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 1.10 2003/07/23 02:30:24 dillon Exp $ 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 50 extern int securelevel; /* system security level (see init(8)) */ 51 52 extern int cold; /* nonzero if we are doing a cold boot */ 53 extern const char *panicstr; /* panic message */ 54 extern int dumping; /* system is dumping */ 55 extern int safepri; /* safe ipl when cold or panicing */ 56 extern char version[]; /* system version */ 57 extern char copyright[]; /* system copyright */ 58 59 extern int nswap; /* size of swap space */ 60 61 extern int selwait; /* select timeout address */ 62 63 extern u_char curpriority; /* priority of current process */ 64 65 extern int physmem; /* physical memory */ 66 67 extern dev_t dumpdev; /* dump device */ 68 extern long dumplo; /* offset into dumpdev */ 69 70 extern dev_t rootdev; /* root device */ 71 extern dev_t rootdevs[2]; /* possible root devices */ 72 extern char *rootdevnames[2]; /* names of possible root devices */ 73 extern struct vnode *rootvp; /* vnode equivalent to above */ 74 75 extern int boothowto; /* reboot flags, from console subsystem */ 76 extern int bootverbose; /* nonzero to print verbose messages */ 77 78 extern int maxusers; /* system tune hint */ 79 80 extern int ncpus; /* total number of cpus (real, hyper, virtual)*/ 81 82 #ifdef INVARIANTS /* The option is always available */ 83 #define KASSERT(exp,msg) do { if (!(exp)) panic msg; } while (0) 84 #define KKASSERT(exp) if (!(exp)) panic("assertion: " #exp " in " __FUNCTION__) 85 #define SPLASSERT(level, msg) __CONCAT(__CONCAT(spl,level),assert)(msg) 86 #define CONDSPLASSERT(cond, level, msg) do { \ 87 if (cond) \ 88 SPLASSERT(level, msg); \ 89 } while (0) 90 #else 91 #define KASSERT(exp,msg) 92 #define KKASSERT(exp) 93 #define SPLASSERT(level, msg) 94 #define CONDSPLASSERT(cond, level, msg) 95 #endif 96 97 /* 98 * General function declarations. 99 */ 100 101 struct clockframe; 102 struct malloc_type; 103 struct proc; 104 struct xwait; 105 struct timeval; 106 struct tty; 107 struct uio; 108 struct globaldata; 109 struct thread; 110 111 void Debugger __P((const char *msg)); 112 void mi_gdinit __P((struct globaldata *gd, int cpu)); 113 int dumpstatus __P((vm_offset_t addr, off_t count)); 114 int nullop __P((void)); 115 int eopnotsupp __P((void)); 116 int einval __P((void)); 117 int seltrue __P((dev_t dev, int which, struct thread *td)); 118 int ureadc __P((int, struct uio *)); 119 void *hashinit __P((int count, struct malloc_type *type, u_long *hashmask)); 120 void *phashinit __P((int count, struct malloc_type *type, u_long *nentries)); 121 122 void cpu_boot __P((int)); 123 void cpu_rootconf __P((void)); 124 extern uint32_t crc32_tab[]; 125 uint32_t crc32(const void *buf, size_t size); 126 void init_param1 __P((void)); 127 void init_param2 __P((int physpages)); 128 void tablefull __P((const char *)); 129 int addlog __P((const char *, ...)) __printflike(1, 2); 130 int kvprintf __P((char const *, void (*)(int, void*), void *, int, 131 _BSD_VA_LIST_)) __printflike(1, 0); 132 int log __P((int, const char *, ...)) __printflike(2, 3); 133 void logwakeup __P((void)); 134 void log_console __P((struct uio *)); 135 int printf __P((const char *, ...)) __printflike(1, 2); 136 int snprintf __P((char *, size_t, const char *, ...)) __printflike(3, 4); 137 int sprintf __P((char *buf, const char *, ...)) __printflike(2, 3); 138 int uprintf __P((const char *, ...)) __printflike(1, 2); 139 int vprintf __P((const char *, _BSD_VA_LIST_)) __printflike(1, 0); 140 int vsnprintf __P((char *, size_t, const char *, _BSD_VA_LIST_)) __printflike(3, 0); 141 int vsprintf __P((char *buf, const char *, _BSD_VA_LIST_)) __printflike(2, 0); 142 int ttyprintf __P((struct tty *, const char *, ...)) __printflike(2, 3); 143 int sscanf __P((const char *, char const *, ...)); 144 int vsscanf __P((const char *, char const *, _BSD_VA_LIST_)); 145 long strtol __P((const char *, char **, int)); 146 u_long strtoul __P((const char *, char **, int)); 147 quad_t strtoq __P((const char *, char **, int)); 148 u_quad_t strtouq __P((const char *, char **, int)); 149 150 /* 151 * note: some functions commonly used by device drivers may be passed 152 * pointers to volatile storage, volatile set to avoid warnings. 153 */ 154 void bcopy __P((volatile const void *from, volatile void *to, size_t len)); 155 void ovbcopy __P((const void *from, void *to, size_t len)); 156 157 #ifdef __i386__ 158 extern void (*bzero) __P((volatile void *buf, size_t len)); 159 #else 160 void bzero __P((void *buf, size_t len)); 161 #endif 162 163 void *memcpy __P((void *to, const void *from, size_t len)); 164 165 int copystr __P((const void *kfaddr, void *kdaddr, size_t len, 166 size_t *lencopied)); 167 int copyinstr __P((const void *udaddr, void *kaddr, size_t len, 168 size_t *lencopied)); 169 int copyin __P((const void *udaddr, void *kaddr, size_t len)); 170 int copyout __P((const void *kaddr, void *udaddr, size_t len)); 171 172 int fubyte __P((const void *base)); 173 int subyte __P((void *base, int byte)); 174 int suibyte __P((void *base, int byte)); 175 long fuword __P((const void *base)); 176 int suword __P((void *base, long word)); 177 int fusword __P((void *base)); 178 int susword __P((void *base, int word)); 179 180 void realitexpire __P((void *)); 181 182 void hardclock __P((struct clockframe *frame)); 183 void statclock __P((struct clockframe *frame)); 184 185 void startprofclock __P((struct proc *)); 186 void stopprofclock __P((struct proc *)); 187 void setstatclockrate __P((int hzrate)); 188 189 char *getenv __P((const char *name)); 190 #define testenv getenv 191 #define freeenv 192 int getenv_int __P((const char *name, int *data)); 193 int getenv_string __P((const char *name, char *data, int size)); 194 int getenv_quad __P((const char *name, quad_t *data)); 195 extern char *kern_envp; 196 197 #ifdef APM_FIXUP_CALLTODO 198 void adjust_timeout_calltodo __P((struct timeval *time_change)); 199 #endif /* APM_FIXUP_CALLTODO */ 200 201 #include <sys/libkern.h> 202 203 /* Initialize the world */ 204 void consinit __P((void)); 205 void cpu_initclocks __P((void)); 206 void nchinit __P((void)); 207 void usrinfoinit __P((void)); 208 void vntblinit __P((void)); 209 210 /* Finalize the world. */ 211 void shutdown_nice __P((int)); 212 213 /* 214 * Kernel to clock driver interface. 215 */ 216 void inittodr __P((time_t base)); 217 void resettodr __P((void)); 218 void startrtclock __P((void)); 219 220 /* Timeouts */ 221 typedef void timeout_t __P((void *)); /* timeout function type */ 222 #define CALLOUT_HANDLE_INITIALIZER(handle) \ 223 { NULL } 224 225 void callout_handle_init __P((struct callout_handle *)); 226 struct callout_handle timeout __P((timeout_t *, void *, int)); 227 void untimeout __P((timeout_t *, void *, struct callout_handle)); 228 229 /* Interrupt management */ 230 231 /* 232 * For the alpha arch, some of these functions are static __inline, and 233 * the others should be. 234 */ 235 #ifdef __i386__ 236 void setdelayed __P((void)); 237 void setsoftast __P((void)); 238 void setsoftcambio __P((void)); 239 void setsoftcamnet __P((void)); 240 void setsoftclock __P((void)); 241 void setsoftcrypto __P((void)); 242 void setsoftnet __P((void)); 243 void setsofttty __P((void)); 244 void setsoftvm __P((void)); 245 void setsofttq __P((void)); 246 void schedsoftcamnet __P((void)); 247 void schedsoftcambio __P((void)); 248 void schedsoftnet __P((void)); 249 void schedsofttty __P((void)); 250 void schedsoftvm __P((void)); 251 void schedsofttq __P((void)); 252 intrmask_t softclockpending __P((void)); 253 void spl0 __P((void)); 254 intrmask_t splbio __P((void)); 255 intrmask_t splcam __P((void)); 256 intrmask_t splclock __P((void)); 257 intrmask_t splcrypto __P((void)); 258 intrmask_t splhigh __P((void)); 259 intrmask_t splimp __P((void)); 260 intrmask_t splnet __P((void)); 261 intrmask_t splsoftcam __P((void)); 262 intrmask_t splsoftcambio __P((void)); 263 intrmask_t splsoftcamnet __P((void)); 264 intrmask_t splsoftclock __P((void)); 265 intrmask_t splsofttty __P((void)); 266 intrmask_t splsoftvm __P((void)); 267 intrmask_t splsofttq __P((void)); 268 intrmask_t splstatclock __P((void)); 269 intrmask_t spltty __P((void)); 270 intrmask_t splvm __P((void)); 271 void splx __P((intrmask_t ipl)); 272 void splz __P((void)); 273 #endif /* __i386__ */ 274 275 #ifdef __alpha__ 276 #include <machine/ipl.h> 277 #endif 278 279 #ifdef INVARIANT_SUPPORT 280 void splbioassert __P((const char *msg)); 281 void splcamassert __P((const char *msg)); 282 void splclockassert __P((const char *msg)); 283 void splcryptoassert __P((const char *msg)); 284 void splhighassert __P((const char *msg)); 285 void splimpassert __P((const char *msg)); 286 void splnetassert __P((const char *msg)); 287 void splsoftcamassert __P((const char *msg)); 288 void splsoftcambioassert __P((const char *msg)); 289 void splsoftcamnetassert __P((const char *msg)); 290 void splsoftclockassert __P((const char *msg)); 291 void splsoftttyassert __P((const char *msg)); 292 void splsoftvmassert __P((const char *msg)); 293 void splsofttqassert __P((const char *msg)); 294 void splstatclockassert __P((const char *msg)); 295 void splttyassert __P((const char *msg)); 296 void splvmassert __P((const char *msg)); 297 #endif /* INVARIANT_SUPPORT */ 298 299 /* 300 * XXX It's not clear how "machine independent" these will be yet, but 301 * they are used all over the place especially in pci drivers. We would 302 * have to modify lots of drivers since <machine/cpufunc.h> no longer 303 * implicitly causes these to be defined when it #included <machine/spl.h> 304 */ 305 extern intrmask_t bio_imask; /* group of interrupts masked with splbio() */ 306 extern intrmask_t cam_imask; /* group of interrupts masked with splcam() */ 307 extern intrmask_t net_imask; /* group of interrupts masked with splimp() */ 308 extern intrmask_t stat_imask; /* interrupts masked with splstatclock() */ 309 extern intrmask_t tty_imask; /* group of interrupts masked with spltty() */ 310 311 /* Read only */ 312 extern const intrmask_t soft_imask; /* interrupts masked with splsoft*() */ 313 extern const intrmask_t softnet_imask; /* interrupt masked with splnet() */ 314 extern const intrmask_t softtty_imask; /* interrupt masked with splsofttty() */ 315 316 /* 317 * Various callout lists. 318 */ 319 320 /* Exit callout list declarations. */ 321 typedef void (*exitlist_fn) __P((struct thread *td)); 322 323 int at_exit __P((exitlist_fn function)); 324 int rm_at_exit __P((exitlist_fn function)); 325 326 /* Fork callout list declarations. */ 327 typedef void (*forklist_fn) __P((struct proc *parent, struct proc *child, 328 int flags)); 329 330 int at_fork __P((forklist_fn function)); 331 int rm_at_fork __P((forklist_fn function)); 332 333 /* 334 * Not exactly a callout LIST, but a callout entry. 335 * Allow an external module to define a hardware watchdog tickler. 336 * Normally a process would do this, but there are times when the 337 * kernel needs to be able to hold off the watchdog, when the process 338 * is not active, e.g., when dumping core. 339 */ 340 typedef void (*watchdog_tickle_fn) __P((void)); 341 342 extern watchdog_tickle_fn wdog_tickler; 343 344 /* 345 * Common `proc' functions are declared here so that proc.h can be included 346 * less often. 347 */ 348 int tsleep __P((void *chan, int slpflags, const char *wmesg, int timo)); 349 void wakeup __P((void *chan)); 350 void wakeup_one __P((void *chan)); 351 352 /* 353 * Common `dev_t' stuff are declared here to avoid #include poisoning 354 */ 355 356 int major(dev_t x); 357 int minor(dev_t x); 358 dev_t makedev(int x, int y); 359 udev_t dev2udev(dev_t x); 360 dev_t udev2dev(udev_t x, int b); 361 int uminor(udev_t dev); 362 int umajor(udev_t dev); 363 udev_t makeudev(int x, int y); 364 #endif /* !_SYS_SYSTM_H_ */ 365