The normal ATA driver is capable of handling 48 bit block addressing, but
[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 $
dbcd0c9b 40 * $DragonFly: src/sys/sys/systm.h,v 1.69 2007/05/01 00:05:18 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)) */
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 long dumplo; /* offset into dumpdev */
79
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80extern cdev_t rootdev; /* root device */
81extern cdev_t rootdevs[2]; /* possible root devices */
984263bc 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 */
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93extern int ncpus_fit; /* round up to a power of 2 */
94extern int ncpus_fit_mask; /* ncpus_fit - 1 */
da3639ef 95extern int clocks_running; /* timing/timeout subsystem is operational */
17a9f566 96
97ee3efc 97/* XXX TGEN these don't belong here, they're MD on i386/amd64 */
527fddf7 98extern u_int cpu_feature; /* CPUID_* features */
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99extern u_int cpu_feature2; /* CPUID2_* features */
100
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101extern int nfs_diskless_valid; /* NFS diskless params were obtained */
102extern vm_paddr_t Maxmem; /* Highest physical memory address in system */
527fddf7 103
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104#ifdef INVARIANTS /* The option is always available */
105#define KASSERT(exp,msg) do { if (!(exp)) panic msg; } while (0)
5ee2acaa 106#define KKASSERT(exp) if (!(exp)) panic("assertion: %s in %s", #exp, __func__)
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107#else
108#define KASSERT(exp,msg)
41c20dac 109#define KKASSERT(exp)
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110#endif
111
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112#define CTASSERT(x) _CTASSERT(x, __LINE__)
113#define _CTASSERT(x, y) __CTASSERT(x, y)
114#define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1]
115
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116/*
117 * General function declarations.
118 */
119
88c4d2f6 120struct intrframe;
bf765287 121struct spinlock;
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122struct malloc_type;
123struct proc;
f1d1c3fa 124struct xwait;
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125struct timeval;
126struct tty;
127struct uio;
8ad65e08 128struct globaldata;
41c20dac 129struct thread;
4a22e893 130struct trapframe;
6bf59cd2 131struct user;
135d7199 132struct vmspace;
4e7c41c5 133struct savetls;
984263bc 134
b153f746 135void Debugger (const char *msg);
801f17b9 136void backtrace(void);
b153f746 137void mi_gdinit (struct globaldata *gd, int cpu);
6bf59cd2 138void mi_proc0init(struct globaldata *gd, struct user *proc0paddr);
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139int dumpstatus (vm_offset_t addr, off_t count);
140int nullop (void);
b13267a5 141int seltrue (cdev_t dev, int which);
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142int ureadc (int, struct uio *);
143void *hashinit (int count, struct malloc_type *type, u_long *hashmask);
144void *phashinit (int count, struct malloc_type *type, u_long *nentries);
145
4a22e893 146int cpu_sanitize_frame (struct trapframe *);
4e7c41c5 147int cpu_sanitize_tls (struct savetls *);
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148void cpu_halt (void);
149void cpu_reset (void);
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150void cpu_boot (int);
151void cpu_rootconf (void);
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152void cpu_vmspace_alloc(struct vmspace *);
153void cpu_vmspace_free(struct vmspace *);
4e7c41c5 154void set_user_TLS(void);
431d0fef 155void set_vkernel_fp(struct trapframe *);
460426e6 156int kvm_access_check(vm_offset_t, vm_offset_t, int);
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157
158vm_paddr_t kvtop(void *addr);
159int is_physical_memory (vm_offset_t addr);
160
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161extern uint32_t crc32_tab[];
162uint32_t crc32(const void *buf, size_t size);
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163void init_param1 (void);
164void init_param2 (int physpages);
165void tablefull (const char *);
379210cb 166int kvcprintf (char const *, void (*)(int, void*), void *, int,
e2565a42 167 __va_list) __printflike(1, 0);
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168int log (int, const char *, ...) __printflike(2, 3);
169void logwakeup (void);
170void log_console (struct uio *);
169276ba 171int kprintf (const char *, ...) __printflike(1, 2);
169276ba 172int ksnprintf (char *, size_t, const char *, ...) __printflike(3, 4);
169276ba 173int ksprintf (char *buf, const char *, ...) __printflike(2, 3);
b153f746 174int uprintf (const char *, ...) __printflike(1, 2);
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175int kvprintf (const char *, __va_list) __printflike(1, 0);
176int kvsnprintf (char *, size_t, const char *, __va_list) __printflike(3, 0);
177int kvsprintf (char *buf, const char *, __va_list) __printflike(2, 0);
b153f746 178int ttyprintf (struct tty *, const char *, ...) __printflike(2, 3);
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179int ksscanf (const char *, char const *, ...);
180int kvsscanf (const char *, char const *, __va_list);
44a09dd6 181
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182long strtol (const char *, char **, int);
183u_long strtoul (const char *, char **, int);
184quad_t strtoq (const char *, char **, int);
185u_quad_t strtouq (const char *, char **, int);
984263bc 186
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187/*
188 * note: some functions commonly used by device drivers may be passed
189 * pointers to volatile storage, volatile set to avoid warnings.
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190 *
191 * NOTE: bcopyb() - is a dumb byte-granular bcopy. This routine is
192 * explicitly not meant to be sophisticated.
193 * NOTE: bcopyi() - is a dumb int-granular bcopy (len is still in bytes).
194 * This routine is explicitly not meant to be sophisticated.
f15db79e 195 */
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196void bcopyb (const void *from, void *to, size_t len);
197void bcopyi (const void *from, void *to, size_t len);
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198void bcopy (volatile const void *from, volatile void *to, size_t len);
199void ovbcopy (const void *from, void *to, size_t len);
afaa1d56 200void bzero (volatile void *buf, size_t len);
b153f746 201void *memcpy (void *to, const void *from, size_t len);
984263bc 202
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203int copystr (const void *kfaddr, void *kdaddr, size_t len,
204 size_t *lencopied);
205int copyinstr (const void *udaddr, void *kaddr, size_t len,
206 size_t *lencopied);
207int copyin (const void *udaddr, void *kaddr, size_t len);
208int copyout (const void *kaddr, void *udaddr, size_t len);
984263bc 209
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210int fubyte (const void *base);
211int subyte (void *base, int byte);
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212long fuword (const void *base);
213int suword (void *base, long word);
214int fusword (void *base);
215int susword (void *base, int word);
984263bc 216
b153f746 217void realitexpire (void *);
f0f0df1c 218void DELAY(int usec);
dbcd0c9b 219void DRIVERSLEEP(int usec);
984263bc 220
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221void startprofclock (struct proc *);
222void stopprofclock (struct proc *);
223void setstatclockrate (int hzrate);
984263bc 224
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225/*
226 * Console I/O spinlocks - these typically also hard-disable interrupts
227 * for the duration.
228 */
229void cons_lock(void);
230void cons_unlock(void);
231
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232/*
233 * Kernel environment support functions and sundry.
234 */
bc01a404 235char *kgetenv (const char *name);
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236int ksetenv(const char *name, const char *value);
237int kunsetenv(const char *name);
238void kfreeenv(char *env);
239int ktestenv(const char *name);
240/* XXX TGEN Get rid of these compat defines. */
241#define testenv ktestenv
242#define freeenv kfreeenv
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243int kgetenv_int (const char *name, int *data);
244int kgetenv_string (const char *name, char *data, int size);
245int kgetenv_quad (const char *name, quad_t *data);
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246extern char *kern_envp;
247
248#ifdef APM_FIXUP_CALLTODO
b153f746 249void adjust_timeout_calltodo (struct timeval *time_change);
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250#endif /* APM_FIXUP_CALLTODO */
251
252#include <sys/libkern.h>
253
254/* Initialize the world */
a8a86718 255void mi_startup (void);
b153f746 256void consinit (void);
ba39e2e0 257void cpu_initclocks (void *arg __unused);
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258void nchinit (void);
259void usrinfoinit (void);
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260
261/* Finalize the world. */
b153f746 262void shutdown_nice (int);
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263
264/*
265 * Kernel to clock driver interface.
266 */
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267void inittodr (time_t base);
268void resettodr (void);
269void startrtclock (void);
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270
271/* Timeouts */
b153f746 272typedef void timeout_t (void *); /* timeout function type */
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273#define CALLOUT_HANDLE_INITIALIZER(handle) \
274 { NULL }
275
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276#if 0
277/* OBSOLETE INTERFACE */
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278void callout_handle_init (struct callout_handle *);
279struct callout_handle timeout (timeout_t *, void *, int);
280void untimeout (timeout_t *, void *, struct callout_handle);
7eb3b2ae 281#endif
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282
283/* Interrupt management */
284
285/*
286 * For the alpha arch, some of these functions are static __inline, and
287 * the others should be.
288 */
289#ifdef __i386__
b153f746 290void setdelayed (void);
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291void setsoftcambio (void);
292void setsoftcamnet (void);
0fb6ec96 293void setsoftunused02 (void);
b153f746 294void setsoftcrypto (void);
0fb6ec96 295void setsoftunused01 (void);
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296void setsofttty (void);
297void setsoftvm (void);
298void setsofttq (void);
b153f746 299void schedsofttty (void);
b153f746 300void splz (void);
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301#endif /* __i386__ */
302
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303/*
304 * Various callout lists.
305 */
306
307/* Exit callout list declarations. */
b153f746 308typedef void (*exitlist_fn) (struct thread *td);
984263bc 309
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310int at_exit (exitlist_fn function);
311int rm_at_exit (exitlist_fn function);
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312
313/* Fork callout list declarations. */
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314typedef void (*forklist_fn) (struct proc *parent, struct proc *child,
315 int flags);
984263bc 316
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317int at_fork (forklist_fn function);
318int rm_at_fork (forklist_fn function);
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319
320/*
321 * Not exactly a callout LIST, but a callout entry.
322 * Allow an external module to define a hardware watchdog tickler.
323 * Normally a process would do this, but there are times when the
324 * kernel needs to be able to hold off the watchdog, when the process
325 * is not active, e.g., when dumping core.
326 */
b153f746 327typedef void (*watchdog_tickle_fn) (void);
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328
329extern watchdog_tickle_fn wdog_tickler;
330
331/*
332 * Common `proc' functions are declared here so that proc.h can be included
333 * less often.
334 */
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335int tsleep (void *, int, const char *, int);
336int msleep (void *, struct spinlock *, int, const char *, int);
16523a43 337void tsleep_interlock (void *chan);
9a379a4a 338void tstop (void);
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339void wakeup (void *chan);
340void wakeup_one (void *chan);
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341void wakeup_mycpu (void *chan);
342void wakeup_mycpu_one (void *chan);
343void wakeup_oncpu (struct globaldata *gd, void *chan);
344void wakeup_oncpu_one (struct globaldata *gd, void *chan);
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345void wakeup_domain (void *chan, int domain);
346void wakeup_domain_one (void *chan, int domain);
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347
348/*
b13267a5 349 * Common `cdev_t' stuff are declared here to avoid #include poisoning
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350 */
351
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352int major(cdev_t x);
353int minor(cdev_t x);
354udev_t dev2udev(cdev_t x);
355cdev_t udev2dev(udev_t x, int b);
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356int uminor(udev_t dev);
357int umajor(udev_t dev);
358udev_t makeudev(int x, int y);
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359
360#endif /* _KERNEL */
984263bc 361#endif /* !_SYS_SYSTM_H_ */