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