_t len,
307 size_t * __restrict lencopied);
308 int __result_use_check copyin(const void * __restrict udaddr,
309 void * _Nonnull __restrict kaddr, size_t len);
310 int __result_use_check copyin_nofault(const void * __restrict udaddr,
311 void * _Nonnull __restrict kaddr, size_t len);
312 int __result_use_or_ignore_check copyout(const void * _Nonnull __restrict kaddr,
313 void * __restrict udaddr, size_t len);
314 int __result_use_or_ignore_check copyout_nofault(
315 const void * _Nonnull __restrict kaddr, void * __restrict udaddr,
316 size_t len);
317
318 #ifdef SAN_NEEDS_INTERCEPTORS
319 int SAN_INTERCEPTOR(copyin)(const void *, void *, size_t);
320 int SAN_INTERCEPTOR(copyinstr)(const void *, void *, size_t, size_t *);
321 int SAN_INTERCEPTOR(copyout)(const void *, void *, size_t);
322 #ifndef SAN_RUNTIME
323 #define copyin(u, k, l) SAN_INTERCEPTOR(copyin)((u), (k), (l))
324 #define copyinstr(u, k, l, lc) SAN_INTERCEPTOR(copyinstr)((u), (k), (l), (lc))
325 #define copyout(k, u, l) SAN_INTERCEPTOR(copyout)((k), (u), (l))
326 #endif /* !SAN_RUNTIME */
327 #endif /* SAN_NEEDS_INTERCEPTORS */
328
329 int fubyte(volatile const void *base);
330 long fuword(volatile const void *base);
331 int fuword16(volatile const void *base);
332 int32_t fuword32(volatile const void *base);
333 int64_t fuword64(volatile const void *base);
334 int __result_use_check fueword(volatile const void *base, long *val);
335 int __result_use_check fueword32(volatile const void *base, int32_t *val);
336 int __result_use_check fueword64(volatile const void *base, int64_t *val);
337 int __result_use_or_ignore_check subyte(volatile void *base, int byte);
338 int __result_use_or_ignore_check suword(volatile void *base, long word);
339 int __result_use_or_ignore_check suword16(volatile void *base, int word);
340 int __result_use_or_ignore_check suword32(volatile void *base, int32_t word);
341 int __result_use_or_ignore_check suword64(volatile void *base, int64_t word);
342 uint32_t casuword32(volatile uint32_t *base, uint32_t oldval, uint32_t newval);
343 u_long casuword(volatile u_long *p, u_long oldval, u_long newval);
344 int casueword32(volatile uint32_t *base, uint32_t oldval, uint32_t *oldvalp,
345 uint32_t newval);
346 int casueword(volatile u_long *p, u_long oldval, u_long *oldvalp,
347 u_long newval);
348
349 #if defined(SAN_NEEDS_INTERCEPTORS) && !defined(KCSAN)
350 int SAN_INTERCEPTOR(fubyte)(volatile const void *base);
351 int SAN_INTERCEPTOR(fuword16)(volatile const void *base);
352 int SAN_INTERCEPTOR(fueword)(volatile const void *base, long *val);
353 int SAN_INTERCEPTOR(fueword32)(volatile const void *base, int32_t *val);
354 int SAN_INTERCEPTOR(fueword64)(volatile const void *base, int64_t *val);
355 int SAN_INTERCEPTOR(subyte)(volatile void *base, int byte);
356 int SAN_INTERCEPTOR(suword)(volatile void *base, long word);
357 int SAN_INTERCEPTOR(suword16)(volatile void *base, int word);
358 int SAN_INTERCEPTOR(suword32)(volatile void *base, int32_t word);
359 int SAN_INTERCEPTOR(suword64)(volatile void *base, int64_t word);
360 int SAN_INTERCEPTOR(casueword32)(volatile uint32_t *base, uint32_t oldval,
361 uint32_t *oldvalp, uint32_t newval);
362 int SAN_INTERCEPTOR(casueword)(volatile u_long *p, u_long oldval,
363 u_long *oldvalp, u_long newval);
364 #ifndef SAN_RUNTIME
365 #define fubyte(b) SAN_INTERCEPTOR(fubyte)((b))
366 #define fuword16(b) SAN_INTERCEPTOR(fuword16)((b))
367 #define fueword(b, v) SAN_INTERCEPTOR(fueword)((b), (v))
368 #define fueword32(b, v) SAN_INTERCEPTOR(fueword32)((b), (v))
369 #define fueword64(b, v) SAN_INTERCEPTOR(fueword64)((b), (v))
370 #define subyte(b, w) SAN_INTERCEPTOR(subyte)((b), (w))
371 #define suword(b, w) SAN_INTERCEPTOR(suword)((b), (w))
372 #define suword16(b, w) SAN_INTERCEPTOR(suword16)((b), (w))
373 #define suword32(b, w) SAN_INTERCEPTOR(suword32)((b), (w))
374 #define suword64(b, w) SAN_INTERCEPTOR(suword64)((b), (w))
375 #define casueword32(b, o, p, n) SAN_INTERCEPTOR(casueword32)((b), (o), (p), (n))
376 #define casueword(b, o, p, n) SAN_INTERCEPTOR(casueword)((b), (o), (p), (n))
377 #endif /* !SAN_RUNTIME */
378 #endif /* SAN_NEEDS_INTERCEPTORS && !KCSAN */
379
380 int sysbeep(int hertz, sbintime_t duration);
381
382 void hardclock(int cnt, int usermode);
383 void hardclock_sync(int cpu);
384 void statclock(int cnt, int usermode);
385 void profclock(int cnt, int usermode, uintfptr_t pc);
386
387 int hardclockintr(void);
388
389 void startprofclock(struct proc *);
390 void stopprofclock(struct proc *);
391 void cpu_startprofclock(void);
392 void cpu_stopprofclock(void);
393 void suspendclock(void);
394 void resumeclock(void);
395 sbintime_t cpu_idleclock(void);
396 void cpu_activeclock(void);
397 void cpu_new_callout(int cpu, sbintime_t bt, sbintime_t bt_opt);
398 void cpu_et_frequency(struct eventtimer *et, uint64_t newfreq);
399 extern int cpu_disable_c2_sleep;
400 extern int cpu_disable_c3_sleep;
401
402 extern void (*tcp_hpts_softclock)(void);
403 extern volatile uint32_t __read_frequently hpts_that_need_softclock;
404
405 #define tcp_hpts_softclock() do { \
406 if (hpts_that_need_softclock > 0) \
407 tcp_hpts_softclock(); \
408 } while (0)
409
410 char *kern_getenv(const char *name);
411 void freeenv(char *env);
412 int getenv_int(const char *name, int *data);
413 int getenv_uint(const char *name, unsigned int *data);
414 int getenv_long(const char *name, long *data);
415 int getenv_ulong(const char *name, unsigned long *data);
416 int getenv_string(const char *name, char *data, int size);
417 int getenv_int64(const char *name, int64_t *data);
418 int getenv_uint64(const char *name, uint64_t *data);
419 int getenv_quad(const char *name, quad_t *data);
420 int getenv_bool(const char *name, bool *data);
421 bool getenv_is_true(const char *name);
422 bool getenv_is_false(const char *name);
423 int kern_setenv(const char *name, const char *value);
424 int kern_unsetenv(const char *name);
425 int testenv(const char *name);
426
427 int getenv_array(const char *name, void *data, int size, int *psize,
428 int type_size, bool allow_signed);
429 #define GETENV_UNSIGNED false /* negative numbers not allowed */
430 #define GETENV_SIGNED true /* negative numbers allowed */
431
432 typedef uint64_t (cpu_tick_f)(void);
433 void set_cputicker(cpu_tick_f *func, uint64_t freq, bool isvariable);
434 extern cpu_tick_f *cpu_ticks;
435 uint64_t cpu_tickrate(void);
436 uint64_t cputick2usec(uint64_t tick);
437
438 #include <sys/libkern.h>
439
440 /* Initialize the world */
441 void consinit(void);
442 void cpu_initclocks(void);
443 void cpu_initclocks_bsp(void);
444 void cpu_initclocks_ap(void);
445 void usrinfoinit(void);
446
447 /* Finalize the world */
448 void kern_reboot(int) __dead2;
449 void shutdown_nice(int);
450
451 /* Stubs for obsolete functions that used to be for interrupt management */
splhigh(void)452 static __inline intrmask_t splhigh(void) { return 0; }
splimp(void)453 static __inline intrmask_t splimp(void) { return 0; }
splnet(void)454 static __inline intrmask_t splnet(void) { return 0; }
spltty(void)455 static __inline intrmask_t spltty(void) { return 0; }
splx(intrmask_t ipl __unused)456 static __inline void splx(intrmask_t ipl __unused) { return; }
457
458 /*
459 * Common `proc' functions are declared here so that proc.h can be included
460 * less often.
461 */
462 int _sleep(const void * _Nonnull chan, struct lock_object *lock, int pri,
463 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
464 #define msleep(chan, mtx, pri, wmesg, timo) \
465 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), \
466 tick_sbt * (timo), 0, C_HARDCLOCK)
467 #define msleep_sbt(chan, mtx, pri, wmesg, bt, pr, flags) \
468 _sleep((chan), &(mtx)->lock_object, (pri), (wmesg), (bt), (pr), \
469 (flags))
470 int msleep_spin_sbt(const void * _Nonnull chan, struct mtx *mtx,
471 const char *wmesg, sbintime_t sbt, sbintime_t pr, int flags);
472 #define msleep_spin(chan, mtx, wmesg, timo) \
473 msleep_spin_sbt((chan), (mtx), (wmesg), tick_sbt * (timo), \
474 0, C_HARDCLOCK)
475 int pause_sbt(const char *wmesg, sbintime_t sbt, sbintime_t pr,
476 int flags);
477 static __inline int
pause(const char * wmesg,int timo)478 pause(const char *wmesg, int timo)
479 {
480 return (pause_sbt(wmesg, tick_sbt * timo, 0, C_HARDCLOCK));
481 }
482 #define pause_sig(wmesg, timo) \
483 pause_sbt((wmesg), tick_sbt * (timo), 0, C_HARDCLOCK | C_CATCH)
484 #define tsleep(chan, pri, wmesg, timo) \
485 _sleep((chan), NULL, (pri), (wmesg), tick_sbt * (timo), \
486 0, C_HARDCLOCK)
487 #define tsleep_sbt(chan, pri, wmesg, bt, pr, flags) \
488 _sleep((chan), NULL, (pri), (wmesg), (bt), (pr), (flags))
489 void wakeup(const void *chan);
490 void wakeup_one(const void *chan);
491 void wakeup_any(const void *chan);
492
493 /*
494 * Common `struct cdev *' stuff are declared here to avoid #include poisoning
495 */
496
497 struct cdev;
498 dev_t dev2udev(struct cdev *x);
499 const char *devtoname(struct cdev *cdev);
500
501 #ifdef __LP64__
502 size_t devfs_iosize_max(void);
503 size_t iosize_max(void);
504 #endif
505
506 int poll_no_poll(int events);
507
508 /* XXX: Should be void nanodelay(u_int nsec); */
509 void DELAY(int usec);
510
511 int kcmp_cmp(uintptr_t a, uintptr_t b);
512
513 /* Root mount holdback API */
514 struct root_hold_token {
515 int flags;
516 const char *who;
517 TAILQ_ENTRY(root_hold_token) list;
518 };
519
520 struct root_hold_token *root_mount_hold(const char *identifier);
521 void root_mount_hold_token(const char *identifier, struct root_hold_token *h);
522 void root_mount_rel(struct root_hold_token *h);
523 int root_mounted(void);
524
525 /*
526 * Unit number allocation API. (kern/subr_unit.c)
527 */
528 struct unrhdr;
529 #define UNR_NO_MTX ((void *)(uintptr_t)-1)
530 struct unrhdr *new_unrhdr(int low, int high, struct mtx *mutex);
531 void init_unrhdr(struct unrhdr *uh, int low, int high, struct mtx *mutex);
532 void delete_unrhdr(struct unrhdr *uh);
533 void clear_unrhdr(struct unrhdr *uh);
534 void clean_unrhdr(struct unrhdr *uh);
535 void clean_unrhdrl(struct unrhdr *uh);
536 int alloc_unr(struct unrhdr *uh);
537 int alloc_unr_specific(struct unrhdr *uh, u_int item);
538 int alloc_unrl(struct unrhdr *uh);
539 void free_unr(struct unrhdr *uh, u_int item);
540 void *create_iter_unr(struct unrhdr *uh);
541 int next_iter_unr(void *handle);
542 void free_iter_unr(void *handle);
543
544 struct unrhdr64 {
545 uint64_t counter;
546 };
547
548 static __inline void
new_unrhdr64(struct unrhdr64 * unr64,uint64_t low)549 new_unrhdr64(struct unrhdr64 *unr64, uint64_t low)
550 {
551
552 unr64->counter = low;
553 }
554
555 static __inline uint64_t
alloc_unr64(struct unrhdr64 * unr64)556 alloc_unr64(struct unrhdr64 *unr64)
557 {
558
559 return (atomic_fetchadd_64(&unr64->counter, 1));
560 }
561
562 void intr_prof_stack_use(struct thread *td, struct trapframe *frame);
563
564 void counted_warning(unsigned *counter, const char *msg);
565
566 /*
567 * APIs to manage deprecation and obsolescence.
568 */
569 void _gone_in(int major, const char *msg);
570 void _gone_in_dev(device_t dev, int major, const char *msg);
571 #ifdef NO_OBSOLETE_CODE
572 #define __gone_ok(m, msg) \
573 _Static_assert(m < P_OSREL_MAJOR(__FreeBSD_version)), \
574 "Obsolete code: " msg);
575 #else
576 #define __gone_ok(m, msg)
577 #endif
578 #define gone_in(major, msg) __gone_ok(major, msg) _gone_in(major, msg)
579 #define gone_in_dev(dev, major, msg) __gone_ok(major, msg) _gone_in_dev(dev, major, msg)
580
581 #ifdef INVARIANTS
582 #define __diagused
583 #else
584 #define __diagused __unused
585 #endif
586
587 #ifdef WITNESS
588 #define __witness_used
589 #else
590 #define __witness_used __unused
591 #endif
592
593 #endif /* _KERNEL */
594
595 __NULLABILITY_PRAGMA_POP
596 #endif /* !_SYS_SYSTM_H_ */
597