Add patch from FreeBSD to fix an infinite loop described at:
[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 $
527fddf7 40 * $DragonFly: src/sys/sys/systm.h,v 1.45 2006/11/07 20:48:15 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 _KERNEL
47#error "This file should not be included by userland programs."
03d6a592 48#else
d9f3f6fa 49
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50#ifndef _MACHINE_TYPES_H_
51#include <machine/types.h>
52#endif
53#ifndef _MACHINE_STDARG_H_
54#include <machine/stdarg.h>
55#endif
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56#include <machine/atomic.h>
57#include <machine/cpufunc.h>
58#include <sys/callout.h>
59
60extern int securelevel; /* system security level (see init(8)) */
61
62extern int cold; /* nonzero if we are doing a cold boot */
63extern const char *panicstr; /* panic message */
64extern int dumping; /* system is dumping */
65extern int safepri; /* safe ipl when cold or panicing */
66extern char version[]; /* system version */
67extern char copyright[]; /* system copyright */
68
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69extern int selwait; /* select timeout address */
70
71extern u_char curpriority; /* priority of current process */
72
73extern int physmem; /* physical memory */
74
b13267a5 75extern cdev_t dumpdev; /* dump device */
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76extern long dumplo; /* offset into dumpdev */
77
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78extern cdev_t rootdev; /* root device */
79extern cdev_t rootdevs[2]; /* possible root devices */
984263bc 80extern char *rootdevnames[2]; /* names of possible root devices */
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81
82extern int boothowto; /* reboot flags, from console subsystem */
83extern int bootverbose; /* nonzero to print verbose messages */
84
85extern int maxusers; /* system tune hint */
86
17a9f566 87extern int ncpus; /* total number of cpus (real, hyper, virtual)*/
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88extern int ncpus2; /* ncpus rounded down to power of 2 */
89extern int ncpus2_shift; /* log base 2 of ncpus2 */
90extern int ncpus2_mask; /* ncpus2 - 1 */
da3639ef 91extern int clocks_running; /* timing/timeout subsystem is operational */
17a9f566 92
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93extern u_int cpu_feature; /* CPUID_* features */
94
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95#ifdef INVARIANTS /* The option is always available */
96#define KASSERT(exp,msg) do { if (!(exp)) panic msg; } while (0)
5ee2acaa 97#define KKASSERT(exp) if (!(exp)) panic("assertion: %s in %s", #exp, __func__)
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98#else
99#define KASSERT(exp,msg)
41c20dac 100#define KKASSERT(exp)
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101#endif
102
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103#define CTASSERT(x) _CTASSERT(x, __LINE__)
104#define _CTASSERT(x, y) __CTASSERT(x, y)
105#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
106
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107/*
108 * General function declarations.
109 */
110
88c4d2f6 111struct intrframe;
bf765287 112struct spinlock;
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113struct malloc_type;
114struct proc;
f1d1c3fa 115struct xwait;
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116struct timeval;
117struct tty;
118struct uio;
8ad65e08 119struct globaldata;
41c20dac 120struct thread;
4a22e893 121struct trapframe;
984263bc 122
b153f746 123void Debugger (const char *msg);
801f17b9 124void backtrace(void);
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125void mi_gdinit (struct globaldata *gd, int cpu);
126int dumpstatus (vm_offset_t addr, off_t count);
127int nullop (void);
b13267a5 128int seltrue (cdev_t dev, int which);
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129int ureadc (int, struct uio *);
130void *hashinit (int count, struct malloc_type *type, u_long *hashmask);
131void *phashinit (int count, struct malloc_type *type, u_long *nentries);
132
4a22e893 133int cpu_sanitize_frame (struct trapframe *);
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134void cpu_halt (void);
135void cpu_reset (void);
b153f746 136void cpu_boot (int);
527fddf7 137
b153f746 138void cpu_rootconf (void);
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139extern uint32_t crc32_tab[];
140uint32_t crc32(const void *buf, size_t size);
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141void init_param1 (void);
142void init_param2 (int physpages);
143void tablefull (const char *);
144int addlog (const char *, ...) __printflike(1, 2);
145int kvprintf (char const *, void (*)(int, void*), void *, int,
e2565a42 146 __va_list) __printflike(1, 0);
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147int log (int, const char *, ...) __printflike(2, 3);
148void logwakeup (void);
149void log_console (struct uio *);
150int printf (const char *, ...) __printflike(1, 2);
151int snprintf (char *, size_t, const char *, ...) __printflike(3, 4);
152int sprintf (char *buf, const char *, ...) __printflike(2, 3);
153int uprintf (const char *, ...) __printflike(1, 2);
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154int vprintf (const char *, __va_list) __printflike(1, 0);
155int vsnprintf (char *, size_t, const char *, __va_list) __printflike(3, 0);
156int vsprintf (char *buf, const char *, __va_list) __printflike(2, 0);
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157int ttyprintf (struct tty *, const char *, ...) __printflike(2, 3);
158int sscanf (const char *, char const *, ...);
e2565a42 159int vsscanf (const char *, char const *, __va_list);
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160long strtol (const char *, char **, int);
161u_long strtoul (const char *, char **, int);
162quad_t strtoq (const char *, char **, int);
163u_quad_t strtouq (const char *, char **, int);
984263bc 164
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165/*
166 * note: some functions commonly used by device drivers may be passed
167 * pointers to volatile storage, volatile set to avoid warnings.
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168 *
169 * NOTE: bcopyb() - is a dumb byte-granular bcopy. This routine is
170 * explicitly not meant to be sophisticated.
171 * NOTE: bcopyi() - is a dumb int-granular bcopy (len is still in bytes).
172 * This routine is explicitly not meant to be sophisticated.
f15db79e 173 */
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174void bcopyb (const void *from, void *to, size_t len);
175void bcopyi (const void *from, void *to, size_t len);
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176void bcopy (volatile const void *from, volatile void *to, size_t len);
177void ovbcopy (const void *from, void *to, size_t len);
afaa1d56 178void bzero (volatile void *buf, size_t len);
b153f746 179void *memcpy (void *to, const void *from, size_t len);
984263bc 180
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181int copystr (const void *kfaddr, void *kdaddr, size_t len,
182 size_t *lencopied);
183int copyinstr (const void *udaddr, void *kaddr, size_t len,
184 size_t *lencopied);
185int copyin (const void *udaddr, void *kaddr, size_t len);
186int copyout (const void *kaddr, void *udaddr, size_t len);
984263bc 187
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188int fubyte (const void *base);
189int subyte (void *base, int byte);
190int suibyte (void *base, int byte);
191long fuword (const void *base);
192int suword (void *base, long word);
193int fusword (void *base);
194int susword (void *base, int word);
984263bc 195
b153f746 196void realitexpire (void *);
f0f0df1c 197void DELAY(int usec);
984263bc 198
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199void startprofclock (struct proc *);
200void stopprofclock (struct proc *);
201void setstatclockrate (int hzrate);
984263bc 202
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203char *kgetenv (const char *name);
204#define testenv kgetenv
6c6180e0 205#define freeenv(p)
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206int kgetenv_int (const char *name, int *data);
207int kgetenv_string (const char *name, char *data, int size);
208int kgetenv_quad (const char *name, quad_t *data);
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209extern char *kern_envp;
210
211#ifdef APM_FIXUP_CALLTODO
b153f746 212void adjust_timeout_calltodo (struct timeval *time_change);
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213#endif /* APM_FIXUP_CALLTODO */
214
215#include <sys/libkern.h>
216
217/* Initialize the world */
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218void consinit (void);
219void cpu_initclocks (void);
220void nchinit (void);
221void usrinfoinit (void);
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222
223/* Finalize the world. */
b153f746 224void shutdown_nice (int);
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225
226/*
227 * Kernel to clock driver interface.
228 */
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229void inittodr (time_t base);
230void resettodr (void);
231void startrtclock (void);
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232
233/* Timeouts */
b153f746 234typedef void timeout_t (void *); /* timeout function type */
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235#define CALLOUT_HANDLE_INITIALIZER(handle) \
236 { NULL }
237
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238#if 0
239/* OBSOLETE INTERFACE */
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240void callout_handle_init (struct callout_handle *);
241struct callout_handle timeout (timeout_t *, void *, int);
242void untimeout (timeout_t *, void *, struct callout_handle);
7eb3b2ae 243#endif
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244
245/* Interrupt management */
246
247/*
248 * For the alpha arch, some of these functions are static __inline, and
249 * the others should be.
250 */
251#ifdef __i386__
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252void setdelayed (void);
253void setsoftast (void);
254void setsoftcambio (void);
255void setsoftcamnet (void);
256void setsoftclock (void);
257void setsoftcrypto (void);
258void setsoftnet (void);
259void setsofttty (void);
260void setsoftvm (void);
261void setsofttq (void);
262void schedsoftcamnet (void);
263void schedsoftcambio (void);
264void schedsoftnet (void);
265void schedsofttty (void);
266void schedsoftvm (void);
267void schedsofttq (void);
268intrmask_t softclockpending (void);
b153f746 269void splz (void);
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270#endif /* __i386__ */
271
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272/*
273 * Various callout lists.
274 */
275
276/* Exit callout list declarations. */
b153f746 277typedef void (*exitlist_fn) (struct thread *td);
984263bc 278
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279int at_exit (exitlist_fn function);
280int rm_at_exit (exitlist_fn function);
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281
282/* Fork callout list declarations. */
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283typedef void (*forklist_fn) (struct proc *parent, struct proc *child,
284 int flags);
984263bc 285
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286int at_fork (forklist_fn function);
287int rm_at_fork (forklist_fn function);
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288
289/*
290 * Not exactly a callout LIST, but a callout entry.
291 * Allow an external module to define a hardware watchdog tickler.
292 * Normally a process would do this, but there are times when the
293 * kernel needs to be able to hold off the watchdog, when the process
294 * is not active, e.g., when dumping core.
295 */
b153f746 296typedef void (*watchdog_tickle_fn) (void);
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297
298extern watchdog_tickle_fn wdog_tickler;
299
300/*
301 * Common `proc' functions are declared here so that proc.h can be included
302 * less often.
303 */
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304int tsleep (void *, int, const char *, int);
305int msleep (void *, struct spinlock *, int, const char *, int);
16523a43 306void tsleep_interlock (void *chan);
344ad853 307void tstop (struct proc *);
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308void wakeup (void *chan);
309void wakeup_one (void *chan);
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310void wakeup_mycpu (void *chan);
311void wakeup_mycpu_one (void *chan);
312void wakeup_oncpu (struct globaldata *gd, void *chan);
313void wakeup_oncpu_one (struct globaldata *gd, void *chan);
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314void wakeup_domain (void *chan, int domain);
315void wakeup_domain_one (void *chan, int domain);
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316
317/*
b13267a5 318 * Common `cdev_t' stuff are declared here to avoid #include poisoning
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319 */
320
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321int major(cdev_t x);
322int minor(cdev_t x);
323udev_t dev2udev(cdev_t x);
324cdev_t udev2dev(udev_t x, int b);
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325int uminor(udev_t dev);
326int umajor(udev_t dev);
327udev_t makeudev(int x, int y);
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328
329#endif /* _KERNEL */
984263bc 330#endif /* !_SYS_SYSTM_H_ */