Back out port randomization. FreeBSD users report problems with it under load.
[dragonfly.git] / sys / sys / systm.h
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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: src/sys/sys/systm.h,v 1.111.2.18 2002/12/17 18:04:02 sam Exp $
5fd012e0 40 * $DragonFly: src/sys/sys/systm.h,v 1.24 2004/10/12 19:20:48 dillon Exp $
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41 */
42
43#ifndef _SYS_SYSTM_H_
44#define _SYS_SYSTM_H_
45
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46#ifndef _MACHINE_TYPES_H_
47#include <machine/types.h>
48#endif
49#ifndef _MACHINE_STDARG_H_
50#include <machine/stdarg.h>
51#endif
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52#include <machine/atomic.h>
53#include <machine/cpufunc.h>
54#include <sys/callout.h>
55
56extern int securelevel; /* system security level (see init(8)) */
57
58extern int cold; /* nonzero if we are doing a cold boot */
59extern const char *panicstr; /* panic message */
60extern int dumping; /* system is dumping */
61extern int safepri; /* safe ipl when cold or panicing */
62extern char version[]; /* system version */
63extern char copyright[]; /* system copyright */
64
65extern int nswap; /* size of swap space */
66
67extern int selwait; /* select timeout address */
68
69extern u_char curpriority; /* priority of current process */
70
71extern int physmem; /* physical memory */
72
73extern dev_t dumpdev; /* dump device */
74extern long dumplo; /* offset into dumpdev */
75
76extern dev_t rootdev; /* root device */
77extern dev_t rootdevs[2]; /* possible root devices */
78extern char *rootdevnames[2]; /* names of possible root devices */
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79
80extern int boothowto; /* reboot flags, from console subsystem */
81extern int bootverbose; /* nonzero to print verbose messages */
82
83extern int maxusers; /* system tune hint */
84
17a9f566 85extern int ncpus; /* total number of cpus (real, hyper, virtual)*/
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86extern int ncpus2; /* ncpus rounded down to power of 2 */
87extern int ncpus2_shift; /* log base 2 of ncpus2 */
88extern int ncpus2_mask; /* ncpus2 - 1 */
da3639ef 89extern int clocks_running; /* timing/timeout subsystem is operational */
17a9f566 90
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91#ifdef INVARIANTS /* The option is always available */
92#define KASSERT(exp,msg) do { if (!(exp)) panic msg; } while (0)
6b08710e 93#define KKASSERT(exp) if (!(exp)) panic("assertion: " #exp " in %s", __FUNCTION__)
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94#define SPLASSERT(level, msg) __CONCAT(__CONCAT(spl,level),assert)(msg)
95#define CONDSPLASSERT(cond, level, msg) do { \
96 if (cond) \
97 SPLASSERT(level, msg); \
98} while (0)
99#else
100#define KASSERT(exp,msg)
41c20dac 101#define KKASSERT(exp)
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102#define SPLASSERT(level, msg)
103#define CONDSPLASSERT(cond, level, msg)
104#endif
105
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106#define CTASSERT(x) _CTASSERT(x, __LINE__)
107#define _CTASSERT(x, y) __CTASSERT(x, y)
108#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
109
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110/*
111 * General function declarations.
112 */
113
88c4d2f6 114struct intrframe;
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115struct malloc_type;
116struct proc;
f1d1c3fa 117struct xwait;
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118struct timeval;
119struct tty;
120struct uio;
8ad65e08 121struct globaldata;
41c20dac 122struct thread;
984263bc 123
b153f746 124void Debugger (const char *msg);
801f17b9 125void backtrace(void);
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126void mi_gdinit (struct globaldata *gd, int cpu);
127int dumpstatus (vm_offset_t addr, off_t count);
128int nullop (void);
129int eopnotsupp (void);
130int einval (void);
131int seltrue (dev_t dev, int which, struct thread *td);
132int ureadc (int, struct uio *);
133void *hashinit (int count, struct malloc_type *type, u_long *hashmask);
134void *phashinit (int count, struct malloc_type *type, u_long *nentries);
135
136void cpu_boot (int);
137void cpu_rootconf (void);
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138extern uint32_t crc32_tab[];
139uint32_t crc32(const void *buf, size_t size);
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140void init_param1 (void);
141void init_param2 (int physpages);
142void tablefull (const char *);
143int addlog (const char *, ...) __printflike(1, 2);
144int kvprintf (char const *, void (*)(int, void*), void *, int,
e2565a42 145 __va_list) __printflike(1, 0);
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146int log (int, const char *, ...) __printflike(2, 3);
147void logwakeup (void);
148void log_console (struct uio *);
149int printf (const char *, ...) __printflike(1, 2);
150int snprintf (char *, size_t, const char *, ...) __printflike(3, 4);
151int sprintf (char *buf, const char *, ...) __printflike(2, 3);
152int uprintf (const char *, ...) __printflike(1, 2);
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153int vprintf (const char *, __va_list) __printflike(1, 0);
154int vsnprintf (char *, size_t, const char *, __va_list) __printflike(3, 0);
155int vsprintf (char *buf, const char *, __va_list) __printflike(2, 0);
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156int ttyprintf (struct tty *, const char *, ...) __printflike(2, 3);
157int sscanf (const char *, char const *, ...);
e2565a42 158int vsscanf (const char *, char const *, __va_list);
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159long strtol (const char *, char **, int);
160u_long strtoul (const char *, char **, int);
161quad_t strtoq (const char *, char **, int);
162u_quad_t strtouq (const char *, char **, int);
984263bc 163
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164/*
165 * note: some functions commonly used by device drivers may be passed
166 * pointers to volatile storage, volatile set to avoid warnings.
167 */
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168void bcopy (volatile const void *from, volatile void *to, size_t len);
169void ovbcopy (const void *from, void *to, size_t len);
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170
171#ifdef __i386__
b153f746 172extern void (*bzero) (volatile void *buf, size_t len);
984263bc 173#else
b153f746 174void bzero (void *buf, size_t len);
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175#endif
176
b153f746 177void *memcpy (void *to, const void *from, size_t len);
984263bc 178
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179int copystr (const void *kfaddr, void *kdaddr, size_t len,
180 size_t *lencopied);
181int copyinstr (const void *udaddr, void *kaddr, size_t len,
182 size_t *lencopied);
183int copyin (const void *udaddr, void *kaddr, size_t len);
184int copyout (const void *kaddr, void *udaddr, size_t len);
984263bc 185
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186int fubyte (const void *base);
187int subyte (void *base, int byte);
188int suibyte (void *base, int byte);
189long fuword (const void *base);
190int suword (void *base, long word);
191int fusword (void *base);
192int susword (void *base, int word);
984263bc 193
b153f746 194void realitexpire (void *);
f0f0df1c 195void DELAY(int usec);
984263bc 196
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197void startprofclock (struct proc *);
198void stopprofclock (struct proc *);
199void setstatclockrate (int hzrate);
984263bc 200
b153f746 201char *getenv (const char *name);
984263bc 202#define testenv getenv
6c6180e0 203#define freeenv(p)
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204int getenv_int (const char *name, int *data);
205int getenv_string (const char *name, char *data, int size);
206int getenv_quad (const char *name, quad_t *data);
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207extern char *kern_envp;
208
209#ifdef APM_FIXUP_CALLTODO
b153f746 210void adjust_timeout_calltodo (struct timeval *time_change);
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211#endif /* APM_FIXUP_CALLTODO */
212
213#include <sys/libkern.h>
214
215/* Initialize the world */
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216void consinit (void);
217void cpu_initclocks (void);
218void nchinit (void);
219void usrinfoinit (void);
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220
221/* Finalize the world. */
b153f746 222void shutdown_nice (int);
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223
224/*
225 * Kernel to clock driver interface.
226 */
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227void inittodr (time_t base);
228void resettodr (void);
229void startrtclock (void);
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230
231/* Timeouts */
b153f746 232typedef void timeout_t (void *); /* timeout function type */
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233#define CALLOUT_HANDLE_INITIALIZER(handle) \
234 { NULL }
235
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236#if 0
237/* OBSOLETE INTERFACE */
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238void callout_handle_init (struct callout_handle *);
239struct callout_handle timeout (timeout_t *, void *, int);
240void untimeout (timeout_t *, void *, struct callout_handle);
7eb3b2ae 241#endif
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242
243/* Interrupt management */
244
245/*
246 * For the alpha arch, some of these functions are static __inline, and
247 * the others should be.
248 */
249#ifdef __i386__
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250void setdelayed (void);
251void setsoftast (void);
252void setsoftcambio (void);
253void setsoftcamnet (void);
254void setsoftclock (void);
255void setsoftcrypto (void);
256void setsoftnet (void);
257void setsofttty (void);
258void setsoftvm (void);
259void setsofttq (void);
260void schedsoftcamnet (void);
261void schedsoftcambio (void);
262void schedsoftnet (void);
263void schedsofttty (void);
264void schedsoftvm (void);
265void schedsofttq (void);
266intrmask_t softclockpending (void);
267void spl0 (void);
268intrmask_t splbio (void);
269intrmask_t splcam (void);
270intrmask_t splclock (void);
271intrmask_t splcrypto (void);
272intrmask_t splhigh (void);
273intrmask_t splimp (void);
274intrmask_t splnet (void);
275intrmask_t splsoftcam (void);
276intrmask_t splsoftcambio (void);
277intrmask_t splsoftcamnet (void);
278intrmask_t splsoftclock (void);
279intrmask_t splsofttty (void);
280intrmask_t splsoftvm (void);
281intrmask_t splsofttq (void);
282intrmask_t splstatclock (void);
283intrmask_t spltty (void);
284intrmask_t splvm (void);
285void splx (intrmask_t ipl);
286void splz (void);
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287#endif /* __i386__ */
288
289#ifdef __alpha__
290#include <machine/ipl.h>
291#endif
292
293#ifdef INVARIANT_SUPPORT
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294void splbioassert (const char *msg);
295void splcamassert (const char *msg);
296void splclockassert (const char *msg);
297void splcryptoassert (const char *msg);
298void splhighassert (const char *msg);
299void splimpassert (const char *msg);
300void splnetassert (const char *msg);
301void splsoftcamassert (const char *msg);
302void splsoftcambioassert (const char *msg);
303void splsoftcamnetassert (const char *msg);
304void splsoftclockassert (const char *msg);
305void splsoftttyassert (const char *msg);
306void splsoftvmassert (const char *msg);
307void splsofttqassert (const char *msg);
308void splstatclockassert (const char *msg);
309void splttyassert (const char *msg);
310void splvmassert (const char *msg);
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311#endif /* INVARIANT_SUPPORT */
312
313/*
314 * XXX It's not clear how "machine independent" these will be yet, but
315 * they are used all over the place especially in pci drivers. We would
316 * have to modify lots of drivers since <machine/cpufunc.h> no longer
317 * implicitly causes these to be defined when it #included <machine/spl.h>
318 */
319extern intrmask_t bio_imask; /* group of interrupts masked with splbio() */
320extern intrmask_t cam_imask; /* group of interrupts masked with splcam() */
321extern intrmask_t net_imask; /* group of interrupts masked with splimp() */
322extern intrmask_t stat_imask; /* interrupts masked with splstatclock() */
323extern intrmask_t tty_imask; /* group of interrupts masked with spltty() */
324
325/* Read only */
326extern const intrmask_t soft_imask; /* interrupts masked with splsoft*() */
327extern const intrmask_t softnet_imask; /* interrupt masked with splnet() */
328extern const intrmask_t softtty_imask; /* interrupt masked with splsofttty() */
329
330/*
331 * Various callout lists.
332 */
333
334/* Exit callout list declarations. */
b153f746 335typedef void (*exitlist_fn) (struct thread *td);
984263bc 336
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337int at_exit (exitlist_fn function);
338int rm_at_exit (exitlist_fn function);
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339
340/* Fork callout list declarations. */
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341typedef void (*forklist_fn) (struct proc *parent, struct proc *child,
342 int flags);
984263bc 343
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344int at_fork (forklist_fn function);
345int rm_at_fork (forklist_fn function);
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346
347/*
348 * Not exactly a callout LIST, but a callout entry.
349 * Allow an external module to define a hardware watchdog tickler.
350 * Normally a process would do this, but there are times when the
351 * kernel needs to be able to hold off the watchdog, when the process
352 * is not active, e.g., when dumping core.
353 */
b153f746 354typedef void (*watchdog_tickle_fn) (void);
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355
356extern watchdog_tickle_fn wdog_tickler;
357
358/*
359 * Common `proc' functions are declared here so that proc.h can be included
360 * less often.
361 */
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362int tsleep (void *chan, int slpflags, const char *wmesg, int timo);
363void wakeup (void *chan);
364void wakeup_one (void *chan);
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365
366/*
367 * Common `dev_t' stuff are declared here to avoid #include poisoning
368 */
369
370int major(dev_t x);
371int minor(dev_t x);
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372udev_t dev2udev(dev_t x);
373dev_t udev2dev(udev_t x, int b);
374int uminor(udev_t dev);
375int umajor(udev_t dev);
376udev_t makeudev(int x, int y);
377#endif /* !_SYS_SYSTM_H_ */