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