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 $ 40 * $DragonFly: src/sys/sys/systm.h,v 1.24 2004/10/12 19:20:48 dillon Exp $ 41 */ 42 43 #ifndef _SYS_SYSTM_H_ 44 #define _SYS_SYSTM_H_ 45 46 #ifndef _MACHINE_TYPES_H_ 47 #include <machine/types.h> 48 #endif 49 #ifndef _MACHINE_STDARG_H_ 50 #include <machine/stdarg.h> 51 #endif 52 #include <machine/atomic.h> 53 #include <machine/cpufunc.h> 54 #include <sys/callout.h> 55 56 extern int securelevel; /* system security level (see init(8)) */ 57 58 extern int cold; /* nonzero if we are doing a cold boot */ 59 extern const char *panicstr; /* panic message */ 60 extern int dumping; /* system is dumping */ 61 extern int safepri; /* safe ipl when cold or panicing */ 62 extern char version[]; /* system version */ 63 extern char copyright[]; /* system copyright */ 64 65 extern int nswap; /* size of swap space */ 66 67 extern int selwait; /* select timeout address */ 68 69 extern u_char curpriority; /* priority of current process */ 70 71 extern int physmem; /* physical memory */ 72 73 extern dev_t dumpdev; /* dump device */ 74 extern long dumplo; /* offset into dumpdev */ 75 76 extern dev_t rootdev; /* root device */ 77 extern dev_t rootdevs[2]; /* possible root devices */ 78 extern char *rootdevnames[2]; /* names of possible root devices */ 79 80 extern int boothowto; /* reboot flags, from console subsystem */ 81 extern int bootverbose; /* nonzero to print verbose messages */ 82 83 extern int maxusers; /* system tune hint */ 84 85 extern int ncpus; /* total number of cpus (real, hyper, virtual)*/ 86 extern int ncpus2; /* ncpus rounded down to power of 2 */ 87 extern int ncpus2_shift; /* log base 2 of ncpus2 */ 88 extern int ncpus2_mask; /* ncpus2 - 1 */ 89 extern int clocks_running; /* timing/timeout subsystem is operational */ 90 91 #ifdef INVARIANTS /* The option is always available */ 92 #define KASSERT(exp,msg) do { if (!(exp)) panic msg; } while (0) 93 #define KKASSERT(exp) if (!(exp)) panic("assertion: " #exp " in %s", __FUNCTION__) 94 #define SPLASSERT(level, msg) __CONCAT(__CONCAT(spl,level),assert)(msg) 95 #define CONDSPLASSERT(cond, level, msg) do { \ 96 if (cond) \ 97 SPLASSERT(level, msg); \ 98 } while (0) 99 #else 100 #define KASSERT(exp,msg) 101 #define KKASSERT(exp) 102 #define SPLASSERT(level, msg) 103 #define CONDSPLASSERT(cond, level, msg) 104 #endif 105 106 #define CTASSERT(x) _CTASSERT(x, __LINE__) 107 #define _CTASSERT(x, y) __CTASSERT(x, y) 108 #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1] 109 110 /* 111 * General function declarations. 112 */ 113 114 struct intrframe; 115 struct malloc_type; 116 struct proc; 117 struct xwait; 118 struct timeval; 119 struct tty; 120 struct uio; 121 struct globaldata; 122 struct thread; 123 124 void Debugger (const char *msg); 125 void backtrace(void); 126 void mi_gdinit (struct globaldata *gd, int cpu); 127 int dumpstatus (vm_offset_t addr, off_t count); 128 int nullop (void); 129 int eopnotsupp (void); 130 int einval (void); 131 int seltrue (dev_t dev, int which, struct thread *td); 132 int ureadc (int, struct uio *); 133 void *hashinit (int count, struct malloc_type *type, u_long *hashmask); 134 void *phashinit (int count, struct malloc_type *type, u_long *nentries); 135 136 void cpu_boot (int); 137 void cpu_rootconf (void); 138 extern uint32_t crc32_tab[]; 139 uint32_t crc32(const void *buf, size_t size); 140 void init_param1 (void); 141 void init_param2 (int physpages); 142 void tablefull (const char *); 143 int addlog (const char *, ...) __printflike(1, 2); 144 int kvprintf (char const *, void (*)(int, void*), void *, int, 145 __va_list) __printflike(1, 0); 146 int log (int, const char *, ...) __printflike(2, 3); 147 void logwakeup (void); 148 void log_console (struct uio *); 149 int printf (const char *, ...) __printflike(1, 2); 150 int snprintf (char *, size_t, const char *, ...) __printflike(3, 4); 151 int sprintf (char *buf, const char *, ...) __printflike(2, 3); 152 int uprintf (const char *, ...) __printflike(1, 2); 153 int vprintf (const char *, __va_list) __printflike(1, 0); 154 int vsnprintf (char *, size_t, const char *, __va_list) __printflike(3, 0); 155 int vsprintf (char *buf, const char *, __va_list) __printflike(2, 0); 156 int ttyprintf (struct tty *, const char *, ...) __printflike(2, 3); 157 int sscanf (const char *, char const *, ...); 158 int vsscanf (const char *, char const *, __va_list); 159 long strtol (const char *, char **, int); 160 u_long strtoul (const char *, char **, int); 161 quad_t strtoq (const char *, char **, int); 162 u_quad_t strtouq (const char *, char **, int); 163 164 /* 165 * note: some functions commonly used by device drivers may be passed 166 * pointers to volatile storage, volatile set to avoid warnings. 167 */ 168 void bcopy (volatile const void *from, volatile void *to, size_t len); 169 void ovbcopy (const void *from, void *to, size_t len); 170 171 #ifdef __i386__ 172 extern void (*bzero) (volatile void *buf, size_t len); 173 #else 174 void bzero (void *buf, size_t len); 175 #endif 176 177 void *memcpy (void *to, const void *from, size_t len); 178 179 int copystr (const void *kfaddr, void *kdaddr, size_t len, 180 size_t *lencopied); 181 int copyinstr (const void *udaddr, void *kaddr, size_t len, 182 size_t *lencopied); 183 int copyin (const void *udaddr, void *kaddr, size_t len); 184 int copyout (const void *kaddr, void *udaddr, size_t len); 185 186 int fubyte (const void *base); 187 int subyte (void *base, int byte); 188 int suibyte (void *base, int byte); 189 long fuword (const void *base); 190 int suword (void *base, long word); 191 int fusword (void *base); 192 int susword (void *base, int word); 193 194 void realitexpire (void *); 195 void DELAY(int usec); 196 197 void startprofclock (struct proc *); 198 void stopprofclock (struct proc *); 199 void setstatclockrate (int hzrate); 200 201 char *getenv (const char *name); 202 #define testenv getenv 203 #define freeenv(p) 204 int getenv_int (const char *name, int *data); 205 int getenv_string (const char *name, char *data, int size); 206 int getenv_quad (const char *name, quad_t *data); 207 extern char *kern_envp; 208 209 #ifdef APM_FIXUP_CALLTODO 210 void adjust_timeout_calltodo (struct timeval *time_change); 211 #endif /* APM_FIXUP_CALLTODO */ 212 213 #include <sys/libkern.h> 214 215 /* Initialize the world */ 216 void consinit (void); 217 void cpu_initclocks (void); 218 void nchinit (void); 219 void usrinfoinit (void); 220 221 /* Finalize the world. */ 222 void shutdown_nice (int); 223 224 /* 225 * Kernel to clock driver interface. 226 */ 227 void inittodr (time_t base); 228 void resettodr (void); 229 void startrtclock (void); 230 231 /* Timeouts */ 232 typedef void timeout_t (void *); /* timeout function type */ 233 #define CALLOUT_HANDLE_INITIALIZER(handle) \ 234 { NULL } 235 236 #if 0 237 /* OBSOLETE INTERFACE */ 238 void callout_handle_init (struct callout_handle *); 239 struct callout_handle timeout (timeout_t *, void *, int); 240 void untimeout (timeout_t *, void *, struct callout_handle); 241 #endif 242 243 /* Interrupt management */ 244 245 /* 246 * For the alpha arch, some of these functions are static __inline, and 247 * the others should be. 248 */ 249 #ifdef __i386__ 250 void setdelayed (void); 251 void setsoftast (void); 252 void setsoftcambio (void); 253 void setsoftcamnet (void); 254 void setsoftclock (void); 255 void setsoftcrypto (void); 256 void setsoftnet (void); 257 void setsofttty (void); 258 void setsoftvm (void); 259 void setsofttq (void); 260 void schedsoftcamnet (void); 261 void schedsoftcambio (void); 262 void schedsoftnet (void); 263 void schedsofttty (void); 264 void schedsoftvm (void); 265 void schedsofttq (void); 266 intrmask_t softclockpending (void); 267 void spl0 (void); 268 intrmask_t splbio (void); 269 intrmask_t splcam (void); 270 intrmask_t splclock (void); 271 intrmask_t splcrypto (void); 272 intrmask_t splhigh (void); 273 intrmask_t splimp (void); 274 intrmask_t splnet (void); 275 intrmask_t splsoftcam (void); 276 intrmask_t splsoftcambio (void); 277 intrmask_t splsoftcamnet (void); 278 intrmask_t splsoftclock (void); 279 intrmask_t splsofttty (void); 280 intrmask_t splsoftvm (void); 281 intrmask_t splsofttq (void); 282 intrmask_t splstatclock (void); 283 intrmask_t spltty (void); 284 intrmask_t splvm (void); 285 void splx (intrmask_t ipl); 286 void splz (void); 287 #endif /* __i386__ */ 288 289 #ifdef __alpha__ 290 #include <machine/ipl.h> 291 #endif 292 293 #ifdef INVARIANT_SUPPORT 294 void splbioassert (const char *msg); 295 void splcamassert (const char *msg); 296 void splclockassert (const char *msg); 297 void splcryptoassert (const char *msg); 298 void splhighassert (const char *msg); 299 void splimpassert (const char *msg); 300 void splnetassert (const char *msg); 301 void splsoftcamassert (const char *msg); 302 void splsoftcambioassert (const char *msg); 303 void splsoftcamnetassert (const char *msg); 304 void splsoftclockassert (const char *msg); 305 void splsoftttyassert (const char *msg); 306 void splsoftvmassert (const char *msg); 307 void splsofttqassert (const char *msg); 308 void splstatclockassert (const char *msg); 309 void splttyassert (const char *msg); 310 void splvmassert (const char *msg); 311 #endif /* INVARIANT_SUPPORT */ 312 313 /* 314 * XXX It's not clear how "machine independent" these will be yet, but 315 * they are used all over the place especially in pci drivers. We would 316 * have to modify lots of drivers since <machine/cpufunc.h> no longer 317 * implicitly causes these to be defined when it #included <machine/spl.h> 318 */ 319 extern intrmask_t bio_imask; /* group of interrupts masked with splbio() */ 320 extern intrmask_t cam_imask; /* group of interrupts masked with splcam() */ 321 extern intrmask_t net_imask; /* group of interrupts masked with splimp() */ 322 extern intrmask_t stat_imask; /* interrupts masked with splstatclock() */ 323 extern intrmask_t tty_imask; /* group of interrupts masked with spltty() */ 324 325 /* Read only */ 326 extern const intrmask_t soft_imask; /* interrupts masked with splsoft*() */ 327 extern const intrmask_t softnet_imask; /* interrupt masked with splnet() */ 328 extern const intrmask_t softtty_imask; /* interrupt masked with splsofttty() */ 329 330 /* 331 * Various callout lists. 332 */ 333 334 /* Exit callout list declarations. */ 335 typedef void (*exitlist_fn) (struct thread *td); 336 337 int at_exit (exitlist_fn function); 338 int rm_at_exit (exitlist_fn function); 339 340 /* Fork callout list declarations. */ 341 typedef void (*forklist_fn) (struct proc *parent, struct proc *child, 342 int flags); 343 344 int at_fork (forklist_fn function); 345 int rm_at_fork (forklist_fn function); 346 347 /* 348 * Not exactly a callout LIST, but a callout entry. 349 * Allow an external module to define a hardware watchdog tickler. 350 * Normally a process would do this, but there are times when the 351 * kernel needs to be able to hold off the watchdog, when the process 352 * is not active, e.g., when dumping core. 353 */ 354 typedef void (*watchdog_tickle_fn) (void); 355 356 extern watchdog_tickle_fn wdog_tickler; 357 358 /* 359 * Common `proc' functions are declared here so that proc.h can be included 360 * less often. 361 */ 362 int tsleep (void *chan, int slpflags, const char *wmesg, int timo); 363 void wakeup (void *chan); 364 void wakeup_one (void *chan); 365 366 /* 367 * Common `dev_t' stuff are declared here to avoid #include poisoning 368 */ 369 370 int major(dev_t x); 371 int minor(dev_t x); 372 udev_t dev2udev(dev_t x); 373 dev_t udev2dev(udev_t x, int b); 374 int uminor(udev_t dev); 375 int umajor(udev_t dev); 376 udev_t makeudev(int x, int y); 377 #endif /* !_SYS_SYSTM_H_ */ 378