kernel: Make SMP support default (and non-optional).
[dragonfly.git] / sys / sys / thread.h
CommitLineData
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1/*
2 * SYS/THREAD.H
3 *
4 * Implements the architecture independant portion of the LWKT
5 * subsystem.
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6 *
7 * Types which must already be defined when this header is included by
8 * userland: struct md_thread
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9 */
10
11#ifndef _SYS_THREAD_H_
12#define _SYS_THREAD_H_
13
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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
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20#ifndef _SYS_QUEUE_H_
21#include <sys/queue.h> /* TAILQ_* macros */
22#endif
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23#ifndef _SYS_MSGPORT_H_
24#include <sys/msgport.h> /* lwkt_port */
25#endif
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26#ifndef _SYS_TIME_H_
27#include <sys/time.h> /* struct timeval */
28#endif
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29#ifndef _SYS_LOCK_H
30#include <sys/lock.h>
31#endif
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32#ifndef _SYS_SPINLOCK_H_
33#include <sys/spinlock.h>
34#endif
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35#ifndef _SYS_IOSCHED_H_
36#include <sys/iosched.h>
37#endif
1bd40720 38#include <machine/thread.h>
8a8d5d85 39
f1d1c3fa 40struct globaldata;
ef09c3ed 41struct lwp;
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42struct proc;
43struct thread;
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44struct lwkt_queue;
45struct lwkt_token;
41a01a4d 46struct lwkt_tokref;
96728c05 47struct lwkt_ipiq;
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48struct lwkt_cpu_msg;
49struct lwkt_cpu_port;
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50struct lwkt_msg;
51struct lwkt_port;
3b6b7bd1 52struct lwkt_cpusync;
4fd10eb6 53union sysunion;
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54
55typedef struct lwkt_queue *lwkt_queue_t;
56typedef struct lwkt_token *lwkt_token_t;
41a01a4d 57typedef struct lwkt_tokref *lwkt_tokref_t;
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58typedef struct lwkt_cpu_msg *lwkt_cpu_msg_t;
59typedef struct lwkt_cpu_port *lwkt_cpu_port_t;
96728c05 60typedef struct lwkt_ipiq *lwkt_ipiq_t;
3b6b7bd1 61typedef struct lwkt_cpusync *lwkt_cpusync_t;
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62typedef struct thread *thread_t;
63
64typedef TAILQ_HEAD(lwkt_queue, thread) lwkt_queue;
f1d1c3fa 65
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66/*
67 * Differentiation between kernel threads and user threads. Userland
68 * programs which want to access to kernel structures have to define
69 * _KERNEL_STRUCTURES. This is a kinda safety valve to prevent badly
70 * written user programs from getting an LWKT thread that is neither the
71 * kernel nor the user version.
72 */
73#if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
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74#ifndef _MACHINE_THREAD_H_
75#include <machine/thread.h> /* md_thread */
76#endif
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77#ifndef _MACHINE_FRAME_H_
78#include <machine/frame.h>
79#endif
80#else
81struct intrframe;
ece04fd0 82#endif
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83
84/*
41a01a4d 85 * Tokens are used to serialize access to information. They are 'soft'
dd55d707 86 * serialization entities that only stay in effect while a thread is
41a01a4d 87 * running. If the thread blocks, other threads can run holding the same
dd55d707 88 * token(s). The tokens are reacquired when the original thread resumes.
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89 *
90 * A thread can depend on its serialization remaining intact through a
91 * preemption. An interrupt which attempts to use the same token as the
92 * thread being preempted will reschedule itself for non-preemptive
93 * operation, so the new token code is capable of interlocking against
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94 * interrupts as well as other cpus. This means that your token can only
95 * be (temporarily) lost if you *explicitly* block.
41a01a4d 96 *
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97 * Tokens are managed through a helper reference structure, lwkt_tokref. Each
98 * thread has a stack of tokref's to keep track of acquired tokens. Multiple
99 * tokref's may reference the same token.
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100 *
101 * Tokens can be held shared or exclusive. An exclusive holder is able
102 * to set the TOK_EXCLUSIVE bit in t_count as long as no bit in the count
103 * mask is set. If unable to accomplish this TOK_EXCLREQ can be set instead
104 * which prevents any new shared acquisitions while the exclusive requestor
105 * spins in the scheduler. A shared holder can bump t_count by the increment
106 * value as long as neither TOK_EXCLUSIVE or TOK_EXCLREQ is set, else spin
107 * in the scheduler.
108 *
109 * Multiple exclusive tokens are handled by treating the additional tokens
110 * as a special case of the shared token, incrementing the count value. This
111 * reduces the complexity of the token release code.
f1d1c3fa 112 */
dd55d707 113
f1d1c3fa 114typedef struct lwkt_token {
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115 long t_count; /* Shared/exclreq/exclusive access */
116 struct lwkt_tokref *t_ref; /* Exclusive ref */
c9aa7a82 117 long t_collisions; /* Collision counter */
b37f18d6 118 const char *t_desc; /* Descriptive name */
7eb611ef 119} lwkt_token;
dd55d707 120
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121#define TOK_EXCLUSIVE 0x00000001 /* Exclusive lock held */
122#define TOK_EXCLREQ 0x00000002 /* Exclusive request pending */
123#define TOK_INCR 4 /* Shared count increment */
124#define TOK_COUNTMASK (~(long)(TOK_EXCLUSIVE|TOK_EXCLREQ))
125
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126/*
127 * Static initialization for a lwkt_token.
3b998fa9 128 */
a3c18566 129#define LWKT_TOKEN_INITIALIZER(name) \
c6fbe95a 130{ \
54341a3b 131 .t_count = 0, \
3b998fa9 132 .t_ref = NULL, \
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133 .t_collisions = 0, \
134 .t_desc = #name \
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135}
136
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137/*
138 * Assert that a particular token is held
139 */
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140#define LWKT_TOKEN_HELD_ANY(tok) _lwkt_token_held_any(tok, curthread)
141#define LWKT_TOKEN_HELD_EXCL(tok) _lwkt_token_held_excl(tok, curthread)
b5d16701 142
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143#define ASSERT_LWKT_TOKEN_HELD(tok) \
144 KKASSERT(LWKT_TOKEN_HELD_ANY(tok))
145
146#define ASSERT_LWKT_TOKEN_HELD_EXCL(tok) \
147 KKASSERT(LWKT_TOKEN_HELD_EXCL(tok))
b5d16701 148
3933a3ab 149#define ASSERT_NO_TOKENS_HELD(td) \
b5d16701 150 KKASSERT((td)->td_toks_stop == &td->td_toks_array[0])
8ed305a4 151
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152/*
153 * Assert that a particular token is held and we are in a hard
154 * code execution section (interrupt, ipi, or hard code section).
155 * Hard code sections are not allowed to block or potentially block.
156 * e.g. lwkt_gettoken() would only be ok if the token were already
157 * held.
158 */
159#define ASSERT_LWKT_TOKEN_HARD(tok) \
160 do { \
161 globaldata_t zgd __debugvar = mycpu; \
162 KKASSERT((tok)->t_ref && \
163 (tok)->t_ref->tr_owner == zgd->gd_curthread && \
164 zgd->gd_intr_nesting_level > 0); \
165 } while(0)
166
167/*
168 * Assert that a particular token is held and we are in a normal
169 * critical section. Critical sections will not be preempted but
170 * can explicitly block (tsleep, lwkt_gettoken, etc).
171 */
172#define ASSERT_LWKT_TOKEN_CRIT(tok) \
173 do { \
174 globaldata_t zgd __debugvar = mycpu; \
175 KKASSERT((tok)->t_ref && \
176 (tok)->t_ref->tr_owner == zgd->gd_curthread && \
177 zgd->gd_curthread->td_critcount > 0); \
178 } while(0)
179
3b998fa9 180struct lwkt_tokref {
41a01a4d 181 lwkt_token_t tr_tok; /* token in question */
54341a3b 182 long tr_count; /* TOK_EXCLUSIVE|TOK_EXCLREQ or 0 */
c6fbe95a 183 struct thread *tr_owner; /* me */
3b998fa9 184};
41a01a4d 185
b12defdc 186#define MAXCPUFIFO 32 /* power of 2 */
96728c05 187#define MAXCPUFIFO_MASK (MAXCPUFIFO - 1)
3b998fa9 188#define LWKT_MAXTOKENS 32 /* max tokens beneficially held by thread */
96728c05 189
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190/*
191 * Always cast to ipifunc_t when registering an ipi. The actual ipi function
192 * is called with both the data and an interrupt frame, but the ipi function
193 * that is registered might only declare a data argument.
194 */
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195typedef void (*ipifunc1_t)(void *arg);
196typedef void (*ipifunc2_t)(void *arg, int arg2);
197typedef void (*ipifunc3_t)(void *arg, int arg2, struct intrframe *frame);
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198
199typedef struct lwkt_ipiq {
200 int ip_rindex; /* only written by target cpu */
166ec852 201 int ip_xindex; /* written by target, indicates completion */
96728c05 202 int ip_windex; /* only written by source cpu */
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203 struct {
204 ipifunc3_t func;
205 void *arg1;
206 int arg2;
207 char filler[32 - sizeof(int) - sizeof(void *) * 2];
208 } ip_info[MAXCPUFIFO];
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209} lwkt_ipiq;
210
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211/*
212 * CPU Synchronization structure. See lwkt_cpusync_start() and
213 * lwkt_cpusync_finish() for more information.
214 */
d5b2d319 215typedef void (*cpusync_func_t)(void *arg);
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216
217struct lwkt_cpusync {
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218 cpumask_t cs_mask; /* cpus running the sync */
219 cpumask_t cs_mack; /* mask acknowledge */
220 cpusync_func_t cs_func; /* function to execute */
221 void *cs_data; /* function data */
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222};
223
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224/*
225 * The standard message and queue structure used for communications between
226 * cpus. Messages are typically queued via a machine-specific non-linked
227 * FIFO matrix allowing any cpu to send a message to any other cpu without
228 * blocking.
229 */
230typedef struct lwkt_cpu_msg {
231 void (*cm_func)(lwkt_cpu_msg_t msg); /* primary dispatch function */
232 int cm_code; /* request code if applicable */
233 int cm_cpu; /* reply to cpu */
234 thread_t cm_originator; /* originating thread for wakeup */
235} lwkt_cpu_msg;
236
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237/*
238 * Thread structure. Note that ownership of a thread structure is special
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239 * cased and there is no 'token'. A thread is always owned by the cpu
240 * represented by td_gd, any manipulation of the thread by some other cpu
241 * must be done through cpu_*msg() functions. e.g. you could request
242 * ownership of a thread that way, or hand a thread off to another cpu.
4b5f931b 243 *
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244 * NOTE: td_ucred is synchronized from the p_ucred on user->kernel syscall,
245 * trap, and AST/signal transitions to provide a stable ucred for
246 * (primarily) system calls. This field will be NULL for pure kernel
247 * threads.
f1d1c3fa 248 */
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249struct md_intr_info;
250
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251struct thread {
252 TAILQ_ENTRY(thread) td_threadq;
73e4f7b9 253 TAILQ_ENTRY(thread) td_allq;
ae8e83e6 254 TAILQ_ENTRY(thread) td_sleepq;
ece04fd0 255 lwkt_port td_msgport; /* built-in message port for replies */
ef09c3ed 256 struct lwp *td_lwp; /* (optional) associated lwp */
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257 struct proc *td_proc; /* (optional) associated process */
258 struct pcb *td_pcb; /* points to pcb and top of kstack */
26a0694b 259 struct globaldata *td_gd; /* associated with this cpu */
ae8050a4 260 const char *td_wmesg; /* string name for blockage */
5decebc7 261 const volatile void *td_wchan; /* waiting on channel */
4b5f931b 262 int td_pri; /* 0-31, 31=highest priority (note 1) */
f9235b6d 263 int td_critcount; /* critical section priority */
4643740a 264 u_int td_flags; /* TDF flags */
da5fb9ef 265 int td_wdomain; /* domain for wchan address (typ 0) */
f9235b6d 266 void (*td_preemptable)(struct thread *td, int critcount);
a2a5ad0d 267 void (*td_release)(struct thread *td);
7e1d4bf4 268 char *td_kstack; /* kernel stack */
f470d0c8 269 int td_kstack_size; /* size of kernel stack */
8ad65e08 270 char *td_sp; /* kernel stack pointer for LWKT restore */
cc9b6223 271 thread_t (*td_switch)(struct thread *ntd);
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272 __uint64_t td_uticks; /* Statclock hits in user mode (uS) */
273 __uint64_t td_sticks; /* Statclock hits in system mode (uS) */
274 __uint64_t td_iticks; /* Statclock hits processing intr (uS) */
69d78e99 275 int td_locks; /* lockmgr lock debugging */
8c72e3d5 276 void *td_dsched_priv1; /* priv data for I/O schedulers */
73e4f7b9 277 int td_refs; /* hold position in gd_tdallq / hold free */
46a3f46d 278 int td_nest_count; /* prevent splz nesting */
85946b6c 279 int td_contended; /* token contention count */
4643740a 280 u_int td_mpflags; /* flags can be set by foreign cpus */
0f7a3396 281 int td_cscount; /* cpu synchronization master */
c75e41b7 282 int td_wakefromcpu; /* who woke me up? */
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283 int td_upri; /* user priority (sub-priority under td_pri) */
284 int td_unused02[2]; /* for future fields */
b5d16701 285 int td_unused03[4]; /* for future fields */
79eae878 286 struct iosched_data td_iosdata; /* Dynamic I/O scheduling data */
41f3429e 287 struct timeval td_start; /* start time for a thread/process */
0cfcada1 288 char td_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */
99df837e 289 struct thread *td_preempted; /* we preempted this thread */
d86a23e0 290 struct ucred *td_ucred; /* synchronized from p_ucred */
8f8e1daf 291 void *td_unused04; /* for future fields */
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292 lwkt_tokref_t td_toks_have; /* tokens we own */
293 lwkt_tokref_t td_toks_stop; /* tokens we want */
3b998fa9 294 struct lwkt_tokref td_toks_array[LWKT_MAXTOKENS];
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295 int td_fairq_load; /* fairq */
296 int td_fairq_count; /* fairq */
cc9b6223 297 struct globaldata *td_migrate_gd; /* target gd for thread migration */
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298#ifdef DEBUG_CRIT_SECTIONS
299#define CRIT_DEBUG_ARRAY_SIZE 32
300#define CRIT_DEBUG_ARRAY_MASK (CRIT_DEBUG_ARRAY_SIZE - 1)
301 const char *td_crit_debug_array[CRIT_DEBUG_ARRAY_SIZE];
302 int td_crit_debug_index;
303 int td_in_crit_report;
304#endif
85100692 305 struct md_thread td_mach;
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306#ifdef DEBUG_LOCKS
307#define SPINLOCK_DEBUG_ARRAY_SIZE 32
308 int td_spinlock_stack_id[SPINLOCK_DEBUG_ARRAY_SIZE];
309 struct spinlock *td_spinlock_stack[SPINLOCK_DEBUG_ARRAY_SIZE];
310 void *td_spinlock_caller_pc[SPINLOCK_DEBUG_ARRAY_SIZE];
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311
312 /*
313 * Track lockmgr locks held; lk->lk_filename:lk->lk_lineno is the holder
314 */
315#define LOCKMGR_DEBUG_ARRAY_SIZE 8
316 int td_lockmgr_stack_id[LOCKMGR_DEBUG_ARRAY_SIZE];
317 struct lock *td_lockmgr_stack[LOCKMGR_DEBUG_ARRAY_SIZE];
1a474e56 318#endif
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319};
320
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321#define td_toks_base td_toks_array[0]
322#define td_toks_end td_toks_array[LWKT_MAXTOKENS]
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323
324#define TD_TOKS_HELD(td) ((td)->td_toks_stop != &(td)->td_toks_base)
325#define TD_TOKS_NOT_HELD(td) ((td)->td_toks_stop == &(td)->td_toks_base)
326
8ad65e08 327/*
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328 * Thread flags. Note that TDF_RUNNING is cleared on the old thread after
329 * we switch to the new one, which is necessary because LWKTs don't need
330 * to hold the BGL. This flag is used by the exit code and the managed
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331 * thread migration code. Note in addition that preemption will cause
332 * TDF_RUNNING to be cleared temporarily, so any code checking TDF_RUNNING
333 * must also check TDF_PREEMPT_LOCK.
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334 *
335 * LWKT threads stay on their (per-cpu) run queue while running, not to
336 * be confused with user processes which are removed from the user scheduling
337 * run queue while actually running.
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338 *
339 * td_threadq can represent the thread on one of three queues... the LWKT
340 * run queue, a tsleep queue, or an lwkt blocking queue. The LWKT subsystem
341 * does not allow a thread to be scheduled if it already resides on some
342 * queue.
8ad65e08 343 */
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344#define TDF_RUNNING 0x00000001 /* thread still active */
345#define TDF_RUNQ 0x00000002 /* on an LWKT run queue */
346#define TDF_PREEMPT_LOCK 0x00000004 /* I have been preempted */
347#define TDF_PREEMPT_DONE 0x00000008 /* ac preemption complete */
348#define TDF_NOSTART 0x00000010 /* do not schedule on create */
349#define TDF_MIGRATING 0x00000020 /* thread is being migrated */
350#define TDF_SINTR 0x00000040 /* interruptability for 'ps' */
351#define TDF_TSLEEPQ 0x00000080 /* on a tsleep wait queue */
26a0694b 352
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353#define TDF_SYSTHREAD 0x00000100 /* reserve memory may be used */
354#define TDF_ALLOCATED_THREAD 0x00000200 /* objcache allocated thread */
355#define TDF_ALLOCATED_STACK 0x00000400 /* objcache allocated stack */
356#define TDF_VERBOSE 0x00000800 /* verbose on exit */
357#define TDF_DEADLKTREAT 0x00001000 /* special lockmgr treatment */
eb2adbf5 358#define TDF_MARKER 0x00002000 /* tdallq list scan marker */
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359#define TDF_TIMEOUT_RUNNING 0x00004000 /* tsleep timeout race */
360#define TDF_TIMEOUT 0x00008000 /* tsleep timeout */
03aa8d99 361#define TDF_INTTHREAD 0x00010000 /* interrupt thread */
ae8e83e6 362#define TDF_TSLEEP_DESCHEDULED 0x00020000 /* tsleep core deschedule */
8ec60c3f 363#define TDF_BLOCKED 0x00040000 /* Thread is blocked */
a7422615 364#define TDF_PANICWARN 0x00080000 /* panic warning in switch */
344ad853 365#define TDF_BLOCKQ 0x00100000 /* on block queue */
392cd266 366#define TDF_FORCE_SPINPORT 0x00200000
c1102e9f 367#define TDF_EXITING 0x00400000 /* thread exiting */
1b251f0a 368#define TDF_USINGFP 0x00800000 /* thread using fp coproc */
aad81e48 369#define TDF_KERNELFP 0x01000000 /* kernel using fp coproc */
b0da0c88 370#define TDF_DELAYED_WAKEUP 0x02000000
345ee1fb 371#define TDF_CRYPTO 0x04000000 /* crypto thread */
d992c377 372#define TDF_USERMODE 0x08000000 /* in or entering user mode */
8ad65e08 373
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374#define TDF_MP_STOPREQ 0x00000001 /* suspend_kproc */
375#define TDF_MP_WAKEREQ 0x00000002 /* resume_kproc */
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376#define TDF_MP_EXITWAIT 0x00000004 /* reaper, see lwp_wait() */
377#define TDF_MP_EXITSIG 0x00000008 /* reaper, see lwp_wait() */
a3ef5f2e 378#define TDF_MP_BATCH_DEMARC 0x00000010 /* batch mode handling */
4643740a 379
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380/*
381 * Thread priorities. Typically only one thread from any given
382 * user process scheduling queue is on the LWKT run queue at a time.
383 * Remember that there is one LWKT run queue per cpu.
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384 *
385 * Critical sections are handled by bumping td_pri above TDPRI_MAX, which
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386 * causes interrupts to be masked as they occur. When this occurs a
387 * rollup flag will be set in mycpu->gd_reqflags.
2df9fa87 388 */
f1d1c3fa 389#define TDPRI_IDLE_THREAD 0 /* the idle thread */
bb6811be 390#define TDPRI_IDLE_WORK 1 /* idle work (page zero, etc) */
50017724 391#define TDPRI_USER_SCHEDULER 2 /* user scheduler helper */
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392#define TDPRI_USER_IDLE 4 /* user scheduler idle */
393#define TDPRI_USER_NORM 6 /* user scheduler normal */
394#define TDPRI_USER_REAL 8 /* user scheduler real time */
9ae9ee8d 395#define TDPRI_KERN_LPSCHED 9 /* scheduler helper for userland sch */
f1d1c3fa 396#define TDPRI_KERN_USER 10 /* kernel / block in syscall */
26a0694b 397#define TDPRI_KERN_DAEMON 12 /* kernel daemon (pageout, etc) */
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398#define TDPRI_SOFT_NORM 14 /* kernel / normal */
399#define TDPRI_SOFT_TIMER 16 /* kernel / timer */
ae8050a4 400#define TDPRI_EXITING 19 /* exiting thread */
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401#define TDPRI_INT_SUPPORT 20 /* kernel / high priority support */
402#define TDPRI_INT_LOW 27 /* low priority interrupt */
403#define TDPRI_INT_MED 28 /* medium priority interrupt */
404#define TDPRI_INT_HIGH 29 /* high priority interrupt */
405#define TDPRI_MAX 31
406
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407#define LWKT_THREAD_STACK (UPAGES * PAGE_SIZE)
408
f9235b6d 409#define IN_CRITICAL_SECT(td) ((td)->td_critcount)
f8c3996b 410
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411#ifdef _KERNEL
412
413/*
414 * Global tokens
415 */
b5d16701 416extern struct lwkt_token mp_token;
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417extern struct lwkt_token pmap_token;
418extern struct lwkt_token dev_token;
d63ddd9c 419extern struct lwkt_token vm_token;
d39d3c43 420extern struct lwkt_token vmspace_token;
d63ddd9c 421extern struct lwkt_token kvm_token;
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422extern struct lwkt_token proc_token;
423extern struct lwkt_token tty_token;
424extern struct lwkt_token vnode_token;
2de4f77e 425extern struct lwkt_token vmobj_token;
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426
427/*
428 * Procedures
429 */
40aaf5fc 430extern void lwkt_init(void);
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431extern struct thread *lwkt_alloc_thread(struct thread *, int, int, int);
432extern void lwkt_init_thread(struct thread *, void *, int, int,
433 struct globaldata *);
e6546af9 434extern void lwkt_set_interrupt_support_thread(void);
fcefa6f2 435extern void lwkt_set_comm(thread_t, const char *, ...) __printflike(2, 3);
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436extern void lwkt_free_thread(struct thread *);
437extern void lwkt_gdinit(struct globaldata *);
8ad65e08 438extern void lwkt_switch(void);
cc9b6223 439extern void lwkt_switch_return(struct thread *);
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440extern void lwkt_preempt(thread_t, int);
441extern void lwkt_schedule(thread_t);
361d01dd 442extern void lwkt_schedule_noresched(thread_t);
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443extern void lwkt_schedule_self(thread_t);
444extern void lwkt_deschedule(thread_t);
445extern void lwkt_deschedule_self(thread_t);
f1d1c3fa 446extern void lwkt_yield(void);
40504122 447extern void lwkt_yield_quick(void);
3824f392 448extern void lwkt_user_yield(void);
41a01a4d 449extern void lwkt_token_wait(void);
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450extern void lwkt_hold(thread_t);
451extern void lwkt_rele(thread_t);
3824f392 452extern void lwkt_passive_release(thread_t);
4a28fe22 453extern void lwkt_maybe_splz(thread_t);
b9665ad7 454
3b998fa9 455extern void lwkt_gettoken(lwkt_token_t);
54341a3b 456extern void lwkt_gettoken_shared(lwkt_token_t);
4a28fe22 457extern void lwkt_gettoken_hard(lwkt_token_t);
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458extern int lwkt_trytoken(lwkt_token_t);
459extern void lwkt_reltoken(lwkt_token_t);
4a28fe22 460extern void lwkt_reltoken_hard(lwkt_token_t);
b5d16701 461extern int lwkt_cnttoken(lwkt_token_t, thread_t);
b12defdc 462extern int lwkt_getalltokens(thread_t, int);
b9665ad7 463extern void lwkt_relalltokens(thread_t);
41a01a4d 464extern void lwkt_drain_token_requests(void);
a3c18566 465extern void lwkt_token_init(lwkt_token_t, const char *);
b9665ad7 466extern void lwkt_token_uninit(lwkt_token_t);
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467
468extern void lwkt_token_pool_init(void);
c6fbe95a 469extern lwkt_token_t lwkt_token_pool_lookup(void *);
3b998fa9 470extern lwkt_token_t lwkt_getpooltoken(void *);
177e553a 471extern void lwkt_relpooltoken(void *);
41a01a4d 472
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473extern void lwkt_token_swap(void);
474
b9665ad7 475extern void lwkt_setpri(thread_t, int);
03bd0a5e 476extern void lwkt_setpri_initial(thread_t, int);
b9665ad7 477extern void lwkt_setpri_self(int);
85946b6c 478extern void lwkt_schedulerclock(thread_t td);
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479extern void lwkt_setcpu_self(struct globaldata *);
480extern void lwkt_migratecpu(int);
b8a98473 481
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482extern void lwkt_giveaway(struct thread *);
483extern void lwkt_acquire(struct thread *);
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484extern int lwkt_send_ipiq3(struct globaldata *, ipifunc3_t, void *, int);
485extern int lwkt_send_ipiq3_passive(struct globaldata *, ipifunc3_t,
486 void *, int);
487extern int lwkt_send_ipiq3_nowait(struct globaldata *, ipifunc3_t,
488 void *, int);
489extern int lwkt_send_ipiq3_bycpu(int, ipifunc3_t, void *, int);
490extern int lwkt_send_ipiq3_mask(cpumask_t, ipifunc3_t, void *, int);
491extern void lwkt_wait_ipiq(struct globaldata *, int);
492extern int lwkt_seq_ipiq(struct globaldata *);
96728c05 493extern void lwkt_process_ipiq(void);
b9665ad7 494extern void lwkt_process_ipiq_frame(struct intrframe *);
b8a98473 495extern void lwkt_smp_stopped(void);
6c92c1f2 496extern void lwkt_synchronize_ipiqs(const char *);
b8a98473 497
d5b2d319 498/* lwkt_cpusync_init() - inline function in sys/thread2.h */
b9665ad7 499extern void lwkt_cpusync_simple(cpumask_t, cpusync_func_t, void *);
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500extern void lwkt_cpusync_interlock(lwkt_cpusync_t);
501extern void lwkt_cpusync_deinterlock(lwkt_cpusync_t);
b8a98473 502
4a28fe22 503extern void crit_panic(void) __dead2;
553ea3c8 504extern struct lwp *lwkt_preempted_proc(void);
4b5f931b 505
b9665ad7 506extern int lwkt_create (void (*func)(void *), void *, struct thread **,
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507 struct thread *, int, int,
508 const char *, ...) __printflike(7, 8);
b153f746 509extern void lwkt_exit (void) __dead2;
e56e4dea 510extern void lwkt_remove_tdallq (struct thread *);
99df837e 511
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512#endif
513
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514#endif
515