1 /* 2 * linux/include/linux/cpufreq.h 3 * 4 * Copyright (C) 2001 Russell King 5 * (C) 2002 - 2003 Dominik Brodowski <[email protected]> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 as 9 * published by the Free Software Foundation. 10 */ 11 #ifndef _LINUX_CPUFREQ_H 12 #define _LINUX_CPUFREQ_H 13 14 #include <linux/clk.h> 15 #include <linux/cpumask.h> 16 #include <linux/completion.h> 17 #include <linux/kobject.h> 18 #include <linux/notifier.h> 19 #include <linux/spinlock.h> 20 #include <linux/sysfs.h> 21 22 /********************************************************************* 23 * CPUFREQ INTERFACE * 24 *********************************************************************/ 25 /* 26 * Frequency values here are CPU kHz 27 * 28 * Maximum transition latency is in nanoseconds - if it's unknown, 29 * CPUFREQ_ETERNAL shall be used. 30 */ 31 32 #define CPUFREQ_ETERNAL (-1) 33 #define CPUFREQ_NAME_LEN 16 34 /* Print length for names. Extra 1 space for accomodating '\n' in prints */ 35 #define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1) 36 37 struct cpufreq_governor; 38 39 struct cpufreq_freqs { 40 unsigned int cpu; /* cpu nr */ 41 unsigned int old; 42 unsigned int new; 43 u8 flags; /* flags of cpufreq_driver, see below. */ 44 }; 45 46 struct cpufreq_cpuinfo { 47 unsigned int max_freq; 48 unsigned int min_freq; 49 50 /* in 10^(-9) s = nanoseconds */ 51 unsigned int transition_latency; 52 }; 53 54 struct cpufreq_user_policy { 55 unsigned int min; /* in kHz */ 56 unsigned int max; /* in kHz */ 57 }; 58 59 struct cpufreq_policy { 60 /* CPUs sharing clock, require sw coordination */ 61 cpumask_var_t cpus; /* Online CPUs only */ 62 cpumask_var_t related_cpus; /* Online + Offline CPUs */ 63 cpumask_var_t real_cpus; /* Related and present */ 64 65 unsigned int shared_type; /* ACPI: ANY or ALL affected CPUs 66 should set cpufreq */ 67 unsigned int cpu; /* cpu managing this policy, must be online */ 68 69 struct clk *clk; 70 struct cpufreq_cpuinfo cpuinfo;/* see above */ 71 72 unsigned int min; /* in kHz */ 73 unsigned int max; /* in kHz */ 74 unsigned int cur; /* in kHz, only needed if cpufreq 75 * governors are used */ 76 unsigned int restore_freq; /* = policy->cur before transition */ 77 unsigned int suspend_freq; /* freq to set during suspend */ 78 79 unsigned int policy; /* see above */ 80 unsigned int last_policy; /* policy before unplug */ 81 struct cpufreq_governor *governor; /* see below */ 82 void *governor_data; 83 char last_governor[CPUFREQ_NAME_LEN]; /* last governor used */ 84 85 struct work_struct update; /* if update_policy() needs to be 86 * called, but you're in IRQ context */ 87 88 struct cpufreq_user_policy user_policy; 89 struct cpufreq_frequency_table *freq_table; 90 91 struct list_head policy_list; 92 struct kobject kobj; 93 struct completion kobj_unregister; 94 95 /* 96 * The rules for this semaphore: 97 * - Any routine that wants to read from the policy structure will 98 * do a down_read on this semaphore. 99 * - Any routine that will write to the policy structure and/or may take away 100 * the policy altogether (eg. CPU hotplug), will hold this lock in write 101 * mode before doing so. 102 */ 103 struct rw_semaphore rwsem; 104 105 /* 106 * Fast switch flags: 107 * - fast_switch_possible should be set by the driver if it can 108 * guarantee that frequency can be changed on any CPU sharing the 109 * policy and that the change will affect all of the policy CPUs then. 110 * - fast_switch_enabled is to be set by governors that support fast 111 * freqnency switching with the help of cpufreq_enable_fast_switch(). 112 */ 113 bool fast_switch_possible; 114 bool fast_switch_enabled; 115 116 /* Synchronization for frequency transitions */ 117 bool transition_ongoing; /* Tracks transition status */ 118 spinlock_t transition_lock; 119 wait_queue_head_t transition_wait; 120 struct task_struct *transition_task; /* Task which is doing the transition */ 121 122 /* cpufreq-stats */ 123 struct cpufreq_stats *stats; 124 125 /* For cpufreq driver's internal use */ 126 void *driver_data; 127 }; 128 129 /* Only for ACPI */ 130 #define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ 131 #define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ 132 #define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ 133 #define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ 134 135 #ifdef CONFIG_CPU_FREQ 136 struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu); 137 struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); 138 void cpufreq_cpu_put(struct cpufreq_policy *policy); 139 #else 140 static inline struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu) 141 { 142 return NULL; 143 } 144 static inline struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) 145 { 146 return NULL; 147 } 148 static inline void cpufreq_cpu_put(struct cpufreq_policy *policy) { } 149 #endif 150 151 static inline bool policy_is_shared(struct cpufreq_policy *policy) 152 { 153 return cpumask_weight(policy->cpus) > 1; 154 } 155 156 /* /sys/devices/system/cpu/cpufreq: entry point for global variables */ 157 extern struct kobject *cpufreq_global_kobject; 158 159 #ifdef CONFIG_CPU_FREQ 160 unsigned int cpufreq_get(unsigned int cpu); 161 unsigned int cpufreq_quick_get(unsigned int cpu); 162 unsigned int cpufreq_quick_get_max(unsigned int cpu); 163 void disable_cpufreq(void); 164 165 u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy); 166 int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); 167 int cpufreq_update_policy(unsigned int cpu); 168 bool have_governor_per_policy(void); 169 struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy); 170 void cpufreq_enable_fast_switch(struct cpufreq_policy *policy); 171 void cpufreq_disable_fast_switch(struct cpufreq_policy *policy); 172 #else 173 static inline unsigned int cpufreq_get(unsigned int cpu) 174 { 175 return 0; 176 } 177 static inline unsigned int cpufreq_quick_get(unsigned int cpu) 178 { 179 return 0; 180 } 181 static inline unsigned int cpufreq_quick_get_max(unsigned int cpu) 182 { 183 return 0; 184 } 185 static inline void disable_cpufreq(void) { } 186 #endif 187 188 /********************************************************************* 189 * CPUFREQ DRIVER INTERFACE * 190 *********************************************************************/ 191 192 #define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ 193 #define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ 194 #define CPUFREQ_RELATION_C 2 /* closest frequency to target */ 195 196 struct freq_attr { 197 struct attribute attr; 198 ssize_t (*show)(struct cpufreq_policy *, char *); 199 ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); 200 }; 201 202 #define cpufreq_freq_attr_ro(_name) \ 203 static struct freq_attr _name = \ 204 __ATTR(_name, 0444, show_##_name, NULL) 205 206 #define cpufreq_freq_attr_ro_perm(_name, _perm) \ 207 static struct freq_attr _name = \ 208 __ATTR(_name, _perm, show_##_name, NULL) 209 210 #define cpufreq_freq_attr_rw(_name) \ 211 static struct freq_attr _name = \ 212 __ATTR(_name, 0644, show_##_name, store_##_name) 213 214 struct global_attr { 215 struct attribute attr; 216 ssize_t (*show)(struct kobject *kobj, 217 struct attribute *attr, char *buf); 218 ssize_t (*store)(struct kobject *a, struct attribute *b, 219 const char *c, size_t count); 220 }; 221 222 #define define_one_global_ro(_name) \ 223 static struct global_attr _name = \ 224 __ATTR(_name, 0444, show_##_name, NULL) 225 226 #define define_one_global_rw(_name) \ 227 static struct global_attr _name = \ 228 __ATTR(_name, 0644, show_##_name, store_##_name) 229 230 231 struct cpufreq_driver { 232 char name[CPUFREQ_NAME_LEN]; 233 u8 flags; 234 void *driver_data; 235 236 /* needed by all drivers */ 237 int (*init)(struct cpufreq_policy *policy); 238 int (*verify)(struct cpufreq_policy *policy); 239 240 /* define one out of two */ 241 int (*setpolicy)(struct cpufreq_policy *policy); 242 243 /* 244 * On failure, should always restore frequency to policy->restore_freq 245 * (i.e. old freq). 246 */ 247 int (*target)(struct cpufreq_policy *policy, 248 unsigned int target_freq, 249 unsigned int relation); /* Deprecated */ 250 int (*target_index)(struct cpufreq_policy *policy, 251 unsigned int index); 252 unsigned int (*fast_switch)(struct cpufreq_policy *policy, 253 unsigned int target_freq); 254 /* 255 * Only for drivers with target_index() and CPUFREQ_ASYNC_NOTIFICATION 256 * unset. 257 * 258 * get_intermediate should return a stable intermediate frequency 259 * platform wants to switch to and target_intermediate() should set CPU 260 * to to that frequency, before jumping to the frequency corresponding 261 * to 'index'. Core will take care of sending notifications and driver 262 * doesn't have to handle them in target_intermediate() or 263 * target_index(). 264 * 265 * Drivers can return '0' from get_intermediate() in case they don't 266 * wish to switch to intermediate frequency for some target frequency. 267 * In that case core will directly call ->target_index(). 268 */ 269 unsigned int (*get_intermediate)(struct cpufreq_policy *policy, 270 unsigned int index); 271 int (*target_intermediate)(struct cpufreq_policy *policy, 272 unsigned int index); 273 274 /* should be defined, if possible */ 275 unsigned int (*get)(unsigned int cpu); 276 277 /* optional */ 278 int (*bios_limit)(int cpu, unsigned int *limit); 279 280 int (*exit)(struct cpufreq_policy *policy); 281 void (*stop_cpu)(struct cpufreq_policy *policy); 282 int (*suspend)(struct cpufreq_policy *policy); 283 int (*resume)(struct cpufreq_policy *policy); 284 285 /* Will be called after the driver is fully initialized */ 286 void (*ready)(struct cpufreq_policy *policy); 287 288 struct freq_attr **attr; 289 290 /* platform specific boost support code */ 291 bool boost_enabled; 292 int (*set_boost)(int state); 293 }; 294 295 /* flags */ 296 #define CPUFREQ_STICKY (1 << 0) /* driver isn't removed even if 297 all ->init() calls failed */ 298 #define CPUFREQ_CONST_LOOPS (1 << 1) /* loops_per_jiffy or other 299 kernel "constants" aren't 300 affected by frequency 301 transitions */ 302 #define CPUFREQ_PM_NO_WARN (1 << 2) /* don't warn on suspend/resume 303 speed mismatches */ 304 305 /* 306 * This should be set by platforms having multiple clock-domains, i.e. 307 * supporting multiple policies. With this sysfs directories of governor would 308 * be created in cpu/cpu<num>/cpufreq/ directory and so they can use the same 309 * governor with different tunables for different clusters. 310 */ 311 #define CPUFREQ_HAVE_GOVERNOR_PER_POLICY (1 << 3) 312 313 /* 314 * Driver will do POSTCHANGE notifications from outside of their ->target() 315 * routine and so must set cpufreq_driver->flags with this flag, so that core 316 * can handle them specially. 317 */ 318 #define CPUFREQ_ASYNC_NOTIFICATION (1 << 4) 319 320 /* 321 * Set by drivers which want cpufreq core to check if CPU is running at a 322 * frequency present in freq-table exposed by the driver. For these drivers if 323 * CPU is found running at an out of table freq, we will try to set it to a freq 324 * from the table. And if that fails, we will stop further boot process by 325 * issuing a BUG_ON(). 326 */ 327 #define CPUFREQ_NEED_INITIAL_FREQ_CHECK (1 << 5) 328 329 int cpufreq_register_driver(struct cpufreq_driver *driver_data); 330 int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); 331 332 const char *cpufreq_get_current_driver(void); 333 void *cpufreq_get_driver_data(void); 334 335 static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, 336 unsigned int min, unsigned int max) 337 { 338 if (policy->min < min) 339 policy->min = min; 340 if (policy->max < min) 341 policy->max = min; 342 if (policy->min > max) 343 policy->min = max; 344 if (policy->max > max) 345 policy->max = max; 346 if (policy->min > policy->max) 347 policy->min = policy->max; 348 return; 349 } 350 351 static inline void 352 cpufreq_verify_within_cpu_limits(struct cpufreq_policy *policy) 353 { 354 cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, 355 policy->cpuinfo.max_freq); 356 } 357 358 #ifdef CONFIG_CPU_FREQ 359 void cpufreq_suspend(void); 360 void cpufreq_resume(void); 361 int cpufreq_generic_suspend(struct cpufreq_policy *policy); 362 #else 363 static inline void cpufreq_suspend(void) {} 364 static inline void cpufreq_resume(void) {} 365 #endif 366 367 /********************************************************************* 368 * CPUFREQ NOTIFIER INTERFACE * 369 *********************************************************************/ 370 371 #define CPUFREQ_TRANSITION_NOTIFIER (0) 372 #define CPUFREQ_POLICY_NOTIFIER (1) 373 374 /* Transition notifiers */ 375 #define CPUFREQ_PRECHANGE (0) 376 #define CPUFREQ_POSTCHANGE (1) 377 378 /* Policy Notifiers */ 379 #define CPUFREQ_ADJUST (0) 380 #define CPUFREQ_NOTIFY (1) 381 #define CPUFREQ_START (2) 382 #define CPUFREQ_CREATE_POLICY (3) 383 #define CPUFREQ_REMOVE_POLICY (4) 384 385 #ifdef CONFIG_CPU_FREQ 386 int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); 387 int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); 388 389 void cpufreq_freq_transition_begin(struct cpufreq_policy *policy, 390 struct cpufreq_freqs *freqs); 391 void cpufreq_freq_transition_end(struct cpufreq_policy *policy, 392 struct cpufreq_freqs *freqs, int transition_failed); 393 394 #else /* CONFIG_CPU_FREQ */ 395 static inline int cpufreq_register_notifier(struct notifier_block *nb, 396 unsigned int list) 397 { 398 return 0; 399 } 400 static inline int cpufreq_unregister_notifier(struct notifier_block *nb, 401 unsigned int list) 402 { 403 return 0; 404 } 405 #endif /* !CONFIG_CPU_FREQ */ 406 407 /** 408 * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch 409 * safe) 410 * @old: old value 411 * @div: divisor 412 * @mult: multiplier 413 * 414 * 415 * new = old * mult / div 416 */ 417 static inline unsigned long cpufreq_scale(unsigned long old, u_int div, 418 u_int mult) 419 { 420 #if BITS_PER_LONG == 32 421 u64 result = ((u64) old) * ((u64) mult); 422 do_div(result, div); 423 return (unsigned long) result; 424 425 #elif BITS_PER_LONG == 64 426 unsigned long result = old * ((u64) mult); 427 result /= div; 428 return result; 429 #endif 430 } 431 432 /********************************************************************* 433 * CPUFREQ GOVERNORS * 434 *********************************************************************/ 435 436 /* 437 * If (cpufreq_driver->target) exists, the ->governor decides what frequency 438 * within the limits is used. If (cpufreq_driver->setpolicy> exists, these 439 * two generic policies are available: 440 */ 441 #define CPUFREQ_POLICY_POWERSAVE (1) 442 #define CPUFREQ_POLICY_PERFORMANCE (2) 443 444 /* 445 * The polling frequency depends on the capability of the processor. Default 446 * polling frequency is 1000 times the transition latency of the processor. The 447 * ondemand governor will work on any processor with transition latency <= 10ms, 448 * using appropriate sampling rate. 449 * 450 * For CPUs with transition latency > 10ms (mostly drivers with CPUFREQ_ETERNAL) 451 * the ondemand governor will not work. All times here are in us (microseconds). 452 */ 453 #define MIN_SAMPLING_RATE_RATIO (2) 454 #define LATENCY_MULTIPLIER (1000) 455 #define MIN_LATENCY_MULTIPLIER (20) 456 #define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000) 457 458 /* Governor Events */ 459 #define CPUFREQ_GOV_START 1 460 #define CPUFREQ_GOV_STOP 2 461 #define CPUFREQ_GOV_LIMITS 3 462 #define CPUFREQ_GOV_POLICY_INIT 4 463 #define CPUFREQ_GOV_POLICY_EXIT 5 464 465 struct cpufreq_governor { 466 char name[CPUFREQ_NAME_LEN]; 467 int initialized; 468 int (*governor) (struct cpufreq_policy *policy, 469 unsigned int event); 470 ssize_t (*show_setspeed) (struct cpufreq_policy *policy, 471 char *buf); 472 int (*store_setspeed) (struct cpufreq_policy *policy, 473 unsigned int freq); 474 unsigned int max_transition_latency; /* HW must be able to switch to 475 next freq faster than this value in nano secs or we 476 will fallback to performance governor */ 477 struct list_head governor_list; 478 struct module *owner; 479 }; 480 481 /* Pass a target to the cpufreq driver */ 482 unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy, 483 unsigned int target_freq); 484 int cpufreq_driver_target(struct cpufreq_policy *policy, 485 unsigned int target_freq, 486 unsigned int relation); 487 int __cpufreq_driver_target(struct cpufreq_policy *policy, 488 unsigned int target_freq, 489 unsigned int relation); 490 int cpufreq_register_governor(struct cpufreq_governor *governor); 491 void cpufreq_unregister_governor(struct cpufreq_governor *governor); 492 493 struct cpufreq_governor *cpufreq_default_governor(void); 494 struct cpufreq_governor *cpufreq_fallback_governor(void); 495 496 /* Governor attribute set */ 497 struct gov_attr_set { 498 struct kobject kobj; 499 struct list_head policy_list; 500 struct mutex update_lock; 501 int usage_count; 502 }; 503 504 /* sysfs ops for cpufreq governors */ 505 extern const struct sysfs_ops governor_sysfs_ops; 506 507 void gov_attr_set_init(struct gov_attr_set *attr_set, struct list_head *list_node); 508 void gov_attr_set_get(struct gov_attr_set *attr_set, struct list_head *list_node); 509 unsigned int gov_attr_set_put(struct gov_attr_set *attr_set, struct list_head *list_node); 510 511 /* Governor sysfs attribute */ 512 struct governor_attr { 513 struct attribute attr; 514 ssize_t (*show)(struct gov_attr_set *attr_set, char *buf); 515 ssize_t (*store)(struct gov_attr_set *attr_set, const char *buf, 516 size_t count); 517 }; 518 519 /********************************************************************* 520 * FREQUENCY TABLE HELPERS * 521 *********************************************************************/ 522 523 /* Special Values of .frequency field */ 524 #define CPUFREQ_ENTRY_INVALID ~0u 525 #define CPUFREQ_TABLE_END ~1u 526 /* Special Values of .flags field */ 527 #define CPUFREQ_BOOST_FREQ (1 << 0) 528 529 struct cpufreq_frequency_table { 530 unsigned int flags; 531 unsigned int driver_data; /* driver specific data, not used by core */ 532 unsigned int frequency; /* kHz - doesn't need to be in ascending 533 * order */ 534 }; 535 536 #if defined(CONFIG_CPU_FREQ) && defined(CONFIG_PM_OPP) 537 int dev_pm_opp_init_cpufreq_table(struct device *dev, 538 struct cpufreq_frequency_table **table); 539 void dev_pm_opp_free_cpufreq_table(struct device *dev, 540 struct cpufreq_frequency_table **table); 541 #else 542 static inline int dev_pm_opp_init_cpufreq_table(struct device *dev, 543 struct cpufreq_frequency_table 544 **table) 545 { 546 return -EINVAL; 547 } 548 549 static inline void dev_pm_opp_free_cpufreq_table(struct device *dev, 550 struct cpufreq_frequency_table 551 **table) 552 { 553 } 554 #endif 555 556 /* 557 * cpufreq_for_each_entry - iterate over a cpufreq_frequency_table 558 * @pos: the cpufreq_frequency_table * to use as a loop cursor. 559 * @table: the cpufreq_frequency_table * to iterate over. 560 */ 561 562 #define cpufreq_for_each_entry(pos, table) \ 563 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) 564 565 /* 566 * cpufreq_for_each_valid_entry - iterate over a cpufreq_frequency_table 567 * excluding CPUFREQ_ENTRY_INVALID frequencies. 568 * @pos: the cpufreq_frequency_table * to use as a loop cursor. 569 * @table: the cpufreq_frequency_table * to iterate over. 570 */ 571 572 #define cpufreq_for_each_valid_entry(pos, table) \ 573 for (pos = table; pos->frequency != CPUFREQ_TABLE_END; pos++) \ 574 if (pos->frequency == CPUFREQ_ENTRY_INVALID) \ 575 continue; \ 576 else 577 578 int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, 579 struct cpufreq_frequency_table *table); 580 581 int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, 582 struct cpufreq_frequency_table *table); 583 int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy); 584 585 int cpufreq_frequency_table_target(struct cpufreq_policy *policy, 586 struct cpufreq_frequency_table *table, 587 unsigned int target_freq, 588 unsigned int relation, 589 unsigned int *index); 590 int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy, 591 unsigned int freq); 592 593 ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf); 594 595 #ifdef CONFIG_CPU_FREQ 596 int cpufreq_boost_trigger_state(int state); 597 int cpufreq_boost_enabled(void); 598 int cpufreq_enable_boost_support(void); 599 bool policy_has_boost_freq(struct cpufreq_policy *policy); 600 #else 601 static inline int cpufreq_boost_trigger_state(int state) 602 { 603 return 0; 604 } 605 static inline int cpufreq_boost_enabled(void) 606 { 607 return 0; 608 } 609 610 static inline int cpufreq_enable_boost_support(void) 611 { 612 return -EINVAL; 613 } 614 615 static inline bool policy_has_boost_freq(struct cpufreq_policy *policy) 616 { 617 return false; 618 } 619 #endif 620 /* the following funtion is for cpufreq core use only */ 621 struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu); 622 623 /* the following are really really optional */ 624 extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; 625 extern struct freq_attr cpufreq_freq_attr_scaling_boost_freqs; 626 extern struct freq_attr *cpufreq_generic_attr[]; 627 int cpufreq_table_validate_and_show(struct cpufreq_policy *policy, 628 struct cpufreq_frequency_table *table); 629 630 unsigned int cpufreq_generic_get(unsigned int cpu); 631 int cpufreq_generic_init(struct cpufreq_policy *policy, 632 struct cpufreq_frequency_table *table, 633 unsigned int transition_latency); 634 #endif /* _LINUX_CPUFREQ_H */ 635