1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1988 AT&T */ 27 /* All Rights Reserved */ 28 29 30 #pragma ident "%Z%%M% %I% %E% SMI" /* from SVr4.0 1.31 */ 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/sysmacros.h> 35 #include <sys/pcb.h> 36 #include <sys/systm.h> 37 #include <sys/signal.h> 38 #include <sys/cred.h> 39 #include <sys/user.h> 40 #include <sys/vfs.h> 41 #include <sys/vnode.h> 42 #include <sys/proc.h> 43 #include <sys/time.h> 44 #include <sys/file.h> 45 #include <sys/priocntl.h> 46 #include <sys/procset.h> 47 #include <sys/disp.h> 48 #include <sys/callo.h> 49 #include <sys/callb.h> 50 #include <sys/debug.h> 51 #include <sys/conf.h> 52 #include <sys/bootconf.h> 53 #include <sys/utsname.h> 54 #include <sys/cmn_err.h> 55 #include <sys/vmparam.h> 56 #include <sys/modctl.h> 57 #include <sys/vm.h> 58 #include <sys/callb.h> 59 #include <sys/kmem.h> 60 #include <sys/vmem.h> 61 #include <sys/cpuvar.h> 62 #include <sys/cladm.h> 63 #include <sys/corectl.h> 64 #include <sys/exec.h> 65 #include <sys/syscall.h> 66 #include <sys/reboot.h> 67 #include <sys/task.h> 68 #include <sys/exacct.h> 69 #include <sys/autoconf.h> 70 #include <sys/errorq.h> 71 #include <sys/class.h> 72 #include <sys/stack.h> 73 74 #include <vm/as.h> 75 #include <vm/seg_kmem.h> 76 #include <sys/dc_ki.h> 77 78 #include <c2/audit.h> 79 80 /* well known processes */ 81 proc_t *proc_sched; /* memory scheduler */ 82 proc_t *proc_init; /* init */ 83 proc_t *proc_pageout; /* pageout daemon */ 84 proc_t *proc_fsflush; /* fsflush daemon */ 85 86 pgcnt_t maxmem; /* Maximum available memory in pages. */ 87 pgcnt_t freemem; /* Current available memory in pages. */ 88 int audit_active; 89 int interrupts_unleashed; /* set when we do the first spl0() */ 90 91 kmem_cache_t *process_cache; /* kmem cache for proc structures */ 92 93 /* 94 * Process 0's lwp directory and lwpid hash table. 95 */ 96 lwpdir_t p0_lwpdir[2]; 97 lwpdir_t *p0_tidhash[2]; 98 lwpent_t p0_lep; 99 100 /* 101 * Machine-independent initialization code 102 * Called from cold start routine as 103 * soon as a stack and segmentation 104 * have been established. 105 * Functions: 106 * clear and free user core 107 * turn on clock 108 * hand craft 0th process 109 * call all initialization routines 110 * fork - process 0 to schedule 111 * - process 1 execute bootstrap 112 * - process 2 to page out 113 * create system threads 114 */ 115 116 int cluster_bootflags = 0; 117 118 void 119 cluster_wrapper(void) 120 { 121 cluster(); 122 panic("cluster() returned"); 123 } 124 125 char initname[INITNAME_SZ] = "/sbin/init"; 126 char initargs[INITARGS_SZ] = ""; 127 128 /* 129 * Start the initial user process. 130 * The program [initname] may be invoked with one argument 131 * containing the boot flags. 132 * 133 * It must be a 32-bit program. 134 */ 135 void 136 icode(void) 137 { 138 proc_t *p = ttoproc(curthread); 139 140 ASSERT_STACK_ALIGNED(); 141 142 /* 143 * Allocate user address space and stack segment 144 */ 145 proc_init = p; 146 zone0.zone_proc_initpid = proc_init->p_pid; 147 148 p->p_cstime = p->p_stime = p->p_cutime = p->p_utime = 0; 149 p->p_usrstack = (caddr_t)USRSTACK32; 150 p->p_model = DATAMODEL_ILP32; 151 p->p_stkprot = PROT_ZFOD & ~PROT_EXEC; 152 p->p_datprot = PROT_ZFOD & ~PROT_EXEC; 153 p->p_stk_ctl = INT32_MAX; 154 155 p->p_as = as_alloc(); 156 p->p_as->a_userlimit = (caddr_t)USERLIMIT32; 157 (void) hat_setup(p->p_as->a_hat, HAT_INIT); 158 init_core(); 159 160 init_mstate(curthread, LMS_SYSTEM); 161 162 if (exec_init(initname, 1, initargs[0] == '\0' ? NULL : initargs) != 0) 163 halt("Could not start init"); 164 165 lwp_rtt(); 166 } 167 168 int 169 exec_init(const char *initpath, int useboothowto, const char *args) 170 { 171 char *ucp; 172 caddr32_t *uap; 173 char *argv[4]; /* backwards */ 174 int argc = 0; 175 int error = 0, len, count = 0, i; 176 proc_t *p = ttoproc(curthread); 177 klwp_t *lwp = ttolwp(curthread); 178 179 /* 180 * Construct the exec arguments in userland. That is, make an array 181 * of pointers to the argument strings, just like for execv(). This 182 * is done backwards. 183 */ 184 ucp = p->p_usrstack; 185 186 argv[0] = NULL; /* argv terminator */ 187 188 if (args != NULL) { 189 len = strlen(args) + 1; 190 ucp -= len; 191 error |= copyoutstr(args, ucp, len, NULL); 192 argv[++argc] = ucp; 193 } 194 195 if (useboothowto && 196 boothowto & (RB_SINGLE|RB_RECONFIG|RB_VERBOSE)) { 197 error |= subyte(--ucp, '\0'); /* trailing null byte */ 198 199 if (boothowto & RB_SINGLE) 200 error |= subyte(--ucp, 's'); 201 if (boothowto & RB_RECONFIG) 202 error |= subyte(--ucp, 'r'); 203 if (boothowto & RB_VERBOSE) 204 error |= subyte(--ucp, 'v'); 205 error |= subyte(--ucp, '-'); /* leading hyphen */ 206 207 argv[++argc] = ucp; 208 } 209 210 len = strlen(initpath) + 1; 211 ucp -= len; 212 error |= copyoutstr(initpath, ucp, len, NULL); 213 argv[++argc] = ucp; 214 215 /* 216 * Move out the arg pointers. 217 */ 218 uap = (caddr32_t *)P2ALIGN((uintptr_t)ucp, sizeof (caddr32_t)); 219 for (i = 0; i < argc + 1; ++i) 220 error |= suword32(--uap, (uint32_t)(uintptr_t)argv[i]); 221 222 if (error != 0) { 223 zcmn_err(p->p_zone->zone_id, CE_WARN, 224 "Could not construct stack for init.\n"); 225 return (EFAULT); 226 } 227 228 /* 229 * Point at the arguments. 230 */ 231 lwp->lwp_ap = lwp->lwp_arg; 232 lwp->lwp_arg[0] = (uintptr_t)argv[argc]; 233 lwp->lwp_arg[1] = (uintptr_t)uap; 234 lwp->lwp_arg[2] = NULL; 235 curthread->t_post_sys = 1; 236 curthread->t_sysnum = SYS_execve; 237 238 again: 239 error = exec_common((const char *)argv[argc], (const char **)uap, NULL); 240 241 /* 242 * Normally we would just set lwp_argsaved and t_post_sys and 243 * let post_syscall reset lwp_ap for us. Unfortunately, 244 * exec_init isn't always called from a system call. Instead 245 * of making a mess of trap_cleanup, we just reset the args 246 * pointer here. 247 */ 248 reset_syscall_args(); 249 250 switch (error) { 251 case 0: 252 return (0); 253 254 case ENOENT: 255 zcmn_err(p->p_zone->zone_id, CE_WARN, 256 "exec(%s) failed (file not found).\n", initpath); 257 return (ENOENT); 258 259 case EAGAIN: 260 case EINTR: 261 ++count; 262 if (count < 5) { 263 zcmn_err(p->p_zone->zone_id, CE_WARN, 264 "exec(%s) failed with errno %d. Retrying...\n", 265 initpath, error); 266 goto again; 267 } 268 } 269 270 zcmn_err(p->p_zone->zone_id, CE_WARN, 271 "exec(%s) failed with errno %d.", initpath, error); 272 return (error); 273 } 274 275 void 276 main(void) 277 { 278 proc_t *p = ttoproc(curthread); /* &p0 */ 279 int (**initptr)(); 280 extern void sched(); 281 extern void fsflush(); 282 extern void thread_reaper(); 283 extern int (*init_tbl[])(); 284 extern int (*mp_init_tbl[])(); 285 extern id_t syscid, defaultcid; 286 extern int swaploaded; 287 extern int netboot; 288 extern void vm_init(void); 289 extern void cbe_init(void); 290 extern void clock_init(void); 291 extern void physio_bufs_init(void); 292 extern void pm_cfb_setup_intr(void); 293 extern int pm_adjust_timestamps(dev_info_t *, void *); 294 extern void start_other_cpus(int); 295 extern void sysevent_evc_thrinit(); 296 extern void lgrp_main_init(void); 297 extern void lgrp_main_mp_init(void); 298 299 /* 300 * In the horrible world of x86 in-lines, you can't get symbolic 301 * structure offsets a la genassym. This assertion is here so 302 * that the next poor slob who innocently changes the offset of 303 * cpu_thread doesn't waste as much time as I just did finding 304 * out that it's hard-coded in i86/ml/i86.il. Similarly for 305 * curcpup. You're welcome. 306 */ 307 ASSERT(CPU == CPU->cpu_self); 308 ASSERT(curthread == CPU->cpu_thread); 309 ASSERT_STACK_ALIGNED(); 310 311 /* 312 * Setup the first lgroup, and home t0 313 */ 314 lgrp_setup(); 315 316 startup(); 317 segkmem_gc(); 318 callb_init(); 319 callout_init(); /* callout table MUST be init'd before clock starts */ 320 cbe_init(); 321 clock_init(); 322 323 /* 324 * May need to probe to determine latencies from CPU 0 after 325 * gethrtime() comes alive in cbe_init() and before enabling interrupts 326 */ 327 lgrp_plat_probe(); 328 329 /* 330 * Call all system initialization functions. 331 */ 332 for (initptr = &init_tbl[0]; *initptr; initptr++) 333 (**initptr)(); 334 335 /* 336 * initialize vm related stuff. 337 */ 338 vm_init(); 339 340 /* 341 * initialize buffer pool for raw I/O requests 342 */ 343 physio_bufs_init(); 344 345 ttolwp(curthread)->lwp_error = 0; /* XXX kludge for SCSI driver */ 346 347 /* 348 * Drop the interrupt level and allow interrupts. At this point 349 * the DDI guarantees that interrupts are enabled. 350 */ 351 (void) spl0(); 352 interrupts_unleashed = 1; 353 354 vfs_mountroot(); /* Mount the root file system */ 355 errorq_init(); /* after vfs_mountroot() so DDI root is ready */ 356 cpu_kstat_init(CPU); /* after vfs_mountroot() so TOD is valid */ 357 ddi_walk_devs(ddi_root_node(), pm_adjust_timestamps, NULL); 358 /* after vfs_mountroot() so hrestime is valid */ 359 360 post_startup(); 361 swaploaded = 1; 362 363 /* 364 * Initial C2 audit system 365 */ 366 #ifdef C2_AUDIT 367 audit_init(); /* C2 hook */ 368 #endif 369 370 /* 371 * Plumb the protocol modules and drivers only if we are not 372 * networked booted, in this case we already did it in rootconf(). 373 */ 374 if (netboot == 0) 375 (void) strplumb(); 376 377 gethrestime(&u.u_start); 378 curthread->t_start = u.u_start.tv_sec; 379 p->p_mstart = gethrtime(); 380 381 /* 382 * Perform setup functions that can only be done after root 383 * and swap have been set up. 384 */ 385 consconfig(); 386 #if defined(__i386) || defined(__amd64) 387 release_bootstrap(); 388 #endif 389 /* 390 * attach drivers with ddi-forceattach prop 391 * This must be done after consconfig() to prevent usb key/mouse 392 * from attaching before the upper console stream is plumbed. 393 * It must be done early enough to load hotplug drivers (e.g. 394 * pcmcia nexus) so that devices enumerated via hotplug is 395 * available before I/O subsystem is fully initialized. 396 */ 397 i_ddi_forceattach_drivers(); 398 399 /* 400 * Set the scan rate and other parameters of the paging subsystem. 401 */ 402 setupclock(0); 403 404 /* 405 * Create kmem cache for proc structures 406 */ 407 process_cache = kmem_cache_create("process_cache", sizeof (proc_t), 408 0, NULL, NULL, NULL, NULL, NULL, 0); 409 410 /* 411 * Initialize process 0's lwp directory and lwpid hash table. 412 */ 413 p->p_lwpdir = p->p_lwpfree = p0_lwpdir; 414 p->p_lwpdir->ld_next = p->p_lwpdir + 1; 415 p->p_lwpdir_sz = 2; 416 p->p_tidhash = p0_tidhash; 417 p->p_tidhash_sz = 2; 418 p0_lep.le_thread = curthread; 419 p0_lep.le_lwpid = curthread->t_tid; 420 p0_lep.le_start = curthread->t_start; 421 lwp_hash_in(p, &p0_lep); 422 423 /* 424 * Initialize extended accounting. 425 */ 426 exacct_init(); 427 428 /* 429 * Initialize threads of sysevent event channels 430 */ 431 sysevent_evc_thrinit(); 432 433 /* 434 * main lgroup initialization 435 * This must be done after post_startup(), but before 436 * start_other_cpus() 437 */ 438 lgrp_main_init(); 439 440 /* 441 * Perform MP initialization, if any. 442 */ 443 start_other_cpus(0); 444 445 /* 446 * Finish lgrp initialization after all CPUS are brought online. 447 */ 448 lgrp_main_mp_init(); 449 450 /* 451 * After mp_init(), number of cpus are known (this is 452 * true for the time being, when there are actually 453 * hot pluggable cpus then this scheme would not do). 454 * Any per cpu initialization is done here. 455 */ 456 kmem_mp_init(); 457 vmem_update(NULL); 458 459 for (initptr = &mp_init_tbl[0]; *initptr; initptr++) 460 (**initptr)(); 461 462 /* 463 * This must be called after start_other_cpus 464 */ 465 pm_cfb_setup_intr(); 466 467 /* 468 * Make init process; enter scheduling loop with system process. 469 */ 470 471 /* create init process */ 472 if (newproc(icode, NULL, defaultcid, 59, NULL)) 473 panic("main: unable to fork init."); 474 475 /* create pageout daemon */ 476 if (newproc(pageout, NULL, syscid, maxclsyspri - 1, NULL)) 477 panic("main: unable to fork pageout()"); 478 479 /* create fsflush daemon */ 480 if (newproc(fsflush, NULL, syscid, minclsyspri, NULL)) 481 panic("main: unable to fork fsflush()"); 482 483 /* create cluster process if we're a member of one */ 484 if (cluster_bootflags & CLUSTER_BOOTED) { 485 if (newproc(cluster_wrapper, NULL, syscid, minclsyspri, NULL)) 486 panic("main: unable to fork cluster()"); 487 } 488 489 /* 490 * Create system threads (threads are associated with p0) 491 */ 492 493 /* create thread_reaper daemon */ 494 (void) thread_create(NULL, 0, (void (*)())thread_reaper, 495 NULL, 0, &p0, TS_RUN, minclsyspri); 496 497 /* create module uninstall daemon */ 498 /* BugID 1132273. If swapping over NFS need a bigger stack */ 499 (void) thread_create(NULL, 0, (void (*)())mod_uninstall_daemon, 500 NULL, 0, &p0, TS_RUN, minclsyspri); 501 502 (void) thread_create(NULL, 0, seg_pasync_thread, 503 NULL, 0, &p0, TS_RUN, minclsyspri); 504 505 pid_setmin(); 506 507 bcopy("sched", u.u_psargs, 6); 508 bcopy("sched", u.u_comm, 5); 509 sched(); 510 /* NOTREACHED */ 511 } 512