1 /* 2 * SYS/THREAD.H 3 * 4 * Implements the architecture independant portion of the LWKT 5 * subsystem. 6 */ 7 8 #ifndef _SYS_THREAD_H_ 9 #define _SYS_THREAD_H_ 10 11 #ifndef _SYS_PARAM_H_ 12 #include <sys/param.h> /* MAXCOMLEN */ 13 #endif 14 #ifndef _SYS_QUEUE_H_ 15 #include <sys/queue.h> /* TAILQ_* macros */ 16 #endif 17 #ifndef _SYS_MSGPORT_H_ 18 #include <sys/msgport.h> /* lwkt_port */ 19 #endif 20 #ifndef _SYS_TIME_H_ 21 #include <sys/time.h> /* struct timeval */ 22 #endif 23 #ifndef _SYS_LOCK_H 24 #include <sys/lock.h> 25 #endif 26 #ifndef _SYS_SPINLOCK_H_ 27 #include <sys/spinlock.h> 28 #endif 29 #ifndef _SYS_IOSCHED_H_ 30 #include <sys/iosched.h> 31 #endif 32 #include <machine/thread.h> /* md_thread */ 33 #include <machine/stdint.h> 34 #include <machine/ucontext.h> 35 36 struct globaldata; 37 struct lwp; 38 struct proc; 39 struct thread; 40 struct lwkt_queue; 41 struct lwkt_token; 42 struct lwkt_tokref; 43 struct lwkt_ipiq; 44 #if 0 45 struct lwkt_cpu_msg; 46 struct lwkt_cpu_port; 47 #endif 48 struct lwkt_cpusync; 49 struct fdnode; 50 union sysunion; 51 52 struct sleepqueue_wchan; 53 54 typedef struct lwkt_queue *lwkt_queue_t; 55 typedef struct lwkt_token *lwkt_token_t; 56 typedef struct lwkt_tokref *lwkt_tokref_t; 57 #if 0 58 typedef struct lwkt_cpu_msg *lwkt_cpu_msg_t; 59 typedef struct lwkt_cpu_port *lwkt_cpu_port_t; 60 #endif 61 typedef struct lwkt_ipiq *lwkt_ipiq_t; 62 typedef struct lwkt_cpusync *lwkt_cpusync_t; 63 typedef struct thread *thread_t; 64 65 typedef TAILQ_HEAD(lwkt_queue, thread) lwkt_queue; 66 67 /* 68 * Differentiation between kernel threads and user threads. Userland 69 * programs which want to access to kernel structures have to define 70 * _KERNEL_STRUCTURES. This is a kinda safety valve to prevent badly 71 * written user programs from getting an LWKT thread that is neither the 72 * kernel nor the user version. 73 */ 74 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 75 #ifndef _SYS_CPUMASK_H_ 76 #include <sys/cpumask.h> /* cpumask_t */ 77 #endif 78 #ifndef _CPU_FRAME_H_ 79 #include <machine/frame.h> 80 #endif 81 #else 82 struct intrframe; 83 #endif 84 85 /* 86 * Tokens are used to serialize access to information. They are 'soft' 87 * serialization entities that only stay in effect while a thread is 88 * running. If the thread blocks, other threads can run holding the same 89 * token(s). The tokens are reacquired when the original thread resumes. 90 * 91 * Tokens guarantee that no deadlock can happen regardless of type or 92 * ordering. However, obtaining the same token first shared, then 93 * stacking exclusive, is not allowed and will panic. 94 * 95 * A thread can depend on its serialization remaining intact through a 96 * preemption. An interrupt which attempts to use the same token as the 97 * thread being preempted will reschedule itself for non-preemptive 98 * operation, so the new token code is capable of interlocking against 99 * interrupts as well as other cpus. This means that your token can only 100 * be (temporarily) lost if you *explicitly* block. 101 * 102 * Tokens are managed through a helper reference structure, lwkt_tokref. Each 103 * thread has a stack of tokref's to keep track of acquired tokens. Multiple 104 * tokref's may reference the same token. 105 * 106 * EXCLUSIVE TOKENS 107 * Acquiring an exclusive token requires acquiring the EXCLUSIVE bit 108 * with count == 0. If the exclusive bit cannot be acquired, EXCLREQ 109 * is set. Once acquired, EXCLREQ is cleared (but could get set by 110 * another thread also trying for an exclusive lock at any time). 111 * 112 * SHARED TOKENS 113 * Acquiring a shared token requires waiting for the EXCLUSIVE bit 114 * to be cleared and then acquiring a count. A shared lock request 115 * can temporarily acquire a count and then back it out if it is 116 * unable to obtain the EXCLUSIVE bit, allowing fetchadd to be used. 117 * 118 * A thread attempting to get a single shared token will defer to 119 * pending exclusive requesters. However, a thread already holding 120 * one or more tokens and trying to get an additional shared token 121 * cannot defer to exclusive requesters because doing so can lead 122 * to a deadlock. 123 * 124 * Multiple exclusive tokens are handled by treating the additional tokens 125 * as a special case of the shared token, incrementing the count value. This 126 * reduces the complexity of the token release code. 127 */ 128 129 struct lwkt_token { 130 long t_count; /* Shared/exclreq/exclusive access */ 131 struct lwkt_tokref *t_ref; /* Exclusive ref */ 132 long t_collisions; /* Collision counter */ 133 const char *t_desc; /* Descriptive name */ 134 }; 135 136 #define TOK_EXCLUSIVE 0x00000001 /* Exclusive lock held */ 137 #define TOK_EXCLREQ 0x00000002 /* Exclusive request pending */ 138 #define TOK_INCR 4 /* Shared count increment */ 139 #define TOK_COUNTMASK (~(long)(TOK_EXCLUSIVE|TOK_EXCLREQ)) 140 141 /* 142 * Static initialization for a lwkt_token. 143 */ 144 #define LWKT_TOKEN_INITIALIZER(name) \ 145 { \ 146 .t_count = 0, \ 147 .t_ref = NULL, \ 148 .t_collisions = 0, \ 149 .t_desc = #name \ 150 } 151 152 /* 153 * Assert that a particular token is held 154 */ 155 #define LWKT_TOKEN_HELD_ANY(tok) _lwkt_token_held_any(tok, curthread) 156 #define LWKT_TOKEN_HELD_EXCL(tok) _lwkt_token_held_excl(tok, curthread) 157 158 #define ASSERT_LWKT_TOKEN_HELD(tok) \ 159 KKASSERT(LWKT_TOKEN_HELD_ANY(tok)) 160 161 #define ASSERT_LWKT_TOKEN_HELD_EXCL(tok) \ 162 KKASSERT(LWKT_TOKEN_HELD_EXCL(tok)) 163 164 #define ASSERT_NO_TOKENS_HELD(td) \ 165 KKASSERT((td)->td_toks_stop == &td->td_toks_array[0]) 166 167 struct lwkt_tokref { 168 lwkt_token_t tr_tok; /* token in question */ 169 long tr_count; /* TOK_EXCLUSIVE|TOK_EXCLREQ or 0 */ 170 struct thread *tr_owner; /* me */ 171 }; 172 173 #define MAXCPUFIFO 256 /* power of 2 */ 174 #define MAXCPUFIFO_MASK (MAXCPUFIFO - 1) 175 #define LWKT_MAXTOKENS 32 /* max tokens beneficially held by thread */ 176 177 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 178 /* 179 * Always cast to ipifunc_t when registering an ipi. The actual ipi function 180 * is called with both the data and an interrupt frame, but the ipi function 181 * that is registered might only declare a data argument. 182 */ 183 typedef void (*ipifunc1_t)(void *arg); 184 typedef void (*ipifunc2_t)(void *arg, int arg2); 185 typedef void (*ipifunc3_t)(void *arg, int arg2, struct intrframe *frame); 186 187 struct lwkt_ipiq { 188 int ip_rindex; /* only written by target cpu */ 189 int ip_xindex; /* written by target, indicates completion */ 190 int ip_windex; /* only written by source cpu */ 191 int ip_drain; /* drain source limit */ 192 struct { 193 ipifunc3_t func; 194 void *arg1; 195 int arg2; 196 char filler[32 - sizeof(int) - sizeof(void *) * 2]; 197 } ip_info[MAXCPUFIFO]; 198 }; 199 200 /* 201 * CPU Synchronization structure. See lwkt_cpusync_init() and 202 * lwkt_cpusync_interlock() for more information. 203 */ 204 typedef void (*cpusync_func_t)(void *arg); 205 206 struct lwkt_cpusync { 207 cpumask_t cs_mask; /* cpus running the sync */ 208 cpumask_t cs_mack; /* mask acknowledge */ 209 cpusync_func_t cs_func; /* function to execute */ 210 void *cs_data; /* function data */ 211 }; 212 #endif /* _KERNEL || _KERNEL_STRUCTURES */ 213 214 /* 215 * The standard message and queue structure used for communications between 216 * cpus. Messages are typically queued via a machine-specific non-linked 217 * FIFO matrix allowing any cpu to send a message to any other cpu without 218 * blocking. 219 */ 220 #if 0 221 typedef struct lwkt_cpu_msg { 222 void (*cm_func)(lwkt_cpu_msg_t msg); /* primary dispatch function */ 223 int cm_code; /* request code if applicable */ 224 int cm_cpu; /* reply to cpu */ 225 thread_t cm_originator; /* originating thread for wakeup */ 226 } lwkt_cpu_msg; 227 #endif 228 229 /* 230 * per-thread file descriptor cache 231 */ 232 struct fdcache { 233 int fd; /* descriptor being cached */ 234 int locked; 235 struct file *fp; /* cached referenced fp */ 236 int lru; 237 int unused[3]; 238 } __cachealign; 239 240 #define NFDCACHE 4 /* max fd's cached by a thread */ 241 242 /* 243 * Thread structure. Note that ownership of a thread structure is special 244 * cased and there is no 'token'. A thread is always owned by the cpu 245 * represented by td_gd, any manipulation of the thread by some other cpu 246 * must be done through cpu_*msg() functions. e.g. you could request 247 * ownership of a thread that way, or hand a thread off to another cpu. 248 * 249 * NOTE: td_ucred is synchronized from the p_ucred on user->kernel syscall, 250 * trap, and AST/signal transitions to provide a stable ucred for 251 * (primarily) system calls. This field will be NULL for pure kernel 252 * threads. 253 */ 254 struct md_intr_info; 255 256 struct thread { 257 TAILQ_ENTRY(thread) td_threadq; 258 TAILQ_ENTRY(thread) td_allq; 259 TAILQ_ENTRY(thread) td_sleepq; 260 lwkt_port td_msgport; /* built-in message port for replies */ 261 struct lwp *td_lwp; /* (optional) associated lwp */ 262 struct proc *td_proc; /* (optional) associated process */ 263 struct pcb *td_pcb; /* points to pcb and top of kstack */ 264 struct globaldata *td_gd; /* associated with this cpu */ 265 const char *td_wmesg; /* string name for blockage */ 266 const volatile void *td_wchan; /* waiting on channel */ 267 int td_pri; /* 0-31, 31=highest priority (note 1) */ 268 int td_critcount; /* critical section priority */ 269 u_int td_flags; /* TDF flags */ 270 int td_wdomain; /* domain for wchan address (typ 0) */ 271 void (*td_preemptable)(struct thread *td, int critcount); 272 void (*td_release)(struct thread *td); 273 char *td_kstack; /* kernel stack */ 274 int td_kstack_size; /* size of kernel stack */ 275 char *td_sp; /* kernel stack pointer for LWKT restore */ 276 thread_t (*td_switch)(struct thread *ntd); 277 __uint64_t td_uticks; /* Statclock hits in user mode (uS) */ 278 __uint64_t td_sticks; /* Statclock hits in system mode (uS) */ 279 __uint64_t td_iticks; /* Statclock hits processing intr (uS) */ 280 int td_locks; /* lockmgr lock debugging */ 281 struct plimit *td_limit; /* synchronized from proc->p_limit */ 282 int td_refs; /* hold position in gd_tdallq / hold free */ 283 int td_nest_count; /* prevent splz nesting */ 284 u_int td_contended; /* token contention count */ 285 u_int td_mpflags; /* flags can be set by foreign cpus */ 286 int td_cscount; /* cpu synchronization master */ 287 int td_wakefromcpu; /* who woke me up? */ 288 int td_upri; /* user priority (sub-priority under td_pri) */ 289 int td_type; /* thread type, TD_TYPE_ */ 290 int td_tracker; /* misc use (base value 0), recursion count */ 291 int td_fdcache_lru; 292 int td_unused03[3]; /* for future fields */ 293 struct iosched_data td_iosdata; /* Dynamic I/O scheduling data */ 294 struct timeval td_start; /* start time for a thread/process */ 295 char td_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */ 296 struct thread *td_preempted; /* we preempted this thread */ 297 struct ucred *td_ucred; /* synchronized from proc->p_ucred */ 298 mcontext_t *td_kfpuctx; /* kernel_fpu_begin()/kernel_fpu_end() */ 299 lwkt_tokref_t td_toks_have; /* tokens we own */ 300 lwkt_tokref_t td_toks_stop; /* tokens we want */ 301 struct lwkt_tokref td_toks_array[LWKT_MAXTOKENS]; 302 int td_fairq_load; /* fairq */ 303 int td_fairq_count; /* fairq */ 304 struct globaldata *td_migrate_gd; /* target gd for thread migration */ 305 struct fdcache td_fdcache[NFDCACHE]; 306 307 /* 308 * Linux and FreeBSD compat fields 309 */ 310 void *td_linux_task; /* drm/linux support */ 311 struct sleepqueue_wchan *td_sqwc; /* freebsd sleepq*() API */ 312 sbintime_t td_sqtimo; /* freebsd sleepq*() API */ 313 int td_sqqueue; /* freebsd sleepq*() API */ 314 315 /* 316 * Debugging 317 */ 318 #ifdef DEBUG_CRIT_SECTIONS 319 #define CRIT_DEBUG_ARRAY_SIZE 32 320 #define CRIT_DEBUG_ARRAY_MASK (CRIT_DEBUG_ARRAY_SIZE - 1) 321 const char *td_crit_debug_array[CRIT_DEBUG_ARRAY_SIZE]; 322 int td_crit_debug_index; 323 int td_in_crit_report; 324 #endif 325 326 /* 327 * machine-specific 328 */ 329 struct md_thread td_mach; 330 331 /* 332 * Debugging 333 */ 334 #ifdef DEBUG_LOCKS 335 #define SPINLOCK_DEBUG_ARRAY_SIZE 32 336 int td_spinlock_stack_id[SPINLOCK_DEBUG_ARRAY_SIZE]; 337 struct spinlock *td_spinlock_stack[SPINLOCK_DEBUG_ARRAY_SIZE]; 338 void *td_spinlock_caller_pc[SPINLOCK_DEBUG_ARRAY_SIZE]; 339 340 /* 341 * Track lockmgr locks held; lk->lk_filename:lk->lk_lineno is the holder 342 */ 343 #define LOCKMGR_DEBUG_ARRAY_SIZE 8 344 int td_lockmgr_stack_id[LOCKMGR_DEBUG_ARRAY_SIZE]; 345 struct lock *td_lockmgr_stack[LOCKMGR_DEBUG_ARRAY_SIZE]; 346 #endif 347 }; 348 349 #define td_toks_base td_toks_array[0] 350 #define td_toks_end td_toks_array[LWKT_MAXTOKENS] 351 352 #define TD_TOKS_HELD(td) ((td)->td_toks_stop != &(td)->td_toks_base) 353 #define TD_TOKS_NOT_HELD(td) ((td)->td_toks_stop == &(td)->td_toks_base) 354 355 /* 356 * Thread flags. Note that TDF_RUNNING is cleared on the old thread after 357 * we switch to the new one, which is necessary because LWKTs don't need 358 * to hold the BGL. This flag is used by the exit code and the managed 359 * thread migration code. Note in addition that preemption will cause 360 * TDF_RUNNING to be cleared temporarily, so any code checking TDF_RUNNING 361 * must also check TDF_PREEMPT_LOCK. 362 * 363 * LWKT threads stay on their (per-cpu) run queue while running, not to 364 * be confused with user processes which are removed from the user scheduling 365 * run queue while actually running. 366 * 367 * td_threadq can represent the thread on one of three queues... the LWKT 368 * run queue, a tsleep queue, or an lwkt blocking queue. The LWKT subsystem 369 * does not allow a thread to be scheduled if it already resides on some 370 * queue. 371 */ 372 #define TDF_RUNNING 0x00000001 /* thread still active */ 373 #define TDF_RUNQ 0x00000002 /* on an LWKT run queue */ 374 #define TDF_PREEMPT_LOCK 0x00000004 /* I have been preempted */ 375 #define TDF_PREEMPT_DONE 0x00000008 /* ac preemption complete */ 376 #define TDF_NOSTART 0x00000010 /* do not schedule on create */ 377 #define TDF_MIGRATING 0x00000020 /* thread is being migrated */ 378 #define TDF_SINTR 0x00000040 /* interruptability for 'ps' */ 379 #define TDF_TSLEEPQ 0x00000080 /* on a tsleep wait queue */ 380 381 #define TDF_SYSTHREAD 0x00000100 /* reserve memory may be used */ 382 #define TDF_ALLOCATED_THREAD 0x00000200 /* objcache allocated thread */ 383 #define TDF_ALLOCATED_STACK 0x00000400 /* objcache allocated stack */ 384 #define TDF_FPU_HEUR 0x00000800 /* active restore on switch */ 385 #define TDF_DEADLKTREAT 0x00001000 /* special lockmgr treatment */ 386 #define TDF_MARKER 0x00002000 /* tdallq list scan marker */ 387 #define TDF_TIMEOUT_RUNNING 0x00004000 /* tsleep timeout race */ 388 #define TDF_TIMEOUT 0x00008000 /* tsleep timeout */ 389 #define TDF_INTTHREAD 0x00010000 /* interrupt thread */ 390 #define TDF_TSLEEP_DESCHEDULED 0x00020000 /* tsleep core deschedule */ 391 #define TDF_BLOCKED 0x00040000 /* Thread is blocked */ 392 #define TDF_PANICWARN 0x00080000 /* panic warning in switch */ 393 #define TDF_BLOCKQ 0x00100000 /* on block queue */ 394 #define TDF_FORCE_SPINPORT 0x00200000 395 #define TDF_EXITING 0x00400000 /* thread exiting */ 396 #define TDF_USINGFP 0x00800000 /* thread using fp coproc */ 397 #define TDF_KERNELFP 0x01000000 /* kernel using fp coproc */ 398 #define TDF_DELAYED_WAKEUP 0x02000000 399 #define TDF_FIXEDCPU 0x04000000 /* running cpu is fixed */ 400 #define TDF_USERMODE 0x08000000 /* in or entering user mode */ 401 #define TDF_NOFAULT 0x10000000 /* force onfault on fault */ 402 #define TDF_CLKTHREAD 0x20000000 /* detect INTTHREAD clock */ 403 404 #define TDF_MP_STOPREQ 0x00000001 /* suspend_kproc */ 405 #define TDF_MP_WAKEREQ 0x00000002 /* resume_kproc */ 406 #define TDF_MP_EXITWAIT 0x00000004 /* reaper, see lwp_wait() */ 407 #define TDF_MP_EXITSIG 0x00000008 /* reaper, see lwp_wait() */ 408 #define TDF_MP_BATCH_DEMARC 0x00000010 /* batch mode handling */ 409 #define TDF_MP_DIDYIELD 0x00000020 /* effects scheduling */ 410 411 #define TD_TYPE_GENERIC 0 /* generic thread */ 412 #define TD_TYPE_CRYPTO 1 /* crypto thread */ 413 #define TD_TYPE_NETISR 2 /* netisr thread */ 414 415 /* 416 * Thread priorities. Typically only one thread from any given 417 * user process scheduling queue is on the LWKT run queue at a time. 418 * Remember that there is one LWKT run queue per cpu. 419 * 420 * Critical sections are handled by bumping td_pri above TDPRI_MAX, which 421 * causes interrupts to be masked as they occur. When this occurs a 422 * rollup flag will be set in mycpu->gd_reqflags. 423 */ 424 #define TDPRI_IDLE_THREAD 0 /* the idle thread */ 425 #define TDPRI_IDLE_WORK 1 /* idle work (page zero, etc) */ 426 #define TDPRI_USER_SCHEDULER 2 /* user scheduler helper */ 427 #define TDPRI_USER_IDLE 4 /* user scheduler idle */ 428 #define TDPRI_USER_NORM 6 /* user scheduler normal */ 429 #define TDPRI_USER_REAL 8 /* user scheduler real time */ 430 #define TDPRI_KERN_LPSCHED 9 /* (comparison point only) */ 431 #define TDPRI_KERN_USER 10 /* kernel / block in syscall */ 432 #define TDPRI_KERN_DAEMON 12 /* kernel daemon (pageout, etc) */ 433 #define TDPRI_SOFT_NORM 14 /* kernel / normal */ 434 #define TDPRI_SOFT_TIMER 16 /* kernel / timer */ 435 #define TDPRI_UNUSED19 19 436 #define TDPRI_INT_SUPPORT 20 /* kernel / high priority support */ 437 #define TDPRI_INT_LOW 27 /* low priority interrupt */ 438 #define TDPRI_INT_MED 28 /* medium priority interrupt */ 439 #define TDPRI_INT_HIGH 29 /* high priority interrupt */ 440 #define TDPRI_MAX 31 441 442 #define LWKT_THREAD_STACK (UPAGES * PAGE_SIZE) 443 444 #define IN_CRITICAL_SECT(td) ((td)->td_critcount) 445 446 #ifdef _KERNEL 447 448 extern void (*linux_task_drop_callback)(struct thread *); 449 extern void (*linux_proc_drop_callback)(struct proc *); 450 451 /* 452 * Global tokens 453 */ 454 extern struct lwkt_token mp_token; 455 extern struct lwkt_token pmap_token; 456 extern struct lwkt_token dev_token; 457 extern struct lwkt_token vm_token; 458 extern struct lwkt_token vmspace_token; 459 extern struct lwkt_token kvm_token; 460 extern struct lwkt_token sigio_token; 461 extern struct lwkt_token tty_token; 462 extern struct lwkt_token vnode_token; 463 extern struct lwkt_token revoke_token; 464 extern struct lwkt_token kbd_token; 465 extern struct lwkt_token vga_token; 466 467 /* 468 * Procedures 469 */ 470 struct thread *lwkt_alloc_thread(struct thread *, int, int, int); 471 void lwkt_init_thread(struct thread *, void *, int, int, struct globaldata *); 472 void lwkt_set_interrupt_support_thread(void); 473 void lwkt_set_comm(thread_t, const char *, ...) __printflike(2, 3); 474 void lwkt_free_thread(struct thread *); 475 void lwkt_gdinit(struct globaldata *); 476 void lwkt_switch(void); 477 void lwkt_switch_return(struct thread *); 478 void lwkt_preempt(thread_t, int); 479 void lwkt_schedule(thread_t); 480 void lwkt_schedule_noresched(thread_t); 481 void lwkt_schedule_self(thread_t); 482 void lwkt_deschedule(thread_t); 483 void lwkt_deschedule_self(thread_t); 484 void lwkt_yield(void); 485 void lwkt_yield_quick(void); 486 void lwkt_user_yield(void); 487 void lwkt_hold(thread_t); 488 void lwkt_rele(thread_t); 489 void lwkt_passive_release(thread_t); 490 void lwkt_maybe_splz(thread_t); 491 492 void lwkt_gettoken(lwkt_token_t); 493 void lwkt_gettoken_shared(lwkt_token_t); 494 int lwkt_trytoken(lwkt_token_t); 495 void lwkt_reltoken(lwkt_token_t); 496 int lwkt_cnttoken(lwkt_token_t, thread_t); 497 int lwkt_getalltokens(thread_t, int); 498 void lwkt_relalltokens(thread_t); 499 void lwkt_token_init(lwkt_token_t, const char *); 500 void lwkt_token_uninit(lwkt_token_t); 501 502 void lwkt_token_pool_init(void); 503 lwkt_token_t lwkt_token_pool_lookup(void *); 504 lwkt_token_t lwkt_getpooltoken(void *); 505 void lwkt_relpooltoken(void *); 506 507 void lwkt_token_swap(void); 508 509 void lwkt_setpri(thread_t, int); 510 void lwkt_setpri_initial(thread_t, int); 511 void lwkt_setpri_self(int); 512 void lwkt_schedulerclock(thread_t td); 513 void lwkt_setcpu_self(struct globaldata *); 514 void lwkt_migratecpu(int); 515 516 void lwkt_giveaway(struct thread *); 517 void lwkt_acquire(struct thread *); 518 int lwkt_send_ipiq3(struct globaldata *, ipifunc3_t, void *, int); 519 int lwkt_send_ipiq3_passive(struct globaldata *, ipifunc3_t, void *, int); 520 int lwkt_send_ipiq3_bycpu(int, ipifunc3_t, void *, int); 521 int lwkt_send_ipiq3_mask(cpumask_t, ipifunc3_t, void *, int); 522 void lwkt_wait_ipiq(struct globaldata *, int); 523 void lwkt_process_ipiq(void); 524 void lwkt_process_ipiq_frame(struct intrframe *); 525 void lwkt_smp_stopped(void); 526 void lwkt_synchronize_ipiqs(const char *); 527 528 /* lwkt_cpusync_init() - inline function in sys/thread2.h */ 529 void lwkt_cpusync_simple(cpumask_t, cpusync_func_t, void *); 530 void lwkt_cpusync_interlock(lwkt_cpusync_t); 531 void lwkt_cpusync_deinterlock(lwkt_cpusync_t); 532 void lwkt_cpusync_quick(lwkt_cpusync_t); 533 534 void crit_panic(void) __dead2; 535 struct lwp *lwkt_preempted_proc(void); 536 537 int lwkt_create(void (*)(void *), void *, struct thread **, struct thread *, 538 int, int, const char *, ...) __printflike(7, 8); 539 void lwkt_exit(void) __dead2; 540 void lwkt_remove_tdallq(struct thread *); 541 542 #endif /* _KERNEL */ 543 544 #endif /* !_SYS_THREAD_H_ */ 545 546