This source file includes following definitions.
- add_wait_queue
- remove_wait_queue
- select_wait
- down
- up
- _get_base
- get_limit
1 #ifndef _LINUX_SCHED_H
2 #define _LINUX_SCHED_H
3
4
5
6
7
8
9
10
11
12 #define HZ 100
13
14
15
16
17 extern int hard_math;
18 extern int x86;
19 extern int ignore_irq13;
20 extern int wp_works_ok;
21 extern int hlt_works_ok;
22
23 extern unsigned long intr_count;
24 extern unsigned long event;
25
26 #define start_bh_atomic() \
27 __asm__ __volatile__("incl _intr_count")
28
29 #define end_bh_atomic() \
30 __asm__ __volatile__("decl _intr_count")
31
32
33
34
35
36 extern int EISA_bus;
37 #define MCA_bus 0
38
39 #include <linux/binfmts.h>
40 #include <linux/personality.h>
41 #include <linux/tasks.h>
42 #include <asm/system.h>
43
44
45
46
47
48 #define TASK_SIZE 0xc0000000
49
50
51
52
53 #define IO_BITMAP_SIZE 32
54
55
56
57
58
59
60
61
62
63
64
65 extern unsigned long avenrun[];
66
67 #define FSHIFT 11
68 #define FIXED_1 (1<<FSHIFT)
69 #define LOAD_FREQ (5*HZ)
70 #define EXP_1 1884
71 #define EXP_5 2014
72 #define EXP_15 2037
73
74 #define CALC_LOAD(load,exp,n) \
75 load *= exp; \
76 load += n*(FIXED_1-exp); \
77 load >>= FSHIFT;
78
79 #define CT_TO_SECS(x) ((x) / HZ)
80 #define CT_TO_USECS(x) (((x) % HZ) * 1000000/HZ)
81
82 #define FIRST_TASK task[0]
83 #define LAST_TASK task[NR_TASKS-1]
84
85 #include <linux/head.h>
86 #include <linux/fs.h>
87 #include <linux/mm.h>
88 #include <linux/signal.h>
89 #include <linux/time.h>
90 #include <linux/param.h>
91 #include <linux/resource.h>
92 #include <linux/vm86.h>
93 #include <linux/math_emu.h>
94 #include <linux/ptrace.h>
95
96 #define TASK_RUNNING 0
97 #define TASK_INTERRUPTIBLE 1
98 #define TASK_UNINTERRUPTIBLE 2
99 #define TASK_ZOMBIE 3
100 #define TASK_STOPPED 4
101 #define TASK_SWAPPING 5
102
103 #ifndef NULL
104 #define NULL ((void *) 0)
105 #endif
106
107 #ifdef __KERNEL__
108
109 extern void sched_init(void);
110 extern void show_state(void);
111 extern void trap_init(void);
112
113 asmlinkage void schedule(void);
114
115 #endif
116
117 struct i387_hard_struct {
118 long cwd;
119 long swd;
120 long twd;
121 long fip;
122 long fcs;
123 long foo;
124 long fos;
125 long st_space[20];
126 };
127
128 struct i387_soft_struct {
129 long cwd;
130 long swd;
131 long twd;
132 long fip;
133 long fcs;
134 long foo;
135 long fos;
136 long top;
137 struct fpu_reg regs[8];
138 unsigned char lookahead;
139 struct info *info;
140 unsigned long entry_eip;
141 };
142
143 union i387_union {
144 struct i387_hard_struct hard;
145 struct i387_soft_struct soft;
146 };
147
148 struct tss_struct {
149 unsigned short back_link,__blh;
150 unsigned long esp0;
151 unsigned short ss0,__ss0h;
152 unsigned long esp1;
153 unsigned short ss1,__ss1h;
154 unsigned long esp2;
155 unsigned short ss2,__ss2h;
156 unsigned long cr3;
157 unsigned long eip;
158 unsigned long eflags;
159 unsigned long eax,ecx,edx,ebx;
160 unsigned long esp;
161 unsigned long ebp;
162 unsigned long esi;
163 unsigned long edi;
164 unsigned short es, __esh;
165 unsigned short cs, __csh;
166 unsigned short ss, __ssh;
167 unsigned short ds, __dsh;
168 unsigned short fs, __fsh;
169 unsigned short gs, __gsh;
170 unsigned short ldt, __ldth;
171 unsigned short trace, bitmap;
172 unsigned long io_bitmap[IO_BITMAP_SIZE+1];
173 unsigned long tr;
174 unsigned long cr2, trap_no, error_code;
175 union i387_union i387;
176 };
177
178 #define INIT_TSS { \
179 0,0, \
180 sizeof(init_kernel_stack) + (long) &init_kernel_stack, \
181 KERNEL_DS, 0, \
182 0,0,0,0,0,0, \
183 (long) &swapper_pg_dir, \
184 0,0,0,0,0,0,0,0,0,0, \
185 USER_DS,0,USER_DS,0,USER_DS,0,USER_DS,0,USER_DS,0,USER_DS,0, \
186 _LDT(0),0, \
187 0, 0x8000, \
188 {~0, }, \
189 _TSS(0), 0, 0,0, \
190 { { 0, }, } \
191 }
192
193 struct files_struct {
194 int count;
195 fd_set close_on_exec;
196 struct file * fd[NR_OPEN];
197 };
198
199 #define INIT_FILES { \
200 0, \
201 { { 0, } }, \
202 { NULL, } \
203 }
204
205 struct fs_struct {
206 int count;
207 unsigned short umask;
208 struct inode * root, * pwd;
209 };
210
211 #define INIT_FS { \
212 0, \
213 0022, \
214 NULL, NULL \
215 }
216
217 struct mm_struct {
218 int count;
219 unsigned long start_code, end_code, end_data;
220 unsigned long start_brk, brk, start_stack, start_mmap;
221 unsigned long arg_start, arg_end, env_start, env_end;
222 unsigned long rss;
223 unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
224 int swappable:1;
225 unsigned long swap_address;
226 unsigned long old_maj_flt;
227 unsigned long dec_flt;
228 unsigned long swap_cnt;
229 struct vm_area_struct * mmap;
230 };
231
232 #define INIT_MM { \
233 0, \
234 0, 0, 0, \
235 0, 0, 0, 0, \
236 0, 0, 0, 0, \
237 0, \
238 0, 0, 0, 0, \
239 0, \
240 0, 0, 0, 0, \
241 NULL }
242
243 struct task_struct {
244
245 volatile long state;
246 long counter;
247 long priority;
248 unsigned long signal;
249 unsigned long blocked;
250 unsigned long flags;
251 int errno;
252 int debugreg[8];
253 struct exec_domain *exec_domain;
254
255 struct linux_binfmt *binfmt;
256 struct task_struct *next_task, *prev_task;
257 struct sigaction sigaction[32];
258 unsigned long saved_kernel_stack;
259 unsigned long kernel_stack_page;
260 int exit_code, exit_signal;
261 unsigned long personality;
262 int dumpable:1;
263 int did_exec:1;
264 int pid,pgrp,session,leader;
265 int groups[NGROUPS];
266
267
268
269
270
271 struct task_struct *p_opptr, *p_pptr, *p_cptr, *p_ysptr, *p_osptr;
272 struct wait_queue *wait_chldexit;
273 unsigned short uid,euid,suid;
274 unsigned short gid,egid,sgid;
275 unsigned long timeout;
276 unsigned long it_real_value, it_prof_value, it_virt_value;
277 unsigned long it_real_incr, it_prof_incr, it_virt_incr;
278 long utime, stime, cutime, cstime, start_time;
279 struct rlimit rlim[RLIM_NLIMITS];
280 unsigned short used_math;
281 char comm[16];
282
283 struct vm86_struct * vm86_info;
284 unsigned long screen_bitmap;
285 unsigned long v86flags, v86mask, v86mode;
286
287 int link_count;
288 struct tty_struct *tty;
289
290 struct shm_desc *shm;
291 struct sem_undo *semun;
292
293 struct desc_struct *ldt;
294
295 struct tss_struct tss;
296
297 struct fs_struct fs[1];
298
299 struct files_struct files[1];
300
301 struct mm_struct mm[1];
302 };
303
304
305
306
307 #define PF_ALIGNWARN 0x00000001
308
309 #define PF_PTRACED 0x00000010
310 #define PF_TRACESYS 0x00000020
311
312
313
314
315 #define CSIGNAL 0x000000ff
316 #define COPYVM 0x00000100
317 #define COPYFD 0x00000200
318
319
320
321
322
323 #define INIT_TASK \
324 { 0,15,15,0,0,0,0, \
325 { 0, }, \
326 &default_exec_domain, \
327 NULL, \
328 &init_task,&init_task, \
329 {{ 0, },}, \
330 0,(unsigned long) &init_kernel_stack, \
331 0,0,0,0,0, \
332 0,0,0,0, \
333 {NOGROUP,}, \
334 &init_task,&init_task,NULL,NULL,NULL,NULL, \
335 0,0,0,0,0,0, \
336 0,0,0,0,0,0,0,0,0,0,0,0, \
337 { {LONG_MAX, LONG_MAX}, {LONG_MAX, LONG_MAX}, \
338 {LONG_MAX, LONG_MAX}, {LONG_MAX, LONG_MAX}, \
339 { 0, LONG_MAX}, {LONG_MAX, LONG_MAX}}, \
340 0, \
341 "swapper", \
342 NULL, 0, 0, 0, 0, \
343 0,NULL, \
344 NULL, NULL, \
345 NULL, \
346 INIT_TSS, \
347 { INIT_FS }, \
348 { INIT_FILES }, \
349 { INIT_MM } \
350 }
351
352 #ifdef __KERNEL__
353
354 extern struct task_struct init_task;
355 extern struct task_struct *task[NR_TASKS];
356 extern struct task_struct *last_task_used_math;
357 extern struct task_struct *current;
358 extern unsigned long volatile jiffies;
359 extern unsigned long itimer_ticks;
360 extern unsigned long itimer_next;
361 extern struct timeval xtime;
362 extern int need_resched;
363
364 #define CURRENT_TIME (xtime.tv_sec)
365
366 extern void sleep_on(struct wait_queue ** p);
367 extern void interruptible_sleep_on(struct wait_queue ** p);
368 extern void wake_up(struct wait_queue ** p);
369 extern void wake_up_interruptible(struct wait_queue ** p);
370
371 extern void notify_parent(struct task_struct * tsk);
372 extern int send_sig(unsigned long sig,struct task_struct * p,int priv);
373 extern int in_group_p(gid_t grp);
374
375 extern int request_irq(unsigned int irq,void (*handler)(int), unsigned long flags, const char *device);
376 extern void free_irq(unsigned int irq);
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391 #define FIRST_TSS_ENTRY 8
392 #define FIRST_LDT_ENTRY (FIRST_TSS_ENTRY+1)
393 #define _TSS(n) ((((unsigned long) n)<<4)+(FIRST_TSS_ENTRY<<3))
394 #define _LDT(n) ((((unsigned long) n)<<4)+(FIRST_LDT_ENTRY<<3))
395 #define load_TR(n) __asm__("ltr %%ax": :"a" (_TSS(n)))
396 #define load_ldt(n) __asm__("lldt %%ax": :"a" (_LDT(n)))
397 #define store_TR(n) \
398 __asm__("str %%ax\n\t" \
399 "subl %2,%%eax\n\t" \
400 "shrl $4,%%eax" \
401 :"=a" (n) \
402 :"0" (0),"i" (FIRST_TSS_ENTRY<<3))
403
404
405
406
407
408
409 #define switch_to(tsk) \
410 __asm__("cli\n\t" \
411 "xchgl %%ecx,_current\n\t" \
412 "ljmp %0\n\t" \
413 "sti\n\t" \
414 "cmpl %%ecx,_last_task_used_math\n\t" \
415 "jne 1f\n\t" \
416 "clts\n" \
417 "1:" \
418 : \
419 :"m" (*(((char *)&tsk->tss.tr)-4)), \
420 "c" (tsk) \
421 :"cx")
422
423 #define _set_base(addr,base) \
424 __asm__("movw %%dx,%0\n\t" \
425 "rorl $16,%%edx\n\t" \
426 "movb %%dl,%1\n\t" \
427 "movb %%dh,%2" \
428 : \
429 :"m" (*((addr)+2)), \
430 "m" (*((addr)+4)), \
431 "m" (*((addr)+7)), \
432 "d" (base) \
433 :"dx")
434
435 #define _set_limit(addr,limit) \
436 __asm__("movw %%dx,%0\n\t" \
437 "rorl $16,%%edx\n\t" \
438 "movb %1,%%dh\n\t" \
439 "andb $0xf0,%%dh\n\t" \
440 "orb %%dh,%%dl\n\t" \
441 "movb %%dl,%1" \
442 : \
443 :"m" (*(addr)), \
444 "m" (*((addr)+6)), \
445 "d" (limit) \
446 :"dx")
447
448 #define set_base(ldt,base) _set_base( ((char *)&(ldt)) , base )
449 #define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , (limit-1)>>12 )
450
451
452
453
454
455
456 extern inline void add_wait_queue(struct wait_queue ** p, struct wait_queue * wait)
457 {
458 unsigned long flags;
459
460 #ifdef DEBUG
461 if (wait->next) {
462 unsigned long pc;
463 __asm__ __volatile__("call 1f\n"
464 "1:\tpopl %0":"=r" (pc));
465 printk("add_wait_queue (%08x): wait->next = %08x\n",pc,(unsigned long) wait->next);
466 }
467 #endif
468 save_flags(flags);
469 cli();
470 if (!*p) {
471 wait->next = wait;
472 *p = wait;
473 } else {
474 wait->next = (*p)->next;
475 (*p)->next = wait;
476 }
477 restore_flags(flags);
478 }
479
480 extern inline void remove_wait_queue(struct wait_queue ** p, struct wait_queue * wait)
481 {
482 unsigned long flags;
483 struct wait_queue * tmp;
484 #ifdef DEBUG
485 unsigned long ok = 0;
486 #endif
487
488 save_flags(flags);
489 cli();
490 if ((*p == wait) &&
491 #ifdef DEBUG
492 (ok = 1) &&
493 #endif
494 ((*p = wait->next) == wait)) {
495 *p = NULL;
496 } else {
497 tmp = wait;
498 while (tmp->next != wait) {
499 tmp = tmp->next;
500 #ifdef DEBUG
501 if (tmp == *p)
502 ok = 1;
503 #endif
504 }
505 tmp->next = wait->next;
506 }
507 wait->next = NULL;
508 restore_flags(flags);
509 #ifdef DEBUG
510 if (!ok) {
511 printk("removed wait_queue not on list.\n");
512 printk("list = %08x, queue = %08x\n",(unsigned long) p, (unsigned long) wait);
513 __asm__("call 1f\n1:\tpopl %0":"=r" (ok));
514 printk("eip = %08x\n",ok);
515 }
516 #endif
517 }
518
519 extern inline void select_wait(struct wait_queue ** wait_address, select_table * p)
520 {
521 struct select_table_entry * entry;
522
523 if (!p || !wait_address)
524 return;
525 if (p->nr >= __MAX_SELECT_TABLE_ENTRIES)
526 return;
527 entry = p->entry + p->nr;
528 entry->wait_address = wait_address;
529 entry->wait.task = current;
530 entry->wait.next = NULL;
531 add_wait_queue(wait_address,&entry->wait);
532 p->nr++;
533 }
534
535 extern void __down(struct semaphore * sem);
536
537
538
539
540 extern inline void down(struct semaphore * sem)
541 {
542 if (sem->count <= 0)
543 __down(sem);
544 sem->count--;
545 }
546
547 extern inline void up(struct semaphore * sem)
548 {
549 sem->count++;
550 wake_up(&sem->wait);
551 }
552
553 static inline unsigned long _get_base(char * addr)
554 {
555 unsigned long __base;
556 __asm__("movb %3,%%dh\n\t"
557 "movb %2,%%dl\n\t"
558 "shll $16,%%edx\n\t"
559 "movw %1,%%dx"
560 :"=&d" (__base)
561 :"m" (*((addr)+2)),
562 "m" (*((addr)+4)),
563 "m" (*((addr)+7)));
564 return __base;
565 }
566
567 #define get_base(ldt) _get_base( ((char *)&(ldt)) )
568
569 static inline unsigned long get_limit(unsigned long segment)
570 {
571 unsigned long __limit;
572 __asm__("lsll %1,%0"
573 :"=r" (__limit):"r" (segment));
574 return __limit+1;
575 }
576
577 #define REMOVE_LINKS(p) do { unsigned long flags; \
578 save_flags(flags) ; cli(); \
579 (p)->next_task->prev_task = (p)->prev_task; \
580 (p)->prev_task->next_task = (p)->next_task; \
581 restore_flags(flags); \
582 if ((p)->p_osptr) \
583 (p)->p_osptr->p_ysptr = (p)->p_ysptr; \
584 if ((p)->p_ysptr) \
585 (p)->p_ysptr->p_osptr = (p)->p_osptr; \
586 else \
587 (p)->p_pptr->p_cptr = (p)->p_osptr; \
588 } while (0)
589
590 #define SET_LINKS(p) do { unsigned long flags; \
591 save_flags(flags); cli(); \
592 (p)->next_task = &init_task; \
593 (p)->prev_task = init_task.prev_task; \
594 init_task.prev_task->next_task = (p); \
595 init_task.prev_task = (p); \
596 restore_flags(flags); \
597 (p)->p_ysptr = NULL; \
598 if (((p)->p_osptr = (p)->p_pptr->p_cptr) != NULL) \
599 (p)->p_osptr->p_ysptr = p; \
600 (p)->p_pptr->p_cptr = p; \
601 } while (0)
602
603 #define for_each_task(p) \
604 for (p = &init_task ; (p = p->next_task) != &init_task ; )
605
606
607
608
609
610 extern struct desc_struct default_ldt;
611
612
613
614 #define loaddebug(register) \
615 __asm__("movl %0,%%edx\n\t" \
616 "movl %%edx,%%db" #register "\n\t" \
617 : \
618 :"m" (current->debugreg[register]) \
619 :"dx");
620
621 #endif
622
623 #endif