| 1 | /* |
| 2 | * SYS/THREAD.H |
| 3 | * |
| 4 | * Implements the architecture independant portion of the LWKT |
| 5 | * subsystem. |
| 6 | * |
| 7 | * Types which must already be defined when this header is included by |
| 8 | * userland: struct md_thread |
| 9 | */ |
| 10 | |
| 11 | #ifndef _SYS_THREAD_H_ |
| 12 | #define _SYS_THREAD_H_ |
| 13 | |
| 14 | #ifndef _SYS_STDINT_H_ |
| 15 | #include <sys/stdint.h> /* __int types */ |
| 16 | #endif |
| 17 | #ifndef _SYS_PARAM_H_ |
| 18 | #include <sys/param.h> /* MAXCOMLEN */ |
| 19 | #endif |
| 20 | #ifndef _SYS_QUEUE_H_ |
| 21 | #include <sys/queue.h> /* TAILQ_* macros */ |
| 22 | #endif |
| 23 | #ifndef _SYS_MSGPORT_H_ |
| 24 | #include <sys/msgport.h> /* lwkt_port */ |
| 25 | #endif |
| 26 | #ifndef _SYS_TIME_H_ |
| 27 | #include <sys/time.h> /* struct timeval */ |
| 28 | #endif |
| 29 | #ifndef _SYS_LOCK_H |
| 30 | #include <sys/lock.h> |
| 31 | #endif |
| 32 | #ifndef _SYS_SPINLOCK_H_ |
| 33 | #include <sys/spinlock.h> |
| 34 | #endif |
| 35 | #ifndef _SYS_IOSCHED_H_ |
| 36 | #include <sys/iosched.h> |
| 37 | #endif |
| 38 | #include <machine/thread.h> |
| 39 | |
| 40 | struct globaldata; |
| 41 | struct lwp; |
| 42 | struct proc; |
| 43 | struct thread; |
| 44 | struct lwkt_queue; |
| 45 | struct lwkt_token; |
| 46 | struct lwkt_tokref; |
| 47 | struct lwkt_ipiq; |
| 48 | struct lwkt_cpu_msg; |
| 49 | struct lwkt_cpu_port; |
| 50 | struct lwkt_cpusync; |
| 51 | union sysunion; |
| 52 | |
| 53 | typedef struct lwkt_queue *lwkt_queue_t; |
| 54 | typedef struct lwkt_token *lwkt_token_t; |
| 55 | typedef struct lwkt_tokref *lwkt_tokref_t; |
| 56 | typedef struct lwkt_cpu_msg *lwkt_cpu_msg_t; |
| 57 | typedef struct lwkt_cpu_port *lwkt_cpu_port_t; |
| 58 | typedef struct lwkt_ipiq *lwkt_ipiq_t; |
| 59 | typedef struct lwkt_cpusync *lwkt_cpusync_t; |
| 60 | typedef struct thread *thread_t; |
| 61 | |
| 62 | typedef TAILQ_HEAD(lwkt_queue, thread) lwkt_queue; |
| 63 | |
| 64 | /* |
| 65 | * Differentiation between kernel threads and user threads. Userland |
| 66 | * programs which want to access to kernel structures have to define |
| 67 | * _KERNEL_STRUCTURES. This is a kinda safety valve to prevent badly |
| 68 | * written user programs from getting an LWKT thread that is neither the |
| 69 | * kernel nor the user version. |
| 70 | */ |
| 71 | #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) |
| 72 | #ifndef _MACHINE_THREAD_H_ |
| 73 | #include <machine/thread.h> /* md_thread */ |
| 74 | #endif |
| 75 | #ifndef _MACHINE_FRAME_H_ |
| 76 | #include <machine/frame.h> |
| 77 | #endif |
| 78 | #else |
| 79 | struct intrframe; |
| 80 | #endif |
| 81 | |
| 82 | /* |
| 83 | * Tokens are used to serialize access to information. They are 'soft' |
| 84 | * serialization entities that only stay in effect while a thread is |
| 85 | * running. If the thread blocks, other threads can run holding the same |
| 86 | * token(s). The tokens are reacquired when the original thread resumes. |
| 87 | * |
| 88 | * A thread can depend on its serialization remaining intact through a |
| 89 | * preemption. An interrupt which attempts to use the same token as the |
| 90 | * thread being preempted will reschedule itself for non-preemptive |
| 91 | * operation, so the new token code is capable of interlocking against |
| 92 | * interrupts as well as other cpus. This means that your token can only |
| 93 | * be (temporarily) lost if you *explicitly* block. |
| 94 | * |
| 95 | * Tokens are managed through a helper reference structure, lwkt_tokref. Each |
| 96 | * thread has a stack of tokref's to keep track of acquired tokens. Multiple |
| 97 | * tokref's may reference the same token. |
| 98 | * |
| 99 | * Tokens can be held shared or exclusive. An exclusive holder is able |
| 100 | * to set the TOK_EXCLUSIVE bit in t_count as long as no bit in the count |
| 101 | * mask is set. If unable to accomplish this TOK_EXCLREQ can be set instead |
| 102 | * which prevents any new shared acquisitions while the exclusive requestor |
| 103 | * spins in the scheduler. A shared holder can bump t_count by the increment |
| 104 | * value as long as neither TOK_EXCLUSIVE or TOK_EXCLREQ is set, else spin |
| 105 | * in the scheduler. |
| 106 | * |
| 107 | * Multiple exclusive tokens are handled by treating the additional tokens |
| 108 | * as a special case of the shared token, incrementing the count value. This |
| 109 | * reduces the complexity of the token release code. |
| 110 | */ |
| 111 | |
| 112 | typedef struct lwkt_token { |
| 113 | long t_count; /* Shared/exclreq/exclusive access */ |
| 114 | struct lwkt_tokref *t_ref; /* Exclusive ref */ |
| 115 | long t_collisions; /* Collision counter */ |
| 116 | const char *t_desc; /* Descriptive name */ |
| 117 | } lwkt_token; |
| 118 | |
| 119 | #define TOK_EXCLUSIVE 0x00000001 /* Exclusive lock held */ |
| 120 | #define TOK_EXCLREQ 0x00000002 /* Exclusive request pending */ |
| 121 | #define TOK_INCR 4 /* Shared count increment */ |
| 122 | #define TOK_COUNTMASK (~(long)(TOK_EXCLUSIVE|TOK_EXCLREQ)) |
| 123 | |
| 124 | /* |
| 125 | * Static initialization for a lwkt_token. |
| 126 | */ |
| 127 | #define LWKT_TOKEN_INITIALIZER(name) \ |
| 128 | { \ |
| 129 | .t_count = 0, \ |
| 130 | .t_ref = NULL, \ |
| 131 | .t_collisions = 0, \ |
| 132 | .t_desc = #name \ |
| 133 | } |
| 134 | |
| 135 | /* |
| 136 | * Assert that a particular token is held |
| 137 | */ |
| 138 | #define LWKT_TOKEN_HELD_ANY(tok) _lwkt_token_held_any(tok, curthread) |
| 139 | #define LWKT_TOKEN_HELD_EXCL(tok) _lwkt_token_held_excl(tok, curthread) |
| 140 | |
| 141 | #define ASSERT_LWKT_TOKEN_HELD(tok) \ |
| 142 | KKASSERT(LWKT_TOKEN_HELD_ANY(tok)) |
| 143 | |
| 144 | #define ASSERT_LWKT_TOKEN_HELD_EXCL(tok) \ |
| 145 | KKASSERT(LWKT_TOKEN_HELD_EXCL(tok)) |
| 146 | |
| 147 | #define ASSERT_NO_TOKENS_HELD(td) \ |
| 148 | KKASSERT((td)->td_toks_stop == &td->td_toks_array[0]) |
| 149 | |
| 150 | /* |
| 151 | * Assert that a particular token is held and we are in a hard |
| 152 | * code execution section (interrupt, ipi, or hard code section). |
| 153 | * Hard code sections are not allowed to block or potentially block. |
| 154 | * e.g. lwkt_gettoken() would only be ok if the token were already |
| 155 | * held. |
| 156 | */ |
| 157 | #define ASSERT_LWKT_TOKEN_HARD(tok) \ |
| 158 | do { \ |
| 159 | globaldata_t zgd __debugvar = mycpu; \ |
| 160 | KKASSERT((tok)->t_ref && \ |
| 161 | (tok)->t_ref->tr_owner == zgd->gd_curthread && \ |
| 162 | zgd->gd_intr_nesting_level > 0); \ |
| 163 | } while(0) |
| 164 | |
| 165 | /* |
| 166 | * Assert that a particular token is held and we are in a normal |
| 167 | * critical section. Critical sections will not be preempted but |
| 168 | * can explicitly block (tsleep, lwkt_gettoken, etc). |
| 169 | */ |
| 170 | #define ASSERT_LWKT_TOKEN_CRIT(tok) \ |
| 171 | do { \ |
| 172 | globaldata_t zgd __debugvar = mycpu; \ |
| 173 | KKASSERT((tok)->t_ref && \ |
| 174 | (tok)->t_ref->tr_owner == zgd->gd_curthread && \ |
| 175 | zgd->gd_curthread->td_critcount > 0); \ |
| 176 | } while(0) |
| 177 | |
| 178 | struct lwkt_tokref { |
| 179 | lwkt_token_t tr_tok; /* token in question */ |
| 180 | long tr_count; /* TOK_EXCLUSIVE|TOK_EXCLREQ or 0 */ |
| 181 | struct thread *tr_owner; /* me */ |
| 182 | }; |
| 183 | |
| 184 | #define MAXCPUFIFO 32 /* power of 2 */ |
| 185 | #define MAXCPUFIFO_MASK (MAXCPUFIFO - 1) |
| 186 | #define LWKT_MAXTOKENS 32 /* max tokens beneficially held by thread */ |
| 187 | |
| 188 | /* |
| 189 | * Always cast to ipifunc_t when registering an ipi. The actual ipi function |
| 190 | * is called with both the data and an interrupt frame, but the ipi function |
| 191 | * that is registered might only declare a data argument. |
| 192 | */ |
| 193 | typedef void (*ipifunc1_t)(void *arg); |
| 194 | typedef void (*ipifunc2_t)(void *arg, int arg2); |
| 195 | typedef void (*ipifunc3_t)(void *arg, int arg2, struct intrframe *frame); |
| 196 | |
| 197 | struct lwkt_ipiq { |
| 198 | int ip_rindex; /* only written by target cpu */ |
| 199 | int ip_xindex; /* written by target, indicates completion */ |
| 200 | int ip_windex; /* only written by source cpu */ |
| 201 | struct { |
| 202 | ipifunc3_t func; |
| 203 | void *arg1; |
| 204 | int arg2; |
| 205 | char filler[32 - sizeof(int) - sizeof(void *) * 2]; |
| 206 | } ip_info[MAXCPUFIFO]; |
| 207 | }; |
| 208 | |
| 209 | /* |
| 210 | * CPU Synchronization structure. See lwkt_cpusync_start() and |
| 211 | * lwkt_cpusync_finish() for more information. |
| 212 | */ |
| 213 | typedef void (*cpusync_func_t)(void *arg); |
| 214 | |
| 215 | struct lwkt_cpusync { |
| 216 | cpumask_t cs_mask; /* cpus running the sync */ |
| 217 | cpumask_t cs_mack; /* mask acknowledge */ |
| 218 | cpusync_func_t cs_func; /* function to execute */ |
| 219 | void *cs_data; /* function data */ |
| 220 | }; |
| 221 | |
| 222 | /* |
| 223 | * The standard message and queue structure used for communications between |
| 224 | * cpus. Messages are typically queued via a machine-specific non-linked |
| 225 | * FIFO matrix allowing any cpu to send a message to any other cpu without |
| 226 | * blocking. |
| 227 | */ |
| 228 | typedef struct lwkt_cpu_msg { |
| 229 | void (*cm_func)(lwkt_cpu_msg_t msg); /* primary dispatch function */ |
| 230 | int cm_code; /* request code if applicable */ |
| 231 | int cm_cpu; /* reply to cpu */ |
| 232 | thread_t cm_originator; /* originating thread for wakeup */ |
| 233 | } lwkt_cpu_msg; |
| 234 | |
| 235 | /* |
| 236 | * Thread structure. Note that ownership of a thread structure is special |
| 237 | * cased and there is no 'token'. A thread is always owned by the cpu |
| 238 | * represented by td_gd, any manipulation of the thread by some other cpu |
| 239 | * must be done through cpu_*msg() functions. e.g. you could request |
| 240 | * ownership of a thread that way, or hand a thread off to another cpu. |
| 241 | * |
| 242 | * NOTE: td_ucred is synchronized from the p_ucred on user->kernel syscall, |
| 243 | * trap, and AST/signal transitions to provide a stable ucred for |
| 244 | * (primarily) system calls. This field will be NULL for pure kernel |
| 245 | * threads. |
| 246 | */ |
| 247 | struct md_intr_info; |
| 248 | |
| 249 | struct thread { |
| 250 | TAILQ_ENTRY(thread) td_threadq; |
| 251 | TAILQ_ENTRY(thread) td_allq; |
| 252 | TAILQ_ENTRY(thread) td_sleepq; |
| 253 | lwkt_port td_msgport; /* built-in message port for replies */ |
| 254 | struct lwp *td_lwp; /* (optional) associated lwp */ |
| 255 | struct proc *td_proc; /* (optional) associated process */ |
| 256 | struct pcb *td_pcb; /* points to pcb and top of kstack */ |
| 257 | struct globaldata *td_gd; /* associated with this cpu */ |
| 258 | const char *td_wmesg; /* string name for blockage */ |
| 259 | const volatile void *td_wchan; /* waiting on channel */ |
| 260 | int td_pri; /* 0-31, 31=highest priority (note 1) */ |
| 261 | int td_critcount; /* critical section priority */ |
| 262 | u_int td_flags; /* TDF flags */ |
| 263 | int td_wdomain; /* domain for wchan address (typ 0) */ |
| 264 | void (*td_preemptable)(struct thread *td, int critcount); |
| 265 | void (*td_release)(struct thread *td); |
| 266 | char *td_kstack; /* kernel stack */ |
| 267 | int td_kstack_size; /* size of kernel stack */ |
| 268 | char *td_sp; /* kernel stack pointer for LWKT restore */ |
| 269 | thread_t (*td_switch)(struct thread *ntd); |
| 270 | __uint64_t td_uticks; /* Statclock hits in user mode (uS) */ |
| 271 | __uint64_t td_sticks; /* Statclock hits in system mode (uS) */ |
| 272 | __uint64_t td_iticks; /* Statclock hits processing intr (uS) */ |
| 273 | int td_locks; /* lockmgr lock debugging */ |
| 274 | void *td_unused01; /* (future I/O scheduler heuristic) */ |
| 275 | int td_refs; /* hold position in gd_tdallq / hold free */ |
| 276 | int td_nest_count; /* prevent splz nesting */ |
| 277 | int td_contended; /* token contention count */ |
| 278 | u_int td_mpflags; /* flags can be set by foreign cpus */ |
| 279 | int td_cscount; /* cpu synchronization master */ |
| 280 | int td_wakefromcpu; /* who woke me up? */ |
| 281 | int td_upri; /* user priority (sub-priority under td_pri) */ |
| 282 | int td_type; /* thread type, TD_TYPE_ */ |
| 283 | int td_tracker; /* for callers to debug lock counts */ |
| 284 | int td_unused03[4]; /* for future fields */ |
| 285 | struct iosched_data td_iosdata; /* Dynamic I/O scheduling data */ |
| 286 | struct timeval td_start; /* start time for a thread/process */ |
| 287 | char td_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */ |
| 288 | struct thread *td_preempted; /* we preempted this thread */ |
| 289 | struct ucred *td_ucred; /* synchronized from p_ucred */ |
| 290 | void *td_vmm; /* vmm private data */ |
| 291 | lwkt_tokref_t td_toks_have; /* tokens we own */ |
| 292 | lwkt_tokref_t td_toks_stop; /* tokens we want */ |
| 293 | struct lwkt_tokref td_toks_array[LWKT_MAXTOKENS]; |
| 294 | int td_fairq_load; /* fairq */ |
| 295 | int td_fairq_count; /* fairq */ |
| 296 | struct globaldata *td_migrate_gd; /* target gd for thread migration */ |
| 297 | #ifdef DEBUG_CRIT_SECTIONS |
| 298 | #define CRIT_DEBUG_ARRAY_SIZE 32 |
| 299 | #define CRIT_DEBUG_ARRAY_MASK (CRIT_DEBUG_ARRAY_SIZE - 1) |
| 300 | const char *td_crit_debug_array[CRIT_DEBUG_ARRAY_SIZE]; |
| 301 | int td_crit_debug_index; |
| 302 | int td_in_crit_report; |
| 303 | #endif |
| 304 | struct md_thread td_mach; |
| 305 | #ifdef DEBUG_LOCKS |
| 306 | #define SPINLOCK_DEBUG_ARRAY_SIZE 32 |
| 307 | int td_spinlock_stack_id[SPINLOCK_DEBUG_ARRAY_SIZE]; |
| 308 | struct spinlock *td_spinlock_stack[SPINLOCK_DEBUG_ARRAY_SIZE]; |
| 309 | void *td_spinlock_caller_pc[SPINLOCK_DEBUG_ARRAY_SIZE]; |
| 310 | |
| 311 | /* |
| 312 | * Track lockmgr locks held; lk->lk_filename:lk->lk_lineno is the holder |
| 313 | */ |
| 314 | #define LOCKMGR_DEBUG_ARRAY_SIZE 8 |
| 315 | int td_lockmgr_stack_id[LOCKMGR_DEBUG_ARRAY_SIZE]; |
| 316 | struct lock *td_lockmgr_stack[LOCKMGR_DEBUG_ARRAY_SIZE]; |
| 317 | #endif |
| 318 | }; |
| 319 | |
| 320 | #define td_toks_base td_toks_array[0] |
| 321 | #define td_toks_end td_toks_array[LWKT_MAXTOKENS] |
| 322 | |
| 323 | #define TD_TOKS_HELD(td) ((td)->td_toks_stop != &(td)->td_toks_base) |
| 324 | #define TD_TOKS_NOT_HELD(td) ((td)->td_toks_stop == &(td)->td_toks_base) |
| 325 | |
| 326 | /* |
| 327 | * Thread flags. Note that TDF_RUNNING is cleared on the old thread after |
| 328 | * we switch to the new one, which is necessary because LWKTs don't need |
| 329 | * to hold the BGL. This flag is used by the exit code and the managed |
| 330 | * thread migration code. Note in addition that preemption will cause |
| 331 | * TDF_RUNNING to be cleared temporarily, so any code checking TDF_RUNNING |
| 332 | * must also check TDF_PREEMPT_LOCK. |
| 333 | * |
| 334 | * LWKT threads stay on their (per-cpu) run queue while running, not to |
| 335 | * be confused with user processes which are removed from the user scheduling |
| 336 | * run queue while actually running. |
| 337 | * |
| 338 | * td_threadq can represent the thread on one of three queues... the LWKT |
| 339 | * run queue, a tsleep queue, or an lwkt blocking queue. The LWKT subsystem |
| 340 | * does not allow a thread to be scheduled if it already resides on some |
| 341 | * queue. |
| 342 | */ |
| 343 | #define TDF_RUNNING 0x00000001 /* thread still active */ |
| 344 | #define TDF_RUNQ 0x00000002 /* on an LWKT run queue */ |
| 345 | #define TDF_PREEMPT_LOCK 0x00000004 /* I have been preempted */ |
| 346 | #define TDF_PREEMPT_DONE 0x00000008 /* ac preemption complete */ |
| 347 | #define TDF_NOSTART 0x00000010 /* do not schedule on create */ |
| 348 | #define TDF_MIGRATING 0x00000020 /* thread is being migrated */ |
| 349 | #define TDF_SINTR 0x00000040 /* interruptability for 'ps' */ |
| 350 | #define TDF_TSLEEPQ 0x00000080 /* on a tsleep wait queue */ |
| 351 | |
| 352 | #define TDF_SYSTHREAD 0x00000100 /* reserve memory may be used */ |
| 353 | #define TDF_ALLOCATED_THREAD 0x00000200 /* objcache allocated thread */ |
| 354 | #define TDF_ALLOCATED_STACK 0x00000400 /* objcache allocated stack */ |
| 355 | #define TDF_VERBOSE 0x00000800 /* verbose on exit */ |
| 356 | #define TDF_DEADLKTREAT 0x00001000 /* special lockmgr treatment */ |
| 357 | #define TDF_MARKER 0x00002000 /* tdallq list scan marker */ |
| 358 | #define TDF_TIMEOUT_RUNNING 0x00004000 /* tsleep timeout race */ |
| 359 | #define TDF_TIMEOUT 0x00008000 /* tsleep timeout */ |
| 360 | #define TDF_INTTHREAD 0x00010000 /* interrupt thread */ |
| 361 | #define TDF_TSLEEP_DESCHEDULED 0x00020000 /* tsleep core deschedule */ |
| 362 | #define TDF_BLOCKED 0x00040000 /* Thread is blocked */ |
| 363 | #define TDF_PANICWARN 0x00080000 /* panic warning in switch */ |
| 364 | #define TDF_BLOCKQ 0x00100000 /* on block queue */ |
| 365 | #define TDF_FORCE_SPINPORT 0x00200000 |
| 366 | #define TDF_EXITING 0x00400000 /* thread exiting */ |
| 367 | #define TDF_USINGFP 0x00800000 /* thread using fp coproc */ |
| 368 | #define TDF_KERNELFP 0x01000000 /* kernel using fp coproc */ |
| 369 | #define TDF_DELAYED_WAKEUP 0x02000000 |
| 370 | #define TDF_FIXEDCPU 0x04000000 /* running cpu is fixed */ |
| 371 | #define TDF_USERMODE 0x08000000 /* in or entering user mode */ |
| 372 | #define TDF_NOFAULT 0x10000000 /* force onfault on fault */ |
| 373 | |
| 374 | #define TDF_MP_STOPREQ 0x00000001 /* suspend_kproc */ |
| 375 | #define TDF_MP_WAKEREQ 0x00000002 /* resume_kproc */ |
| 376 | #define TDF_MP_EXITWAIT 0x00000004 /* reaper, see lwp_wait() */ |
| 377 | #define TDF_MP_EXITSIG 0x00000008 /* reaper, see lwp_wait() */ |
| 378 | #define TDF_MP_BATCH_DEMARC 0x00000010 /* batch mode handling */ |
| 379 | #define TDF_MP_DIDYIELD 0x00000020 /* effects scheduling */ |
| 380 | |
| 381 | #define TD_TYPE_GENERIC 0 /* generic thread */ |
| 382 | #define TD_TYPE_CRYPTO 1 /* crypto thread */ |
| 383 | #define TD_TYPE_NETISR 2 /* netisr thread */ |
| 384 | |
| 385 | /* |
| 386 | * Thread priorities. Typically only one thread from any given |
| 387 | * user process scheduling queue is on the LWKT run queue at a time. |
| 388 | * Remember that there is one LWKT run queue per cpu. |
| 389 | * |
| 390 | * Critical sections are handled by bumping td_pri above TDPRI_MAX, which |
| 391 | * causes interrupts to be masked as they occur. When this occurs a |
| 392 | * rollup flag will be set in mycpu->gd_reqflags. |
| 393 | */ |
| 394 | #define TDPRI_IDLE_THREAD 0 /* the idle thread */ |
| 395 | #define TDPRI_IDLE_WORK 1 /* idle work (page zero, etc) */ |
| 396 | #define TDPRI_USER_SCHEDULER 2 /* user scheduler helper */ |
| 397 | #define TDPRI_USER_IDLE 4 /* user scheduler idle */ |
| 398 | #define TDPRI_USER_NORM 6 /* user scheduler normal */ |
| 399 | #define TDPRI_USER_REAL 8 /* user scheduler real time */ |
| 400 | #define TDPRI_KERN_LPSCHED 9 /* scheduler helper for userland sch */ |
| 401 | #define TDPRI_KERN_USER 10 /* kernel / block in syscall */ |
| 402 | #define TDPRI_KERN_DAEMON 12 /* kernel daemon (pageout, etc) */ |
| 403 | #define TDPRI_SOFT_NORM 14 /* kernel / normal */ |
| 404 | #define TDPRI_SOFT_TIMER 16 /* kernel / timer */ |
| 405 | #define TDPRI_EXITING 19 /* exiting thread */ |
| 406 | #define TDPRI_INT_SUPPORT 20 /* kernel / high priority support */ |
| 407 | #define TDPRI_INT_LOW 27 /* low priority interrupt */ |
| 408 | #define TDPRI_INT_MED 28 /* medium priority interrupt */ |
| 409 | #define TDPRI_INT_HIGH 29 /* high priority interrupt */ |
| 410 | #define TDPRI_MAX 31 |
| 411 | |
| 412 | #define LWKT_THREAD_STACK (UPAGES * PAGE_SIZE) |
| 413 | |
| 414 | #define IN_CRITICAL_SECT(td) ((td)->td_critcount) |
| 415 | |
| 416 | #ifdef _KERNEL |
| 417 | |
| 418 | /* |
| 419 | * Global tokens |
| 420 | */ |
| 421 | extern struct lwkt_token mp_token; |
| 422 | extern struct lwkt_token pmap_token; |
| 423 | extern struct lwkt_token dev_token; |
| 424 | extern struct lwkt_token vm_token; |
| 425 | extern struct lwkt_token vmspace_token; |
| 426 | extern struct lwkt_token kvm_token; |
| 427 | extern struct lwkt_token sigio_token; |
| 428 | extern struct lwkt_token tty_token; |
| 429 | extern struct lwkt_token vnode_token; |
| 430 | extern struct lwkt_token revoke_token; |
| 431 | |
| 432 | /* |
| 433 | * Procedures |
| 434 | */ |
| 435 | extern struct thread *lwkt_alloc_thread(struct thread *, int, int, int); |
| 436 | extern void lwkt_init_thread(struct thread *, void *, int, int, |
| 437 | struct globaldata *); |
| 438 | extern void lwkt_set_interrupt_support_thread(void); |
| 439 | extern void lwkt_set_comm(thread_t, const char *, ...) __printflike(2, 3); |
| 440 | extern void lwkt_free_thread(struct thread *); |
| 441 | extern void lwkt_gdinit(struct globaldata *); |
| 442 | extern void lwkt_switch(void); |
| 443 | extern void lwkt_switch_return(struct thread *); |
| 444 | extern void lwkt_preempt(thread_t, int); |
| 445 | extern void lwkt_schedule(thread_t); |
| 446 | extern void lwkt_schedule_noresched(thread_t); |
| 447 | extern void lwkt_schedule_self(thread_t); |
| 448 | extern void lwkt_deschedule(thread_t); |
| 449 | extern void lwkt_deschedule_self(thread_t); |
| 450 | extern void lwkt_yield(void); |
| 451 | extern void lwkt_yield_quick(void); |
| 452 | extern void lwkt_user_yield(void); |
| 453 | extern void lwkt_hold(thread_t); |
| 454 | extern void lwkt_rele(thread_t); |
| 455 | extern void lwkt_passive_release(thread_t); |
| 456 | extern void lwkt_maybe_splz(thread_t); |
| 457 | |
| 458 | extern void lwkt_gettoken(lwkt_token_t); |
| 459 | extern void lwkt_gettoken_shared(lwkt_token_t); |
| 460 | extern void lwkt_gettoken_hard(lwkt_token_t); |
| 461 | extern int lwkt_trytoken(lwkt_token_t); |
| 462 | extern void lwkt_reltoken(lwkt_token_t); |
| 463 | extern void lwkt_reltoken_hard(lwkt_token_t); |
| 464 | extern int lwkt_cnttoken(lwkt_token_t, thread_t); |
| 465 | extern int lwkt_getalltokens(thread_t, int); |
| 466 | extern void lwkt_relalltokens(thread_t); |
| 467 | extern void lwkt_token_init(lwkt_token_t, const char *); |
| 468 | extern void lwkt_token_uninit(lwkt_token_t); |
| 469 | |
| 470 | extern void lwkt_token_pool_init(void); |
| 471 | extern lwkt_token_t lwkt_token_pool_lookup(void *); |
| 472 | extern lwkt_token_t lwkt_getpooltoken(void *); |
| 473 | extern void lwkt_relpooltoken(void *); |
| 474 | |
| 475 | extern void lwkt_token_swap(void); |
| 476 | |
| 477 | extern void lwkt_setpri(thread_t, int); |
| 478 | extern void lwkt_setpri_initial(thread_t, int); |
| 479 | extern void lwkt_setpri_self(int); |
| 480 | extern void lwkt_schedulerclock(thread_t td); |
| 481 | extern void lwkt_setcpu_self(struct globaldata *); |
| 482 | extern void lwkt_migratecpu(int); |
| 483 | |
| 484 | extern void lwkt_giveaway(struct thread *); |
| 485 | extern void lwkt_acquire(struct thread *); |
| 486 | extern int lwkt_send_ipiq3(struct globaldata *, ipifunc3_t, void *, int); |
| 487 | extern int lwkt_send_ipiq3_passive(struct globaldata *, ipifunc3_t, |
| 488 | void *, int); |
| 489 | extern int lwkt_send_ipiq3_nowait(struct globaldata *, ipifunc3_t, |
| 490 | void *, int); |
| 491 | extern int lwkt_send_ipiq3_bycpu(int, ipifunc3_t, void *, int); |
| 492 | extern int lwkt_send_ipiq3_mask(cpumask_t, ipifunc3_t, void *, int); |
| 493 | extern void lwkt_wait_ipiq(struct globaldata *, int); |
| 494 | extern int lwkt_seq_ipiq(struct globaldata *); |
| 495 | extern void lwkt_process_ipiq(void); |
| 496 | extern void lwkt_process_ipiq_frame(struct intrframe *); |
| 497 | extern void lwkt_smp_stopped(void); |
| 498 | extern void lwkt_synchronize_ipiqs(const char *); |
| 499 | |
| 500 | /* lwkt_cpusync_init() - inline function in sys/thread2.h */ |
| 501 | extern void lwkt_cpusync_simple(cpumask_t, cpusync_func_t, void *); |
| 502 | extern void lwkt_cpusync_interlock(lwkt_cpusync_t); |
| 503 | extern void lwkt_cpusync_deinterlock(lwkt_cpusync_t); |
| 504 | extern void lwkt_cpusync_quick(lwkt_cpusync_t); |
| 505 | |
| 506 | extern void crit_panic(void) __dead2; |
| 507 | extern struct lwp *lwkt_preempted_proc(void); |
| 508 | |
| 509 | extern int lwkt_create (void (*func)(void *), void *, struct thread **, |
| 510 | struct thread *, int, int, |
| 511 | const char *, ...) __printflike(7, 8); |
| 512 | extern void lwkt_exit (void) __dead2; |
| 513 | extern void lwkt_remove_tdallq (struct thread *); |
| 514 | |
| 515 | #endif |
| 516 | |
| 517 | #endif |
| 518 | |