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