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.
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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
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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)
101 #define KKASSERT(exp) do { if (__predict_false(!(exp))) \
102 panic("assertion \"%s\" failed " \
103 "in %s at %s:%u", #exp, __func__, \
104 __FILE__, __LINE__); } while (0)
107 #define KASSERT(exp,msg) do { } while (0)
108 #define KKASSERT(exp) do { } while (0)
109 #define __debugvar __attribute__((__unused__))
113 * General function declarations.
120 struct lwkt_serialize;
135 void Debugger (const char *msg);
136 void print_backtrace(int count);
137 void mi_gdinit (struct globaldata *gd, int cpu);
138 void slab_gdinit (struct globaldata *gd);
139 void mi_proc0init(struct globaldata *gd, struct user *proc0paddr);
140 int setjmp(struct _jmp_buf *) __returns_twice;
141 void longjmp(struct _jmp_buf *, int) __dead2;
143 int seltrue (cdev_t dev, int which);
144 int ureadc (int, struct uio *);
145 void *hashinit (int count, struct malloc_type *type, u_long *hashmask);
146 void hashdestroy(void *vhashtbl, struct malloc_type *type, u_long hashmask);
147 void *phashinit (int count, struct malloc_type *type, u_long *nentries);
148 void *hashinit_ext (int count, size_t size,
149 struct malloc_type *type, u_long *hashmask);
150 void *phashinit_ext (int count, size_t size,
151 struct malloc_type *type, u_long *nentries);
153 int cpu_sanitize_frame (struct trapframe *);
154 int cpu_sanitize_tls (struct savetls *);
155 void cpu_spinlock_contested(void);
156 void cpu_halt (void) __dead2;
157 void cpu_idle_halt (void);
158 void cpu_reset (void);
160 void cpu_rootconf (void);
161 void cpu_vmspace_alloc(struct vmspace *);
162 void cpu_vmspace_free(struct vmspace *);
163 void cpu_vkernel_trap(struct trapframe *, int);
164 enum vmm_guest_type detect_virtual(void);
165 void set_user_TLS(void);
166 void set_vkernel_fp(struct trapframe *);
167 int kvm_access_check(vm_offset_t, vm_offset_t, int);
169 vm_paddr_t kvtop(void *addr);
174 extern const uint32_t crc32_tab[];
175 uint32_t crc32(const void *buf, size_t size);
176 uint32_t crc32_ext(const void *buf, size_t size, uint32_t ocrc);
179 * Newer (fast) iscsi CRC32 APIs.
181 * NOTE: iscsi_crc32_ext() inverts ocrc input and output as expected,
182 * pass a seed of 0 for the equivalent of iscsi_crc32().
184 * calculate_crc32c() does not invert crc32c input and output
185 * to maintain FreeBSD API compatibility.
187 uint32_t iscsi_crc32(const void *buf, size_t size);
188 uint32_t iscsi_crc32_ext(const void *buf, size_t size, uint32_t ocrc);
189 uint32_t calculate_crc32c(uint32_t crc32c, const unsigned char *buffer,
190 unsigned int length);
192 void init_param1 (void);
193 void init_param2 (int physpages);
194 void tablefull (const char *);
195 int kvcprintf (char const *, void (*)(int, void*), void *,
196 __va_list) __printf0like(1, 0);
197 void kvcreinitspin(void);
198 int log (int, const char *, ...) __printflike(2, 3);
199 void logwakeup (void);
200 void log_console (struct uio *);
201 int kprintf (const char *, ...) __printflike(1, 2);
202 void kprintf0 (const char *, ...) __printflike(1, 2);
203 void krateprintf (struct krate *, const char *, ...) __printflike(2, 3);
204 int ksnprintf (char *, size_t, const char *, ...) __printflike(3, 4);
205 int ksprintf (char *buf, const char *, ...) __printflike(2, 3);
206 int uprintf (const char *, ...) __printflike(1, 2);
207 int kvprintf (const char *, __va_list) __printflike(1, 0);
208 int kvsnprintf (char *, size_t, const char *,
209 __va_list) __printflike(3, 0);
210 int kvasnprintf (char **, size_t, const char *,
211 __va_list) __printflike(3, 0);
212 int kvsprintf (char *buf, const char *,
213 __va_list) __printflike(2, 0);
214 int ttyprintf (struct tty *, const char *, ...) __printflike(2, 3);
215 void hexdump (const void *ptr, int length, const char *hdr, int flags);
216 void kprint_cpuset(cpumask_t *mask);
217 #define HD_COLUMN_MASK 0xff
218 #define HD_DELIM_MASK 0xff00
219 #define HD_OMIT_COUNT (1 << 16)
220 #define HD_OMIT_HEX (1 << 17)
221 #define HD_OMIT_CHARS (1 << 18)
222 int ksscanf(const char *, char const *, ...)
223 __nonnull(1, 2) __scanflike(2, 3);
224 int kvsscanf(const char *, char const *, __va_list)
225 __nonnull(1, 2) __scanflike(2, 0);
226 void kvasfree(char **);
228 long strtol(const char *, char **, int) __nonnull(1);
229 u_long strtoul(const char *, char **, int) __nonnull(1);
230 quad_t strtoq(const char *, char **, int) __nonnull(1);
231 u_quad_t strtouq(const char *, char **, int) __nonnull(1);
234 * NOTE: some functions commonly used by device drivers may be passed
235 * pointers to volatile storage, volatile set to avoid warnings.
237 * NOTE: When using builtin's, GCC does enormous optimizations and makes
238 * a number of assumptions that can cause later unrelated conditionals
239 * to be optimized out. In the case of memset and memmove, GCC
240 * assumes that (to) and (from) cannot be NULL (even when (len) might
241 * be 0), and will optimize-out later NULL tests on (to) or (from).
244 #define bcopy(from, to, len) \
245 __builtin_memmove(__DEQUALIFY(void *, (to)), \
246 __DEQUALIFY(void *, (from)), \
248 #define memcpy(to, from, len) \
249 __builtin_memcpy(__DEQUALIFY(void *, (to)), \
250 __DEQUALIFY(void *, (from)), \
252 #define memset(ptr, c, len) \
253 __builtin_memset(__DEQUALIFY(void *, (ptr)), (c), (len))
254 #define memmove(to, from, len) \
255 __builtin_memmove(__DEQUALIFY(void *, (to)), \
256 __DEQUALIFY(void *, (from)), \
258 #define bzero(buf, len) \
259 __builtin_memset(__DEQUALIFY(void *, (buf)), 0, (len))
261 void bcopy(volatile const void *from, volatile void *to, size_t len)
263 void *memcpy(void *to, const void *from, size_t len)
265 void *memmove(void *, const void *, size_t);
266 void *memset(void *, int, size_t);
267 void bzero(volatile void *buf, size_t len) __nonnull(1);
269 void _bcopy(volatile const void *from, volatile void *to, size_t len)
271 void *_memcpy(void *to, const void *from, size_t len)
273 void *_memmove(void *, const void *, size_t);
274 void *_memset(void *, int, size_t);
275 void _bzero(volatile void *buf, size_t len) __nonnull(1);
276 void bzeront(volatile void *buf, size_t len) __nonnull(1);
278 long kreadmem64(const void *addr);
280 int copystr (const void *kfaddr, void *kdaddr, size_t len,
281 size_t *lencopied) __nonnull(1, 2);
282 int copyinstr (const void *udaddr, void *kaddr, size_t len,
283 size_t *lencopied) __nonnull(1, 2);
284 int copyin(const void *udaddr, void *kaddr, size_t len) __nonnull(1, 2);
285 int copyin_nofault(const void *udaddr, void *kaddr, size_t len)
287 int copyout(const void *kaddr, void *udaddr, size_t len) __nonnull(1, 2);
288 int copyout_nofault(const void *kaddr, void *udaddr, size_t len)
291 int fubyte (const uint8_t *base);
292 int subyte (uint8_t *base, uint8_t byte);
293 int32_t fuword32 (const uint32_t *base);
294 int64_t fuword64 (const uint64_t *base);
295 int suword32 (uint32_t *base, int word);
296 int suword64 (uint64_t *base, uint64_t word);
297 uint32_t casu32(volatile uint32_t *p, uint32_t oldval, uint32_t newval);
298 uint64_t casu64(volatile uint64_t *p, uint64_t oldval, uint64_t newval);
299 uint32_t swapu32(volatile uint32_t *p, uint32_t val);
300 uint64_t swapu64(volatile uint64_t *p, uint64_t val);
301 uint32_t fuwordadd32(volatile uint32_t *p, uint32_t val);
302 uint64_t fuwordadd64(volatile uint64_t *p, uint64_t val);
304 void DELAY(int usec);
305 void DRIVERSLEEP(int usec);
307 void startprofclock (struct proc *);
308 void stopprofclock (struct proc *);
309 void setstatclockrate (int hzrate);
312 * Kernel environment support functions and sundry.
314 char *kgetenv (const char *name);
315 int ksetenv(const char *name, const char *value);
316 int kunsetenv(const char *name);
317 void kfreeenv(char *env);
318 int ktestenv(const char *name);
319 int kgetenv_int (const char *name, int *data);
320 int kgetenv_string (const char *name, char *data, int size);
321 int kgetenv_ulong(const char *name, unsigned long *data);
322 int kgetenv_quad (const char *name, quad_t *data);
323 int kgetenv_long(const char *name, long *data);
324 extern char *kern_envp;
326 #include <sys/libkern.h>
328 /* Initialize the world */
329 void mi_startup (void);
332 /* Finalize the world. */
333 void shutdown_nice (int);
336 * Kernel to clock driver interface.
338 void inittodr (time_t base);
339 void resettodr (void);
340 void startrtclock (void);
343 typedef void timeout_t (void *); /* timeout function type */
345 /* Interrupt management */
348 * For the alpha arch, some of these functions are static __inline, and
349 * the others should be.
351 #if defined(__x86_64__)
352 void setdelayed (void);
353 void setsoftcambio (void);
354 void setsoftcamnet (void);
355 void setsoftunused02 (void);
356 void setsoftcrypto (void);
357 void setsoftunused01 (void);
358 void setsofttty (void);
359 void setsoftvm (void);
360 void setsofttq (void);
361 void schedsofttty (void);
363 void splz_check (void);
364 void cpu_mmw_pause_int(int*, int, int, int);
365 void cpu_mmw_pause_long(long*, long, int, int);
366 void cpu_smp_stopped(void);
367 #endif /* __x86_64__ */
370 * Various callout lists.
373 /* Exit callout list declarations. */
374 typedef void (*exitlist_fn) (struct thread *td);
376 int at_exit (exitlist_fn function);
377 int rm_at_exit (exitlist_fn function);
379 /* Fork callout list declarations. */
380 typedef void (*forklist_fn) (struct proc *parent, struct proc *child,
383 int at_fork (forklist_fn function);
384 int rm_at_fork (forklist_fn function);
386 extern struct globaldata *panic_cpu_gd;
389 * Common `proc' functions are declared here so that proc.h can be included
392 int tsleep(const volatile void *, int, const char *, int);
393 int ssleep(const volatile void *, struct spinlock *, int, const char *, int)
395 int lksleep(const volatile void *, struct lock *, int, const char *, int)
397 int mtxsleep(const volatile void *, struct mtx *, int, const char *, int)
399 int zsleep(const volatile void *, struct lwkt_serialize *, int, const char *, int)
401 void tsleep_interlock(const volatile void *, int) __nonnull(1);
402 void tsleep_remove (struct thread *);
403 int lwkt_sleep (const char *, int);
405 void wakeup(const volatile void *chan) __nonnull(1);
406 void wakeup_one(const volatile void *chan) __nonnull(1);
407 void wakeup_mycpu(const volatile void *chan) __nonnull(1);
408 void wakeup_mycpu_one(const volatile void *chan) __nonnull(1);
409 void wakeup_oncpu(struct globaldata *gd, const volatile void *chan)
411 void wakeup_oncpu_one(struct globaldata *gd, const volatile void *chan)
413 void wakeup_domain(const volatile void *chan, int domain) __nonnull(1);
414 void wakeup_domain_one(const volatile void *chan, int domain) __nonnull(1);
415 void wakeup_start_delayed(void);
416 void wakeup_end_delayed(void);
419 * Common `cdev_t' stuff are declared here to avoid #include poisoning
424 udev_t dev2udev(cdev_t x);
425 cdev_t udev2dev(udev_t x, int b);
426 int uminor(udev_t dev);
427 int umajor(udev_t dev);
428 udev_t makeudev(int x, int y);
431 * Unit number allocation API. (kern/subr_unit.c)
434 struct unrhdr *new_unrhdr(int low, int high, struct lock *lock);
435 void delete_unrhdr(struct unrhdr *uh);
436 int alloc_unr(struct unrhdr *uh);
437 int alloc_unrl(struct unrhdr *uh);
438 void free_unr(struct unrhdr *uh, u_int item);
441 * Population count algorithm using SWAR approach
442 * - "SIMD Within A Register".
445 static __inline uint16_t
446 bitcount16(uint32_t x)
449 x = (x & 0x5555) + ((x & 0xaaaa) >> 1);
450 x = (x & 0x3333) + ((x & 0xcccc) >> 2);
451 x = (x + (x >> 4)) & 0x0f0f;
452 x = (x + (x >> 8)) & 0x00ff;
456 static __inline uint32_t
457 bitcount32(uint32_t x)
460 x = (x & 0x55555555) + ((x & 0xaaaaaaaa) >> 1);
461 x = (x & 0x33333333) + ((x & 0xcccccccc) >> 2);
462 x = (x + (x >> 4)) & 0x0f0f0f0f;
464 x = (x + (x >> 16)) & 0x000000ff;
468 static __inline uint64_t
469 bitcount64(uint64_t x)
472 x = (x & 0x5555555555555555) + ((x & 0xaaaaaaaaaaaaaaaa) >> 1);
473 x = (x & 0x3333333333333333) + ((x & 0xcccccccccccccccc) >> 2);
474 x = (x + (x >> 4)) & 0x0f0f0f0f0f0f0f0f;
477 x = (x + (x >> 32)) & 0x000000ff;
482 #endif /* !_SYS_SYSTM_H_ */