thread stage 7: Implement basic LWKTs, use a straight round-robin model for
[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 $
8ad65e08 40 * $DragonFly: src/sys/sys/systm.h,v 1.3 2003/06/20 02:09:59 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;
100struct timeval;
101struct tty;
102struct uio;
8ad65e08 103struct globaldata;
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104
105void Debugger __P((const char *msg));
8ad65e08 106void mi_gdinit __P((struct globaldata *gd, int cpu));
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107int dumpstatus __P((vm_offset_t addr, off_t count));
108int nullop __P((void));
109int eopnotsupp __P((void));
110int einval __P((void));
111int seltrue __P((dev_t dev, int which, struct proc *p));
112int ureadc __P((int, struct uio *));
113void *hashinit __P((int count, struct malloc_type *type, u_long *hashmask));
114void *phashinit __P((int count, struct malloc_type *type, u_long *nentries));
115
116void cpu_boot __P((int));
117void cpu_rootconf __P((void));
118extern uint32_t crc32_tab[];
119uint32_t crc32(const void *buf, size_t size);
120void init_param1 __P((void));
121void init_param2 __P((int physpages));
122void tablefull __P((const char *));
123int addlog __P((const char *, ...)) __printflike(1, 2);
124int kvprintf __P((char const *, void (*)(int, void*), void *, int,
125 _BSD_VA_LIST_)) __printflike(1, 0);
126int log __P((int, const char *, ...)) __printflike(2, 3);
127void logwakeup __P((void));
128void log_console __P((struct uio *));
129int printf __P((const char *, ...)) __printflike(1, 2);
130int snprintf __P((char *, size_t, const char *, ...)) __printflike(3, 4);
131int sprintf __P((char *buf, const char *, ...)) __printflike(2, 3);
132int uprintf __P((const char *, ...)) __printflike(1, 2);
133int vprintf __P((const char *, _BSD_VA_LIST_)) __printflike(1, 0);
134int vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_)) __printflike(3, 0);
135int vsprintf __P((char *buf, const char *, _BSD_VA_LIST_)) __printflike(2, 0);
136int ttyprintf __P((struct tty *, const char *, ...)) __printflike(2, 3);
137int sscanf __P((const char *, char const *, ...));
138int vsscanf __P((const char *, char const *, _BSD_VA_LIST_));
139long strtol __P((const char *, char **, int));
140u_long strtoul __P((const char *, char **, int));
141quad_t strtoq __P((const char *, char **, int));
142u_quad_t strtouq __P((const char *, char **, int));
143
144void bcopy __P((const void *from, void *to, size_t len));
145void ovbcopy __P((const void *from, void *to, size_t len));
146
147#ifdef __i386__
148extern void (*bzero) __P((void *buf, size_t len));
149#else
150void bzero __P((void *buf, size_t len));
151#endif
152
153void *memcpy __P((void *to, const void *from, size_t len));
154
155int copystr __P((const void *kfaddr, void *kdaddr, size_t len,
156 size_t *lencopied));
157int copyinstr __P((const void *udaddr, void *kaddr, size_t len,
158 size_t *lencopied));
159int copyin __P((const void *udaddr, void *kaddr, size_t len));
160int copyout __P((const void *kaddr, void *udaddr, size_t len));
161
162int fubyte __P((const void *base));
163int subyte __P((void *base, int byte));
164int suibyte __P((void *base, int byte));
165long fuword __P((const void *base));
166int suword __P((void *base, long word));
167int fusword __P((void *base));
168int susword __P((void *base, int word));
169
170void realitexpire __P((void *));
171
172void hardclock __P((struct clockframe *frame));
173void softclock __P((void));
174void statclock __P((struct clockframe *frame));
175
176void startprofclock __P((struct proc *));
177void stopprofclock __P((struct proc *));
178void setstatclockrate __P((int hzrate));
179
180char *getenv __P((const char *name));
181#define testenv getenv
182#define freeenv
183int getenv_int __P((const char *name, int *data));
184int getenv_string __P((const char *name, char *data, int size));
185int getenv_quad __P((const char *name, quad_t *data));
186extern char *kern_envp;
187
188#ifdef APM_FIXUP_CALLTODO
189void adjust_timeout_calltodo __P((struct timeval *time_change));
190#endif /* APM_FIXUP_CALLTODO */
191
192#include <sys/libkern.h>
193
194/* Initialize the world */
195void consinit __P((void));
196void cpu_initclocks __P((void));
197void nchinit __P((void));
198void usrinfoinit __P((void));
199void vntblinit __P((void));
200
201/* Finalize the world. */
202void shutdown_nice __P((int));
203
204/*
205 * Kernel to clock driver interface.
206 */
207void inittodr __P((time_t base));
208void resettodr __P((void));
209void startrtclock __P((void));
210
211/* Timeouts */
212typedef void timeout_t __P((void *)); /* timeout function type */
213#define CALLOUT_HANDLE_INITIALIZER(handle) \
214 { NULL }
215
216void callout_handle_init __P((struct callout_handle *));
217struct callout_handle timeout __P((timeout_t *, void *, int));
218void untimeout __P((timeout_t *, void *, struct callout_handle));
219
220/* Interrupt management */
221
222/*
223 * For the alpha arch, some of these functions are static __inline, and
224 * the others should be.
225 */
226#ifdef __i386__
227void setdelayed __P((void));
228void setsoftast __P((void));
229void setsoftcambio __P((void));
230void setsoftcamnet __P((void));
231void setsoftclock __P((void));
232void setsoftcrypto __P((void));
233void setsoftnet __P((void));
234void setsofttty __P((void));
235void setsoftvm __P((void));
236void setsofttq __P((void));
237void schedsoftcamnet __P((void));
238void schedsoftcambio __P((void));
239void schedsoftnet __P((void));
240void schedsofttty __P((void));
241void schedsoftvm __P((void));
242void schedsofttq __P((void));
243intrmask_t softclockpending __P((void));
244void spl0 __P((void));
245intrmask_t splbio __P((void));
246intrmask_t splcam __P((void));
247intrmask_t splclock __P((void));
248intrmask_t splcrypto __P((void));
249intrmask_t splhigh __P((void));
250intrmask_t splimp __P((void));
251intrmask_t splnet __P((void));
252intrmask_t splsoftcam __P((void));
253intrmask_t splsoftcambio __P((void));
254intrmask_t splsoftcamnet __P((void));
255intrmask_t splsoftclock __P((void));
256intrmask_t splsofttty __P((void));
257intrmask_t splsoftvm __P((void));
258intrmask_t splsofttq __P((void));
259intrmask_t splstatclock __P((void));
260intrmask_t spltty __P((void));
261intrmask_t splvm __P((void));
262void splx __P((intrmask_t ipl));
263void splz __P((void));
264#endif /* __i386__ */
265
266#ifdef __alpha__
267#include <machine/ipl.h>
268#endif
269
270#ifdef INVARIANT_SUPPORT
271void splbioassert __P((const char *msg));
272void splcamassert __P((const char *msg));
273void splclockassert __P((const char *msg));
274void splcryptoassert __P((const char *msg));
275void splhighassert __P((const char *msg));
276void splimpassert __P((const char *msg));
277void splnetassert __P((const char *msg));
278void splsoftcamassert __P((const char *msg));
279void splsoftcambioassert __P((const char *msg));
280void splsoftcamnetassert __P((const char *msg));
281void splsoftclockassert __P((const char *msg));
282void splsoftttyassert __P((const char *msg));
283void splsoftvmassert __P((const char *msg));
284void splsofttqassert __P((const char *msg));
285void splstatclockassert __P((const char *msg));
286void splttyassert __P((const char *msg));
287void splvmassert __P((const char *msg));
288#endif /* INVARIANT_SUPPORT */
289
290/*
291 * XXX It's not clear how "machine independent" these will be yet, but
292 * they are used all over the place especially in pci drivers. We would
293 * have to modify lots of drivers since <machine/cpufunc.h> no longer
294 * implicitly causes these to be defined when it #included <machine/spl.h>
295 */
296extern intrmask_t bio_imask; /* group of interrupts masked with splbio() */
297extern intrmask_t cam_imask; /* group of interrupts masked with splcam() */
298extern intrmask_t net_imask; /* group of interrupts masked with splimp() */
299extern intrmask_t stat_imask; /* interrupts masked with splstatclock() */
300extern intrmask_t tty_imask; /* group of interrupts masked with spltty() */
301
302/* Read only */
303extern const intrmask_t soft_imask; /* interrupts masked with splsoft*() */
304extern const intrmask_t softnet_imask; /* interrupt masked with splnet() */
305extern const intrmask_t softtty_imask; /* interrupt masked with splsofttty() */
306
307/*
308 * Various callout lists.
309 */
310
311/* Exit callout list declarations. */
312typedef void (*exitlist_fn) __P((struct proc *procp));
313
314int at_exit __P((exitlist_fn function));
315int rm_at_exit __P((exitlist_fn function));
316
317/* Fork callout list declarations. */
318typedef void (*forklist_fn) __P((struct proc *parent, struct proc *child,
319 int flags));
320
321int at_fork __P((forklist_fn function));
322int rm_at_fork __P((forklist_fn function));
323
324/*
325 * Not exactly a callout LIST, but a callout entry.
326 * Allow an external module to define a hardware watchdog tickler.
327 * Normally a process would do this, but there are times when the
328 * kernel needs to be able to hold off the watchdog, when the process
329 * is not active, e.g., when dumping core.
330 */
331typedef void (*watchdog_tickle_fn) __P((void));
332
333extern watchdog_tickle_fn wdog_tickler;
334
335/*
336 * Common `proc' functions are declared here so that proc.h can be included
337 * less often.
338 */
339int tsleep __P((void *chan, int pri, const char *wmesg, int timo));
340int asleep __P((void *chan, int pri, const char *wmesg, int timo));
341int await __P((int pri, int timo));
342void wakeup __P((void *chan));
343void wakeup_one __P((void *chan));
344
345/*
346 * Common `dev_t' stuff are declared here to avoid #include poisoning
347 */
348
349int major(dev_t x);
350int minor(dev_t x);
351dev_t makedev(int x, int y);
352udev_t dev2udev(dev_t x);
353dev_t udev2dev(udev_t x, int b);
354int uminor(udev_t dev);
355int umajor(udev_t dev);
356udev_t makeudev(int x, int y);
357#endif /* !_SYS_SYSTM_H_ */