Make support for polling(4) more visible,
[dragonfly.git] / sys / sys / systm.h
CommitLineData
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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 $
362e59be 40 * $DragonFly: src/sys/sys/systm.h,v 1.78 2008/03/05 12:44:42 sephe 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)) */
7e42c007 61extern int kernel_mem_readonly; /* disable writes to kernel memory */
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62
63extern int cold; /* nonzero if we are doing a cold boot */
dbcd0c9b 64extern int tsleep_now_works; /* tsleep won't just return any more */
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65extern const char *panicstr; /* panic message */
66extern int dumping; /* system is dumping */
67extern int safepri; /* safe ipl when cold or panicing */
68extern char version[]; /* system version */
69extern char copyright[]; /* system copyright */
70
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71extern int selwait; /* select timeout address */
72
73extern u_char curpriority; /* priority of current process */
74
75extern int physmem; /* physical memory */
76
b13267a5 77extern cdev_t dumpdev; /* dump device */
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78extern int dumplo; /* OBSOLETE */
79extern u_int64_t dumplo64; /* block number into dumpdev, start of dump */
984263bc 80
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81extern cdev_t rootdev; /* root device */
82extern cdev_t rootdevs[2]; /* possible root devices */
984263bc 83extern char *rootdevnames[2]; /* names of possible root devices */
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84
85extern int boothowto; /* reboot flags, from console subsystem */
86extern int bootverbose; /* nonzero to print verbose messages */
87
88extern int maxusers; /* system tune hint */
89
17a9f566 90extern int ncpus; /* total number of cpus (real, hyper, virtual)*/
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91extern int ncpus2; /* ncpus rounded down to power of 2 */
92extern int ncpus2_shift; /* log base 2 of ncpus2 */
93extern int ncpus2_mask; /* ncpus2 - 1 */
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94extern int ncpus_fit; /* round up to a power of 2 */
95extern int ncpus_fit_mask; /* ncpus_fit - 1 */
da3639ef 96extern int clocks_running; /* timing/timeout subsystem is operational */
17a9f566 97
97ee3efc 98/* XXX TGEN these don't belong here, they're MD on i386/amd64 */
527fddf7 99extern u_int cpu_feature; /* CPUID_* features */
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100extern u_int cpu_feature2; /* CPUID2_* features */
101
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102extern int nfs_diskless_valid; /* NFS diskless params were obtained */
103extern vm_paddr_t Maxmem; /* Highest physical memory address in system */
527fddf7 104
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105#ifdef INVARIANTS /* The option is always available */
106#define KASSERT(exp,msg) do { if (!(exp)) panic msg; } while (0)
5ee2acaa 107#define KKASSERT(exp) if (!(exp)) panic("assertion: %s in %s", #exp, __func__)
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108#else
109#define KASSERT(exp,msg)
41c20dac 110#define KKASSERT(exp)
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111#endif
112
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113#define CTASSERT(x) _CTASSERT(x, __LINE__)
114#define _CTASSERT(x, y) __CTASSERT(x, y)
115#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
116
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117/*
118 * General function declarations.
119 */
120
88c4d2f6 121struct intrframe;
bf765287 122struct spinlock;
362e59be 123struct lwkt_serialize;
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124struct malloc_type;
125struct proc;
f1d1c3fa 126struct xwait;
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127struct timeval;
128struct tty;
129struct uio;
8ad65e08 130struct globaldata;
41c20dac 131struct thread;
4a22e893 132struct trapframe;
6bf59cd2 133struct user;
135d7199 134struct vmspace;
4e7c41c5 135struct savetls;
c8dfd00d 136struct krate;
984263bc 137
b153f746 138void Debugger (const char *msg);
801f17b9 139void backtrace(void);
b153f746 140void mi_gdinit (struct globaldata *gd, int cpu);
6bf59cd2 141void mi_proc0init(struct globaldata *gd, struct user *proc0paddr);
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142int dumpstatus (vm_offset_t addr, off_t count);
143int nullop (void);
b13267a5 144int seltrue (cdev_t dev, int which);
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145int ureadc (int, struct uio *);
146void *hashinit (int count, struct malloc_type *type, u_long *hashmask);
147void *phashinit (int count, struct malloc_type *type, u_long *nentries);
148
4a22e893 149int cpu_sanitize_frame (struct trapframe *);
4e7c41c5 150int cpu_sanitize_tls (struct savetls *);
b402c633 151void cpu_mplock_contested(void);
06615ccb 152void cpu_spinlock_contested(void);
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153void cpu_halt (void);
154void cpu_reset (void);
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155void cpu_boot (int);
156void cpu_rootconf (void);
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157void cpu_vmspace_alloc(struct vmspace *);
158void cpu_vmspace_free(struct vmspace *);
4e7c41c5 159void set_user_TLS(void);
431d0fef 160void set_vkernel_fp(struct trapframe *);
460426e6 161int kvm_access_check(vm_offset_t, vm_offset_t, int);
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162
163vm_paddr_t kvtop(void *addr);
164int is_physical_memory (vm_offset_t addr);
165
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166extern uint32_t crc32_tab[];
167uint32_t crc32(const void *buf, size_t size);
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168void init_param1 (void);
169void init_param2 (int physpages);
170void tablefull (const char *);
379210cb 171int kvcprintf (char const *, void (*)(int, void*), void *, int,
e2565a42 172 __va_list) __printflike(1, 0);
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173int log (int, const char *, ...) __printflike(2, 3);
174void logwakeup (void);
175void log_console (struct uio *);
169276ba 176int kprintf (const char *, ...) __printflike(1, 2);
c8dfd00d 177void krateprintf (struct krate *, const char *, ...) __printflike(2, 3);
169276ba 178int ksnprintf (char *, size_t, const char *, ...) __printflike(3, 4);
169276ba 179int ksprintf (char *buf, const char *, ...) __printflike(2, 3);
b153f746 180int uprintf (const char *, ...) __printflike(1, 2);
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181int kvprintf (const char *, __va_list) __printflike(1, 0);
182int kvsnprintf (char *, size_t, const char *, __va_list) __printflike(3, 0);
183int kvsprintf (char *buf, const char *, __va_list) __printflike(2, 0);
b153f746 184int ttyprintf (struct tty *, const char *, ...) __printflike(2, 3);
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185int ksscanf (const char *, char const *, ...);
186int kvsscanf (const char *, char const *, __va_list);
44a09dd6 187
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188long strtol (const char *, char **, int);
189u_long strtoul (const char *, char **, int);
190quad_t strtoq (const char *, char **, int);
191u_quad_t strtouq (const char *, char **, int);
984263bc 192
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193/*
194 * note: some functions commonly used by device drivers may be passed
195 * pointers to volatile storage, volatile set to avoid warnings.
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196 *
197 * NOTE: bcopyb() - is a dumb byte-granular bcopy. This routine is
198 * explicitly not meant to be sophisticated.
199 * NOTE: bcopyi() - is a dumb int-granular bcopy (len is still in bytes).
200 * This routine is explicitly not meant to be sophisticated.
f15db79e 201 */
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202void bcopyb (const void *from, void *to, size_t len);
203void bcopyi (const void *from, void *to, size_t len);
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204void bcopy (volatile const void *from, volatile void *to, size_t len);
205void ovbcopy (const void *from, void *to, size_t len);
afaa1d56 206void bzero (volatile void *buf, size_t len);
b153f746 207void *memcpy (void *to, const void *from, size_t len);
984263bc 208
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209int copystr (const void *kfaddr, void *kdaddr, size_t len,
210 size_t *lencopied);
211int copyinstr (const void *udaddr, void *kaddr, size_t len,
212 size_t *lencopied);
213int copyin (const void *udaddr, void *kaddr, size_t len);
214int copyout (const void *kaddr, void *udaddr, size_t len);
984263bc 215
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216int fubyte (const void *base);
217int subyte (void *base, int byte);
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218long fuword (const void *base);
219int suword (void *base, long word);
220int fusword (void *base);
221int susword (void *base, int word);
984263bc 222
b153f746 223void realitexpire (void *);
f0f0df1c 224void DELAY(int usec);
dbcd0c9b 225void DRIVERSLEEP(int usec);
984263bc 226
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227void startprofclock (struct proc *);
228void stopprofclock (struct proc *);
229void setstatclockrate (int hzrate);
984263bc 230
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231/*
232 * Console I/O spinlocks - these typically also hard-disable interrupts
233 * for the duration.
234 */
235void cons_lock(void);
236void cons_unlock(void);
237
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238/*
239 * Kernel environment support functions and sundry.
240 */
bc01a404 241char *kgetenv (const char *name);
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242int ksetenv(const char *name, const char *value);
243int kunsetenv(const char *name);
244void kfreeenv(char *env);
245int ktestenv(const char *name);
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246int kgetenv_int (const char *name, int *data);
247int kgetenv_string (const char *name, char *data, int size);
248int kgetenv_quad (const char *name, quad_t *data);
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249extern char *kern_envp;
250
251#ifdef APM_FIXUP_CALLTODO
b153f746 252void adjust_timeout_calltodo (struct timeval *time_change);
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253#endif /* APM_FIXUP_CALLTODO */
254
255#include <sys/libkern.h>
256
257/* Initialize the world */
a8a86718 258void mi_startup (void);
ba39e2e0 259void cpu_initclocks (void *arg __unused);
b153f746 260void nchinit (void);
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261
262/* Finalize the world. */
b153f746 263void shutdown_nice (int);
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264
265/*
266 * Kernel to clock driver interface.
267 */
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268void inittodr (time_t base);
269void resettodr (void);
270void startrtclock (void);
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271
272/* Timeouts */
b153f746 273typedef void timeout_t (void *); /* timeout function type */
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274
275/* Interrupt management */
276
277/*
278 * For the alpha arch, some of these functions are static __inline, and
279 * the others should be.
280 */
281#ifdef __i386__
b153f746 282void setdelayed (void);
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283void setsoftcambio (void);
284void setsoftcamnet (void);
0fb6ec96 285void setsoftunused02 (void);
b153f746 286void setsoftcrypto (void);
0fb6ec96 287void setsoftunused01 (void);
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288void setsofttty (void);
289void setsoftvm (void);
290void setsofttq (void);
b153f746 291void schedsofttty (void);
b153f746 292void splz (void);
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293#endif /* __i386__ */
294
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295/*
296 * Various callout lists.
297 */
298
299/* Exit callout list declarations. */
b153f746 300typedef void (*exitlist_fn) (struct thread *td);
984263bc 301
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302int at_exit (exitlist_fn function);
303int rm_at_exit (exitlist_fn function);
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304
305/* Fork callout list declarations. */
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306typedef void (*forklist_fn) (struct proc *parent, struct proc *child,
307 int flags);
984263bc 308
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309int at_fork (forklist_fn function);
310int rm_at_fork (forklist_fn function);
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311
312/*
313 * Not exactly a callout LIST, but a callout entry.
314 * Allow an external module to define a hardware watchdog tickler.
315 * Normally a process would do this, but there are times when the
316 * kernel needs to be able to hold off the watchdog, when the process
317 * is not active, e.g., when dumping core.
318 */
b153f746 319typedef void (*watchdog_tickle_fn) (void);
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320
321extern watchdog_tickle_fn wdog_tickler;
322
323/*
324 * Common `proc' functions are declared here so that proc.h can be included
325 * less often.
326 */
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327int tsleep (void *, int, const char *, int);
328int msleep (void *, struct spinlock *, int, const char *, int);
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329int serialize_sleep(void *, struct lwkt_serialize *, int,
330 const char *, int);
16523a43 331void tsleep_interlock (void *chan);
a22c590e 332int lwkt_sleep (const char *, int);
9a379a4a 333void tstop (void);
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334void wakeup (void *chan);
335void wakeup_one (void *chan);
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336void wakeup_mycpu (void *chan);
337void wakeup_mycpu_one (void *chan);
338void wakeup_oncpu (struct globaldata *gd, void *chan);
339void wakeup_oncpu_one (struct globaldata *gd, void *chan);
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340void wakeup_domain (void *chan, int domain);
341void wakeup_domain_one (void *chan, int domain);
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342
343/*
b13267a5 344 * Common `cdev_t' stuff are declared here to avoid #include poisoning
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345 */
346
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347int major(cdev_t x);
348int minor(cdev_t x);
349udev_t dev2udev(cdev_t x);
350cdev_t udev2dev(udev_t x, int b);
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351int uminor(udev_t dev);
352int umajor(udev_t dev);
353udev_t makeudev(int x, int y);
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354
355#endif /* _KERNEL */
984263bc 356#endif /* !_SYS_SYSTM_H_ */