FreeBSD/Linux Kernel Cross Reference
sys/sys/systm.h
1 /*-
2 * Copyright (c) 1982, 1988, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)systm.h 8.7 (Berkeley) 3/29/95
39 * $FreeBSD: releng/5.0/sys/sys/systm.h 103083 2002-09-07 22:11:45Z peter $
40 */
41
42 #ifndef _SYS_SYSTM_H_
43 #define _SYS_SYSTM_H_
44
45 #include <machine/atomic.h>
46 #include <machine/cpufunc.h>
47 #include <sys/callout.h>
48 #include <sys/queue.h>
49
50 extern int securelevel; /* system security level (see init(8)) */
51 extern int suser_enabled; /* suser() is permitted to return 0 */
52
53 extern int cold; /* nonzero if we are doing a cold boot */
54 extern const char *panicstr; /* panic message */
55 extern char version[]; /* system version */
56 extern char copyright[]; /* system copyright */
57 extern int kstack_pages; /* number of kernel stack pages */
58 extern int uarea_pages; /* number of user struct pages */
59
60 extern int nswap; /* size of swap space */
61
62 extern u_int nselcoll; /* select collisions since boot */
63 extern struct mtx sellock; /* select lock variable */
64 extern struct cv selwait; /* select conditional variable */
65
66 extern long physmem; /* physical memory */
67
68 extern dev_t rootdev; /* root device */
69 extern dev_t rootdevs[2]; /* possible root devices */
70 extern char *rootdevnames[2]; /* names of possible root devices */
71 extern struct vnode *rootvp; /* vnode equivalent to above */
72
73 extern int boothowto; /* reboot flags, from console subsystem */
74 extern int bootverbose; /* nonzero to print verbose messages */
75
76 extern int maxusers; /* system tune hint */
77
78 #ifdef INVARIANTS /* The option is always available */
79 #define KASSERT(exp,msg) do { if (!(exp)) panic msg; } while (0)
80 #else
81 #define KASSERT(exp,msg)
82 #endif
83
84 #define CTASSERT(x) _CTASSERT(x, __LINE__)
85 #define _CTASSERT(x, y) __CTASSERT(x, y)
86 #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
87
88 /*
89 * XXX the hints declarations are even more misplaced than most declarations
90 * in this file, since they are needed in one file (per arch) and only used
91 * in two files.
92 * XXX most of these variables should be const.
93 */
94 extern int envmode;
95 extern int hintmode; /* 0 = off. 1 = config, 2 = fallback */
96 extern int dynamic_kenv;
97 extern struct sx kenv_lock;
98 extern char *kern_envp;
99 extern char static_env[];
100 extern char static_hints[]; /* by config for now */
101
102 extern char **kenvp;
103
104 /*
105 * General function declarations.
106 */
107
108 struct clockframe;
109 struct malloc_type;
110 struct mtx;
111 struct proc;
112 struct kse;
113 struct socket;
114 struct thread;
115 struct tty;
116 struct ucred;
117 struct uio;
118 struct _jmp_buf;
119
120 int setjmp(struct _jmp_buf *);
121 void longjmp(struct _jmp_buf *, int) __dead2;
122 void Debugger(const char *msg);
123 int dumpstatus(vm_offset_t addr, off_t count);
124 int nullop(void);
125 int eopnotsupp(void);
126 int seltrue(dev_t dev, int which, struct thread *td);
127 int ureadc(int, struct uio *);
128 void hashdestroy(void *, struct malloc_type *, u_long);
129 void *hashinit(int count, struct malloc_type *type, u_long *hashmask);
130 void *phashinit(int count, struct malloc_type *type, u_long *nentries);
131
132 #ifdef RESTARTABLE_PANICS
133 void panic(const char *, ...) __printflike(1, 2);
134 #else
135 void panic(const char *, ...) __dead2 __printflike(1, 2);
136 #endif
137
138 void cpu_boot(int);
139 void cpu_rootconf(void);
140 extern uint32_t crc32_tab[];
141 uint32_t crc32(const void *buf, size_t size);
142 void critical_enter(void);
143 void critical_exit(void);
144 void init_param1(void);
145 void init_param2(long physpages);
146 void tablefull(const char *);
147 int kvprintf(char const *, void (*)(int, void*), void *, int,
148 __va_list) __printflike(1, 0);
149 void log(int, const char *, ...) __printflike(2, 3);
150 void log_console(struct uio *);
151 int printf(const char *, ...) __printflike(1, 2);
152 int snprintf(char *, size_t, const char *, ...) __printflike(3, 4);
153 int sprintf(char *buf, const char *, ...) __printflike(2, 3);
154 int uprintf(const char *, ...) __printflike(1, 2);
155 int vprintf(const char *, __va_list) __printflike(1, 0);
156 int vsnprintf(char *, size_t, const char *, __va_list) __printflike(3, 0);
157 int vsprintf(char *buf, const char *, __va_list) __printflike(2, 0);
158 int ttyprintf(struct tty *, const char *, ...) __printflike(2, 3);
159 int sscanf(const char *, char const *, ...);
160 int vsscanf(const char *, char const *, __va_list);
161 long strtol(const char *, char **, int);
162 u_long strtoul(const char *, char **, int);
163 quad_t strtoq(const char *, char **, int);
164 u_quad_t strtouq(const char *, char **, int);
165 void tprintf(struct proc *p, int pri, const char *, ...) __printflike(3, 4);
166
167 void bcopy(const void *from, void *to, size_t len);
168 void ovbcopy(const void *from, void *to, size_t len);
169
170 #ifdef __i386__
171 extern void (*bzero)(void *buf, size_t len);
172 #else
173 void bzero(void *buf, size_t len);
174 #endif
175
176 void *memcpy(void *to, const void *from, size_t len);
177
178 int copystr(const void *kfaddr, void *kdaddr, size_t len,
179 size_t *lencopied);
180 int copyinstr(const void *udaddr, void *kaddr, size_t len,
181 size_t *lencopied);
182 int copyin(const void *udaddr, void *kaddr, size_t len);
183 int copyout(const void *kaddr, void *udaddr, size_t len);
184
185 int fubyte(const void *base);
186 long fuword(const void *base);
187 int fuword16(void *base);
188 int32_t fuword32(const void *base);
189 int64_t fuword64(const void *base);
190 int subyte(void *base, int byte);
191 int suword(void *base, long word);
192 int suword16(void *base, int word);
193 int suword32(void *base, int32_t word);
194 int suword64(void *base, int64_t word);
195
196 void realitexpire(void *);
197
198 void hardclock(struct clockframe *frame);
199 void hardclock_process(struct thread *td, int user);
200 void softclock(void *);
201 void statclock(struct clockframe *frame);
202 void statclock_process(struct kse *ke, register_t pc, int user);
203
204 void startprofclock(struct proc *);
205 void stopprofclock(struct proc *);
206 void setstatclockrate(int hzrate);
207
208 /* flags for suser() and suser_cred() */
209 #define PRISON_ROOT 1
210
211 int suser(struct thread *td);
212 int suser_cred(struct ucred *cred, int flag);
213 int cr_cansee(struct ucred *u1, struct ucred *u2);
214 int cr_canseesocket(struct ucred *cred, struct socket *so);
215
216 char *getenv(const char *name);
217 void freeenv(char *env);
218 int getenv_int(const char *name, int *data);
219 int getenv_string(const char *name, char *data, int size);
220 int getenv_quad(const char *name, quad_t *data);
221 int setenv(const char *name, const char *value);
222 int unsetenv(const char *name);
223 int testenv(const char *name);
224
225 #ifdef APM_FIXUP_CALLTODO
226 struct timeval;
227 void adjust_timeout_calltodo(struct timeval *time_change);
228 #endif /* APM_FIXUP_CALLTODO */
229
230 #include <sys/libkern.h>
231
232 /* Initialize the world */
233 void consinit(void);
234 void cpu_initclocks(void);
235 void usrinfoinit(void);
236
237 /* Finalize the world. */
238 void shutdown_nice(int);
239
240 /*
241 * Kernel to clock driver interface.
242 */
243 void inittodr(time_t base);
244 void resettodr(void);
245 void startrtclock(void);
246
247 /* Timeouts */
248 typedef void timeout_t(void *); /* timeout function type */
249 #define CALLOUT_HANDLE_INITIALIZER(handle) \
250 { NULL }
251
252 void callout_handle_init(struct callout_handle *);
253 struct callout_handle timeout(timeout_t *, void *, int);
254 void untimeout(timeout_t *, void *, struct callout_handle);
255 caddr_t kern_timeout_callwheel_alloc(caddr_t v);
256 void kern_timeout_callwheel_init(void);
257
258 /* Stubs for obsolete functions that used to be for interrupt management */
259 static __inline void spl0(void) { return; }
260 static __inline intrmask_t splbio(void) { return 0; }
261 static __inline intrmask_t splcam(void) { return 0; }
262 static __inline intrmask_t splclock(void) { return 0; }
263 static __inline intrmask_t splhigh(void) { return 0; }
264 static __inline intrmask_t splimp(void) { return 0; }
265 static __inline intrmask_t splnet(void) { return 0; }
266 static __inline intrmask_t splsoftcam(void) { return 0; }
267 static __inline intrmask_t splsoftclock(void) { return 0; }
268 static __inline intrmask_t splsofttty(void) { return 0; }
269 static __inline intrmask_t splsoftvm(void) { return 0; }
270 static __inline intrmask_t splsofttq(void) { return 0; }
271 static __inline intrmask_t splstatclock(void) { return 0; }
272 static __inline intrmask_t spltty(void) { return 0; }
273 static __inline intrmask_t splvm(void) { return 0; }
274 static __inline void splx(intrmask_t ipl __unused) { return; }
275
276 /*
277 * Various callout lists.
278 */
279
280 /* Exit callout list declarations. */
281 typedef void (*exitlist_fn)(struct proc *procp);
282
283 int at_exit(exitlist_fn function);
284 int rm_at_exit(exitlist_fn function);
285
286 /* Fork callout list declarations. */
287 typedef void (*forklist_fn)(struct proc *parent, struct proc *child, int flags);
288
289 int at_fork(forklist_fn function);
290 int rm_at_fork(forklist_fn function);
291
292 /* Exec callout list declarations. */
293 typedef void (*execlist_fn)(struct proc *procp);
294
295 int at_exec(execlist_fn function);
296 int rm_at_exec(execlist_fn function);
297
298 /*
299 * Not exactly a callout LIST, but a callout entry.
300 * Allow an external module to define a hardware watchdog tickler.
301 * Normally a process would do this, but there are times when the
302 * kernel needs to be able to hold off the watchdog, when the process
303 * is not active, e.g., when dumping core.
304 */
305 typedef void (*watchdog_tickle_fn)(void);
306
307 extern watchdog_tickle_fn wdog_tickler;
308
309 /*
310 * Common `proc' functions are declared here so that proc.h can be included
311 * less often.
312 */
313 int msleep(void *chan, struct mtx *mtx, int pri, const char *wmesg,
314 int timo);
315 void abortsleep(struct thread *td);
316 #define tsleep(chan, pri, wmesg, timo) msleep(chan, NULL, pri, wmesg, timo)
317 void wakeup(void *chan);
318 void wakeup_one(void *chan);
319
320 /*
321 * Common `dev_t' stuff are declared here to avoid #include poisoning
322 */
323
324 int major(dev_t x);
325 int minor(dev_t x);
326 dev_t makedev(int x, int y);
327 udev_t dev2udev(dev_t x);
328 dev_t udev2dev(udev_t x, int b);
329 int uminor(udev_t dev);
330 int umajor(udev_t dev);
331 udev_t makeudev(int x, int y);
332
333 /* XXX: Should be void nanodelay(u_int nsec); */
334 void DELAY(int usec);
335
336 #endif /* !_SYS_SYSTM_H_ */
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