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1
/*
1
/*
2
 * Copyright (C) 2001-2004 Jakub Jermar
2
 * Copyright (C) 2001-2004 Jakub Jermar
3
 * All rights reserved.
3
 * All rights reserved.
4
 *
4
 *
5
 * Redistribution and use in source and binary forms, with or without
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
6
 * modification, are permitted provided that the following conditions
7
 * are met:
7
 * are met:
8
 *
8
 *
9
 * - Redistributions of source code must retain the above copyright
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
15
 *   derived from this software without specific prior written permission.
16
 *
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
27
 */
28
 
28
 
29
#include <proc/scheduler.h>
29
#include <proc/scheduler.h>
30
#include <proc/thread.h>
30
#include <proc/thread.h>
31
#include <proc/task.h>
31
#include <proc/task.h>
32
#include <mm/frame.h>
32
#include <mm/frame.h>
33
#include <mm/page.h>
33
#include <mm/page.h>
34
#include <arch/asm.h>
34
#include <arch/asm.h>
35
#include <arch.h>
35
#include <arch.h>
36
#include <synch/synch.h>
36
#include <synch/synch.h>
37
#include <synch/spinlock.h>
37
#include <synch/spinlock.h>
38
#include <synch/waitq.h>
38
#include <synch/waitq.h>
39
#include <synch/rwlock.h>
39
#include <synch/rwlock.h>
40
#include <cpu.h>
40
#include <cpu.h>
41
#include <func.h>
41
#include <func.h>
42
#include <context.h>
42
#include <context.h>
43
#include <adt/list.h>
43
#include <adt/list.h>
44
#include <typedefs.h>
44
#include <typedefs.h>
45
#include <time/clock.h>
45
#include <time/clock.h>
46
#include <adt/list.h>
46
#include <adt/list.h>
47
#include <config.h>
47
#include <config.h>
48
#include <arch/interrupt.h>
48
#include <arch/interrupt.h>
49
#include <smp/ipi.h>
49
#include <smp/ipi.h>
50
#include <arch/faddr.h>
50
#include <arch/faddr.h>
51
#include <arch/atomic.h>
51
#include <arch/atomic.h>
52
#include <memstr.h>
52
#include <memstr.h>
53
#include <print.h>
53
#include <print.h>
54
#include <mm/slab.h>
54
#include <mm/slab.h>
55
#include <debug.h>
55
#include <debug.h>
56
 
56
 
57
char *thread_states[] = {"Invalid", "Running", "Sleeping", "Ready", "Entering", "Exiting"}; /**< Thread states */
57
char *thread_states[] = {"Invalid", "Running", "Sleeping", "Ready", "Entering", "Exiting"}; /**< Thread states */
58
 
58
 
59
SPINLOCK_INITIALIZE(threads_lock);  /**< Lock protecting threads_head list. For locking rules, see declaration thereof. */
59
SPINLOCK_INITIALIZE(threads_lock);  /**< Lock protecting threads_head list. For locking rules, see declaration thereof. */
60
LIST_INITIALIZE(threads_head);      /**< List of all threads. */
60
LIST_INITIALIZE(threads_head);      /**< List of all threads. */
61
 
61
 
62
SPINLOCK_INITIALIZE(tidlock);
62
SPINLOCK_INITIALIZE(tidlock);
63
__u32 last_tid = 0;
63
__u32 last_tid = 0;
64
 
64
 
65
static slab_cache_t *thread_slab;
65
static slab_cache_t *thread_slab;
66
#ifdef ARCH_HAS_FPU
66
#ifdef ARCH_HAS_FPU
67
slab_cache_t *fpu_context_slab;
67
slab_cache_t *fpu_context_slab;
68
#endif
68
#endif
69
 
69
 
70
 
70
 
71
/** Thread wrapper
71
/** Thread wrapper
72
 *
72
 *
73
 * This wrapper is provided to ensure that every thread
73
 * This wrapper is provided to ensure that every thread
74
 * makes a call to thread_exit() when its implementing
74
 * makes a call to thread_exit() when its implementing
75
 * function returns.
75
 * function returns.
76
 *
76
 *
77
 * interrupts_disable() is assumed.
77
 * interrupts_disable() is assumed.
78
 *
78
 *
79
 */
79
 */
80
static void cushion(void)
80
static void cushion(void)
81
{
81
{
82
    void (*f)(void *) = THREAD->thread_code;
82
    void (*f)(void *) = THREAD->thread_code;
83
    void *arg = THREAD->thread_arg;
83
    void *arg = THREAD->thread_arg;
84
 
84
 
85
    /* this is where each thread wakes up after its creation */
85
    /* this is where each thread wakes up after its creation */
86
    before_thread_runs();
86
    before_thread_runs();
87
 
87
 
88
    spinlock_unlock(&THREAD->lock);
88
    spinlock_unlock(&THREAD->lock);
89
    interrupts_enable();
89
    interrupts_enable();
90
 
90
 
91
    f(arg);
91
    f(arg);
92
    thread_exit();
92
    thread_exit();
93
    /* not reached */
93
    /* not reached */
94
}
94
}
95
 
95
 
96
/** Initialization and allocation for thread_t structure */
96
/** Initialization and allocation for thread_t structure */
97
static int thr_constructor(void *obj, int kmflags)
97
static int thr_constructor(void *obj, int kmflags)
98
{
98
{
99
    thread_t *t = (thread_t *)obj;
99
    thread_t *t = (thread_t *)obj;
100
    pfn_t pfn;
100
    pfn_t pfn;
101
    int status;
101
    int status;
102
 
102
 
103
    spinlock_initialize(&t->lock, "thread_t_lock");
103
    spinlock_initialize(&t->lock, "thread_t_lock");
104
    link_initialize(&t->rq_link);
104
    link_initialize(&t->rq_link);
105
    link_initialize(&t->wq_link);
105
    link_initialize(&t->wq_link);
106
    link_initialize(&t->th_link);
106
    link_initialize(&t->th_link);
107
    link_initialize(&t->threads_link);
107
    link_initialize(&t->threads_link);
108
   
108
   
109
#ifdef ARCH_HAS_FPU
109
#ifdef ARCH_HAS_FPU
110
#  ifdef CONFIG_FPU_LAZY
110
#  ifdef CONFIG_FPU_LAZY
111
    t->saved_fpu_context = NULL;
111
    t->saved_fpu_context = NULL;
112
#  else
112
#  else
113
    t->saved_fpu_context = slab_alloc(fpu_context_slab,kmflags);
113
    t->saved_fpu_context = slab_alloc(fpu_context_slab,kmflags);
114
    if (!t->saved_fpu_context)
114
    if (!t->saved_fpu_context)
115
        return -1;
115
        return -1;
116
#  endif
116
#  endif
117
#endif  
117
#endif  
118
 
118
 
119
    pfn = frame_alloc_rc(STACK_FRAMES, FRAME_KA | kmflags,&status);
119
    pfn = frame_alloc_rc(STACK_FRAMES, FRAME_KA | kmflags,&status);
120
    if (status) {
120
    if (status) {
121
#ifdef ARCH_HAS_FPU
121
#ifdef ARCH_HAS_FPU
122
        if (t->saved_fpu_context)
122
        if (t->saved_fpu_context)
123
            slab_free(fpu_context_slab,t->saved_fpu_context);
123
            slab_free(fpu_context_slab,t->saved_fpu_context);
124
#endif
124
#endif
125
        return -1;
125
        return -1;
126
    }
126
    }
127
    t->kstack = (__u8 *)PA2KA(PFN2ADDR(pfn));
127
    t->kstack = (__u8 *)PA2KA(PFN2ADDR(pfn));
128
 
128
 
129
    return 0;
129
    return 0;
130
}
130
}
131
 
131
 
132
/** Destruction of thread_t object */
132
/** Destruction of thread_t object */
133
static int thr_destructor(void *obj)
133
static int thr_destructor(void *obj)
134
{
134
{
135
    thread_t *t = (thread_t *)obj;
135
    thread_t *t = (thread_t *)obj;
136
 
136
 
137
    frame_free(ADDR2PFN(KA2PA(t->kstack)));
137
    frame_free(ADDR2PFN(KA2PA(t->kstack)));
138
#ifdef ARCH_HAS_FPU
138
#ifdef ARCH_HAS_FPU
139
    if (t->saved_fpu_context)
139
    if (t->saved_fpu_context)
140
        slab_free(fpu_context_slab,t->saved_fpu_context);
140
        slab_free(fpu_context_slab,t->saved_fpu_context);
141
#endif
141
#endif
142
    return 1; /* One page freed */
142
    return 1; /* One page freed */
143
}
143
}
144
 
144
 
145
/** Initialize threads
145
/** Initialize threads
146
 *
146
 *
147
 * Initialize kernel threads support.
147
 * Initialize kernel threads support.
148
 *
148
 *
149
 */
149
 */
150
void thread_init(void)
150
void thread_init(void)
151
{
151
{
152
    THREAD = NULL;
152
    THREAD = NULL;
153
    atomic_set(&nrdy,0);
153
    atomic_set(&nrdy,0);
154
    thread_slab = slab_cache_create("thread_slab",
154
    thread_slab = slab_cache_create("thread_slab",
155
                    sizeof(thread_t),0,
155
                    sizeof(thread_t),0,
156
                    thr_constructor, thr_destructor, 0);
156
                    thr_constructor, thr_destructor, 0);
157
#ifdef ARCH_HAS_FPU
157
#ifdef ARCH_HAS_FPU
158
    fpu_context_slab = slab_cache_create("fpu_slab",
158
    fpu_context_slab = slab_cache_create("fpu_slab",
159
                         sizeof(fpu_context_t),
159
                         sizeof(fpu_context_t),
160
                         FPU_CONTEXT_ALIGN,
160
                         FPU_CONTEXT_ALIGN,
161
                         NULL, NULL, 0);
161
                         NULL, NULL, 0);
162
#endif
162
#endif
163
}
163
}
164
 
164
 
165
 
165
 
166
/** Make thread ready
166
/** Make thread ready
167
 *
167
 *
168
 * Switch thread t to the ready state.
168
 * Switch thread t to the ready state.
169
 *
169
 *
170
 * @param t Thread to make ready.
170
 * @param t Thread to make ready.
171
 *
171
 *
172
 */
172
 */
173
void thread_ready(thread_t *t)
173
void thread_ready(thread_t *t)
174
{
174
{
175
    cpu_t *cpu;
175
    cpu_t *cpu;
176
    runq_t *r;
176
    runq_t *r;
177
    ipl_t ipl;
177
    ipl_t ipl;
178
    int i, avg;
178
    int i, avg;
179
 
179
 
180
    ipl = interrupts_disable();
180
    ipl = interrupts_disable();
181
 
181
 
182
    spinlock_lock(&t->lock);
182
    spinlock_lock(&t->lock);
183
 
183
 
184
    i = (t->priority < RQ_COUNT -1) ? ++t->priority : t->priority;
184
    i = (t->priority < RQ_COUNT -1) ? ++t->priority : t->priority;
185
   
185
   
186
    cpu = CPU;
186
    cpu = CPU;
187
    if (t->flags & X_WIRED) {
187
    if (t->flags & X_WIRED) {
188
        cpu = t->cpu;
188
        cpu = t->cpu;
189
    }
189
    }
190
    spinlock_unlock(&t->lock);
190
    spinlock_unlock(&t->lock);
191
   
191
   
192
    /*
192
    /*
193
     * Append t to respective ready queue on respective processor.
193
     * Append t to respective ready queue on respective processor.
194
     */
194
     */
195
    r = &cpu->rq[i];
195
    r = &cpu->rq[i];
196
    spinlock_lock(&r->lock);
196
    spinlock_lock(&r->lock);
197
    list_append(&t->rq_link, &r->rq_head);
197
    list_append(&t->rq_link, &r->rq_head);
198
    r->n++;
198
    r->n++;
199
    spinlock_unlock(&r->lock);
199
    spinlock_unlock(&r->lock);
200
 
200
 
201
    atomic_inc(&nrdy);
201
    atomic_inc(&nrdy);
202
    avg = atomic_get(&nrdy) / config.cpu_active;
202
    avg = atomic_get(&nrdy) / config.cpu_active;
203
    atomic_inc(&cpu->nrdy);
203
    atomic_inc(&cpu->nrdy);
204
 
204
 
205
    interrupts_restore(ipl);
205
    interrupts_restore(ipl);
206
}
206
}
207
 
207
 
208
 
208
 
209
/** Destroy thread memory structure
209
/** Destroy thread memory structure
210
 *
210
 *
211
 * Detach thread from all queues, cpus etc. and destroy it.
211
 * Detach thread from all queues, cpus etc. and destroy it.
212
 *
212
 *
213
 * Assume thread->lock is held!!
213
 * Assume thread->lock is held!!
214
 */
214
 */
215
void thread_destroy(thread_t *t)
215
void thread_destroy(thread_t *t)
216
{
216
{
217
    ASSERT(t->state == Exiting);
217
    ASSERT(t->state == Exiting);
218
    ASSERT(t->task);
218
    ASSERT(t->task);
219
    ASSERT(t->cpu);
219
    ASSERT(t->cpu);
220
 
220
 
221
    spinlock_lock(&t->cpu->lock);
221
    spinlock_lock(&t->cpu->lock);
222
    if(t->cpu->fpu_owner==t)
222
    if(t->cpu->fpu_owner==t)
223
        t->cpu->fpu_owner=NULL;
223
        t->cpu->fpu_owner=NULL;
224
    spinlock_unlock(&t->cpu->lock);
224
    spinlock_unlock(&t->cpu->lock);
225
 
225
 
226
    /*
226
    /*
227
     * Detach from the containing task.
227
     * Detach from the containing task.
228
     */
228
     */
229
    spinlock_lock(&t->task->lock);
229
    spinlock_lock(&t->task->lock);
230
    list_remove(&t->th_link);
230
    list_remove(&t->th_link);
231
    spinlock_unlock(&t->task->lock);
231
    spinlock_unlock(&t->task->lock);
232
   
232
   
233
    spinlock_unlock(&t->lock);
233
    spinlock_unlock(&t->lock);
234
   
234
   
235
    spinlock_lock(&threads_lock);
235
    spinlock_lock(&threads_lock);
236
    list_remove(&t->threads_link);
236
    list_remove(&t->threads_link);
237
    spinlock_unlock(&threads_lock);
237
    spinlock_unlock(&threads_lock);
238
   
238
   
239
    slab_free(thread_slab, t);
239
    slab_free(thread_slab, t);
240
}
240
}
241
 
241
 
242
 
242
 
243
/** Create new thread
243
/** Create new thread
244
 *
244
 *
245
 * Create a new thread.
245
 * Create a new thread.
246
 *
246
 *
247
 * @param func  Thread's implementing function.
247
 * @param func  Thread's implementing function.
248
 * @param arg   Thread's implementing function argument.
248
 * @param arg   Thread's implementing function argument.
249
 * @param task  Task to which the thread belongs.
249
 * @param task  Task to which the thread belongs.
250
 * @param flags Thread flags.
250
 * @param flags Thread flags.
251
 *
251
 *
252
 * @return New thread's structure on success, NULL on failure.
252
 * @return New thread's structure on success, NULL on failure.
253
 *
253
 *
254
 */
254
 */
255
thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags)
255
thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags)
256
{
256
{
257
    thread_t *t;
257
    thread_t *t;
258
    ipl_t ipl;
258
    ipl_t ipl;
259
   
259
   
260
    t = (thread_t *) slab_alloc(thread_slab, 0);
260
    t = (thread_t *) slab_alloc(thread_slab, 0);
261
    if (!t)
261
    if (!t)
262
        return NULL;
262
        return NULL;
263
   
263
   
264
    /* Not needed, but good for debugging */
264
    /* Not needed, but good for debugging */
265
    memsetb((__address)t->kstack, THREAD_STACK_SIZE, 0);
265
    memsetb((__address)t->kstack, THREAD_STACK_SIZE, 0);
266
   
266
   
267
    ipl = interrupts_disable();
267
    ipl = interrupts_disable();
268
    spinlock_lock(&tidlock);
268
    spinlock_lock(&tidlock);
269
    t->tid = ++last_tid;
269
    t->tid = ++last_tid;
270
    spinlock_unlock(&tidlock);
270
    spinlock_unlock(&tidlock);
271
    interrupts_restore(ipl);
271
    interrupts_restore(ipl);
272
   
272
   
273
    context_save(&t->saved_context);
273
    context_save(&t->saved_context);
274
    context_set(&t->saved_context, FADDR(cushion), (__address) t->kstack, THREAD_STACK_SIZE);
274
    context_set(&t->saved_context, FADDR(cushion), (__address) t->kstack, THREAD_STACK_SIZE);
275
   
275
   
276
    the_initialize((the_t *) t->kstack);
276
    the_initialize((the_t *) t->kstack);
277
   
277
   
278
    ipl = interrupts_disable();
278
    ipl = interrupts_disable();
279
    t->saved_context.ipl = interrupts_read();
279
    t->saved_context.ipl = interrupts_read();
280
    interrupts_restore(ipl);
280
    interrupts_restore(ipl);
281
   
281
   
282
    t->thread_code = func;
282
    t->thread_code = func;
283
    t->thread_arg = arg;
283
    t->thread_arg = arg;
284
    t->ticks = -1;
284
    t->ticks = -1;
285
    t->priority = -1;       /* start in rq[0] */
285
    t->priority = -1;       /* start in rq[0] */
286
    t->cpu = NULL;
286
    t->cpu = NULL;
287
    t->flags = 0;
287
    t->flags = 0;
288
    t->state = Entering;
288
    t->state = Entering;
289
    t->call_me = NULL;
289
    t->call_me = NULL;
290
    t->call_me_with = NULL;
290
    t->call_me_with = NULL;
291
   
291
   
292
    timeout_initialize(&t->sleep_timeout);
292
    timeout_initialize(&t->sleep_timeout);
293
    t->sleep_queue = NULL;
293
    t->sleep_queue = NULL;
294
    t->timeout_pending = 0;
294
    t->timeout_pending = 0;
295
   
295
   
296
    t->rwlock_holder_type = RWLOCK_NONE;
296
    t->rwlock_holder_type = RWLOCK_NONE;
297
       
297
       
298
    t->task = task;
298
    t->task = task;
299
   
299
   
300
    t->fpu_context_exists = 0;
300
    t->fpu_context_exists = 0;
301
    t->fpu_context_engaged = 0;
301
    t->fpu_context_engaged = 0;
302
   
302
   
303
    /*
303
    /*
304
     * Register this thread in the system-wide list.
304
     * Register this thread in the system-wide list.
305
     */
305
     */
306
    ipl = interrupts_disable();
306
    ipl = interrupts_disable();
307
    spinlock_lock(&threads_lock);
307
    spinlock_lock(&threads_lock);
308
    list_append(&t->threads_link, &threads_head);
308
    list_append(&t->threads_link, &threads_head);
309
    spinlock_unlock(&threads_lock);
309
    spinlock_unlock(&threads_lock);
310
   
310
   
311
    /*
311
    /*
312
     * Attach to the containing task.
312
     * Attach to the containing task.
313
     */
313
     */
314
    spinlock_lock(&task->lock);
314
    spinlock_lock(&task->lock);
315
    list_append(&t->th_link, &task->th_head);
315
    list_append(&t->th_link, &task->th_head);
316
    spinlock_unlock(&task->lock);
316
    spinlock_unlock(&task->lock);
317
   
317
   
318
    interrupts_restore(ipl);
318
    interrupts_restore(ipl);
319
   
319
   
320
    return t;
320
    return t;
321
}
321
}
322
 
322
 
323
 
323
 
324
/** Make thread exiting
324
/** Make thread exiting
325
 *
325
 *
326
 * End current thread execution and switch it to the exiting
326
 * End current thread execution and switch it to the exiting
327
 * state. All pending timeouts are executed.
327
 * state. All pending timeouts are executed.
328
 *
328
 *
329
 */
329
 */
330
void thread_exit(void)
330
void thread_exit(void)
331
{
331
{
332
    ipl_t ipl;
332
    ipl_t ipl;
333
 
333
 
334
restart:
334
restart:
335
    ipl = interrupts_disable();
335
    ipl = interrupts_disable();
336
    spinlock_lock(&THREAD->lock);
336
    spinlock_lock(&THREAD->lock);
337
    if (THREAD->timeout_pending) { /* busy waiting for timeouts in progress */
337
    if (THREAD->timeout_pending) { /* busy waiting for timeouts in progress */
338
        spinlock_unlock(&THREAD->lock);
338
        spinlock_unlock(&THREAD->lock);
339
        interrupts_restore(ipl);
339
        interrupts_restore(ipl);
340
        goto restart;
340
        goto restart;
341
    }
341
    }
342
    THREAD->state = Exiting;
342
    THREAD->state = Exiting;
343
    spinlock_unlock(&THREAD->lock);
343
    spinlock_unlock(&THREAD->lock);
344
    scheduler();
344
    scheduler();
345
}
345
}
346
 
346
 
347
 
347
 
348
/** Thread sleep
348
/** Thread sleep
349
 *
349
 *
350
 * Suspend execution of the current thread.
350
 * Suspend execution of the current thread.
351
 *
351
 *
352
 * @param sec Number of seconds to sleep.
352
 * @param sec Number of seconds to sleep.
353
 *
353
 *
354
 */
354
 */
355
void thread_sleep(__u32 sec)
355
void thread_sleep(__u32 sec)
356
{
356
{
357
    thread_usleep(sec*1000000);
357
    thread_usleep(sec*1000000);
358
}
358
}
359
 
359
 
360
 
360
 
361
/** Thread usleep
361
/** Thread usleep
362
 *
362
 *
363
 * Suspend execution of the current thread.
363
 * Suspend execution of the current thread.
364
 *
364
 *
365
 * @param usec Number of microseconds to sleep.
365
 * @param usec Number of microseconds to sleep.
366
 *
366
 *
367
 */
367
 */
368
void thread_usleep(__u32 usec)
368
void thread_usleep(__u32 usec)
369
{
369
{
370
    waitq_t wq;
370
    waitq_t wq;
371
                 
371
                 
372
    waitq_initialize(&wq);
372
    waitq_initialize(&wq);
373
 
373
 
374
    (void) waitq_sleep_timeout(&wq, usec, SYNCH_NON_BLOCKING);
374
    (void) waitq_sleep_timeout(&wq, usec, SYNCH_NON_BLOCKING);
375
}
375
}
376
 
376
 
377
 
377
 
378
/** Register thread out-of-context invocation
378
/** Register thread out-of-context invocation
379
 *
379
 *
380
 * Register a function and its argument to be executed
380
 * Register a function and its argument to be executed
381
 * on next context switch to the current thread.
381
 * on next context switch to the current thread.
382
 *
382
 *
383
 * @param call_me      Out-of-context function.
383
 * @param call_me      Out-of-context function.
384
 * @param call_me_with Out-of-context function argument.
384
 * @param call_me_with Out-of-context function argument.
385
 *
385
 *
386
 */
386
 */
387
void thread_register_call_me(void (* call_me)(void *), void *call_me_with)
387
void thread_register_call_me(void (* call_me)(void *), void *call_me_with)
388
{
388
{
389
    ipl_t ipl;
389
    ipl_t ipl;
390
   
390
   
391
    ipl = interrupts_disable();
391
    ipl = interrupts_disable();
392
    spinlock_lock(&THREAD->lock);
392
    spinlock_lock(&THREAD->lock);
393
    THREAD->call_me = call_me;
393
    THREAD->call_me = call_me;
394
    THREAD->call_me_with = call_me_with;
394
    THREAD->call_me_with = call_me_with;
395
    spinlock_unlock(&THREAD->lock);
395
    spinlock_unlock(&THREAD->lock);
396
    interrupts_restore(ipl);
396
    interrupts_restore(ipl);
397
}
397
}
398
 
398
 
399
/** Print list of threads debug info */
399
/** Print list of threads debug info */
400
void thread_print_list(void)
400
void thread_print_list(void)
401
{
401
{
402
    link_t *cur;
402
    link_t *cur;
403
    thread_t *t;
403
    thread_t *t;
404
    ipl_t ipl;
404
    ipl_t ipl;
405
   
405
   
406
    /* Messing with thread structures, avoid deadlock */
406
    /* Messing with thread structures, avoid deadlock */
407
    ipl = interrupts_disable();
407
    ipl = interrupts_disable();
408
    spinlock_lock(&threads_lock);
408
    spinlock_lock(&threads_lock);
409
 
409
 
410
    for (cur=threads_head.next; cur!=&threads_head; cur=cur->next) {
410
    for (cur=threads_head.next; cur!=&threads_head; cur=cur->next) {
411
        t = list_get_instance(cur, thread_t, threads_link);
411
        t = list_get_instance(cur, thread_t, threads_link);
412
        printf("Thr: %d(%s) ", t->tid, thread_states[t->state]);
412
        printf("Thr: %d(%s) ", t->tid, thread_states[t->state]);
413
        if (t->cpu)
413
        if (t->cpu)
414
            printf("cpu%d ", t->cpu->id);
414
            printf("cpu%d ", t->cpu->id);
415
       
-
 
416
        printf("\n");
415
        printf("\n");
417
    }
416
    }
418
 
417
 
419
    spinlock_unlock(&threads_lock);
418
    spinlock_unlock(&threads_lock);
420
    interrupts_enable();
419
    interrupts_restore(ipl);
421
}
420
}
422
 
421