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 #define NEW_SWAP
5
6
7
8
9
10
11
12
13
14 #define HZ 100
15
16
17
18
19 extern int hard_math;
20 extern int x86;
21 extern int ignore_irq13;
22 extern int wp_works_ok;
23
24 extern unsigned long intr_count;
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 #ifdef NEW_SWAP
226 unsigned long old_maj_flt;
227 unsigned long dec_flt;
228 unsigned long swap_cnt;
229 short swap_table;
230 short swap_page;
231 #endif NEW_SWAP
232 struct vm_area_struct * mmap;
233 };
234
235 #define INIT_MM { \
236 0, \
237 0, 0, 0, \
238 0, 0, 0, 0, \
239 0, 0, 0, 0, \
240 0, \
241 0, 0, 0, 0, \
242 0, \
243 0, 0, 0, 0, 0, \
244 NULL }
245
246 struct task_struct {
247
248 volatile long state;
249 long counter;
250 long priority;
251 unsigned long signal;
252 unsigned long blocked;
253 unsigned long flags;
254 int errno;
255 int debugreg[8];
256 struct exec_domain *exec_domain;
257
258 struct linux_binfmt *binfmt;
259 struct task_struct *next_task, *prev_task;
260 struct sigaction sigaction[32];
261 unsigned long saved_kernel_stack;
262 unsigned long kernel_stack_page;
263 int exit_code, exit_signal;
264 unsigned long personality;
265 int dumpable:1;
266 int did_exec:1;
267 int pid,pgrp,session,leader;
268 int groups[NGROUPS];
269
270
271
272
273
274 struct task_struct *p_opptr, *p_pptr, *p_cptr, *p_ysptr, *p_osptr;
275 struct wait_queue *wait_chldexit;
276 unsigned short uid,euid,suid;
277 unsigned short gid,egid,sgid;
278 unsigned long timeout;
279 unsigned long it_real_value, it_prof_value, it_virt_value;
280 unsigned long it_real_incr, it_prof_incr, it_virt_incr;
281 long utime, stime, cutime, cstime, start_time;
282 struct rlimit rlim[RLIM_NLIMITS];
283 unsigned short used_math;
284 char comm[16];
285
286 struct vm86_struct * vm86_info;
287 unsigned long screen_bitmap;
288 unsigned long v86flags, v86mask, v86mode;
289
290 int link_count;
291 struct tty_struct *tty;
292 struct inode * executable;
293 struct shm_desc *shm;
294 struct sem_undo *semun;
295
296 struct desc_struct *ldt;
297
298 struct tss_struct tss;
299
300 struct fs_struct fs[1];
301
302 struct files_struct files[1];
303
304 struct mm_struct mm[1];
305 };
306
307
308
309
310 #define PF_ALIGNWARN 0x00000001
311
312 #define PF_PTRACED 0x00000010
313 #define PF_TRACESYS 0x00000020
314
315
316
317
318 #define CSIGNAL 0x000000ff
319 #define COPYVM 0x00000100
320 #define COPYFD 0x00000200
321
322
323
324
325
326 #define INIT_TASK \
327 { 0,15,15,0,0,0,0, \
328 { 0, }, \
329 &default_exec_domain, \
330 NULL, \
331 &init_task,&init_task, \
332 {{ 0, },}, \
333 0,(unsigned long) &init_kernel_stack, \
334 0,0,0,0,0, \
335 0,0,0,0, \
336 {NOGROUP,}, \
337 &init_task,&init_task,NULL,NULL,NULL,NULL, \
338 0,0,0,0,0,0, \
339 0,0,0,0,0,0,0,0,0,0,0,0, \
340 { {LONG_MAX, LONG_MAX}, {LONG_MAX, LONG_MAX}, \
341 {LONG_MAX, LONG_MAX}, {LONG_MAX, LONG_MAX}, \
342 { 0, LONG_MAX}, {LONG_MAX, LONG_MAX}}, \
343 0, \
344 "swapper", \
345 NULL, 0, 0, 0, 0, \
346 0,NULL,NULL, \
347 NULL, NULL, \
348 NULL, \
349 INIT_TSS, \
350 { INIT_FS }, \
351 { INIT_FILES }, \
352 { INIT_MM } \
353 }
354
355 #ifdef __KERNEL__
356
357 extern struct task_struct init_task;
358 extern struct task_struct *task[NR_TASKS];
359 extern struct task_struct *last_task_used_math;
360 extern struct task_struct *current;
361 extern unsigned long volatile jiffies;
362 extern unsigned long itimer_ticks;
363 extern unsigned long itimer_next;
364 extern struct timeval xtime;
365 extern int need_resched;
366
367 #define CURRENT_TIME (xtime.tv_sec)
368
369 extern void sleep_on(struct wait_queue ** p);
370 extern void interruptible_sleep_on(struct wait_queue ** p);
371 extern void wake_up(struct wait_queue ** p);
372 extern void wake_up_interruptible(struct wait_queue ** p);
373
374 extern void notify_parent(struct task_struct * tsk);
375 extern int send_sig(unsigned long sig,struct task_struct * p,int priv);
376 extern int in_group_p(gid_t grp);
377
378 extern int request_irq(unsigned int irq,void (*handler)(int));
379 extern void free_irq(unsigned int irq);
380 extern int irqaction(unsigned int irq,struct sigaction * sa);
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395 #define FIRST_TSS_ENTRY 8
396 #define FIRST_LDT_ENTRY (FIRST_TSS_ENTRY+1)
397 #define _TSS(n) ((((unsigned long) n)<<4)+(FIRST_TSS_ENTRY<<3))
398 #define _LDT(n) ((((unsigned long) n)<<4)+(FIRST_LDT_ENTRY<<3))
399 #define load_TR(n) __asm__("ltr %%ax": :"a" (_TSS(n)))
400 #define load_ldt(n) __asm__("lldt %%ax": :"a" (_LDT(n)))
401 #define store_TR(n) \
402 __asm__("str %%ax\n\t" \
403 "subl %2,%%eax\n\t" \
404 "shrl $4,%%eax" \
405 :"=a" (n) \
406 :"0" (0),"i" (FIRST_TSS_ENTRY<<3))
407
408
409
410
411
412
413 #define switch_to(tsk) \
414 __asm__("cli\n\t" \
415 "xchgl %%ecx,_current\n\t" \
416 "ljmp %0\n\t" \
417 "sti\n\t" \
418 "cmpl %%ecx,_last_task_used_math\n\t" \
419 "jne 1f\n\t" \
420 "clts\n" \
421 "1:" \
422 : \
423 :"m" (*(((char *)&tsk->tss.tr)-4)), \
424 "c" (tsk) \
425 :"cx")
426
427 #define _set_base(addr,base) \
428 __asm__("movw %%dx,%0\n\t" \
429 "rorl $16,%%edx\n\t" \
430 "movb %%dl,%1\n\t" \
431 "movb %%dh,%2" \
432 : \
433 :"m" (*((addr)+2)), \
434 "m" (*((addr)+4)), \
435 "m" (*((addr)+7)), \
436 "d" (base) \
437 :"dx")
438
439 #define _set_limit(addr,limit) \
440 __asm__("movw %%dx,%0\n\t" \
441 "rorl $16,%%edx\n\t" \
442 "movb %1,%%dh\n\t" \
443 "andb $0xf0,%%dh\n\t" \
444 "orb %%dh,%%dl\n\t" \
445 "movb %%dl,%1" \
446 : \
447 :"m" (*(addr)), \
448 "m" (*((addr)+6)), \
449 "d" (limit) \
450 :"dx")
451
452 #define set_base(ldt,base) _set_base( ((char *)&(ldt)) , base )
453 #define set_limit(ldt,limit) _set_limit( ((char *)&(ldt)) , (limit-1)>>12 )
454
455
456
457
458
459
460 extern inline void add_wait_queue(struct wait_queue ** p, struct wait_queue * wait)
461 {
462 unsigned long flags;
463
464 #ifdef DEBUG
465 if (wait->next) {
466 unsigned long pc;
467 __asm__ __volatile__("call 1f\n"
468 "1:\tpopl %0":"=r" (pc));
469 printk("add_wait_queue (%08x): wait->next = %08x\n",pc,(unsigned long) wait->next);
470 }
471 #endif
472 save_flags(flags);
473 cli();
474 if (!*p) {
475 wait->next = wait;
476 *p = wait;
477 } else {
478 wait->next = (*p)->next;
479 (*p)->next = wait;
480 }
481 restore_flags(flags);
482 }
483
484 extern inline void remove_wait_queue(struct wait_queue ** p, struct wait_queue * wait)
485 {
486 unsigned long flags;
487 struct wait_queue * tmp;
488 #ifdef DEBUG
489 unsigned long ok = 0;
490 #endif
491
492 save_flags(flags);
493 cli();
494 if ((*p == wait) &&
495 #ifdef DEBUG
496 (ok = 1) &&
497 #endif
498 ((*p = wait->next) == wait)) {
499 *p = NULL;
500 } else {
501 tmp = wait;
502 while (tmp->next != wait) {
503 tmp = tmp->next;
504 #ifdef DEBUG
505 if (tmp == *p)
506 ok = 1;
507 #endif
508 }
509 tmp->next = wait->next;
510 }
511 wait->next = NULL;
512 restore_flags(flags);
513 #ifdef DEBUG
514 if (!ok) {
515 printk("removed wait_queue not on list.\n");
516 printk("list = %08x, queue = %08x\n",(unsigned long) p, (unsigned long) wait);
517 __asm__("call 1f\n1:\tpopl %0":"=r" (ok));
518 printk("eip = %08x\n",ok);
519 }
520 #endif
521 }
522
523 extern inline void select_wait(struct wait_queue ** wait_address, select_table * p)
524 {
525 struct select_table_entry * entry;
526
527 if (!p || !wait_address)
528 return;
529 if (p->nr >= __MAX_SELECT_TABLE_ENTRIES)
530 return;
531 entry = p->entry + p->nr;
532 entry->wait_address = wait_address;
533 entry->wait.task = current;
534 entry->wait.next = NULL;
535 add_wait_queue(wait_address,&entry->wait);
536 p->nr++;
537 }
538
539 extern void __down(struct semaphore * sem);
540
541
542
543
544 extern inline void down(struct semaphore * sem)
545 {
546 if (sem->count <= 0)
547 __down(sem);
548 sem->count--;
549 }
550
551 extern inline void up(struct semaphore * sem)
552 {
553 sem->count++;
554 wake_up(&sem->wait);
555 }
556
557 static inline unsigned long _get_base(char * addr)
558 {
559 unsigned long __base;
560 __asm__("movb %3,%%dh\n\t"
561 "movb %2,%%dl\n\t"
562 "shll $16,%%edx\n\t"
563 "movw %1,%%dx"
564 :"=&d" (__base)
565 :"m" (*((addr)+2)),
566 "m" (*((addr)+4)),
567 "m" (*((addr)+7)));
568 return __base;
569 }
570
571 #define get_base(ldt) _get_base( ((char *)&(ldt)) )
572
573 static inline unsigned long get_limit(unsigned long segment)
574 {
575 unsigned long __limit;
576 __asm__("lsll %1,%0"
577 :"=r" (__limit):"r" (segment));
578 return __limit+1;
579 }
580
581 #define REMOVE_LINKS(p) do { unsigned long flags; \
582 save_flags(flags) ; cli(); \
583 (p)->next_task->prev_task = (p)->prev_task; \
584 (p)->prev_task->next_task = (p)->next_task; \
585 restore_flags(flags); \
586 if ((p)->p_osptr) \
587 (p)->p_osptr->p_ysptr = (p)->p_ysptr; \
588 if ((p)->p_ysptr) \
589 (p)->p_ysptr->p_osptr = (p)->p_osptr; \
590 else \
591 (p)->p_pptr->p_cptr = (p)->p_osptr; \
592 } while (0)
593
594 #define SET_LINKS(p) do { unsigned long flags; \
595 save_flags(flags); cli(); \
596 (p)->next_task = &init_task; \
597 (p)->prev_task = init_task.prev_task; \
598 init_task.prev_task->next_task = (p); \
599 init_task.prev_task = (p); \
600 restore_flags(flags); \
601 (p)->p_ysptr = NULL; \
602 if (((p)->p_osptr = (p)->p_pptr->p_cptr) != NULL) \
603 (p)->p_osptr->p_ysptr = p; \
604 (p)->p_pptr->p_cptr = p; \
605 } while (0)
606
607 #define for_each_task(p) \
608 for (p = &init_task ; (p = p->next_task) != &init_task ; )
609
610
611
612
613
614 extern struct desc_struct default_ldt;
615
616
617
618 #define loaddebug(register) \
619 __asm__("movl %0,%%edx\n\t" \
620 "movl %%edx,%%db" #register "\n\t" \
621 : \
622 :"m" (current->debugreg[register]) \
623 :"dx");
624
625 #endif
626
627 #endif