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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)systm.h 8.7 (Berkeley) 3/29/95 35 * $FreeBSD: src/sys/sys/systm.h,v 1.111.2.18 2002/12/17 18:04:02 sam Exp $ 36 */ 37 38 #ifndef _SYS_SYSTM_H_ 39 #define _SYS_SYSTM_H_ 40 41 #ifndef _KERNEL 42 #error "This file should not be included by userland programs." 43 #else 44 45 #ifndef _MACHINE_TYPES_H_ 46 #include <machine/types.h> 47 #endif 48 #include <machine/stdarg.h> 49 #include <machine/atomic.h> 50 #include <machine/cpufunc.h> 51 #include <sys/callout.h> 52 53 extern int securelevel; /* system security level (see init(8)) */ 54 extern int kernel_mem_readonly; /* disable writes to kernel memory */ 55 56 extern int cold; /* nonzero if we are doing a cold boot */ 57 extern int tsleep_now_works; /* tsleep won't just return any more */ 58 extern const char *panicstr; /* panic message */ 59 extern int dumping; /* system is dumping */ 60 extern int safepri; /* safe ipl when cold or panicing */ 61 extern int osreldate; /* System release date */ 62 extern char version[]; /* system version */ 63 extern char copyright[]; /* system copyright */ 64 65 extern int selwait; /* select timeout address */ 66 67 extern u_char curpriority; /* priority of current process */ 68 extern int cpu_mwait_spin; /* typically set in machdep, used by lwkt */ 69 70 extern long physmem; /* physical memory */ 71 72 extern cdev_t dumpdev; /* dump device */ 73 extern u_int64_t dumplo64; /* block number into dumpdev, start of dump */ 74 75 extern cdev_t rootdev; /* root device */ 76 extern cdev_t rootdevs[2]; /* possible root devices */ 77 extern char *rootdevnames[2]; /* names of possible root devices */ 78 extern char *ZeroPage; 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 ncpus_fit; /* round up to a power of 2 */ 87 extern int ncpus_fit_mask; /* ncpus_fit - 1 */ 88 extern int clocks_running; /* timing/timeout subsystem is operational */ 89 90 /* XXX TGEN these don't belong here, they're MD on pc64 */ 91 extern u_int cpu_feature; /* CPUID_* features */ 92 extern u_int cpu_feature2; /* CPUID2_* features */ 93 extern u_int cpu_mi_feature; /* CPU_MI_XXX machine-nonspecific features */ 94 extern cpumask_t usched_global_cpumask; 95 96 extern int nfs_diskless_valid; /* NFS diskless params were obtained */ 97 extern vm_paddr_t Maxmem; /* Highest physical memory address in system */ 98 99 #ifdef INVARIANTS /* The option is always available */ 100 #define KASSERT(exp,msg) do { if (__predict_false(!(exp))) \ 101 panic msg; } while (0) 102 #define KKASSERT(exp) do { if (__predict_false(!(exp))) \ 103 panic("assertion \"%s\" failed " \ 104 "in %s at %s:%u", #exp, __func__, \ 105 __FILE__, __LINE__); } while (0) 106 #define __debugvar 107 #else 108 #define KASSERT(exp,msg) do { } while (0) 109 #define KKASSERT(exp) do { } while (0) 110 #define __debugvar __attribute__((__unused__)) 111 #endif 112 113 /* 114 * General function declarations. 115 */ 116 117 struct intrframe; 118 struct spinlock; 119 struct lock; 120 struct mtx; 121 struct lwkt_serialize; 122 struct malloc_type; 123 struct proc; 124 struct timeval; 125 struct tty; 126 struct uio; 127 struct globaldata; 128 struct thread; 129 struct trapframe; 130 struct user; 131 struct vmspace; 132 struct savetls; 133 struct krate; 134 struct _jmp_buf; 135 136 void Debugger (const char *msg); 137 void print_backtrace(int count); 138 void mi_gdinit (struct globaldata *gd, int cpu); 139 void slab_gdinit (struct globaldata *gd); 140 void mi_proc0init(struct globaldata *gd, struct user *proc0paddr); 141 int setjmp(struct _jmp_buf *) __returns_twice; 142 void longjmp(struct _jmp_buf *, int) __dead2; 143 int nullop (void); 144 int seltrue (cdev_t dev, int which); 145 int ureadc (int, struct uio *); 146 void *hashinit (int count, struct malloc_type *type, u_long *hashmask); 147 void hashdestroy(void *vhashtbl, struct malloc_type *type, u_long hashmask); 148 void *phashinit (int count, struct malloc_type *type, u_long *nentries); 149 void *hashinit_ext (int count, size_t size, 150 struct malloc_type *type, u_long *hashmask); 151 void *phashinit_ext (int count, size_t size, 152 struct malloc_type *type, u_long *nentries); 153 154 int cpu_sanitize_frame (struct trapframe *); 155 int cpu_sanitize_tls (struct savetls *); 156 void cpu_spinlock_contested(void); 157 void cpu_halt (void) __dead2; 158 void cpu_idle_halt (void); 159 void cpu_reset (void); 160 void cpu_boot (int); 161 void cpu_rootconf (void); 162 void cpu_vmspace_alloc(struct vmspace *); 163 void cpu_vmspace_free(struct vmspace *); 164 void cpu_vkernel_trap(struct trapframe *, int); 165 enum vmm_guest_type detect_virtual(void); 166 void set_user_TLS(void); 167 void set_vkernel_fp(struct trapframe *); 168 int kvm_access_check(vm_offset_t, vm_offset_t, int); 169 170 vm_paddr_t kvtop(void *addr); 171 172 /* 173 * Old CRC32 API 174 */ 175 extern const uint32_t crc32_tab[]; 176 uint32_t crc32(const void *buf, size_t size); 177 uint32_t crc32_ext(const void *buf, size_t size, uint32_t ocrc); 178 179 /* 180 * Newer (fast) iscsi CRC32 APIs. 181 * 182 * NOTE: iscsi_crc32_ext() inverts ocrc input and output as expected, 183 * pass a seed of 0 for the equivalent of iscsi_crc32(). 184 * 185 * calculate_crc32c() does not invert crc32c input and output 186 * to maintain FreeBSD API compatibility. 187 */ 188 uint32_t iscsi_crc32(const void *buf, size_t size); 189 uint32_t iscsi_crc32_ext(const void *buf, size_t size, uint32_t ocrc); 190 uint32_t calculate_crc32c(uint32_t crc32c, const unsigned char *buffer, 191 unsigned int length); 192 193 void init_param1 (void); 194 void init_param2 (int physpages); 195 void tablefull (const char *); 196 int kvcprintf (char const *, void (*)(int, void*), void *, 197 __va_list) __printf0like(1, 0); 198 void kvcreinitspin(void); 199 int log (int, const char *, ...) __printflike(2, 3); 200 void logwakeup (void); 201 void log_console (struct uio *); 202 int kprintf (const char *, ...) __printflike(1, 2); 203 void kprintf0 (const char *, ...) __printflike(1, 2); 204 void krateprintf (struct krate *, const char *, ...) __printflike(2, 3); 205 int ksnprintf (char *, size_t, const char *, ...) __printflike(3, 4); 206 int ksprintf (char *buf, const char *, ...) __printflike(2, 3); 207 int uprintf (const char *, ...) __printflike(1, 2); 208 int kvprintf (const char *, __va_list) __printflike(1, 0); 209 int kvsnprintf (char *, size_t, const char *, 210 __va_list) __printflike(3, 0); 211 int kvasnprintf (char **, size_t, const char *, 212 __va_list) __printflike(3, 0); 213 int kvsprintf (char *buf, const char *, 214 __va_list) __printflike(2, 0); 215 int ttyprintf (struct tty *, const char *, ...) __printflike(2, 3); 216 void hexdump (const void *ptr, int length, const char *hdr, int flags); 217 void kprint_cpuset(cpumask_t *mask); 218 #define HD_COLUMN_MASK 0xff 219 #define HD_DELIM_MASK 0xff00 220 #define HD_OMIT_COUNT (1 << 16) 221 #define HD_OMIT_HEX (1 << 17) 222 #define HD_OMIT_CHARS (1 << 18) 223 int ksscanf(const char *, char const *, ...) 224 __nonnull(1, 2) __scanflike(2, 3); 225 int kvsscanf(const char *, char const *, __va_list) 226 __nonnull(1, 2) __scanflike(2, 0); 227 void kvasfree(char **); 228 229 long strtol(const char *, char **, int) __nonnull(1); 230 u_long strtoul(const char *, char **, int) __nonnull(1); 231 quad_t strtoq(const char *, char **, int) __nonnull(1); 232 u_quad_t strtouq(const char *, char **, int) __nonnull(1); 233 234 /* 235 * note: some functions commonly used by device drivers may be passed 236 * pointers to volatile storage, volatile set to avoid warnings. 237 */ 238 void bcopy(volatile const void *from, volatile void *to, size_t len) 239 __nonnull(1, 2); 240 void bzero(volatile void *buf, size_t len) __nonnull(1); 241 void bzeront(volatile void *buf, size_t len) __nonnull(1); 242 void *memcpy(void *to, const void *from, size_t len) 243 __nonnull(1, 2); 244 245 long kreadmem64(const void *addr); 246 247 int copystr (const void *kfaddr, void *kdaddr, size_t len, 248 size_t *lencopied) __nonnull(1, 2); 249 int copyinstr (const void *udaddr, void *kaddr, size_t len, 250 size_t *lencopied) __nonnull(1, 2); 251 int copyin(const void *udaddr, void *kaddr, size_t len) __nonnull(1, 2); 252 int copyin_nofault(const void *udaddr, void *kaddr, size_t len) 253 __nonnull(1, 2); 254 int copyout(const void *kaddr, void *udaddr, size_t len) __nonnull(1, 2); 255 int copyout_nofault(const void *kaddr, void *udaddr, size_t len) 256 __nonnull(1, 2); 257 258 int fubyte (const uint8_t *base); 259 int subyte (uint8_t *base, uint8_t byte); 260 int32_t fuword32 (const uint32_t *base); 261 int64_t fuword64 (const uint64_t *base); 262 int suword32 (uint32_t *base, int word); 263 int suword64 (uint64_t *base, uint64_t word); 264 uint32_t casu32(volatile uint32_t *p, uint32_t oldval, uint32_t newval); 265 uint64_t casu64(volatile uint64_t *p, uint64_t oldval, uint64_t newval); 266 uint32_t swapu32(volatile uint32_t *p, uint32_t val); 267 uint64_t swapu64(volatile uint64_t *p, uint64_t val); 268 269 void DELAY(int usec); 270 void DRIVERSLEEP(int usec); 271 272 void startprofclock (struct proc *); 273 void stopprofclock (struct proc *); 274 void setstatclockrate (int hzrate); 275 276 /* 277 * Kernel environment support functions and sundry. 278 */ 279 char *kgetenv (const char *name); 280 int ksetenv(const char *name, const char *value); 281 int kunsetenv(const char *name); 282 void kfreeenv(char *env); 283 int ktestenv(const char *name); 284 int kgetenv_int (const char *name, int *data); 285 int kgetenv_string (const char *name, char *data, int size); 286 int kgetenv_ulong(const char *name, unsigned long *data); 287 int kgetenv_quad (const char *name, quad_t *data); 288 int kgetenv_long(const char *name, long *data); 289 extern char *kern_envp; 290 291 #include <sys/libkern.h> 292 293 /* Initialize the world */ 294 void mi_startup (void); 295 void nchinit (void); 296 297 /* Finalize the world. */ 298 void shutdown_nice (int); 299 300 /* 301 * Kernel to clock driver interface. 302 */ 303 void inittodr (time_t base); 304 void resettodr (void); 305 void startrtclock (void); 306 307 /* Timeouts */ 308 typedef void timeout_t (void *); /* timeout function type */ 309 310 /* Interrupt management */ 311 312 /* 313 * For the alpha arch, some of these functions are static __inline, and 314 * the others should be. 315 */ 316 #if defined(__x86_64__) 317 void setdelayed (void); 318 void setsoftcambio (void); 319 void setsoftcamnet (void); 320 void setsoftunused02 (void); 321 void setsoftcrypto (void); 322 void setsoftunused01 (void); 323 void setsofttty (void); 324 void setsoftvm (void); 325 void setsofttq (void); 326 void schedsofttty (void); 327 void splz (void); 328 void splz_check (void); 329 void cpu_mmw_pause_int(int*, int, int, int); 330 void cpu_mmw_pause_long(long*, long, int, int); 331 void cpu_smp_stopped(void); 332 #endif /* __x86_64__ */ 333 334 /* 335 * Various callout lists. 336 */ 337 338 /* Exit callout list declarations. */ 339 typedef void (*exitlist_fn) (struct thread *td); 340 341 int at_exit (exitlist_fn function); 342 int rm_at_exit (exitlist_fn function); 343 344 /* Fork callout list declarations. */ 345 typedef void (*forklist_fn) (struct proc *parent, struct proc *child, 346 int flags); 347 348 int at_fork (forklist_fn function); 349 int rm_at_fork (forklist_fn function); 350 351 extern struct globaldata *panic_cpu_gd; 352 353 /* 354 * Common `proc' functions are declared here so that proc.h can be included 355 * less often. 356 */ 357 int tsleep(const volatile void *, int, const char *, int); 358 int ssleep(const volatile void *, struct spinlock *, int, const char *, int) 359 __nonnull(1); 360 int lksleep(const volatile void *, struct lock *, int, const char *, int) 361 __nonnull(1); 362 int mtxsleep(const volatile void *, struct mtx *, int, const char *, int) 363 __nonnull(1); 364 int zsleep(const volatile void *, struct lwkt_serialize *, int, const char *, int) 365 __nonnull(1); 366 void tsleep_interlock(const volatile void *, int) __nonnull(1); 367 void tsleep_remove (struct thread *); 368 int lwkt_sleep (const char *, int); 369 void tstop (void); 370 void wakeup(const volatile void *chan) __nonnull(1); 371 void wakeup_one(const volatile void *chan) __nonnull(1); 372 void wakeup_mycpu(const volatile void *chan) __nonnull(1); 373 void wakeup_mycpu_one(const volatile void *chan) __nonnull(1); 374 void wakeup_oncpu(struct globaldata *gd, const volatile void *chan) 375 __nonnull(2); 376 void wakeup_oncpu_one(struct globaldata *gd, const volatile void *chan) 377 __nonnull(2); 378 void wakeup_domain(const volatile void *chan, int domain) __nonnull(1); 379 void wakeup_domain_one(const volatile void *chan, int domain) __nonnull(1); 380 void wakeup_start_delayed(void); 381 void wakeup_end_delayed(void); 382 383 /* 384 * Common `cdev_t' stuff are declared here to avoid #include poisoning 385 */ 386 387 int major(cdev_t x); 388 int minor(cdev_t x); 389 udev_t dev2udev(cdev_t x); 390 cdev_t udev2dev(udev_t x, int b); 391 int uminor(udev_t dev); 392 int umajor(udev_t dev); 393 udev_t makeudev(int x, int y); 394 395 /* 396 * Unit number allocation API. (kern/subr_unit.c) 397 */ 398 struct unrhdr; 399 struct unrhdr *new_unrhdr(int low, int high, struct lock *lock); 400 void delete_unrhdr(struct unrhdr *uh); 401 int alloc_unr(struct unrhdr *uh); 402 int alloc_unrl(struct unrhdr *uh); 403 void free_unr(struct unrhdr *uh, u_int item); 404 405 /* 406 * Population count algorithm using SWAR approach 407 * - "SIMD Within A Register". 408 */ 409 410 static __inline uint16_t 411 bitcount16(uint32_t x) 412 { 413 414 x = (x & 0x5555) + ((x & 0xaaaa) >> 1); 415 x = (x & 0x3333) + ((x & 0xcccc) >> 2); 416 x = (x + (x >> 4)) & 0x0f0f; 417 x = (x + (x >> 8)) & 0x00ff; 418 return (x); 419 } 420 421 static __inline uint32_t 422 bitcount32(uint32_t x) 423 { 424 425 x = (x & 0x55555555) + ((x & 0xaaaaaaaa) >> 1); 426 x = (x & 0x33333333) + ((x & 0xcccccccc) >> 2); 427 x = (x + (x >> 4)) & 0x0f0f0f0f; 428 x = (x + (x >> 8)); 429 x = (x + (x >> 16)) & 0x000000ff; 430 return (x); 431 } 432 433 static __inline uint64_t 434 bitcount64(uint64_t x) 435 { 436 437 x = (x & 0x5555555555555555) + ((x & 0xaaaaaaaaaaaaaaaa) >> 1); 438 x = (x & 0x3333333333333333) + ((x & 0xcccccccccccccccc) >> 2); 439 x = (x + (x >> 4)) & 0x0f0f0f0f0f0f0f0f; 440 x = (x + (x >> 8)); 441 x = (x + (x >> 16)); 442 x = (x + (x >> 32)) & 0x000000ff; 443 return (x); 444 } 445 446 #endif /* _KERNEL */ 447 #endif /* !_SYS_SYSTM_H_ */ 448