Add a read-ahead version of ffs_blkatoff() called ffs_blkatoff_ra(). This
[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 $
03d6a592 40 * $DragonFly: src/sys/sys/systm.h,v 1.37 2006/05/21 03:43:47 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
69extern int nswap; /* size of swap space */
70
71extern int selwait; /* select timeout address */
72
73extern u_char curpriority; /* priority of current process */
74
75extern int physmem; /* physical memory */
76
77extern dev_t dumpdev; /* dump device */
78extern long dumplo; /* offset into dumpdev */
79
80extern dev_t rootdev; /* root device */
81extern dev_t rootdevs[2]; /* possible root devices */
82extern char *rootdevnames[2]; /* names of possible root devices */
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83
84extern int boothowto; /* reboot flags, from console subsystem */
85extern int bootverbose; /* nonzero to print verbose messages */
86
87extern int maxusers; /* system tune hint */
88
17a9f566 89extern int ncpus; /* total number of cpus (real, hyper, virtual)*/
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90extern int ncpus2; /* ncpus rounded down to power of 2 */
91extern int ncpus2_shift; /* log base 2 of ncpus2 */
92extern int ncpus2_mask; /* ncpus2 - 1 */
da3639ef 93extern int clocks_running; /* timing/timeout subsystem is operational */
17a9f566 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;
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112struct malloc_type;
113struct proc;
f1d1c3fa 114struct xwait;
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115struct timeval;
116struct tty;
117struct uio;
8ad65e08 118struct globaldata;
41c20dac 119struct thread;
984263bc 120
b153f746 121void Debugger (const char *msg);
801f17b9 122void backtrace(void);
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123void mi_gdinit (struct globaldata *gd, int cpu);
124int dumpstatus (vm_offset_t addr, off_t count);
125int nullop (void);
126int eopnotsupp (void);
127int einval (void);
128int seltrue (dev_t dev, int which, struct thread *td);
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
133void cpu_boot (int);
134void cpu_rootconf (void);
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135extern uint32_t crc32_tab[];
136uint32_t crc32(const void *buf, size_t size);
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137void init_param1 (void);
138void init_param2 (int physpages);
139void tablefull (const char *);
140int addlog (const char *, ...) __printflike(1, 2);
141int kvprintf (char const *, void (*)(int, void*), void *, int,
e2565a42 142 __va_list) __printflike(1, 0);
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143int log (int, const char *, ...) __printflike(2, 3);
144void logwakeup (void);
145void log_console (struct uio *);
146int printf (const char *, ...) __printflike(1, 2);
147int snprintf (char *, size_t, const char *, ...) __printflike(3, 4);
148int sprintf (char *buf, const char *, ...) __printflike(2, 3);
149int uprintf (const char *, ...) __printflike(1, 2);
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150int vprintf (const char *, __va_list) __printflike(1, 0);
151int vsnprintf (char *, size_t, const char *, __va_list) __printflike(3, 0);
152int vsprintf (char *buf, const char *, __va_list) __printflike(2, 0);
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153int ttyprintf (struct tty *, const char *, ...) __printflike(2, 3);
154int sscanf (const char *, char const *, ...);
e2565a42 155int vsscanf (const char *, char const *, __va_list);
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156long strtol (const char *, char **, int);
157u_long strtoul (const char *, char **, int);
158quad_t strtoq (const char *, char **, int);
159u_quad_t strtouq (const char *, char **, int);
984263bc 160
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161/*
162 * note: some functions commonly used by device drivers may be passed
163 * pointers to volatile storage, volatile set to avoid warnings.
164 */
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165void bcopy (volatile const void *from, volatile void *to, size_t len);
166void ovbcopy (const void *from, void *to, size_t len);
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167
168#ifdef __i386__
b153f746 169extern void (*bzero) (volatile void *buf, size_t len);
984263bc 170#else
b153f746 171void bzero (void *buf, size_t len);
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172#endif
173
b153f746 174void *memcpy (void *to, const void *from, size_t len);
984263bc 175
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176int copystr (const void *kfaddr, void *kdaddr, size_t len,
177 size_t *lencopied);
178int copyinstr (const void *udaddr, void *kaddr, size_t len,
179 size_t *lencopied);
180int copyin (const void *udaddr, void *kaddr, size_t len);
181int copyout (const void *kaddr, void *udaddr, size_t len);
984263bc 182
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183int fubyte (const void *base);
184int subyte (void *base, int byte);
185int suibyte (void *base, int byte);
186long fuword (const void *base);
187int suword (void *base, long word);
188int fusword (void *base);
189int susword (void *base, int word);
984263bc 190
b153f746 191void realitexpire (void *);
f0f0df1c 192void DELAY(int usec);
984263bc 193
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194void startprofclock (struct proc *);
195void stopprofclock (struct proc *);
196void setstatclockrate (int hzrate);
984263bc 197
b153f746 198char *getenv (const char *name);
984263bc 199#define testenv getenv
6c6180e0 200#define freeenv(p)
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201int getenv_int (const char *name, int *data);
202int getenv_string (const char *name, char *data, int size);
203int getenv_quad (const char *name, quad_t *data);
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204extern char *kern_envp;
205
206#ifdef APM_FIXUP_CALLTODO
b153f746 207void adjust_timeout_calltodo (struct timeval *time_change);
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208#endif /* APM_FIXUP_CALLTODO */
209
210#include <sys/libkern.h>
211
212/* Initialize the world */
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213void consinit (void);
214void cpu_initclocks (void);
215void nchinit (void);
216void usrinfoinit (void);
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217
218/* Finalize the world. */
b153f746 219void shutdown_nice (int);
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220
221/*
222 * Kernel to clock driver interface.
223 */
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224void inittodr (time_t base);
225void resettodr (void);
226void startrtclock (void);
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227
228/* Timeouts */
b153f746 229typedef void timeout_t (void *); /* timeout function type */
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230#define CALLOUT_HANDLE_INITIALIZER(handle) \
231 { NULL }
232
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233#if 0
234/* OBSOLETE INTERFACE */
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235void callout_handle_init (struct callout_handle *);
236struct callout_handle timeout (timeout_t *, void *, int);
237void untimeout (timeout_t *, void *, struct callout_handle);
7eb3b2ae 238#endif
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239
240/* Interrupt management */
241
242/*
243 * For the alpha arch, some of these functions are static __inline, and
244 * the others should be.
245 */
246#ifdef __i386__
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247void setdelayed (void);
248void setsoftast (void);
249void setsoftcambio (void);
250void setsoftcamnet (void);
251void setsoftclock (void);
252void setsoftcrypto (void);
253void setsoftnet (void);
254void setsofttty (void);
255void setsoftvm (void);
256void setsofttq (void);
257void schedsoftcamnet (void);
258void schedsoftcambio (void);
259void schedsoftnet (void);
260void schedsofttty (void);
261void schedsoftvm (void);
262void schedsofttq (void);
263intrmask_t softclockpending (void);
b153f746 264void splz (void);
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265#endif /* __i386__ */
266
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267/*
268 * Various callout lists.
269 */
270
271/* Exit callout list declarations. */
b153f746 272typedef void (*exitlist_fn) (struct thread *td);
984263bc 273
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274int at_exit (exitlist_fn function);
275int rm_at_exit (exitlist_fn function);
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276
277/* Fork callout list declarations. */
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278typedef void (*forklist_fn) (struct proc *parent, struct proc *child,
279 int flags);
984263bc 280
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281int at_fork (forklist_fn function);
282int rm_at_fork (forklist_fn function);
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283
284/*
285 * Not exactly a callout LIST, but a callout entry.
286 * Allow an external module to define a hardware watchdog tickler.
287 * Normally a process would do this, but there are times when the
288 * kernel needs to be able to hold off the watchdog, when the process
289 * is not active, e.g., when dumping core.
290 */
b153f746 291typedef void (*watchdog_tickle_fn) (void);
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292
293extern watchdog_tickle_fn wdog_tickler;
294
295/*
296 * Common `proc' functions are declared here so that proc.h can be included
297 * less often.
298 */
b153f746 299int tsleep (void *chan, int slpflags, const char *wmesg, int timo);
16523a43 300void tsleep_interlock (void *chan);
344ad853 301void tstop (struct proc *);
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302void wakeup (void *chan);
303void wakeup_one (void *chan);
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304void wakeup_mycpu (void *chan);
305void wakeup_mycpu_one (void *chan);
306void wakeup_oncpu (struct globaldata *gd, void *chan);
307void wakeup_oncpu_one (struct globaldata *gd, void *chan);
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308void wakeup_domain (void *chan, int domain);
309void wakeup_domain_one (void *chan, int domain);
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310
311/*
312 * Common `dev_t' stuff are declared here to avoid #include poisoning
313 */
314
315int major(dev_t x);
316int minor(dev_t x);
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317udev_t dev2udev(dev_t x);
318dev_t udev2dev(udev_t x, int b);
319int uminor(udev_t dev);
320int umajor(udev_t dev);
321udev_t makeudev(int x, int y);
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322
323#endif /* _KERNEL */
984263bc 324#endif /* !_SYS_SYSTM_H_ */