This source file includes following definitions.
- get_options
- profile_setup
- ramdisk_setup
- checksetup
- calibrate_delay
- parse_options
- start_kernel
- printf
- init
1
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6
7 #define __KERNEL_SYSCALLS__
8 #include <stdarg.h>
9
10 #include <asm/system.h>
11 #include <asm/io.h>
12
13 #include <linux/types.h>
14 #include <linux/fcntl.h>
15 #include <linux/config.h>
16 #include <linux/sched.h>
17 #include <linux/tty.h>
18 #include <linux/head.h>
19 #include <linux/unistd.h>
20 #include <linux/string.h>
21 #include <linux/timer.h>
22 #include <linux/fs.h>
23 #include <linux/ctype.h>
24 #include <linux/delay.h>
25 #include <linux/utsname.h>
26 #include <linux/ioport.h>
27 #include <linux/hdreg.h>
28 #include <linux/mm.h>
29
30 #include <asm/bugs.h>
31
32 extern char _stext, _etext;
33 extern char *linux_banner;
34
35 static char printbuf[1024];
36
37 extern int console_loglevel;
38
39 extern void init(void);
40 extern void init_IRQ(void);
41 extern void init_modules(void);
42 extern long console_init(long, long);
43 extern long kmalloc_init(long,long);
44 extern long blk_dev_init(long,long);
45 extern long chr_dev_init(long,long);
46 extern void sock_init(void);
47 extern long rd_init(long mem_start, int length);
48 unsigned long net_dev_init(unsigned long, unsigned long);
49 extern long pci_init(long, long);
50
51 extern void bmouse_setup(char *str, int *ints);
52 extern void eth_setup(char *str, int *ints);
53 extern void xd_setup(char *str, int *ints);
54 extern void floppy_setup(char *str, int *ints);
55 extern void st_setup(char *str, int *ints);
56 extern void st0x_setup(char *str, int *ints);
57 extern void tmc8xx_setup(char *str, int *ints);
58 extern void t128_setup(char *str, int *ints);
59 extern void pas16_setup(char *str, int *ints);
60 extern void generic_NCR5380_setup(char *str, int *intr);
61 extern void aha152x_setup(char *str, int *ints);
62 extern void aha1542_setup(char *str, int *ints);
63 extern void aic7xxx_setup(char *str, int *ints);
64 extern void buslogic_setup(char *str, int *ints);
65 extern void fdomain_setup(char *str, int *ints);
66 extern void NCR53c406a_setup(char *str, int *ints);
67 extern void scsi_luns_setup(char *str, int *ints);
68 extern void sound_setup(char *str, int *ints);
69 #ifdef CONFIG_CDU31A
70 extern void cdu31a_setup(char *str, int *ints);
71 #endif CONFIG_CDU31A
72 #ifdef CONFIG_MCD
73 extern void mcd_setup(char *str, int *ints);
74 #endif CONFIG_MCD
75 #ifdef CONFIG_MCDX
76 extern void mcdx_setup(char *str, int *ints);
77 #endif CONFIG_MCDX
78 #ifdef CONFIG_SBPCD
79 extern void sbpcd_setup(char *str, int *ints);
80 #endif CONFIG_SBPCD
81 #ifdef CONFIG_AZTCD
82 extern void aztcd_setup(char *str, int *ints);
83 #endif CONFIG_AZTCD
84 #ifdef CONFIG_CDU535
85 extern void sonycd535_setup(char *str, int *ints);
86 #endif CONFIG_CDU535
87 #ifdef CONFIG_GSCD
88 extern void gscd_setup(char *str, int *ints);
89 #endif CONFIG_GSCD
90 #ifdef CONFIG_CM206
91 extern void cm206_setup(char *str, int *ints);
92 #endif CONFIG_CM206
93 #ifdef CONFIG_OPTCD
94 extern void optcd_setup(char *str, int *ints);
95 #endif CONFIG_OPTCD
96 #ifdef CONFIG_SJCD
97 extern void sjcd_setup(char *str, int *ints);
98 #endif CONFIG_SJCD
99 void ramdisk_setup(char *str, int *ints);
100
101 #ifdef CONFIG_SYSVIPC
102 extern void ipc_init(void);
103 #endif
104 #ifdef CONFIG_SCSI
105 extern unsigned long scsi_dev_init(unsigned long, unsigned long);
106 #endif
107
108
109
110
111 #define MAX_INIT_ARGS 8
112 #define MAX_INIT_ENVS 8
113
114 extern void time_init(void);
115
116 static unsigned long memory_start = 0;
117 static unsigned long memory_end = 0;
118
119 int rows, cols;
120
121 int ramdisk_size;
122 int root_mountflags = 0;
123
124 static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
125 static char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", "TERM=linux", NULL, };
126
127 static char * argv_rc[] = { "/bin/sh", NULL };
128 static char * envp_rc[] = { "HOME=/", "TERM=linux", NULL };
129
130 static char * argv[] = { "-/bin/sh",NULL };
131 static char * envp[] = { "HOME=/usr/root", "TERM=linux", NULL };
132
133 char *get_options(char *str, int *ints)
134 {
135 char *cur = str;
136 int i=1;
137
138 while (cur && isdigit(*cur) && i <= 10) {
139 ints[i++] = simple_strtoul(cur,NULL,0);
140 if ((cur = strchr(cur,',')) != NULL)
141 cur++;
142 }
143 ints[0] = i-1;
144 return(cur);
145 }
146
147 static void profile_setup(char *str, int *ints)
148 {
149 if (ints[0] > 0)
150 prof_shift = (unsigned long) ints[1];
151 else
152 #ifdef CONFIG_PROFILE_SHIFT
153 prof_shift = CONFIG_PROFILE_SHIFT;
154 #else
155 prof_shift = 2;
156 #endif
157 }
158
159 struct {
160 const char *str;
161 void (*setup_func)(char *, int *);
162 } bootsetups[] = {
163 { "reserve=", reserve_setup },
164 { "profile=", profile_setup },
165 { "ramdisk=", ramdisk_setup },
166 #ifdef CONFIG_BUGi386
167 { "no-hlt", no_halt },
168 { "no387", no_387 },
169 #endif
170 #ifdef CONFIG_INET
171 { "ether=", eth_setup },
172 #endif
173 #ifdef CONFIG_SCSI
174 { "max_scsi_luns=", scsi_luns_setup },
175 #endif
176 #if defined(CONFIG_BLK_DEV_HD)
177 { "hd=", hd_setup },
178 #endif
179 #ifdef CONFIG_CHR_DEV_ST
180 { "st=", st_setup },
181 #endif
182 #ifdef CONFIG_BUSMOUSE
183 { "bmouse=", bmouse_setup },
184 #endif
185 #ifdef CONFIG_SCSI_SEAGATE
186 { "st0x=", st0x_setup },
187 { "tmc8xx=", tmc8xx_setup },
188 #endif
189 #ifdef CONFIG_SCSI_T128
190 { "t128=", t128_setup },
191 #endif
192 #ifdef CONFIG_SCSI_PAS16
193 { "pas16=", pas16_setup },
194 #endif
195 #ifdef CONFIG_SCSI_GENERIC_NCR5380
196 { "ncr5380=", generic_NCR5380_setup },
197 #endif
198 #ifdef CONFIG_SCSI_AHA152X
199 { "aha152x=", aha152x_setup},
200 #endif
201 #ifdef CONFIG_SCSI_AHA1542
202 { "aha1542=", aha1542_setup},
203 #endif
204 #ifdef CONFIG_SCSI_AIC7XXX
205 { "aic7xxx=", aic7xxx_setup},
206 #endif
207 #ifdef CONFIG_SCSI_BUSLOGIC
208 { "buslogic=", buslogic_setup},
209 #endif
210 #ifdef CONFIG_SCSI_NCR53C406A
211 { "ncr53c406a=", NCR53c406a_setup},
212 #endif
213 #ifdef CONFIG_SCSI_FUTURE_DOMAIN
214 { "fdomain=", fdomain_setup},
215 #endif
216 #ifdef CONFIG_BLK_DEV_XD
217 { "xd=", xd_setup },
218 #endif
219 #ifdef CONFIG_BLK_DEV_FD
220 { "floppy=", floppy_setup },
221 #endif
222 #ifdef CONFIG_CDU31A
223 { "cdu31a=", cdu31a_setup },
224 #endif CONFIG_CDU31A
225 #ifdef CONFIG_MCD
226 { "mcd=", mcd_setup },
227 #endif CONFIG_MCD
228 #ifdef CONFIG_MCDX
229 { "mcdx=", mcdx_setup },
230 #endif CONFIG_MCDX
231 #ifdef CONFIG_SBPCD
232 { "sbpcd=", sbpcd_setup },
233 #endif CONFIG_SBPCD
234 #ifdef CONFIG_AZTCD
235 { "aztcd=", aztcd_setup },
236 #endif CONFIG_AZTCD
237 #ifdef CONFIG_CDU535
238 { "sonycd535=", sonycd535_setup },
239 #endif CONFIG_CDU535
240 #ifdef CONFIG_GSCD
241 { "gscd=", gscd_setup },
242 #endif CONFIG_GSCD
243 #ifdef CONFIG_CM206
244 { "cm206=", cm206_setup },
245 #endif CONFIG_CM206
246 #ifdef CONFIG_OPTCD
247 { "optcd=", optcd_setup },
248 #endif CONFIG_OPTCD
249 #ifdef CONFIG_SJCD
250 { "sjcd=", sjcd_setup },
251 #endif CONFIG_SJCD
252 #ifdef CONFIG_SOUND
253 { "sound=", sound_setup },
254 #endif
255 { 0, 0 }
256 };
257
258 void ramdisk_setup(char *str, int *ints)
259 {
260 if (ints[0] > 0 && ints[1] >= 0)
261 ramdisk_size = ints[1];
262 }
263
264 static int checksetup(char *line)
265 {
266 int i = 0;
267 int ints[11];
268
269 #ifdef CONFIG_BLK_DEV_IDE
270
271 if (!strncmp(line,"ide",3) || (!strncmp(line,"hd",2) && line[2] != '=')) {
272 ide_setup(line);
273 return 1;
274 }
275 #endif
276 while (bootsetups[i].str) {
277 int n = strlen(bootsetups[i].str);
278 if (!strncmp(line,bootsetups[i].str,n)) {
279 bootsetups[i].setup_func(get_options(line+n,ints), ints);
280 return 1;
281 }
282 i++;
283 }
284 return 0;
285 }
286
287
288
289 unsigned long loops_per_sec = (1<<12);
290
291
292
293
294 #define LPS_PREC 8
295
296 static void calibrate_delay(void)
297 {
298 int ticks;
299 int loopbit;
300 int lps_precision = LPS_PREC;
301
302 printk("Calibrating delay loop.. ");
303 while (loops_per_sec <<= 1) {
304
305 ticks = jiffies;
306 while (ticks == jiffies)
307 ;
308
309 ticks = jiffies;
310 __delay(loops_per_sec);
311 ticks = jiffies - ticks;
312 if (ticks)
313 break;
314 }
315
316
317
318 loops_per_sec >>= 1;
319 loopbit = loops_per_sec;
320 while ( lps_precision-- && (loopbit >>= 1) ) {
321 loops_per_sec |= loopbit;
322 ticks = jiffies;
323 while (ticks == jiffies);
324 ticks = jiffies;
325 __delay(loops_per_sec);
326 if (jiffies != ticks)
327 loops_per_sec &= ~loopbit;
328 }
329
330
331 loops_per_sec *= HZ;
332
333 printk("ok - %lu.%02lu BogoMIPS\n",
334 (loops_per_sec+2500)/500000,
335 ((loops_per_sec+2500)/5000) % 100);
336 }
337
338
339
340
341
342
343
344
345
346
347
348 static void parse_options(char *line)
349 {
350 char *next;
351 static const char *devnames[] = { "hda", "hdb", "hdc", "hdd", "sda", "sdb", "sdc", "sdd", "sde", "fd", "xda", "xdb", NULL };
352 static int devnums[] = { 0x300, 0x340, 0x1600, 0x1640, 0x800, 0x810, 0x820, 0x830, 0x840, 0x200, 0xD00, 0xD40, 0};
353 int args, envs;
354
355 if (!*line)
356 return;
357 args = 0;
358 envs = 1;
359 next = line;
360 while ((line = next) != NULL) {
361 if ((next = strchr(line,' ')) != NULL)
362 *next++ = 0;
363
364
365
366 if (!strncmp(line,"root=",5)) {
367 int n;
368 line += 5;
369 if (strncmp(line,"/dev/",5)) {
370 ROOT_DEV = to_kdev_t(
371 simple_strtoul(line,NULL,16));
372 continue;
373 }
374 line += 5;
375 for (n = 0 ; devnames[n] ; n++) {
376 int len = strlen(devnames[n]);
377 if (!strncmp(line,devnames[n],len)) {
378 ROOT_DEV = to_kdev_t(devnums[n]+
379 simple_strtoul(line+len,NULL,0));
380 break;
381 }
382 }
383 continue;
384 }
385 if (!strcmp(line,"ro")) {
386 root_mountflags |= MS_RDONLY;
387 continue;
388 }
389 if (!strcmp(line,"rw")) {
390 root_mountflags &= ~MS_RDONLY;
391 continue;
392 }
393 if (!strcmp(line,"debug")) {
394 console_loglevel = 10;
395 continue;
396 }
397 if (checksetup(line))
398 continue;
399
400
401
402
403 if (strchr(line,'=')) {
404 if (envs >= MAX_INIT_ENVS)
405 break;
406 envp_init[++envs] = line;
407 } else {
408 if (args >= MAX_INIT_ARGS)
409 break;
410 argv_init[++args] = line;
411 }
412 }
413 argv_init[args+1] = NULL;
414 envp_init[envs+1] = NULL;
415 }
416
417 extern void setup_arch(char **, unsigned long *, unsigned long *);
418
419 static char init_stack[PAGE_SIZE];
420
421 asmlinkage void start_kernel(void)
422 {
423 char * command_line;
424
425
426
427
428 setup_arch(&command_line, &memory_start, &memory_end);
429 memory_start = paging_init(memory_start,memory_end);
430 trap_init();
431 init_IRQ();
432 sched_init();
433 time_init();
434 parse_options(command_line);
435 init_modules();
436 #ifdef CONFIG_PROFILE
437 if (!prof_shift)
438 #ifdef CONFIG_PROFILE_SHIFT
439 prof_shift = CONFIG_PROFILE_SHIFT;
440 #else
441 prof_shift = 2;
442 #endif
443 #endif
444 if (prof_shift) {
445 prof_buffer = (unsigned long *) memory_start;
446
447 prof_len = (unsigned long) &_etext - (unsigned long) &_stext;
448 prof_len >>= prof_shift;
449 memory_start += prof_len * sizeof(unsigned long);
450 }
451 memory_start = console_init(memory_start,memory_end);
452 #ifdef CONFIG_PCI
453 memory_start = pci_init(memory_start,memory_end);
454 #endif
455 memory_start = kmalloc_init(memory_start,memory_end);
456 sti();
457 calibrate_delay();
458 memory_start = chr_dev_init(memory_start,memory_end);
459 memory_start = blk_dev_init(memory_start,memory_end);
460 sti();
461 #ifdef CONFIG_SCSI
462 memory_start = scsi_dev_init(memory_start,memory_end);
463 #endif
464 #ifdef CONFIG_INET
465 memory_start = net_dev_init(memory_start,memory_end);
466 #endif
467 memory_start = inode_init(memory_start,memory_end);
468 memory_start = file_table_init(memory_start,memory_end);
469 memory_start = name_cache_init(memory_start,memory_end);
470 mem_init(memory_start,memory_end);
471 buffer_init();
472 sock_init();
473 #ifdef CONFIG_SYSVIPC
474 ipc_init();
475 #endif
476 sti();
477 check_bugs();
478
479 printk(linux_banner);
480
481
482 if (!clone(CLONE_VM, init_stack+sizeof(init_stack)))
483 init();
484
485
486
487
488
489
490
491
492
493 for(;;)
494 idle();
495 }
496
497 static int printf(const char *fmt, ...)
498 {
499 va_list args;
500 int i;
501
502 va_start(args, fmt);
503 write(1,printbuf,i=vsprintf(printbuf, fmt, args));
504 va_end(args);
505 return i;
506 }
507
508 void init(void)
509 {
510 int pid,i;
511
512 setup();
513
514 #ifdef CONFIG_UMSDOS_FS
515 {
516
517
518
519
520
521 extern struct inode *pseudo_root;
522 if (pseudo_root != NULL){
523 current->fs->root = pseudo_root;
524 current->fs->pwd = pseudo_root;
525 }
526 }
527 #endif
528
529 (void) open("/dev/tty1",O_RDWR,0);
530 (void) dup(0);
531 (void) dup(0);
532
533 execve("/etc/init",argv_init,envp_init);
534 execve("/bin/init",argv_init,envp_init);
535 execve("/sbin/init",argv_init,envp_init);
536
537
538 if (!(pid=fork())) {
539 close(0);
540 if (open("/etc/rc",O_RDONLY,0))
541 _exit(1);
542 execve("/bin/sh",argv_rc,envp_rc);
543 _exit(2);
544 }
545 if (pid>0)
546 while (pid != wait(&i))
547 ;
548 while (1) {
549 if ((pid = fork()) < 0) {
550 printf("Fork failed in init\n\r");
551 continue;
552 }
553 if (!pid) {
554 close(0);close(1);close(2);
555 setsid();
556 (void) open("/dev/tty1",O_RDWR,0);
557 (void) dup(0);
558 (void) dup(0);
559 _exit(execve("/bin/sh",argv,envp));
560 }
561 while (1)
562 if (pid == wait(&i))
563 break;
564 printf("\n\rchild %d died with code %04x\n\r",pid,i);
565 sync();
566 }
567 _exit(0);
568 }