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 1.81 2008/09/11 00:35:49 dillon Exp $ 41 */ 42 43 #ifndef _SYS_SYSTM_H_ 44 #define _SYS_SYSTM_H_ 45 46 #ifndef _KERNEL 47 #error "This file should not be included by userland programs." 48 #else 49 50 #ifndef _MACHINE_TYPES_H_ 51 #include <machine/types.h> 52 #endif 53 #ifndef _MACHINE_STDARG_H_ 54 #include <machine/stdarg.h> 55 #endif 56 #include <machine/atomic.h> 57 #include <machine/cpufunc.h> 58 #include <sys/callout.h> 59 60 extern int securelevel; /* system security level (see init(8)) */ 61 extern int kernel_mem_readonly; /* disable writes to kernel memory */ 62 63 extern int cold; /* nonzero if we are doing a cold boot */ 64 extern int tsleep_now_works; /* tsleep won't just return any more */ 65 extern const char *panicstr; /* panic message */ 66 extern int dumping; /* system is dumping */ 67 extern int safepri; /* safe ipl when cold or panicing */ 68 extern char version[]; /* system version */ 69 extern char copyright[]; /* system copyright */ 70 71 extern int selwait; /* select timeout address */ 72 73 extern u_char curpriority; /* priority of current process */ 74 75 extern int physmem; /* physical memory */ 76 77 extern cdev_t dumpdev; /* dump device */ 78 extern u_int64_t dumplo64; /* block number into dumpdev, start of dump */ 79 80 extern cdev_t rootdev; /* root device */ 81 extern cdev_t rootdevs[2]; /* possible root devices */ 82 extern char *rootdevnames[2]; /* names of possible root devices */ 83 extern char *ZeroPage; 84 85 extern int boothowto; /* reboot flags, from console subsystem */ 86 extern int bootverbose; /* nonzero to print verbose messages */ 87 88 extern int maxusers; /* system tune hint */ 89 90 extern int ncpus; /* total number of cpus (real, hyper, virtual)*/ 91 extern int ncpus2; /* ncpus rounded down to power of 2 */ 92 extern int ncpus2_shift; /* log base 2 of ncpus2 */ 93 extern int ncpus2_mask; /* ncpus2 - 1 */ 94 extern int ncpus_fit; /* round up to a power of 2 */ 95 extern int ncpus_fit_mask; /* ncpus_fit - 1 */ 96 extern int clocks_running; /* timing/timeout subsystem is operational */ 97 98 /* XXX TGEN these don't belong here, they're MD on i386/x86_64 */ 99 extern u_int cpu_feature; /* CPUID_* features */ 100 extern u_int cpu_feature2; /* CPUID2_* features */ 101 102 extern int nfs_diskless_valid; /* NFS diskless params were obtained */ 103 extern vm_paddr_t Maxmem; /* Highest physical memory address in system */ 104 105 #ifdef INVARIANTS /* The option is always available */ 106 #define KASSERT(exp,msg) do { if (__predict_false(!(exp))) \ 107 panic msg; } while (0) 108 #define KKASSERT(exp) do { if (__predict_false(!(exp))) \ 109 panic("assertion: %s in %s", \ 110 #exp, __func__); } while (0) 111 #define __debugvar 112 #else 113 #define KASSERT(exp,msg) 114 #define KKASSERT(exp) 115 #define __debugvar __attribute__((__unused__)) 116 #endif 117 118 #define CTASSERT(x) _CTASSERT(x, __LINE__) 119 #define _CTASSERT(x, y) __CTASSERT(x, y) 120 #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1] 121 122 /* 123 * General function declarations. 124 */ 125 126 struct intrframe; 127 struct spinlock; 128 struct lock; 129 struct mtx; 130 struct lwkt_serialize; 131 struct malloc_type; 132 struct proc; 133 struct xwait; 134 struct timeval; 135 struct tty; 136 struct uio; 137 struct globaldata; 138 struct thread; 139 struct trapframe; 140 struct user; 141 struct vmspace; 142 struct savetls; 143 struct krate; 144 145 void Debugger (const char *msg); 146 void print_backtrace(int count); 147 void mi_gdinit (struct globaldata *gd, int cpu); 148 void mi_proc0init(struct globaldata *gd, struct user *proc0paddr); 149 int nullop (void); 150 int seltrue (cdev_t dev, int which); 151 int ureadc (int, struct uio *); 152 void *hashinit (int count, struct malloc_type *type, u_long *hashmask); 153 void *phashinit (int count, struct malloc_type *type, u_long *nentries); 154 void *hashinit_ext (int count, size_t size, 155 struct malloc_type *type, u_long *hashmask); 156 void *phashinit_ext (int count, size_t size, 157 struct malloc_type *type, u_long *nentries); 158 159 int cpu_sanitize_frame (struct trapframe *); 160 int cpu_sanitize_tls (struct savetls *); 161 void cpu_spinlock_contested(void); 162 void cpu_halt (void); 163 void cpu_reset (void); 164 void cpu_boot (int); 165 void cpu_rootconf (void); 166 void cpu_vmspace_alloc(struct vmspace *); 167 void cpu_vmspace_free(struct vmspace *); 168 void cpu_vkernel_trap(struct trapframe *, int); 169 void set_user_TLS(void); 170 void set_vkernel_fp(struct trapframe *); 171 int kvm_access_check(vm_offset_t, vm_offset_t, int); 172 173 vm_paddr_t kvtop(void *addr); 174 int is_physical_memory (vm_offset_t addr); 175 176 extern uint32_t crc32_tab[]; 177 uint32_t crc32(const void *buf, size_t size); 178 uint32_t crc32_ext(const void *buf, size_t size, uint32_t ocrc); 179 void init_param1 (void); 180 void init_param2 (int physpages); 181 void tablefull (const char *); 182 int kvcprintf (char const *, void (*)(int, void*), void *, int, 183 __va_list) __printflike(1, 0); 184 void kvcreinitspin(void); 185 int log (int, const char *, ...) __printflike(2, 3); 186 void logwakeup (void); 187 void log_console (struct uio *); 188 int kprintf (const char *, ...) __printflike(1, 2); 189 int kprintf0(const char *, ...) __printflike(1, 2); 190 void krateprintf (struct krate *, const char *, ...) __printflike(2, 3); 191 int ksnprintf (char *, size_t, const char *, ...) __printflike(3, 4); 192 int ksnrprintf (char *, size_t, int, const char *, ...) __printflike(4, 5); 193 int ksprintf (char *buf, const char *, ...) __printflike(2, 3); 194 int uprintf (const char *, ...) __printflike(1, 2); 195 int kvprintf (const char *, __va_list) __printflike(1, 0); 196 int kvsnprintf (char *, size_t, const char *, 197 __va_list) __printflike(3, 0); 198 int kvsnrprintf (char *, size_t, int, const char *, 199 __va_list) __printflike(4, 0); 200 int kvasnrprintf (char **, size_t, int, const char *, 201 __va_list) __printflike(4, 0); 202 int kvsprintf (char *buf, const char *, 203 __va_list) __printflike(2, 0); 204 int ttyprintf (struct tty *, const char *, ...) __printflike(2, 3); 205 int ksscanf (const char *, char const *, ...) __scanflike(2, 3); 206 int kvsscanf (const char *, char const *, __va_list) __scanflike(2, 0); 207 void kvasfree(char **); 208 209 long strtol (const char *, char **, int); 210 u_long strtoul (const char *, char **, int); 211 quad_t strtoq (const char *, char **, int); 212 u_quad_t strtouq (const char *, char **, int); 213 214 /* 215 * note: some functions commonly used by device drivers may be passed 216 * pointers to volatile storage, volatile set to avoid warnings. 217 * 218 * NOTE: bcopyb() - is a dumb byte-granular bcopy. This routine is 219 * explicitly not meant to be sophisticated. 220 * NOTE: bcopyi() - is a dumb int-granular bcopy (len is still in bytes). 221 * This routine is explicitly not meant to be sophisticated. 222 */ 223 void bcopyb (const void *from, void *to, size_t len); 224 void bcopyi (const void *from, void *to, size_t len); 225 void bcopy (volatile const void *from, volatile void *to, size_t len); 226 void ovbcopy (const void *from, void *to, size_t len); 227 void bzero (volatile void *buf, size_t len); 228 void bzeront (volatile void *buf, size_t len); 229 void *memcpy (void *to, const void *from, size_t len); 230 231 int copystr (const void *kfaddr, void *kdaddr, size_t len, 232 size_t *lencopied); 233 int copyinstr (const void *udaddr, void *kaddr, size_t len, 234 size_t *lencopied); 235 int copyin (const void *udaddr, void *kaddr, size_t len); 236 int copyout (const void *kaddr, void *udaddr, size_t len); 237 238 int fubyte (const void *base); 239 int subyte (void *base, int byte); 240 long fuword (const void *base); 241 int suword (void *base, long word); 242 int fusword (void *base); 243 int susword (void *base, int word); 244 u_long casuword(volatile u_long *p, u_long oldval, u_long newval); 245 246 void realitexpire (void *); 247 void DELAY(int usec); 248 void DRIVERSLEEP(int usec); 249 250 void startprofclock (struct proc *); 251 void stopprofclock (struct proc *); 252 void setstatclockrate (int hzrate); 253 254 /* 255 * Kernel environment support functions and sundry. 256 */ 257 char *kgetenv (const char *name); 258 int ksetenv(const char *name, const char *value); 259 int kunsetenv(const char *name); 260 void kfreeenv(char *env); 261 int ktestenv(const char *name); 262 int kgetenv_int (const char *name, int *data); 263 int kgetenv_string (const char *name, char *data, int size); 264 int kgetenv_ulong(const char *name, unsigned long *data); 265 int kgetenv_quad (const char *name, quad_t *data); 266 int kgetenv_long(const char *name, long *data); 267 extern char *kern_envp; 268 269 #ifdef APM_FIXUP_CALLTODO 270 void adjust_timeout_calltodo (struct timeval *time_change); 271 #endif /* APM_FIXUP_CALLTODO */ 272 273 #include <sys/libkern.h> 274 275 /* Initialize the world */ 276 void mi_startup (void); 277 void nchinit (void); 278 279 /* Finalize the world. */ 280 void shutdown_nice (int); 281 282 /* 283 * Kernel to clock driver interface. 284 */ 285 void inittodr (time_t base); 286 void resettodr (void); 287 void startrtclock (void); 288 289 /* Timeouts */ 290 typedef void timeout_t (void *); /* timeout function type */ 291 292 /* Interrupt management */ 293 294 /* 295 * For the alpha arch, some of these functions are static __inline, and 296 * the others should be. 297 */ 298 #if defined(__i386__) || defined(__x86_64__) 299 void setdelayed (void); 300 void setsoftcambio (void); 301 void setsoftcamnet (void); 302 void setsoftunused02 (void); 303 void setsoftcrypto (void); 304 void setsoftunused01 (void); 305 void setsofttty (void); 306 void setsoftvm (void); 307 void setsofttq (void); 308 void schedsofttty (void); 309 void splz (void); 310 void splz_check (void); 311 #endif /* __i386__ */ 312 313 /* 314 * Various callout lists. 315 */ 316 317 /* Exit callout list declarations. */ 318 typedef void (*exitlist_fn) (struct thread *td); 319 320 int at_exit (exitlist_fn function); 321 int rm_at_exit (exitlist_fn function); 322 323 /* Fork callout list declarations. */ 324 typedef void (*forklist_fn) (struct proc *parent, struct proc *child, 325 int flags); 326 327 int at_fork (forklist_fn function); 328 int rm_at_fork (forklist_fn function); 329 330 /* 331 * Not exactly a callout LIST, but a callout entry. 332 * Allow an external module to define a hardware watchdog tickler. 333 * Normally a process would do this, but there are times when the 334 * kernel needs to be able to hold off the watchdog, when the process 335 * is not active, e.g., when dumping core. 336 */ 337 typedef void (*watchdog_tickle_fn) (void); 338 339 extern watchdog_tickle_fn wdog_tickler; 340 extern struct globaldata *panic_cpu_gd; 341 342 /* 343 * Common `proc' functions are declared here so that proc.h can be included 344 * less often. 345 */ 346 int tsleep (const volatile void *, int, const char *, int); 347 int ssleep (const volatile void *, struct spinlock *, int, const char *, int); 348 int lksleep (const volatile void *, struct lock *, int, const char *, int); 349 int mtxsleep (const volatile void *, struct mtx *, int, const char *, int); 350 int zsleep(const volatile void *, struct lwkt_serialize *, int, const char *, int); 351 void tsleep_interlock (const volatile void *, int); 352 void tsleep_remove (struct thread *); 353 int lwkt_sleep (const char *, int); 354 void tstop (void); 355 void wakeup (const volatile void *chan); 356 void wakeup_one (const volatile void *chan); 357 void wakeup_mycpu (const volatile void *chan); 358 void wakeup_mycpu_one (const volatile void *chan); 359 void wakeup_oncpu (struct globaldata *gd, const volatile void *chan); 360 void wakeup_oncpu_one (struct globaldata *gd, const volatile void *chan); 361 void wakeup_domain (const volatile void *chan, int domain); 362 void wakeup_domain_one (const volatile void *chan, int domain); 363 364 /* 365 * Common `cdev_t' stuff are declared here to avoid #include poisoning 366 */ 367 368 int major(cdev_t x); 369 int minor(cdev_t x); 370 udev_t dev2udev(cdev_t x); 371 cdev_t udev2dev(udev_t x, int b); 372 int uminor(udev_t dev); 373 int umajor(udev_t dev); 374 udev_t makeudev(int x, int y); 375 376 #endif /* _KERNEL */ 377 #endif /* !_SYS_SYSTM_H_ */ 378