This source file includes following definitions.
- _syscall0
- get_options
- ramdisk_setup
- checksetup
- calibrate_delay
- parse_options
- start_kernel
- printf
- init
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7 #include <stdarg.h>
8
9 #include <asm/system.h>
10 #include <asm/io.h>
11
12 #include <linux/types.h>
13 #include <linux/fcntl.h>
14 #include <linux/config.h>
15 #include <linux/sched.h>
16 #include <linux/tty.h>
17 #include <linux/head.h>
18 #include <linux/unistd.h>
19 #include <linux/string.h>
20 #include <linux/timer.h>
21 #include <linux/fs.h>
22 #include <linux/ctype.h>
23 #include <linux/delay.h>
24 #include <linux/utsname.h>
25 #include <linux/ioport.h>
26 #include <linux/hdreg.h>
27
28 #include <asm/bugs.h>
29
30 extern unsigned long * prof_buffer;
31 extern unsigned long prof_len;
32 extern char etext, end;
33 extern char *linux_banner;
34
35
36
37
38
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41
42
43
44
45
46
47 #define __NR__exit __NR_exit
48 static inline _syscall0(int,idle)
49 static inline _syscall0(int,fork)
50 static inline _syscall0(int,pause)
51 static inline _syscall0(int,setup)
52 static inline _syscall0(int,sync)
53 static inline _syscall0(pid_t,setsid)
54 static inline _syscall3(int,write,int,fd,const char *,buf,off_t,count)
55 static inline _syscall1(int,dup,int,fd)
56 static inline _syscall3(int,execve,const char *,file,char **,argv,char **,envp)
57 static inline _syscall3(int,open,const char *,file,int,flag,int,mode)
58 static inline _syscall1(int,close,int,fd)
59 static inline _syscall1(int,_exit,int,exitcode)
60 static inline _syscall3(pid_t,waitpid,pid_t,pid,int *,wait_stat,int,options)
61
62 static inline pid_t wait(int * wait_stat)
63 {
64 return waitpid(-1,wait_stat,0);
65 }
66
67 static char printbuf[1024];
68
69 extern int console_loglevel;
70
71 extern void init(void);
72 extern void init_IRQ(void);
73 extern void init_modules(void);
74 extern long console_init(long, long);
75 extern long kmalloc_init(long,long);
76 extern long blk_dev_init(long,long);
77 extern long chr_dev_init(long,long);
78 extern void sock_init(void);
79 extern long rd_init(long mem_start, int length);
80 unsigned long net_dev_init(unsigned long, unsigned long);
81 extern long bios32_init(long, long);
82
83 extern void bmouse_setup(char *str, int *ints);
84 extern void eth_setup(char *str, int *ints);
85 extern void xd_setup(char *str, int *ints);
86 extern void floppy_setup(char *str, int *ints);
87 extern void mcd_setup(char *str, int *ints);
88 extern void st_setup(char *str, int *ints);
89 extern void st0x_setup(char *str, int *ints);
90 extern void tmc8xx_setup(char *str, int *ints);
91 extern void t128_setup(char *str, int *ints);
92 extern void pas16_setup(char *str, int *ints);
93 extern void generic_NCR5380_setup(char *str, int *intr);
94 extern void aha152x_setup(char *str, int *ints);
95 extern void aha1542_setup(char *str, int *ints);
96 extern void aha274x_setup(char *str, int *ints);
97 extern void buslogic_setup(char *str, int *ints);
98 extern void scsi_luns_setup(char *str, int *ints);
99 extern void sound_setup(char *str, int *ints);
100 #ifdef CONFIG_SBPCD
101 extern void sbpcd_setup(char *str, int *ints);
102 #endif CONFIG_SBPCD
103 #ifdef CONFIG_CDU31A
104 extern void cdu31a_setup(char *str, int *ints);
105 #endif CONFIG_CDU31A
106 void ramdisk_setup(char *str, int *ints);
107
108 #ifdef CONFIG_SYSVIPC
109 extern void ipc_init(void);
110 #endif
111 #ifdef CONFIG_SCSI
112 extern unsigned long scsi_dev_init(unsigned long, unsigned long);
113 #endif
114
115
116
117
118 #define MAX_INIT_ARGS 8
119 #define MAX_INIT_ENVS 8
120
121 extern void time_init(void);
122
123 static unsigned long memory_start = 0;
124 static unsigned long memory_end = 0;
125
126 static char term[21];
127 int rows, cols;
128
129 int ramdisk_size;
130 int root_mountflags = 0;
131
132 static char * argv_init[MAX_INIT_ARGS+2] = { "init", NULL, };
133 static char * envp_init[MAX_INIT_ENVS+2] = { "HOME=/", term, NULL, };
134
135 static char * argv_rc[] = { "/bin/sh", NULL };
136 static char * envp_rc[] = { "HOME=/", term, NULL };
137
138 static char * argv[] = { "-/bin/sh",NULL };
139 static char * envp[] = { "HOME=/usr/root", term, NULL };
140
141 char *get_options(char *str, int *ints)
142 {
143 char *cur = str;
144 int i=1;
145
146 while (cur && isdigit(*cur) && i <= 10) {
147 ints[i++] = simple_strtoul(cur,NULL,0);
148 if ((cur = strchr(cur,',')) != NULL)
149 cur++;
150 }
151 ints[0] = i-1;
152 return(cur);
153 }
154
155 struct {
156 char *str;
157 void (*setup_func)(char *, int *);
158 } bootsetups[] = {
159 { "reserve=", reserve_setup },
160 { "ramdisk=", ramdisk_setup },
161 #ifdef CONFIG_BUGi386
162 { "no-hlt", no_halt },
163 { "no387", no_387 },
164 #endif
165 #ifdef CONFIG_INET
166 { "ether=", eth_setup },
167 #endif
168 #ifdef CONFIG_SCSI
169 { "max_scsi_luns=", scsi_luns_setup },
170 #endif
171 #ifdef CONFIG_BLK_DEV_IDE
172 { "hda=", hda_setup },
173 { "hdb=", hdb_setup },
174 { "hdc=", hdc_setup },
175 { "hdd=", hdd_setup },
176 { "hd=", ide_setup },
177 #elif defined(CONFIG_BLK_DEV_HD)
178 { "hd=", hd_setup },
179 #endif
180 #ifdef CONFIG_CHR_DEV_ST
181 { "st=", st_setup },
182 #endif
183 #ifdef CONFIG_BUSMOUSE
184 { "bmouse=", bmouse_setup },
185 #endif
186 #ifdef CONFIG_SCSI_SEAGATE
187 { "st0x=", st0x_setup },
188 { "tmc8xx=", tmc8xx_setup },
189 #endif
190 #ifdef CONFIG_SCSI_T128
191 { "t128=", t128_setup },
192 #endif
193 #ifdef CONFIG_SCSI_PAS16
194 { "pas16=", pas16_setup },
195 #endif
196 #ifdef CONFIG_SCSI_GENERIC_NCR5380
197 { "ncr5380=", generic_NCR5380_setup },
198 #endif
199 #ifdef CONFIG_SCSI_AHA152X
200 { "aha152x=", aha152x_setup},
201 #endif
202 #ifdef CONFIG_SCSI_AHA1542
203 { "aha1542=", aha1542_setup},
204 #endif
205 #ifdef CONFIG_SCSI_AHA274X
206 { "aha274x=", aha274x_setup},
207 #endif
208 #ifdef CONFIG_SCSI_BUSLOGIC
209 { "buslogic=", buslogic_setup},
210 #endif
211 #ifdef CONFIG_BLK_DEV_XD
212 { "xd=", xd_setup },
213 #endif
214 #ifdef CONFIG_BLK_DEV_FD
215 { "floppy=", floppy_setup },
216 #endif
217 #ifdef CONFIG_MCD
218 { "mcd=", mcd_setup },
219 #endif
220 #ifdef CONFIG_SOUND
221 { "sound=", sound_setup },
222 #endif
223 #ifdef CONFIG_SBPCD
224 { "sbpcd=", sbpcd_setup },
225 #endif CONFIG_SBPCD
226 #ifdef CONFIG_CDU31A
227 { "cdu31a=", cdu31a_setup },
228 #endif CONFIG_CDU31A
229 { 0, 0 }
230 };
231
232 void ramdisk_setup(char *str, int *ints)
233 {
234 if (ints[0] > 0 && ints[1] >= 0)
235 ramdisk_size = ints[1];
236 }
237
238 static int checksetup(char *line)
239 {
240 int i = 0;
241 int ints[11];
242
243 while (bootsetups[i].str) {
244 int n = strlen(bootsetups[i].str);
245 if (!strncmp(line,bootsetups[i].str,n)) {
246 bootsetups[i].setup_func(get_options(line+n,ints), ints);
247 return 1;
248 }
249 i++;
250 }
251 return 0;
252 }
253
254 unsigned long loops_per_sec = 1;
255
256 static void calibrate_delay(void)
257 {
258 int ticks;
259
260 printk("Calibrating delay loop.. ");
261 while (loops_per_sec <<= 1) {
262
263 ticks = jiffies;
264 while (ticks == jiffies)
265 ;
266
267 ticks = jiffies;
268 __delay(loops_per_sec);
269 ticks = jiffies - ticks;
270 if (ticks >= HZ) {
271 loops_per_sec = muldiv(loops_per_sec, HZ, ticks);
272 printk("ok - %lu.%02lu BogoMips\n",
273 loops_per_sec/500000,
274 (loops_per_sec/5000) % 100);
275 return;
276 }
277 }
278 printk("failed\n");
279 }
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290
291
292 static void parse_options(char *line)
293 {
294 char *next;
295 char *devnames[] = { "hda", "hdb", "hdc", "hdd", "sda", "sdb", "sdc", "sdd", "sde", "fd", "xda", "xdb", NULL };
296 int devnums[] = { 0x300, 0x340, 0x1600, 0x1640, 0x800, 0x810, 0x820, 0x830, 0x840, 0x200, 0xD00, 0xD40, 0};
297 int args, envs;
298
299 if (!*line)
300 return;
301 args = 0;
302 envs = 1;
303 next = line;
304 while ((line = next) != NULL) {
305 if ((next = strchr(line,' ')) != NULL)
306 *next++ = 0;
307
308
309
310 if (!strncmp(line,"root=",5)) {
311 int n;
312 line += 5;
313 if (strncmp(line,"/dev/",5)) {
314 ROOT_DEV = simple_strtoul(line,NULL,16);
315 continue;
316 }
317 line += 5;
318 for (n = 0 ; devnames[n] ; n++) {
319 int len = strlen(devnames[n]);
320 if (!strncmp(line,devnames[n],len)) {
321 ROOT_DEV = devnums[n]+simple_strtoul(line+len,NULL,0);
322 break;
323 }
324 }
325 continue;
326 }
327 if (!strcmp(line,"ro")) {
328 root_mountflags |= MS_RDONLY;
329 continue;
330 }
331 if (!strcmp(line,"rw")) {
332 root_mountflags &= ~MS_RDONLY;
333 continue;
334 }
335 if (!strcmp(line,"debug")) {
336 console_loglevel = 10;
337 continue;
338 }
339 if (checksetup(line))
340 continue;
341
342
343
344
345 if (strchr(line,'=')) {
346 if (envs >= MAX_INIT_ENVS)
347 break;
348 envp_init[++envs] = line;
349 } else {
350 if (args >= MAX_INIT_ARGS)
351 break;
352 argv_init[++args] = line;
353 }
354 }
355 argv_init[args+1] = NULL;
356 envp_init[envs+1] = NULL;
357 }
358
359 extern void check_bugs(void);
360 extern void setup_arch(char **, unsigned long *, unsigned long *);
361
362 asmlinkage void start_kernel(void)
363 {
364 char * command_line;
365
366
367
368
369 setup_arch(&command_line, &memory_start, &memory_end);
370 memory_start = paging_init(memory_start,memory_end);
371 trap_init();
372 init_IRQ();
373 sched_init();
374 parse_options(command_line);
375 init_modules();
376 #ifdef CONFIG_PROFILE
377 prof_buffer = (unsigned long *) memory_start;
378
379 prof_len = (unsigned long) &etext;
380 prof_len >>= CONFIG_PROFILE_SHIFT;
381 memory_start += prof_len * sizeof(unsigned long);
382 #endif
383 memory_start = console_init(memory_start,memory_end);
384 memory_start = bios32_init(memory_start,memory_end);
385 memory_start = kmalloc_init(memory_start,memory_end);
386 sti();
387 calibrate_delay();
388 cli();
389 memory_start = chr_dev_init(memory_start,memory_end);
390 memory_start = blk_dev_init(memory_start,memory_end);
391 sti();
392 #ifdef CONFIG_SCSI
393 memory_start = scsi_dev_init(memory_start,memory_end);
394 #endif
395 #ifdef CONFIG_INET
396 memory_start = net_dev_init(memory_start,memory_end);
397 #endif
398 memory_start = inode_init(memory_start,memory_end);
399 memory_start = file_table_init(memory_start,memory_end);
400 memory_start = name_cache_init(memory_start,memory_end);
401 mem_init(memory_start,memory_end);
402 buffer_init();
403 time_init();
404 sock_init();
405 #ifdef CONFIG_SYSVIPC
406 ipc_init();
407 #endif
408 sti();
409 check_bugs();
410
411 printk(linux_banner);
412
413 move_to_user_mode();
414 if (!fork())
415 init();
416
417
418
419
420
421
422
423
424
425 for(;;)
426 idle();
427 }
428
429 static int printf(const char *fmt, ...)
430 {
431 va_list args;
432 int i;
433
434 va_start(args, fmt);
435 write(1,printbuf,i=vsprintf(printbuf, fmt, args));
436 va_end(args);
437 return i;
438 }
439
440 void init(void)
441 {
442 int pid,i;
443
444 setup();
445 sprintf(term, "TERM=con%dx%d", ORIG_VIDEO_COLS, ORIG_VIDEO_LINES);
446
447 #ifdef CONFIG_UMSDOS_FS
448 {
449
450
451
452
453
454 extern struct inode *pseudo_root;
455 if (pseudo_root != NULL){
456 current->fs->root = pseudo_root;
457 current->fs->pwd = pseudo_root;
458 }
459 }
460 #endif
461
462 (void) open("/dev/tty1",O_RDWR,0);
463 (void) dup(0);
464 (void) dup(0);
465
466 execve("/etc/init",argv_init,envp_init);
467 execve("/bin/init",argv_init,envp_init);
468 execve("/sbin/init",argv_init,envp_init);
469
470
471 if (!(pid=fork())) {
472 close(0);
473 if (open("/etc/rc",O_RDONLY,0))
474 _exit(1);
475 execve("/bin/sh",argv_rc,envp_rc);
476 _exit(2);
477 }
478 if (pid>0)
479 while (pid != wait(&i))
480 ;
481 while (1) {
482 if ((pid = fork()) < 0) {
483 printf("Fork failed in init\n\r");
484 continue;
485 }
486 if (!pid) {
487 close(0);close(1);close(2);
488 setsid();
489 (void) open("/dev/tty1",O_RDWR,0);
490 (void) dup(0);
491 (void) dup(0);
492 _exit(execve("/bin/sh",argv,envp));
493 }
494 while (1)
495 if (pid == wait(&i))
496 break;
497 printf("\n\rchild %d died with code %04x\n\r",pid,i);
498 sync();
499 }
500 _exit(0);
501 }