Optimize lwkt_rwlock.c a bit
[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 $
f1d1c3fa 40 * $DragonFly: src/sys/sys/systm.h,v 1.4 2003/06/21 07:54:57 dillon 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
80#ifdef INVARIANTS /* The option is always available */
81#define KASSERT(exp,msg) do { if (!(exp)) panic msg; } while (0)
82#define SPLASSERT(level, msg) __CONCAT(__CONCAT(spl,level),assert)(msg)
83#define CONDSPLASSERT(cond, level, msg) do { \
84 if (cond) \
85 SPLASSERT(level, msg); \
86} while (0)
87#else
88#define KASSERT(exp,msg)
89#define SPLASSERT(level, msg)
90#define CONDSPLASSERT(cond, level, msg)
91#endif
92
93/*
94 * General function declarations.
95 */
96
97struct clockframe;
98struct malloc_type;
99struct proc;
f1d1c3fa 100struct xwait;
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101struct timeval;
102struct tty;
103struct uio;
8ad65e08 104struct globaldata;
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105
106void Debugger __P((const char *msg));
8ad65e08 107void mi_gdinit __P((struct globaldata *gd, int cpu));
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108int dumpstatus __P((vm_offset_t addr, off_t count));
109int nullop __P((void));
110int eopnotsupp __P((void));
111int einval __P((void));
112int seltrue __P((dev_t dev, int which, struct proc *p));
113int ureadc __P((int, struct uio *));
114void *hashinit __P((int count, struct malloc_type *type, u_long *hashmask));
115void *phashinit __P((int count, struct malloc_type *type, u_long *nentries));
116
117void cpu_boot __P((int));
118void cpu_rootconf __P((void));
119extern uint32_t crc32_tab[];
120uint32_t crc32(const void *buf, size_t size);
121void init_param1 __P((void));
122void init_param2 __P((int physpages));
123void tablefull __P((const char *));
124int addlog __P((const char *, ...)) __printflike(1, 2);
125int kvprintf __P((char const *, void (*)(int, void*), void *, int,
126 _BSD_VA_LIST_)) __printflike(1, 0);
127int log __P((int, const char *, ...)) __printflike(2, 3);
128void logwakeup __P((void));
129void log_console __P((struct uio *));
130int printf __P((const char *, ...)) __printflike(1, 2);
131int snprintf __P((char *, size_t, const char *, ...)) __printflike(3, 4);
132int sprintf __P((char *buf, const char *, ...)) __printflike(2, 3);
133int uprintf __P((const char *, ...)) __printflike(1, 2);
134int vprintf __P((const char *, _BSD_VA_LIST_)) __printflike(1, 0);
135int vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_)) __printflike(3, 0);
136int vsprintf __P((char *buf, const char *, _BSD_VA_LIST_)) __printflike(2, 0);
137int ttyprintf __P((struct tty *, const char *, ...)) __printflike(2, 3);
138int sscanf __P((const char *, char const *, ...));
139int vsscanf __P((const char *, char const *, _BSD_VA_LIST_));
140long strtol __P((const char *, char **, int));
141u_long strtoul __P((const char *, char **, int));
142quad_t strtoq __P((const char *, char **, int));
143u_quad_t strtouq __P((const char *, char **, int));
144
145void bcopy __P((const void *from, void *to, size_t len));
146void ovbcopy __P((const void *from, void *to, size_t len));
147
148#ifdef __i386__
149extern void (*bzero) __P((void *buf, size_t len));
150#else
151void bzero __P((void *buf, size_t len));
152#endif
153
154void *memcpy __P((void *to, const void *from, size_t len));
155
156int copystr __P((const void *kfaddr, void *kdaddr, size_t len,
157 size_t *lencopied));
158int copyinstr __P((const void *udaddr, void *kaddr, size_t len,
159 size_t *lencopied));
160int copyin __P((const void *udaddr, void *kaddr, size_t len));
161int copyout __P((const void *kaddr, void *udaddr, size_t len));
162
163int fubyte __P((const void *base));
164int subyte __P((void *base, int byte));
165int suibyte __P((void *base, int byte));
166long fuword __P((const void *base));
167int suword __P((void *base, long word));
168int fusword __P((void *base));
169int susword __P((void *base, int word));
170
171void realitexpire __P((void *));
172
173void hardclock __P((struct clockframe *frame));
174void softclock __P((void));
175void statclock __P((struct clockframe *frame));
176
177void startprofclock __P((struct proc *));
178void stopprofclock __P((struct proc *));
179void setstatclockrate __P((int hzrate));
180
181char *getenv __P((const char *name));
182#define testenv getenv
183#define freeenv
184int getenv_int __P((const char *name, int *data));
185int getenv_string __P((const char *name, char *data, int size));
186int getenv_quad __P((const char *name, quad_t *data));
187extern char *kern_envp;
188
189#ifdef APM_FIXUP_CALLTODO
190void adjust_timeout_calltodo __P((struct timeval *time_change));
191#endif /* APM_FIXUP_CALLTODO */
192
193#include <sys/libkern.h>
194
195/* Initialize the world */
196void consinit __P((void));
197void cpu_initclocks __P((void));
198void nchinit __P((void));
199void usrinfoinit __P((void));
200void vntblinit __P((void));
201
202/* Finalize the world. */
203void shutdown_nice __P((int));
204
205/*
206 * Kernel to clock driver interface.
207 */
208void inittodr __P((time_t base));
209void resettodr __P((void));
210void startrtclock __P((void));
211
212/* Timeouts */
213typedef void timeout_t __P((void *)); /* timeout function type */
214#define CALLOUT_HANDLE_INITIALIZER(handle) \
215 { NULL }
216
217void callout_handle_init __P((struct callout_handle *));
218struct callout_handle timeout __P((timeout_t *, void *, int));
219void untimeout __P((timeout_t *, void *, struct callout_handle));
220
221/* Interrupt management */
222
223/*
224 * For the alpha arch, some of these functions are static __inline, and
225 * the others should be.
226 */
227#ifdef __i386__
228void setdelayed __P((void));
229void setsoftast __P((void));
230void setsoftcambio __P((void));
231void setsoftcamnet __P((void));
232void setsoftclock __P((void));
233void setsoftcrypto __P((void));
234void setsoftnet __P((void));
235void setsofttty __P((void));
236void setsoftvm __P((void));
237void setsofttq __P((void));
238void schedsoftcamnet __P((void));
239void schedsoftcambio __P((void));
240void schedsoftnet __P((void));
241void schedsofttty __P((void));
242void schedsoftvm __P((void));
243void schedsofttq __P((void));
244intrmask_t softclockpending __P((void));
245void spl0 __P((void));
246intrmask_t splbio __P((void));
247intrmask_t splcam __P((void));
248intrmask_t splclock __P((void));
249intrmask_t splcrypto __P((void));
250intrmask_t splhigh __P((void));
251intrmask_t splimp __P((void));
252intrmask_t splnet __P((void));
253intrmask_t splsoftcam __P((void));
254intrmask_t splsoftcambio __P((void));
255intrmask_t splsoftcamnet __P((void));
256intrmask_t splsoftclock __P((void));
257intrmask_t splsofttty __P((void));
258intrmask_t splsoftvm __P((void));
259intrmask_t splsofttq __P((void));
260intrmask_t splstatclock __P((void));
261intrmask_t spltty __P((void));
262intrmask_t splvm __P((void));
263void splx __P((intrmask_t ipl));
264void splz __P((void));
265#endif /* __i386__ */
266
267#ifdef __alpha__
268#include <machine/ipl.h>
269#endif
270
271#ifdef INVARIANT_SUPPORT
272void splbioassert __P((const char *msg));
273void splcamassert __P((const char *msg));
274void splclockassert __P((const char *msg));
275void splcryptoassert __P((const char *msg));
276void splhighassert __P((const char *msg));
277void splimpassert __P((const char *msg));
278void splnetassert __P((const char *msg));
279void splsoftcamassert __P((const char *msg));
280void splsoftcambioassert __P((const char *msg));
281void splsoftcamnetassert __P((const char *msg));
282void splsoftclockassert __P((const char *msg));
283void splsoftttyassert __P((const char *msg));
284void splsoftvmassert __P((const char *msg));
285void splsofttqassert __P((const char *msg));
286void splstatclockassert __P((const char *msg));
287void splttyassert __P((const char *msg));
288void splvmassert __P((const char *msg));
289#endif /* INVARIANT_SUPPORT */
290
291/*
292 * XXX It's not clear how "machine independent" these will be yet, but
293 * they are used all over the place especially in pci drivers. We would
294 * have to modify lots of drivers since <machine/cpufunc.h> no longer
295 * implicitly causes these to be defined when it #included <machine/spl.h>
296 */
297extern intrmask_t bio_imask; /* group of interrupts masked with splbio() */
298extern intrmask_t cam_imask; /* group of interrupts masked with splcam() */
299extern intrmask_t net_imask; /* group of interrupts masked with splimp() */
300extern intrmask_t stat_imask; /* interrupts masked with splstatclock() */
301extern intrmask_t tty_imask; /* group of interrupts masked with spltty() */
302
303/* Read only */
304extern const intrmask_t soft_imask; /* interrupts masked with splsoft*() */
305extern const intrmask_t softnet_imask; /* interrupt masked with splnet() */
306extern const intrmask_t softtty_imask; /* interrupt masked with splsofttty() */
307
308/*
309 * Various callout lists.
310 */
311
312/* Exit callout list declarations. */
313typedef void (*exitlist_fn) __P((struct proc *procp));
314
315int at_exit __P((exitlist_fn function));
316int rm_at_exit __P((exitlist_fn function));
317
318/* Fork callout list declarations. */
319typedef void (*forklist_fn) __P((struct proc *parent, struct proc *child,
320 int flags));
321
322int at_fork __P((forklist_fn function));
323int rm_at_fork __P((forklist_fn function));
324
325/*
326 * Not exactly a callout LIST, but a callout entry.
327 * Allow an external module to define a hardware watchdog tickler.
328 * Normally a process would do this, but there are times when the
329 * kernel needs to be able to hold off the watchdog, when the process
330 * is not active, e.g., when dumping core.
331 */
332typedef void (*watchdog_tickle_fn) __P((void));
333
334extern watchdog_tickle_fn wdog_tickler;
335
336/*
337 * Common `proc' functions are declared here so that proc.h can be included
338 * less often.
339 */
340int tsleep __P((void *chan, int pri, const char *wmesg, int timo));
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341int xsleep __P((struct xwait *w, int pri, const char *wmesg, int timo, int *gen));
342void xwakeup __P((struct xwait *w));
343void xwait_init __P((struct xwait *w));
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344void wakeup __P((void *chan));
345void wakeup_one __P((void *chan));
346
347/*
348 * Common `dev_t' stuff are declared here to avoid #include poisoning
349 */
350
351int major(dev_t x);
352int minor(dev_t x);
353dev_t makedev(int x, int y);
354udev_t dev2udev(dev_t x);
355dev_t udev2dev(udev_t x, int b);
356int uminor(udev_t dev);
357int umajor(udev_t dev);
358udev_t makeudev(int x, int y);
359#endif /* !_SYS_SYSTM_H_ */