Rev 5130 | Rev 5344 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
2288 | clevermous | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
||
2455 | mario79 | 3 | ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;; |
2288 | clevermous | 4 | ;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa ;; |
5 | ;; Distributed under terms of the GNU General Public License ;; |
||
6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
||
7 | |||
8 | $Revision: 5343 $ |
||
9 | |||
10 | |||
11 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
||
12 | ;; IRQ0 HANDLER (TIMER INTERRUPT) ;; |
||
13 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
||
14 | |||
15 | |||
16 | align 32 |
||
17 | irq0: |
||
18 | pushad |
||
19 | Mov ds, ax, app_data |
||
20 | mov es, ax |
||
21 | inc [timer_ticks] |
||
22 | mov eax, [timer_ticks] |
||
23 | call playNote ; <<<--- Speaker driver |
||
24 | sub eax, [next_usage_update] |
||
25 | cmp eax, 100 |
||
26 | jb .nocounter |
||
27 | add [next_usage_update], 100 |
||
28 | call updatecputimes |
||
29 | .nocounter: |
||
30 | xor ecx, ecx ; send End Of Interrupt signal |
||
31 | call irq_eoi |
||
4700 | mario79 | 32 | |
3615 | clevermous | 33 | mov bl, SCHEDULE_ANY_PRIORITY |
2288 | clevermous | 34 | call find_next_task |
35 | jz .return ; if there is only one running process |
||
36 | call do_change_task |
||
37 | .return: |
||
38 | popad |
||
39 | iretd |
||
40 | |||
41 | align 4 |
||
42 | change_task: |
||
43 | pushfd |
||
44 | cli |
||
45 | pushad |
||
3615 | clevermous | 46 | mov bl, SCHEDULE_ANY_PRIORITY |
2288 | clevermous | 47 | call find_next_task |
48 | jz .return ; the same task -> skip switch |
||
4700 | mario79 | 49 | |
2288 | clevermous | 50 | call do_change_task |
51 | .return: |
||
52 | popad |
||
53 | popfd |
||
54 | ret |
||
55 | |||
56 | uglobal |
||
57 | align 4 |
||
58 | ; far_jump: |
||
59 | ; .offs dd ? |
||
60 | ; .sel dw ? |
||
61 | context_counter dd 0 ;noname & halyavin |
||
62 | next_usage_update dd 0 |
||
63 | timer_ticks dd 0 |
||
64 | ; prev_slot dd ? |
||
65 | ; event_sched dd ? |
||
66 | endg |
||
67 | |||
68 | align 4 |
||
69 | update_counters: |
||
70 | mov edi, [TASK_BASE] |
||
71 | rdtsc |
||
72 | sub eax, [edi+TASKDATA.counter_add] ; time stamp counter add |
||
73 | add [edi+TASKDATA.counter_sum], eax ; counter sum |
||
74 | ret |
||
75 | align 4 |
||
76 | updatecputimes: |
||
77 | mov ecx, [TASK_COUNT] |
||
78 | mov edi, TASK_DATA |
||
79 | .newupdate: |
||
80 | xor eax, eax |
||
81 | xchg eax, [edi+TASKDATA.counter_sum] |
||
82 | mov [edi+TASKDATA.cpu_usage], eax |
||
83 | add edi, 0x20 |
||
84 | loop .newupdate |
||
85 | ret |
||
86 | |||
3539 | clevermous | 87 | ;TODO: Надо бы убрать использование do_change_task из V86... |
88 | ; и после этого перенести обработку TASKDATA.counter_add/sum в do_change_task |
||
2288 | clevermous | 89 | |
90 | align 4 |
||
91 | do_change_task: |
||
92 | ;param: |
||
93 | ; ebx = address of the APPDATA for incoming task (new) |
||
94 | ;warning: |
||
95 | ; [CURRENT_TASK] and [TASK_BASE] must be changed before (e.g. in find_next_task) |
||
96 | ; [current_slot] is the outcoming (old), and set here to a new value (ebx) |
||
97 | ;scratched: eax,ecx,esi |
||
98 | mov esi, ebx |
||
99 | xchg esi, [current_slot] |
||
100 | ; set new stack after saving old |
||
101 | mov [esi+APPDATA.saved_esp], esp |
||
102 | mov esp, [ebx+APPDATA.saved_esp] |
||
103 | ; set new thread io-map |
||
104 | Mov dword [page_tabs+((tss._io_map_0 and -4096) shr 10)],eax,[ebx+APPDATA.io_map] |
||
105 | Mov dword [page_tabs+((tss._io_map_1 and -4096) shr 10)],eax,[ebx+APPDATA.io_map+4] |
||
106 | ; set new thread memory-map |
||
5130 | serge | 107 | mov eax, [ebx+APPDATA.process] |
108 | cmp eax, [current_process] |
||
2288 | clevermous | 109 | je @f |
5130 | serge | 110 | mov [current_process], eax |
111 | mov eax, [eax+PROC.pdt_0_phys] |
||
2288 | clevermous | 112 | mov cr3, eax |
113 | @@: |
||
114 | ; set tss.esp0 |
||
115 | |||
116 | Mov [tss._esp0],eax,[ebx+APPDATA.saved_esp0] |
||
117 | |||
118 | mov edx, [ebx+APPDATA.tls_base] |
||
119 | cmp edx, [esi+APPDATA.tls_base] |
||
120 | je @f |
||
121 | |||
122 | mov [tls_data_l+2], dx |
||
123 | shr edx, 16 |
||
124 | mov [tls_data_l+4], dl |
||
125 | mov [tls_data_l+7], dh |
||
126 | |||
127 | mov dx, app_tls |
||
128 | mov fs, dx |
||
129 | @@: |
||
130 | ; set gs selector unconditionally |
||
131 | Mov gs,ax,graph_data |
||
132 | ; set CR0.TS |
||
133 | cmp bh, byte[fpu_owner] ;bh == incoming task (new) |
||
134 | clts ;clear a task switch flag |
||
135 | je @f |
||
136 | mov eax, cr0 ;and set it again if the owner |
||
137 | or eax, CR0_TS ;of a fpu has changed |
||
138 | mov cr0, eax |
||
139 | @@: ; set context_counter (only for user pleasure ???) |
||
140 | inc [context_counter] ;noname & halyavin |
||
141 | ; set debug-registers, if it's necessary |
||
142 | test byte[ebx+APPDATA.dbg_state], 1 |
||
143 | jz @f |
||
144 | xor eax, eax |
||
145 | mov dr6, eax |
||
5130 | serge | 146 | lea esi, [ebx+APPDATA.dbg_regs] |
2288 | clevermous | 147 | cld |
148 | macro lodsReg [reg] { |
||
149 | lodsd |
||
150 | mov reg, eax |
||
151 | } lodsReg dr0, dr1, dr2, dr3, dr7 |
||
152 | purge lodsReg |
||
153 | @@: |
||
154 | ret |
||
155 | ;end. |
||
156 | |||
157 | |||
158 | |||
2381 | hidnplayr | 159 | struct MUTEX_WAITER |
160 | list LHEAD |
||
161 | task dd ? |
||
5343 | serge | 162 | type dd ? |
2381 | hidnplayr | 163 | ends |
2288 | clevermous | 164 | |
165 | ;void __fastcall mutex_init(struct mutex *lock) |
||
166 | |||
167 | align 4 |
||
168 | mutex_init: |
||
5343 | serge | 169 | mov [ecx+MUTEX.wait_list.next], ecx |
170 | mov [ecx+MUTEX.wait_list.prev], ecx |
||
2288 | clevermous | 171 | mov [ecx+MUTEX.count], 1 |
172 | ret |
||
173 | |||
174 | ;void __fastcall mutex_lock(struct mutex *lock) |
||
175 | |||
176 | align 4 |
||
177 | mutex_lock: |
||
178 | |||
179 | dec [ecx+MUTEX.count] |
||
180 | jns .done |
||
181 | |||
182 | pushfd |
||
183 | cli |
||
184 | |||
2381 | hidnplayr | 185 | sub esp, sizeof.MUTEX_WAITER |
2288 | clevermous | 186 | |
187 | list_add_tail esp, ecx ;esp= new waiter, ecx= list head |
||
188 | |||
189 | mov edx, [TASK_BASE] |
||
190 | mov [esp+MUTEX_WAITER.task], edx |
||
191 | |||
192 | .forever: |
||
193 | |||
194 | mov eax, -1 |
||
195 | xchg eax, [ecx+MUTEX.count] |
||
196 | dec eax |
||
197 | jz @F |
||
198 | |||
199 | mov [edx+TASKDATA.state], 1 |
||
200 | call change_task |
||
201 | jmp .forever |
||
202 | @@: |
||
5343 | serge | 203 | mov eax, ecx |
204 | list_del esp |
||
2288 | clevermous | 205 | |
5343 | serge | 206 | cmp [eax+MUTEX.wait_list.next], eax |
2288 | clevermous | 207 | jne @F |
208 | |||
5343 | serge | 209 | mov [eax+MUTEX.count], 0 |
2288 | clevermous | 210 | @@: |
2381 | hidnplayr | 211 | add esp, sizeof.MUTEX_WAITER |
2288 | clevermous | 212 | |
213 | popfd |
||
214 | .done: |
||
215 | ret |
||
216 | |||
217 | ;void __fastcall mutex_unlock(struct mutex *lock) |
||
218 | |||
219 | align 4 |
||
220 | mutex_unlock: |
||
221 | |||
222 | pushfd |
||
223 | cli |
||
224 | |||
5343 | serge | 225 | mov eax, [ecx+MUTEX.wait_list.next] |
2288 | clevermous | 226 | cmp eax, ecx |
227 | mov [ecx+MUTEX.count], 1 |
||
228 | je @F |
||
229 | |||
230 | mov eax, [eax+MUTEX_WAITER.task] |
||
231 | mov [eax+TASKDATA.state], 0 |
||
232 | @@: |
||
233 | popfd |
||
234 | ret |
||
235 | |||
236 | |||
5343 | serge | 237 | ;void __fastcall down_read(struct rw_semaphore *sem) |
238 | |||
239 | align 4 |
||
240 | down_read: |
||
241 | pushfd |
||
242 | cli |
||
243 | |||
244 | mov eax, [ecx+RWSEM.count] |
||
245 | test eax, eax |
||
246 | js @F |
||
247 | |||
248 | cmp ecx, [ecx+RWSEM.wait_list.next] |
||
249 | je .ok |
||
250 | @@: |
||
251 | sub esp, sizeof.MUTEX_WAITER |
||
252 | |||
253 | mov eax, [TASK_BASE] |
||
254 | mov [esp+MUTEX_WAITER.task], eax |
||
255 | mov [esp+MUTEX_WAITER.type], 1; RWSEM_WAITING_FOR_READ |
||
256 | mov [eax+TASKDATA.state], 1 |
||
257 | |||
258 | list_add_tail esp, ecx ;esp= new waiter, ecx= list head |
||
259 | |||
260 | call change_task |
||
261 | |||
262 | add esp, sizeof.MUTEX_WAITER |
||
263 | popfd |
||
264 | ret |
||
265 | .ok: |
||
266 | inc eax |
||
267 | mov [ecx+RWSEM.count], eax |
||
268 | |||
269 | popfd |
||
270 | ret |
||
271 | |||
272 | ;void __fastcall down_write(struct rw_semaphore *sem) |
||
273 | |||
274 | align 4 |
||
275 | down_write: |
||
276 | pushfd |
||
277 | cli |
||
278 | sub esp, sizeof.MUTEX_WAITER |
||
279 | |||
280 | mov edx, [TASK_BASE] |
||
281 | mov [esp+MUTEX_WAITER.task], edx |
||
282 | mov [esp+MUTEX_WAITER.type], 2; RWSEM_WAITING_FOR_WRITE |
||
283 | mov [edx+TASKDATA.state], 1 |
||
284 | |||
285 | list_add_tail esp, ecx ;esp= new waiter, ecx= list head |
||
286 | |||
287 | xor eax, eax |
||
288 | not eax |
||
289 | |||
290 | .forever: |
||
291 | test eax, [ecx+RWSEM.count] |
||
292 | jz @F |
||
293 | |||
294 | mov [edx+TASKDATA.state], 1 |
||
295 | call change_task |
||
296 | jmp .forever |
||
297 | @@: |
||
298 | mov [ecx+RWSEM.count], eax |
||
299 | list_del esp |
||
300 | |||
301 | add esp, sizeof.MUTEX_WAITER |
||
302 | popfd |
||
303 | ret |
||
304 | |||
2288 | clevermous | 305 | purge MUTEX_WAITER |
306 | |||
3534 | clevermous | 307 | MAX_PRIORITY = 0 ; highest, used for kernel tasks |
308 | USER_PRIORITY = 1 ; default |
||
309 | IDLE_PRIORITY = 2 ; lowest, only IDLE thread goes here |
||
310 | NR_SCHED_QUEUES = 3 ; MUST equal IDLE_PRIORYTY + 1 |
||
311 | |||
312 | uglobal |
||
313 | ; [scheduler_current + i*4] = zero if there are no threads with priority i, |
||
314 | ; pointer to APPDATA of the current thread with priority i otherwise. |
||
315 | align 4 |
||
316 | scheduler_current rd NR_SCHED_QUEUES |
||
317 | endg |
||
318 | |||
319 | ; Add the given thread to the given priority list for the scheduler. |
||
320 | ; in: edx -> APPDATA, ecx = priority |
||
321 | proc scheduler_add_thread |
||
322 | ; 1. Acquire the lock. |
||
323 | spin_lock_irqsave SchedulerLock |
||
324 | ; 2. Store the priority in APPDATA structure. |
||
325 | mov [edx+APPDATA.priority], ecx |
||
326 | ; 3. There are two different cases: the given list is empty or not empty. |
||
327 | ; In first case, go to 6. Otherwise, advance to 4. |
||
328 | mov eax, [scheduler_current+ecx*4] |
||
329 | test eax, eax |
||
330 | jz .new_list |
||
331 | ; 4. Insert the new item immediately before the current item. |
||
332 | mov ecx, [eax+APPDATA.in_schedule.prev] |
||
333 | mov [edx+APPDATA.in_schedule.next], eax |
||
334 | mov [edx+APPDATA.in_schedule.prev], ecx |
||
335 | mov [eax+APPDATA.in_schedule.prev], edx |
||
336 | mov [ecx+APPDATA.in_schedule.next], edx |
||
337 | ; 5. Release the lock and return. |
||
338 | spin_unlock_irqrestore SchedulerLock |
||
339 | ret |
||
340 | .new_list: |
||
341 | ; 6. Initialize the list with one item and make it the current item. |
||
342 | mov [edx+APPDATA.in_schedule.next], edx |
||
343 | mov [edx+APPDATA.in_schedule.prev], edx |
||
344 | mov [scheduler_current+ecx*4], edx |
||
345 | ; 7. Release the lock and return. |
||
346 | spin_unlock_irqrestore SchedulerLock |
||
347 | ret |
||
348 | endp |
||
349 | |||
350 | ; Remove the given thread from the corresponding priority list for the scheduler. |
||
351 | ; in: edx -> APPDATA |
||
352 | proc scheduler_remove_thread |
||
353 | ; 1. Acquire the lock. |
||
354 | spin_lock_irqsave SchedulerLock |
||
355 | ; 2. Remove the item from the corresponding list. |
||
356 | mov eax, [edx+APPDATA.in_schedule.next] |
||
357 | mov ecx, [edx+APPDATA.in_schedule.prev] |
||
358 | mov [eax+APPDATA.in_schedule.prev], ecx |
||
359 | mov [ecx+APPDATA.in_schedule.next], eax |
||
360 | ; 3. If the given thread is the current item in the list, |
||
361 | ; advance the current item. |
||
362 | ; 3a. Check whether the given thread is the current item; |
||
363 | ; if no, skip the rest of this step. |
||
364 | mov ecx, [edx+APPDATA.priority] |
||
365 | cmp [scheduler_current+ecx*4], edx |
||
366 | jnz .return |
||
367 | ; 3b. Set the current item to eax; step 2 has set eax = next item. |
||
368 | mov [scheduler_current+ecx*4], eax |
||
369 | ; 3c. If there were only one item in the list, zero the current item. |
||
370 | cmp eax, edx |
||
371 | jnz .return |
||
372 | mov [scheduler_current+ecx*4], 0 |
||
373 | .return: |
||
374 | ; 4. Release the lock and return. |
||
375 | spin_unlock_irqrestore SchedulerLock |
||
376 | ret |
||
377 | endp |
||
378 | |||
3615 | clevermous | 379 | SCHEDULE_ANY_PRIORITY = 0 |
380 | SCHEDULE_HIGHER_PRIORITY = 1 |
||
3534 | clevermous | 381 | ;info: |
382 | ; Find next task to execute |
||
3615 | clevermous | 383 | ;in: |
384 | ; bl = SCHEDULE_ANY_PRIORITY: |
||
385 | ; consider threads with any priority |
||
386 | ; bl = SCHEDULE_HIGHER_PRIORITY: |
||
387 | ; consider only threads with strictly higher priority than the current one, |
||
388 | ; keep running the current thread if other ready threads have the same or lower priority |
||
3534 | clevermous | 389 | ;retval: |
390 | ; ebx = address of the APPDATA for the selected task (slot-base) |
||
391 | ; edi = address of the TASKDATA for the selected task |
||
392 | ; ZF = 1 if the task is the same |
||
393 | ;warning: |
||
394 | ; [CURRENT_TASK] = bh , [TASK_BASE] = edi -- as result |
||
395 | ; [current_slot] is not set to new value (ebx)!!! |
||
396 | ;scratched: eax,ecx |
||
397 | proc find_next_task |
||
398 | call update_counters |
||
399 | spin_lock_irqsave SchedulerLock |
||
3615 | clevermous | 400 | push NR_SCHED_QUEUES |
401 | ; If bl == SCHEDULE_ANY_PRIORITY = 0, loop over all NR_SCHED lists. |
||
402 | ; Otherwise, loop over first [APPDATA.priority] lists. |
||
403 | test bl, bl |
||
404 | jz .start |
||
405 | mov ebx, [current_slot] |
||
406 | mov edi, [TASK_BASE] |
||
407 | mov eax, [ebx+APPDATA.priority] |
||
408 | test eax, eax |
||
409 | jz .unlock_found |
||
410 | mov [esp], eax |
||
411 | .start: |
||
3534 | clevermous | 412 | xor ecx, ecx |
413 | .priority_loop: |
||
414 | mov ebx, [scheduler_current+ecx*4] |
||
415 | test ebx, ebx |
||
416 | jz .priority_next |
||
417 | .task_loop: |
||
418 | mov ebx, [ebx+APPDATA.in_schedule.next] |
||
419 | mov edi, ebx |
||
420 | shr edi, 3 |
||
421 | add edi, CURRENT_TASK - (SLOT_BASE shr 3) |
||
422 | mov al, [edi+TASKDATA.state] |
||
423 | test al, al |
||
424 | jz .task_found ; state == 0 |
||
425 | cmp al, 5 |
||
426 | jne .task_next ; state == 1,2,3,4,9 |
||
427 | ; state == 5 |
||
428 | pushad ; more freedom for [APPDATA.wait_test] |
||
429 | call [ebx+APPDATA.wait_test] |
||
430 | mov [esp+28], eax |
||
431 | popad |
||
432 | or eax, eax |
||
433 | jnz @f |
||
434 | ; testing for timeout |
||
435 | mov eax, [timer_ticks] |
||
436 | sub eax, [ebx+APPDATA.wait_begin] |
||
437 | cmp eax, [ebx+APPDATA.wait_timeout] |
||
438 | jb .task_next |
||
439 | xor eax, eax |
||
440 | @@: |
||
441 | mov [ebx+APPDATA.wait_param], eax ; retval for wait |
||
442 | mov [edi+TASKDATA.state], 0 |
||
443 | .task_found: |
||
444 | mov [scheduler_current+ecx*4], ebx |
||
3617 | clevermous | 445 | ; If we have selected a thread with higher priority |
446 | ; AND rescheduling is due to IRQ, |
||
447 | ; turn the current scheduler list one entry back, |
||
448 | ; so the current thread will be next after high-priority thread is done. |
||
449 | mov ecx, [esp] |
||
450 | cmp ecx, NR_SCHED_QUEUES |
||
451 | jz .unlock_found |
||
452 | mov eax, [current_slot] |
||
453 | mov eax, [eax+APPDATA.in_schedule.prev] |
||
454 | mov [scheduler_current+ecx*4], eax |
||
3615 | clevermous | 455 | .unlock_found: |
456 | pop ecx |
||
3534 | clevermous | 457 | spin_unlock_irqrestore SchedulerLock |
458 | .found: |
||
459 | mov [CURRENT_TASK], bh |
||
460 | mov [TASK_BASE], edi |
||
461 | rdtsc ;call _rdtsc |
||
462 | mov [edi+TASKDATA.counter_add], eax; for next using update_counters |
||
463 | cmp ebx, [current_slot] |
||
464 | ret |
||
465 | .task_next: |
||
466 | cmp ebx, [scheduler_current+ecx*4] |
||
467 | jnz .task_loop |
||
468 | .priority_next: |
||
469 | inc ecx |
||
3615 | clevermous | 470 | cmp ecx, [esp] |
3534 | clevermous | 471 | jb .priority_loop |
3615 | clevermous | 472 | mov ebx, [current_slot] |
473 | mov edi, [TASK_BASE] |
||
474 | jmp .unlock_found |
||
3534 | clevermous | 475 | endp |
476 | |||
2288 | clevermous | 477 | if 0 |
478 | |||
479 | struc TIMER |
||
480 | { |
||
481 | .next dd ? |
||
482 | .exp_time dd ? |
||
483 | .func dd ? |
||
484 | .arg dd ? |
||
485 | } |
||
486 | |||
487 | |||
488 | uglobal |
||
489 | rdy_head rd 16 |
||
490 | endg |
||
491 | |||
492 | align 4 |
||
493 | pick_task: |
||
494 | |||
495 | xor eax, eax |
||
496 | .pick: |
||
497 | mov ebx, [rdy_head+eax*4] |
||
498 | test ebx, ebx |
||
499 | jz .next |
||
500 | |||
501 | mov [next_task], ebx |
||
502 | test [ebx+flags.billable] |
||
503 | jz @F |
||
504 | mov [bill_task], ebx |
||
505 | @@: |
||
506 | ret |
||
507 | .next: |
||
508 | inc eax |
||
509 | jmp .pick |
||
510 | |||
511 | ; param |
||
512 | ; eax= task |
||
513 | ; |
||
514 | ; retval |
||
515 | ; eax= task |
||
516 | ; ebx= queue |
||
517 | ; ecx= front if 1 or back if 0 |
||
518 | align 4 |
||
519 | shed: |
||
520 | cmp [eax+.tics_left], 0;signed compare |
||
521 | mov ebx, [eax+.priority] |
||
522 | setg ecx |
||
523 | jg @F |
||
524 | |||
525 | mov edx, [eax+.tics_quantum] |
||
526 | mov [eax+.ticks_left], edx |
||
527 | cmp ebx, (IDLE_PRIORITY-1) |
||
528 | je @F |
||
529 | inc ebx |
||
530 | @@: |
||
531 | ret |
||
532 | |||
533 | ; param |
||
534 | ; eax= task |
||
535 | align 4 |
||
536 | enqueue: |
||
537 | call shed;eax |
||
538 | cmp [rdy_head+ebx*4], 0 |
||
539 | jnz @F |
||
540 | |||
541 | mov [rdy_head+ebx*4], eax |
||
542 | mov [rdy_tail+ebx*4], eax |
||
543 | mov [eax+.next_ready], 0 |
||
544 | jmp .pick |
||
545 | @@: |
||
546 | test ecx, ecx |
||
547 | jz .back |
||
548 | |||
549 | mov ecx, [rdy_head+ebx*4] |
||
550 | mov [eax+.next_ready], ecx |
||
551 | mov [rdy_head+ebx*4], eax |
||
552 | jmp .pick |
||
553 | .back: |
||
554 | mov ecx, [rdy_tail+ebx*4] |
||
555 | mov [ecx+.next_ready], eax |
||
556 | mov [rdy_tail+ebx*4], eax |
||
557 | mov [eax+.next_ready], 0 |
||
558 | .pick: |
||
559 | call pick_proc;select next task |
||
560 | ret |
||
561 | |||
562 | end if---><---><<---> |