osfmk/kern/clock.h

   1 /*
   2  * Copyright (c) 2000-2008 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  */
  33
  34 #ifndef _KERN_CLOCK_H_
  35 #define _KERN_CLOCK_H_
  36
  37 #include <stdint.h>
  38 #include <mach/mach_types.h>
  39 #include <mach/clock_types.h>
  40 #include <mach/message.h>
  41 #include <mach/mach_time.h>
  42
  43 #include <kern/kern_types.h>
  44
  45 #include <sys/cdefs.h>
  46
  47 #ifdef  __LP64__
  48
  49 typedef unsigned long           clock_sec_t;
  50 typedef unsigned int            clock_usec_t, clock_nsec_t;
  51
  52 #else   /* __LP64__ */
  53
  54 typedef uint32_t                        clock_sec_t;
  55 typedef uint32_t                        clock_usec_t, clock_nsec_t;
  56
  57 #endif  /* __LP64__ */
  58
  59 #ifdef  MACH_KERNEL_PRIVATE
  60
  61 #include <kern/queue.h>
  62
  63 /*
  64  * Clock operations list structure. Contains vectors to machine
  65  * dependent clock routines.
  66  */
  67 struct  clock_ops {
  68         int             (*c_config)(void);              /* configuration */
  69
  70         int             (*c_init)(void);                /* initialize */
  71
  72         kern_return_t   (*c_gettime)(   /* get time */
  73                                 mach_timespec_t                 *cur_time);
  74
  75         kern_return_t   (*c_getattr)(   /* get attributes */
  76                                 clock_flavor_t                  flavor,
  77                                 clock_attr_t                    attr,
  78                                 mach_msg_type_number_t  *count);
  79 };
  80 typedef struct clock_ops        *clock_ops_t;
  81 typedef struct clock_ops        clock_ops_data_t;
  82
  83 /*
  84  * Actual clock object data structure. Contains the machine
  85  * dependent operations list and clock operation ports.
  86  */
  87 struct  clock {
  88         clock_ops_t                     cl_ops;                 /* operations list */
  89         struct ipc_port         *cl_service;    /* service port */
  90         struct ipc_port         *cl_control;    /* control port */
  91 };
  92 typedef struct clock            clock_data_t;
  93
  94 /*
  95  * Configure the clock system.
  96  */
  97 extern void             clock_config(void);
  98 extern void             clock_oldconfig(void);
  99
 100 /*
 101  * Initialize the clock system.
 102  */
 103 extern void             clock_init(void);
 104 extern void             clock_oldinit(void);
 105
 106 extern void             clock_timebase_init(void);
 107
 108 /*
 109  * Initialize the clock ipc service facility.
 110  */
 111 extern void             clock_service_create(void);
 112
 113 extern void                     clock_gettimeofday_set_commpage(
 114                                                 uint64_t                                abstime,
 115                                                 uint64_t                                epoch,
 116                                                 uint64_t                                offset,
 117                                                 clock_sec_t                             *secs,
 118                                                 clock_usec_t                    *microsecs);
 119
 120 extern void                     machine_delay_until(
 121                                                 uint64_t                deadline);
 122
 123 #include <stat_time.h>
 124
 125 #if     STAT_TIME || GPROF
 126
 127 extern void             hertz_tick(
 128                                         natural_t               ticks,
 129                                         boolean_t               usermode,       /* executing user code */
 130                                         natural_t               pc);
 131
 132 #endif  /* STAT_TIME */
 133
 134 extern uint32_t         hz_tick_interval;
 135
 136 extern void             absolutetime_to_nanotime(
 137                                         uint64_t                abstime,
 138                                         clock_sec_t             *secs,
 139                                         clock_nsec_t    *nanosecs);
 140
 141 extern void             nanotime_to_absolutetime(
 142                                         clock_sec_t             secs,
 143                                         clock_nsec_t    nanosecs,
 144                                         uint64_t                *result);
 145
 146 #endif /* MACH_KERNEL_PRIVATE */
 147
 148 __BEGIN_DECLS
 149
 150 #ifdef  XNU_KERNEL_PRIVATE
 151
 152 extern void                     clock_adjtime(
 153                                                 long            *secs,
 154                                                 int                     *microsecs);
 155
 156 extern void                     clock_initialize_calendar(void);
 157
 158 extern void                     clock_wakeup_calendar(void);
 159
 160 extern void                     clock_gettimeofday(
 161                                                 clock_sec_t                     *secs,
 162                                                 clock_usec_t            *microsecs);
 163
 164 extern void                     clock_set_calendar_microtime(
 165                                                 clock_sec_t                     secs,
 166                                                 clock_usec_t            microsecs);
 167
 168 extern void                     clock_get_boottime_nanotime(
 169                                                 clock_sec_t                     *secs,
 170                                                 clock_nsec_t            *nanosecs);
 171
 172 extern void                     absolutetime_to_microtime(
 173                                                 uint64_t                        abstime,
 174                                                 clock_sec_t                     *secs,
 175                                                 clock_usec_t            *microsecs);
 176
 177 extern void                     clock_deadline_for_periodic_event(
 178                                                 uint64_t                        interval,
 179                                                 uint64_t                        abstime,
 180                                                 uint64_t                        *deadline);
 181
 182 #if     CONFIG_DTRACE
 183
 184 extern void                     clock_get_calendar_nanotime_nowait(
 185                                                 clock_sec_t                     *secs,
 186                                                 clock_nsec_t            *nanosecs);
 187
 188 #endif  /* CONFIG_DTRACE */
 189
 190 #endif  /* XNU_KERNEL_PRIVATE */
 191
 192 extern void                     clock_get_calendar_microtime(
 193                                                 clock_sec_t                     *secs,
 194                                                 clock_usec_t            *microsecs);
 195
 196 extern void                     clock_get_calendar_nanotime(
 197                                                 clock_sec_t                     *secs,
 198                                                 clock_nsec_t            *nanosecs);
 199
 200 extern void                     clock_get_system_microtime(
 201                                                 clock_sec_t                     *secs,
 202                                                 clock_usec_t            *microsecs);
 203
 204 extern void                     clock_get_system_nanotime(
 205                                                 clock_sec_t                     *secs,
 206                                                 clock_nsec_t            *nanosecs);
 207
 208 extern void                             clock_timebase_info(
 209                                                         mach_timebase_info_t    info);
 210
 211 extern void                             clock_get_uptime(
 212                                                         uint64_t                *result);
 213
 214 extern void                             clock_interval_to_deadline(
 215                                                         uint32_t                interval,
 216                                                         uint32_t                scale_factor,
 217                                                         uint64_t                *result);
 218
 219 extern void                             clock_interval_to_absolutetime_interval(
 220                                                         uint32_t                interval,
 221                                                         uint32_t                scale_factor,
 222                                                         uint64_t                *result);
 223
 224 extern void                             clock_absolutetime_interval_to_deadline(
 225                                                         uint64_t                abstime,
 226                                                         uint64_t                *result);
 227
 228 extern void                             clock_delay_until(
 229                                                         uint64_t                deadline);
 230
 231 extern void                             absolutetime_to_nanoseconds(
 232                                                         uint64_t                abstime,
 233                                                         uint64_t                *result);
 234
 235 extern void             nanoseconds_to_absolutetime(
 236                                                         uint64_t                nanoseconds,
 237                                                         uint64_t                *result);
 238
 239 #ifdef  KERNEL_PRIVATE
 240
 241 /*
 242  * Obsolete interfaces.
 243  */
 244
 245 #ifndef __LP64__
 246
 247 #define MACH_TIMESPEC_SEC_MAX           (0 - 1)
 248 #define MACH_TIMESPEC_NSEC_MAX          (NSEC_PER_SEC - 1)
 249
 250 #define MACH_TIMESPEC_MAX       ((mach_timespec_t) {                            \
 251                                                                         MACH_TIMESPEC_SEC_MAX,          \
 252                                                                         MACH_TIMESPEC_NSEC_MAX } )
 253 #define MACH_TIMESPEC_ZERO      ((mach_timespec_t) { 0, 0 } )
 254
 255 #define ADD_MACH_TIMESPEC_NSEC(t1, nsec)                \
 256   do {                                                                                  \
 257         (t1)->tv_nsec += (clock_res_t)(nsec);           \
 258         if ((clock_res_t)(nsec) > 0 &&                          \
 259                         (t1)->tv_nsec >= NSEC_PER_SEC) {        \
 260                 (t1)->tv_nsec -= NSEC_PER_SEC;                  \
 261                 (t1)->tv_sec += 1;                                              \
 262         }                                                                                       \
 263         else if ((clock_res_t)(nsec) < 0 &&                     \
 264                                  (t1)->tv_nsec < 0) {                   \
 265                 (t1)->tv_nsec += NSEC_PER_SEC;                  \
 266                 (t1)->tv_sec -= 1;                                              \
 267         }                                                                                       \
 268   } while (0)
 269
 270
 271 extern mach_timespec_t  clock_get_system_value(void);
 272
 273 extern mach_timespec_t  clock_get_calendar_value(void);
 274
 275 #else   /* __LP64__ */
 276
 277 #ifdef  XNU_KERNEL_PRIVATE
 278
 279 #define MACH_TIMESPEC_ZERO      ((mach_timespec_t) { 0, 0 } )
 280
 281 #endif  /* XNU_KERNEL_PRIVATE */
 282
 283 #endif  /* __LP64__ */
 284
 285 extern void                             delay_for_interval(
 286                                                         uint32_t                interval,
 287                                                         uint32_t                scale_factor);
 288
 289 #ifndef MACH_KERNEL_PRIVATE
 290
 291 #ifndef __LP64__
 292
 293 #ifndef ABSOLUTETIME_SCALAR_TYPE
 294
 295 #define clock_get_uptime(a)             \
 296         clock_get_uptime(__OSAbsoluteTimePtr(a))
 297
 298 #define clock_interval_to_deadline(a, b, c)             \
 299         clock_interval_to_deadline((a), (b), __OSAbsoluteTimePtr(c))
 300
 301 #define clock_interval_to_absolutetime_interval(a, b, c)        \
 302         clock_interval_to_absolutetime_interval((a), (b), __OSAbsoluteTimePtr(c))
 303
 304 #define clock_absolutetime_interval_to_deadline(a, b)   \
 305         clock_absolutetime_interval_to_deadline(__OSAbsoluteTime(a), __OSAbsoluteTimePtr(b))
 306
 307 #define clock_deadline_for_periodic_event(a, b, c)      \
 308         clock_deadline_for_periodic_event(__OSAbsoluteTime(a), __OSAbsoluteTime(b), __OSAbsoluteTimePtr(c))
 309
 310 #define clock_delay_until(a)    \
 311         clock_delay_until(__OSAbsoluteTime(a))
 312
 313 #define absolutetime_to_nanoseconds(a, b)       \
 314         absolutetime_to_nanoseconds(__OSAbsoluteTime(a), (b))
 315
 316 #define nanoseconds_to_absolutetime(a, b)       \
 317         nanoseconds_to_absolutetime((a), __OSAbsoluteTimePtr(b))
 318
 319 #endif  /* ABSOLUTETIME_SCALAR_TYPE */
 320
 321 #endif  /* __LP64__ */
 322
 323 #endif  /* MACH_KERNEL_PRIVATE */
 324
 325 #endif  /* KERNEL_PRIVATE */
 326
 327 __END_DECLS
 328
 329 #endif  /* _KERN_CLOCK_H_ */