Linux needs %edx to be 0 on entry. It registers it as an atexit function if
[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 $
f0f0df1c 40 * $DragonFly: src/sys/sys/systm.h,v 1.12 2003/08/03 11:51:25 hmp Exp $
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41 */
42
43#ifndef _SYS_SYSTM_H_
44#define _SYS_SYSTM_H_
45
46#include <machine/atomic.h>
47#include <machine/cpufunc.h>
48#include <sys/callout.h>
49
50extern int securelevel; /* system security level (see init(8)) */
51
52extern int cold; /* nonzero if we are doing a cold boot */
53extern const char *panicstr; /* panic message */
54extern int dumping; /* system is dumping */
55extern int safepri; /* safe ipl when cold or panicing */
56extern char version[]; /* system version */
57extern char copyright[]; /* system copyright */
58
59extern int nswap; /* size of swap space */
60
61extern int selwait; /* select timeout address */
62
63extern u_char curpriority; /* priority of current process */
64
65extern int physmem; /* physical memory */
66
67extern dev_t dumpdev; /* dump device */
68extern long dumplo; /* offset into dumpdev */
69
70extern dev_t rootdev; /* root device */
71extern dev_t rootdevs[2]; /* possible root devices */
72extern char *rootdevnames[2]; /* names of possible root devices */
73extern struct vnode *rootvp; /* vnode equivalent to above */
74
75extern int boothowto; /* reboot flags, from console subsystem */
76extern int bootverbose; /* nonzero to print verbose messages */
77
78extern int maxusers; /* system tune hint */
79
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80extern int ncpus; /* total number of cpus (real, hyper, virtual)*/
81
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82#ifdef INVARIANTS /* The option is always available */
83#define KASSERT(exp,msg) do { if (!(exp)) panic msg; } while (0)
41c20dac 84#define KKASSERT(exp) if (!(exp)) panic("assertion: " #exp " in " __FUNCTION__)
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85#define SPLASSERT(level, msg) __CONCAT(__CONCAT(spl,level),assert)(msg)
86#define CONDSPLASSERT(cond, level, msg) do { \
87 if (cond) \
88 SPLASSERT(level, msg); \
89} while (0)
90#else
91#define KASSERT(exp,msg)
41c20dac 92#define KKASSERT(exp)
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93#define SPLASSERT(level, msg)
94#define CONDSPLASSERT(cond, level, msg)
95#endif
96
97/*
98 * General function declarations.
99 */
100
101struct clockframe;
102struct malloc_type;
103struct proc;
f1d1c3fa 104struct xwait;
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105struct timeval;
106struct tty;
107struct uio;
8ad65e08 108struct globaldata;
41c20dac 109struct thread;
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110
111void Debugger __P((const char *msg));
801f17b9 112void backtrace(void);
8ad65e08 113void mi_gdinit __P((struct globaldata *gd, int cpu));
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114int dumpstatus __P((vm_offset_t addr, off_t count));
115int nullop __P((void));
116int eopnotsupp __P((void));
117int einval __P((void));
41c20dac 118int seltrue __P((dev_t dev, int which, struct thread *td));
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119int ureadc __P((int, struct uio *));
120void *hashinit __P((int count, struct malloc_type *type, u_long *hashmask));
121void *phashinit __P((int count, struct malloc_type *type, u_long *nentries));
122
123void cpu_boot __P((int));
124void cpu_rootconf __P((void));
125extern uint32_t crc32_tab[];
126uint32_t crc32(const void *buf, size_t size);
127void init_param1 __P((void));
128void init_param2 __P((int physpages));
129void tablefull __P((const char *));
130int addlog __P((const char *, ...)) __printflike(1, 2);
131int kvprintf __P((char const *, void (*)(int, void*), void *, int,
132 _BSD_VA_LIST_)) __printflike(1, 0);
133int log __P((int, const char *, ...)) __printflike(2, 3);
134void logwakeup __P((void));
135void log_console __P((struct uio *));
136int printf __P((const char *, ...)) __printflike(1, 2);
137int snprintf __P((char *, size_t, const char *, ...)) __printflike(3, 4);
138int sprintf __P((char *buf, const char *, ...)) __printflike(2, 3);
139int uprintf __P((const char *, ...)) __printflike(1, 2);
140int vprintf __P((const char *, _BSD_VA_LIST_)) __printflike(1, 0);
141int vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_)) __printflike(3, 0);
142int vsprintf __P((char *buf, const char *, _BSD_VA_LIST_)) __printflike(2, 0);
143int ttyprintf __P((struct tty *, const char *, ...)) __printflike(2, 3);
144int sscanf __P((const char *, char const *, ...));
145int vsscanf __P((const char *, char const *, _BSD_VA_LIST_));
146long strtol __P((const char *, char **, int));
147u_long strtoul __P((const char *, char **, int));
148quad_t strtoq __P((const char *, char **, int));
149u_quad_t strtouq __P((const char *, char **, int));
150
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151/*
152 * note: some functions commonly used by device drivers may be passed
153 * pointers to volatile storage, volatile set to avoid warnings.
154 */
155void bcopy __P((volatile const void *from, volatile void *to, size_t len));
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156void ovbcopy __P((const void *from, void *to, size_t len));
157
158#ifdef __i386__
f15db79e 159extern void (*bzero) __P((volatile void *buf, size_t len));
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160#else
161void bzero __P((void *buf, size_t len));
162#endif
163
164void *memcpy __P((void *to, const void *from, size_t len));
165
166int copystr __P((const void *kfaddr, void *kdaddr, size_t len,
167 size_t *lencopied));
168int copyinstr __P((const void *udaddr, void *kaddr, size_t len,
169 size_t *lencopied));
170int copyin __P((const void *udaddr, void *kaddr, size_t len));
171int copyout __P((const void *kaddr, void *udaddr, size_t len));
172
173int fubyte __P((const void *base));
174int subyte __P((void *base, int byte));
175int suibyte __P((void *base, int byte));
176long fuword __P((const void *base));
177int suword __P((void *base, long word));
178int fusword __P((void *base));
179int susword __P((void *base, int word));
180
181void realitexpire __P((void *));
f0f0df1c 182void DELAY(int usec);
984263bc 183void hardclock __P((struct clockframe *frame));
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184void statclock __P((struct clockframe *frame));
185
186void startprofclock __P((struct proc *));
187void stopprofclock __P((struct proc *));
188void setstatclockrate __P((int hzrate));
189
190char *getenv __P((const char *name));
191#define testenv getenv
192#define freeenv
193int getenv_int __P((const char *name, int *data));
194int getenv_string __P((const char *name, char *data, int size));
195int getenv_quad __P((const char *name, quad_t *data));
196extern char *kern_envp;
197
198#ifdef APM_FIXUP_CALLTODO
199void adjust_timeout_calltodo __P((struct timeval *time_change));
200#endif /* APM_FIXUP_CALLTODO */
201
202#include <sys/libkern.h>
203
204/* Initialize the world */
205void consinit __P((void));
206void cpu_initclocks __P((void));
207void nchinit __P((void));
208void usrinfoinit __P((void));
209void vntblinit __P((void));
210
211/* Finalize the world. */
212void shutdown_nice __P((int));
213
214/*
215 * Kernel to clock driver interface.
216 */
217void inittodr __P((time_t base));
218void resettodr __P((void));
219void startrtclock __P((void));
220
221/* Timeouts */
222typedef void timeout_t __P((void *)); /* timeout function type */
223#define CALLOUT_HANDLE_INITIALIZER(handle) \
224 { NULL }
225
226void callout_handle_init __P((struct callout_handle *));
227struct callout_handle timeout __P((timeout_t *, void *, int));
228void untimeout __P((timeout_t *, void *, struct callout_handle));
229
230/* Interrupt management */
231
232/*
233 * For the alpha arch, some of these functions are static __inline, and
234 * the others should be.
235 */
236#ifdef __i386__
237void setdelayed __P((void));
238void setsoftast __P((void));
239void setsoftcambio __P((void));
240void setsoftcamnet __P((void));
241void setsoftclock __P((void));
242void setsoftcrypto __P((void));
243void setsoftnet __P((void));
244void setsofttty __P((void));
245void setsoftvm __P((void));
246void setsofttq __P((void));
247void schedsoftcamnet __P((void));
248void schedsoftcambio __P((void));
249void schedsoftnet __P((void));
250void schedsofttty __P((void));
251void schedsoftvm __P((void));
252void schedsofttq __P((void));
253intrmask_t softclockpending __P((void));
254void spl0 __P((void));
255intrmask_t splbio __P((void));
256intrmask_t splcam __P((void));
257intrmask_t splclock __P((void));
258intrmask_t splcrypto __P((void));
259intrmask_t splhigh __P((void));
260intrmask_t splimp __P((void));
261intrmask_t splnet __P((void));
262intrmask_t splsoftcam __P((void));
263intrmask_t splsoftcambio __P((void));
264intrmask_t splsoftcamnet __P((void));
265intrmask_t splsoftclock __P((void));
266intrmask_t splsofttty __P((void));
267intrmask_t splsoftvm __P((void));
268intrmask_t splsofttq __P((void));
269intrmask_t splstatclock __P((void));
270intrmask_t spltty __P((void));
271intrmask_t splvm __P((void));
272void splx __P((intrmask_t ipl));
273void splz __P((void));
274#endif /* __i386__ */
275
276#ifdef __alpha__
277#include <machine/ipl.h>
278#endif
279
280#ifdef INVARIANT_SUPPORT
281void splbioassert __P((const char *msg));
282void splcamassert __P((const char *msg));
283void splclockassert __P((const char *msg));
284void splcryptoassert __P((const char *msg));
285void splhighassert __P((const char *msg));
286void splimpassert __P((const char *msg));
287void splnetassert __P((const char *msg));
288void splsoftcamassert __P((const char *msg));
289void splsoftcambioassert __P((const char *msg));
290void splsoftcamnetassert __P((const char *msg));
291void splsoftclockassert __P((const char *msg));
292void splsoftttyassert __P((const char *msg));
293void splsoftvmassert __P((const char *msg));
294void splsofttqassert __P((const char *msg));
295void splstatclockassert __P((const char *msg));
296void splttyassert __P((const char *msg));
297void splvmassert __P((const char *msg));
298#endif /* INVARIANT_SUPPORT */
299
300/*
301 * XXX It's not clear how "machine independent" these will be yet, but
302 * they are used all over the place especially in pci drivers. We would
303 * have to modify lots of drivers since <machine/cpufunc.h> no longer
304 * implicitly causes these to be defined when it #included <machine/spl.h>
305 */
306extern intrmask_t bio_imask; /* group of interrupts masked with splbio() */
307extern intrmask_t cam_imask; /* group of interrupts masked with splcam() */
308extern intrmask_t net_imask; /* group of interrupts masked with splimp() */
309extern intrmask_t stat_imask; /* interrupts masked with splstatclock() */
310extern intrmask_t tty_imask; /* group of interrupts masked with spltty() */
311
312/* Read only */
313extern const intrmask_t soft_imask; /* interrupts masked with splsoft*() */
314extern const intrmask_t softnet_imask; /* interrupt masked with splnet() */
315extern const intrmask_t softtty_imask; /* interrupt masked with splsofttty() */
316
317/*
318 * Various callout lists.
319 */
320
321/* Exit callout list declarations. */
dadab5e9 322typedef void (*exitlist_fn) __P((struct thread *td));
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323
324int at_exit __P((exitlist_fn function));
325int rm_at_exit __P((exitlist_fn function));
326
327/* Fork callout list declarations. */
328typedef void (*forklist_fn) __P((struct proc *parent, struct proc *child,
329 int flags));
330
331int at_fork __P((forklist_fn function));
332int rm_at_fork __P((forklist_fn function));
333
334/*
335 * Not exactly a callout LIST, but a callout entry.
336 * Allow an external module to define a hardware watchdog tickler.
337 * Normally a process would do this, but there are times when the
338 * kernel needs to be able to hold off the watchdog, when the process
339 * is not active, e.g., when dumping core.
340 */
341typedef void (*watchdog_tickle_fn) __P((void));
342
343extern watchdog_tickle_fn wdog_tickler;
344
345/*
346 * Common `proc' functions are declared here so that proc.h can be included
347 * less often.
348 */
377d4740 349int tsleep __P((void *chan, int slpflags, const char *wmesg, int timo));
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350void wakeup __P((void *chan));
351void wakeup_one __P((void *chan));
352
353/*
354 * Common `dev_t' stuff are declared here to avoid #include poisoning
355 */
356
357int major(dev_t x);
358int minor(dev_t x);
359dev_t makedev(int x, int y);
360udev_t dev2udev(dev_t x);
361dev_t udev2dev(udev_t x, int b);
362int uminor(udev_t dev);
363int umajor(udev_t dev);
364udev_t makeudev(int x, int y);
365#endif /* !_SYS_SYSTM_H_ */