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.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
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 $
42 #error "This file should not be included by userland programs."
45 #ifndef _MACHINE_TYPES_H_
46 #include <machine/types.h>
48 #include <machine/stdarg.h>
49 #include <machine/atomic.h>
50 #include <machine/cpufunc.h>
52 extern int securelevel; /* system security level (see init(8)) */
53 extern int kernel_mem_readonly; /* disable writes to kernel memory */
55 extern int cold; /* nonzero if we are doing a cold boot */
56 extern int tsleep_now_works; /* tsleep won't just return any more */
57 extern const char *panicstr; /* panic message */
58 extern int dumping; /* system is dumping */
59 extern int safepri; /* safe ipl when cold or panicing */
60 extern int osreldate; /* System release date */
61 extern char version[]; /* system version */
62 extern char copyright[]; /* system copyright */
64 extern int selwait; /* select timeout address */
66 extern u_char curpriority; /* priority of current process */
67 extern int cpu_mwait_spin; /* typically set in machdep, used by lwkt */
69 extern long physmem; /* physical memory */
71 extern cdev_t dumpdev; /* dump device */
72 extern u_int64_t dumplo64; /* block number into dumpdev, start of dump */
74 extern cdev_t rootdev; /* root device */
75 extern cdev_t rootdevs[2]; /* possible root devices */
76 extern char *rootdevnames[2]; /* names of possible root devices */
77 extern char *ZeroPage;
79 extern int boothowto; /* reboot flags, from console subsystem */
80 extern int bootverbose; /* nonzero to print verbose messages */
82 extern int maxusers; /* system tune hint */
84 extern int ncpus; /* total number of cpus (real, hyper, virtual)*/
85 extern int ncpus_fit; /* round up to a power of 2 */
86 extern int ncpus_fit_mask; /* ncpus_fit - 1 */
87 extern int clocks_running; /* timing/timeout subsystem is operational */
89 /* XXX TGEN these don't belong here, they're MD on pc64 */
90 extern u_int cpu_feature; /* CPUID_* features */
91 extern u_int cpu_feature2; /* CPUID2_* features */
92 extern u_int cpu_mi_feature; /* CPU_MI_XXX machine-nonspecific features */
93 extern cpumask_t usched_global_cpumask;
95 extern int nfs_diskless_valid; /* NFS diskless params were obtained */
96 extern vm_paddr_t Maxmem; /* Highest physical memory address in system */
98 #ifdef INVARIANTS /* The option is always available */
99 #define KASSERT(exp,msg) do { if (__predict_false(!(exp))) \
100 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)
107 #define KKASSERT_UNSPIN(exp, spin) \
108 do { if (__predict_false(!(exp))) { \
109 spin_unlock_any(spin); \
110 panic("assertion \"%s\" failed " \
111 "in %s at %s:%u", #exp, __func__, \
112 __FILE__, __LINE__); } } while (0)
115 #define KASSERT(exp,msg) do { } while (0)
116 #define KKASSERT(exp) do { } while (0)
117 #define KKASSERT_UNSPIN(exp, spin) do { } while (0)
118 #define __debugvar __attribute__((__unused__))
122 * General function declarations.
129 struct lwkt_serialize;
144 void Debugger (const char *msg);
145 void print_backtrace(int count);
146 void mi_gdinit (struct globaldata *gd, int cpu);
147 void slab_gdinit (struct globaldata *gd);
148 void mi_proc0init(struct globaldata *gd, struct user *proc0paddr);
149 int setjmp(struct _jmp_buf *) __returns_twice;
150 void longjmp(struct _jmp_buf *, int) __dead2;
152 int seltrue (cdev_t dev, int which);
153 int ureadc (int, struct uio *);
154 void *hashinit (int count, struct malloc_type *type, u_long *hashmask);
155 void hashdestroy(void *vhashtbl, struct malloc_type *type, u_long hashmask);
156 void *phashinit (int count, struct malloc_type *type, u_long *nentries);
157 void *hashinit_ext (int count, size_t size,
158 struct malloc_type *type, u_long *hashmask);
159 void *phashinit_ext (int count, size_t size,
160 struct malloc_type *type, u_long *nentries);
162 int cpu_sanitize_frame (struct trapframe *);
163 int cpu_sanitize_tls (struct savetls *);
164 void cpu_spinlock_contested(void);
165 void cpu_halt (void) __dead2;
166 void cpu_idle_halt (void);
167 void cpu_reset (void);
169 void cpu_rootconf (void);
170 void cpu_vmspace_alloc(struct vmspace *);
171 void cpu_vmspace_free(struct vmspace *);
172 void cpu_vkernel_trap(struct trapframe *, int);
173 enum vmm_guest_type detect_virtual(void);
174 void set_user_TLS(void);
175 void set_vkernel_fp(struct trapframe *);
176 int kvm_access_check(vm_offset_t, vm_offset_t, int);
181 extern const uint32_t crc32_tab[];
182 uint32_t crc32(const void *buf, size_t size);
183 uint32_t crc32_ext(const void *buf, size_t size, uint32_t ocrc);
186 * Newer (fast) iscsi CRC32 APIs.
188 * NOTE: iscsi_crc32_ext() inverts ocrc input and output as expected,
189 * pass a seed of 0 for the equivalent of iscsi_crc32().
191 * calculate_crc32c() does not invert crc32c input and output
192 * to maintain FreeBSD API compatibility.
194 uint32_t iscsi_crc32(const void *buf, size_t size);
195 uint32_t iscsi_crc32_ext(const void *buf, size_t size, uint32_t ocrc);
196 uint32_t calculate_crc32c(uint32_t crc32c, const unsigned char *buffer,
197 unsigned int length);
199 void init_param1 (void);
200 void init_param2 (int physpages);
201 void tablefull (const char *);
202 int kvcprintf (char const *, void (*)(int, void*), void *,
203 __va_list) __printf0like(1, 0);
204 void kvcreinitspin(void);
205 int log (int, const char *, ...) __printflike(2, 3);
206 void logwakeup (void);
207 void log_console (struct uio *);
208 int kprintf (const char *, ...) __printflike(1, 2);
209 void kprintf0 (const char *, ...) __printflike(1, 2);
210 int krateprintf (struct krate *, const char *, ...) __printflike(2, 3);
211 int ksnprintf (char *, size_t, const char *, ...) __printflike(3, 4);
212 int ksprintf (char *buf, const char *, ...) __printflike(2, 3);
213 int uprintf (const char *, ...) __printflike(1, 2);
214 int kvprintf (const char *, __va_list) __printflike(1, 0);
215 int kvsnprintf (char *, size_t, const char *,
216 __va_list) __printflike(3, 0);
217 int kvasnprintf (char **, size_t, const char *,
218 __va_list) __printflike(3, 0);
219 int kvsprintf (char *buf, const char *,
220 __va_list) __printflike(2, 0);
221 int ttyprintf (struct tty *, const char *, ...) __printflike(2, 3);
222 void hexdump (const void *ptr, int length, const char *hdr, int flags);
223 void kprint_cpuset(cpumask_t *mask);
224 #define HD_COLUMN_MASK 0xff
225 #define HD_DELIM_MASK 0xff00
226 #define HD_OMIT_COUNT (1 << 16)
227 #define HD_OMIT_HEX (1 << 17)
228 #define HD_OMIT_CHARS (1 << 18)
229 int ksscanf(const char *, char const *, ...)
230 __nonnull(1, 2) __scanflike(2, 3);
231 int kvsscanf(const char *, char const *, __va_list)
232 __nonnull(1, 2) __scanflike(2, 0);
233 void kvasfree(char **);
235 long strtol(const char *, char **, int) __nonnull(1);
236 u_long strtoul(const char *, char **, int) __nonnull(1);
237 quad_t strtoq(const char *, char **, int) __nonnull(1);
238 u_quad_t strtouq(const char *, char **, int) __nonnull(1);
241 * NOTE: some functions commonly used by device drivers may be passed
242 * pointers to volatile storage, volatile set to avoid warnings.
244 * NOTE: When using builtin's, GCC does enormous optimizations and makes
245 * a number of assumptions that can cause later unrelated conditionals
246 * to be optimized out. In the case of memset and memmove, GCC
247 * assumes that (to) and (from) cannot be NULL (even when (len) might
248 * be 0), and will optimize-out later NULL tests on (to) or (from).
251 #define bcopy(from, to, len) \
252 __builtin_memmove(__DEQUALIFY(void *, (to)), \
253 __DEQUALIFY(void *, (from)), \
255 #define memcpy(to, from, len) \
256 __builtin_memcpy(__DEQUALIFY(void *, (to)), \
257 __DEQUALIFY(void *, (from)), \
259 #define memset(ptr, c, len) \
260 __builtin_memset(__DEQUALIFY(void *, (ptr)), (c), (len))
261 #define memmove(to, from, len) \
262 __builtin_memmove(__DEQUALIFY(void *, (to)), \
263 __DEQUALIFY(void *, (from)), \
265 #define bzero(buf, len) \
266 __builtin_memset(__DEQUALIFY(void *, (buf)), 0, (len))
268 void bcopy(volatile const void *from, volatile void *to, size_t len)
270 void *memcpy(void *to, const void *from, size_t len)
272 void *memmove(void *, const void *, size_t);
273 void *memset(void *, int, size_t);
274 void bzero(volatile void *buf, size_t len) __nonnull(1);
276 void _bcopy(volatile const void *from, volatile void *to, size_t len)
278 void *_memcpy(void *to, const void *from, size_t len)
280 void *_memmove(void *, const void *, size_t);
281 void *_memset(void *, int, size_t);
282 void _bzero(volatile void *buf, size_t len) __nonnull(1);
283 void bzeront(volatile void *buf, size_t len) __nonnull(1);
285 long kreadmem64(const void *addr);
287 int copystr (const void *kfaddr, void *kdaddr, size_t len,
288 size_t *lencopied) __nonnull(1, 2);
289 int copyinstr (const void *udaddr, void *kaddr, size_t len,
290 size_t *lencopied) __nonnull(1, 2);
291 int copyin(const void *udaddr, void *kaddr, size_t len) __nonnull(1, 2);
292 int copyin_nofault(const void *udaddr, void *kaddr, size_t len)
294 int copyout(const void *kaddr, void *udaddr, size_t len) __nonnull(1, 2);
295 int copyout_nofault(const void *kaddr, void *udaddr, size_t len)
298 int fubyte (const uint8_t *base);
299 int subyte (uint8_t *base, uint8_t byte);
300 int32_t fuword32 (const uint32_t *base);
301 int64_t fuword64 (const uint64_t *base);
302 int suword32 (uint32_t *base, int word);
303 int suword64 (uint64_t *base, uint64_t word);
304 uint32_t casu32(volatile uint32_t *p, uint32_t oldval, uint32_t newval);
305 uint64_t casu64(volatile uint64_t *p, uint64_t oldval, uint64_t newval);
306 uint32_t swapu32(volatile uint32_t *p, uint32_t val);
307 uint64_t swapu64(volatile uint64_t *p, uint64_t val);
308 uint32_t fuwordadd32(volatile uint32_t *p, uint32_t val);
309 uint64_t fuwordadd64(volatile uint64_t *p, uint64_t val);
311 void DELAY(int usec);
312 void DRIVERSLEEP(int usec);
314 void startprofclock (struct proc *);
315 void stopprofclock (struct proc *);
316 void setstatclockrate (int hzrate);
319 * Kernel environment support functions and sundry.
321 char *kgetenv (const char *name);
322 int ksetenv(const char *name, const char *value);
323 int kunsetenv(const char *name);
324 void kfreeenv(char *env);
325 int ktestenv(const char *name);
326 int kgetenv_int (const char *name, int *data);
327 int kgetenv_string (const char *name, char *data, int size);
328 int kgetenv_ulong(const char *name, unsigned long *data);
329 int kgetenv_quad (const char *name, quad_t *data);
330 int kgetenv_long(const char *name, long *data);
331 extern char *kern_envp;
333 #include <sys/libkern.h>
335 /* Initialize the world */
336 void mi_startup (void);
339 /* Finalize the world. */
340 void shutdown_nice (int);
343 * Kernel to clock driver interface.
345 void inittodr (time_t base);
346 void resettodr (void);
347 void startrtclock (void);
350 typedef void timeout_t (void *); /* timeout function type */
352 /* Interrupt management */
355 * For the alpha arch, some of these functions are static __inline, and
356 * the others should be.
358 #if defined(__x86_64__)
359 void setdelayed (void);
360 void setsoftcambio (void);
361 void setsoftcamnet (void);
362 void setsoftunused02 (void);
363 void setsoftcrypto (void);
364 void setsoftunused01 (void);
365 void setsofttty (void);
366 void setsoftvm (void);
367 void setsofttq (void);
368 void schedsofttty (void);
370 void splz_check (void);
371 void cpu_mmw_pause_int(int*, int, int, int);
372 void cpu_mmw_pause_long(long*, long, int, int);
373 void cpu_smp_stopped(void);
374 #endif /* __x86_64__ */
377 * Various callout lists.
380 /* Exit callout list declarations. */
381 typedef void (*exitlist_fn) (struct thread *td);
383 int at_exit (exitlist_fn function);
384 int rm_at_exit (exitlist_fn function);
386 /* Fork callout list declarations. */
387 typedef void (*forklist_fn) (struct proc *parent, struct proc *child,
390 int at_fork (forklist_fn function);
391 int rm_at_fork (forklist_fn function);
393 extern struct globaldata *panic_cpu_gd;
396 * Common `proc' functions are declared here so that proc.h can be included
399 int tsleep(const volatile void *, int, const char *, int);
400 int ssleep(const volatile void *, struct spinlock *, int, const char *, int)
402 int lksleep(const volatile void *, struct lock *, int, const char *, int)
404 int mtxsleep(const volatile void *, struct mtx *, int, const char *, int)
406 int zsleep(const volatile void *, struct lwkt_serialize *, int, const char *, int)
408 void tsleep_interlock(const volatile void *, int) __nonnull(1);
409 void tsleep_remove (struct thread *);
410 int lwkt_sleep (const char *, int);
412 void wakeup(const volatile void *chan) __nonnull(1);
413 void wakeup_one(const volatile void *chan) __nonnull(1);
414 void wakeup_mycpu(const volatile void *chan) __nonnull(1);
415 void wakeup_mycpu_one(const volatile void *chan) __nonnull(1);
416 void wakeup_oncpu(struct globaldata *gd, const volatile void *chan)
418 void wakeup_oncpu_one(struct globaldata *gd, const volatile void *chan)
420 void wakeup_domain(const volatile void *chan, int domain) __nonnull(1);
421 void wakeup_domain_one(const volatile void *chan, int domain) __nonnull(1);
422 void wakeup_start_delayed(void);
423 void wakeup_end_delayed(void);
426 * Common `cdev_t' stuff are declared here to avoid #include poisoning
431 dev_t devid_from_dev(cdev_t x);
432 cdev_t dev_from_devid(dev_t x, int b);
433 int uminor(dev_t dev);
434 int umajor(dev_t dev);
435 dev_t makeudev(int x, int y);
438 * Unit number allocation API. (kern/subr_unit.c)
441 struct unrhdr *new_unrhdr(int low, int high, struct lock *lock);
442 void delete_unrhdr(struct unrhdr *uh);
443 int alloc_unr(struct unrhdr *uh);
444 int alloc_unrl(struct unrhdr *uh);
445 void free_unr(struct unrhdr *uh, u_int item);
448 * Population count algorithm using SWAR approach
449 * - "SIMD Within A Register".
452 static __inline uint16_t
453 bitcount16(uint32_t x)
456 x = (x & 0x5555) + ((x & 0xaaaa) >> 1);
457 x = (x & 0x3333) + ((x & 0xcccc) >> 2);
458 x = (x + (x >> 4)) & 0x0f0f;
459 x = (x + (x >> 8)) & 0x00ff;
463 static __inline uint32_t
464 bitcount32(uint32_t x)
467 x = (x & 0x55555555) + ((x & 0xaaaaaaaa) >> 1);
468 x = (x & 0x33333333) + ((x & 0xcccccccc) >> 2);
469 x = (x + (x >> 4)) & 0x0f0f0f0f;
471 x = (x + (x >> 16)) & 0x000000ff;
475 static __inline uint64_t
476 bitcount64(uint64_t x)
479 x = (x & 0x5555555555555555) + ((x & 0xaaaaaaaaaaaaaaaa) >> 1);
480 x = (x & 0x3333333333333333) + ((x & 0xcccccccccccccccc) >> 2);
481 x = (x + (x >> 4)) & 0x0f0f0f0f0f0f0f0f;
484 x = (x + (x >> 32)) & 0x000000ff;
489 * Calculate (a * b) / c with a 128-bit intermediate computation to
492 static __inline uint64_t
493 muldivu64(uint64_t a, uint64_t b, uint64_t d)
497 t = (unsigned __int128)a * b;
498 if (t / d > 0xFFFFFFFFFFFFFFFFLU) {
499 kprintf("muldivu64: overflow %ld,%ld,%ld\n", a, b, d);
505 #endif /* !_SYS_SYSTM_H_ */