1 /* 2 * Copyright (c) 1982, 1986, 1989, 1991 Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)init_main.c 7.53 (Berkeley) 07/19/92 8 */ 9 10 #include "param.h" 11 #include "filedesc.h" 12 #include "kernel.h" 13 #include "mount.h" 14 #include "map.h" 15 #include "proc.h" 16 #include "resourcevar.h" 17 #include "signalvar.h" 18 #include "systm.h" 19 #include "vnode.h" 20 #include "conf.h" 21 #include "buf.h" 22 #include "clist.h" 23 #include "protosw.h" 24 #include "reboot.h" 25 #include "user.h" 26 27 #include "ufs/ufs/quota.h" 28 29 #include "machine/cpu.h" 30 31 #include "vm/vm.h" 32 33 #ifdef HPFPLIB 34 char copyright[] = 35 "Copyright (c) 1982,1986,1989,1991 The Regents of the University of California.\nCopyright (c) 1992 Hewlett-Packard Company\nCopyright (c) 1992 Motorola Inc.\nAll rights reserved.\n\n"; 36 #else 37 char copyright[] = 38 "Copyright (c) 1982,1986,1989,1991 The Regents of the University of California.\nAll rights reserved.\n\n"; 39 #endif 40 41 /* 42 * Components of process 0; 43 * never freed. 44 */ 45 struct session session0; 46 struct pgrp pgrp0; 47 struct proc proc0; 48 struct pcred cred0; 49 struct filedesc0 filedesc0; 50 struct plimit limit0; 51 struct vmspace vmspace0; 52 struct proc *curproc = &proc0; 53 struct proc *initproc, *pageproc; 54 55 int cmask = CMASK; 56 extern struct user *proc0paddr; 57 extern int (*mountroot)(); 58 59 struct vnode *rootvp, *swapdev_vp; 60 int boothowto; 61 struct timeval boottime; 62 struct timeval runtime; 63 64 /* 65 * System startup; initialize the world, create process 0, 66 * mount root filesystem, and fork to create init and pagedaemon. 67 * Most of the hard work is done in the lower-level initialization 68 * routines including startup(), which does memory initialization 69 * and autoconfiguration. 70 */ 71 main() 72 { 73 register int i; 74 register struct proc *p; 75 register struct filedesc0 *fdp; 76 int s, rval[2]; 77 extern void roundrobin __P((void *)); 78 extern void schedcpu __P((void *)); 79 80 /* 81 * Initialize curproc before any possible traps/probes 82 * to simplify trap processing. 83 */ 84 p = &proc0; 85 curproc = p; 86 /* 87 * Attempt to find console and initialize 88 * in case of early panic or other messages. 89 */ 90 consinit(); 91 printf(copyright); 92 93 vm_mem_init(); 94 kmeminit(); 95 cpu_startup(); 96 97 /* 98 * set up system process 0 (swapper) 99 */ 100 p = &proc0; 101 curproc = p; 102 103 allproc = (volatile struct proc *)p; 104 p->p_prev = (struct proc **)&allproc; 105 p->p_pgrp = &pgrp0; 106 pgrphash[0] = &pgrp0; 107 pgrp0.pg_mem = p; 108 pgrp0.pg_session = &session0; 109 session0.s_count = 1; 110 session0.s_leader = p; 111 112 p->p_flag = SLOAD|SSYS; 113 p->p_stat = SRUN; 114 p->p_nice = NZERO; 115 bcopy("swapper", p->p_comm, sizeof ("swapper")); 116 117 /* 118 * Setup credentials 119 */ 120 cred0.p_refcnt = 1; 121 p->p_cred = &cred0; 122 p->p_ucred = crget(); 123 p->p_ucred->cr_ngroups = 1; /* group 0 */ 124 125 /* 126 * Create the file descriptor table for process 0. 127 */ 128 fdp = &filedesc0; 129 p->p_fd = &fdp->fd_fd; 130 fdp->fd_fd.fd_refcnt = 1; 131 fdp->fd_fd.fd_cmask = cmask; 132 fdp->fd_fd.fd_ofiles = fdp->fd_dfiles; 133 fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags; 134 fdp->fd_fd.fd_nfiles = NDFILE; 135 136 /* 137 * Set initial limits 138 */ 139 p->p_limit = &limit0; 140 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++) 141 limit0.pl_rlimit[i].rlim_cur = 142 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 143 limit0.pl_rlimit[RLIMIT_OFILE].rlim_cur = NOFILE; 144 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC; 145 limit0.p_refcnt = 1; 146 147 /* 148 * Allocate a prototype map so we have something to fork 149 */ 150 p->p_vmspace = &vmspace0; 151 vmspace0.vm_refcnt = 1; 152 pmap_pinit(&vmspace0.vm_pmap); 153 vm_map_init(&p->p_vmspace->vm_map, round_page(VM_MIN_ADDRESS), 154 trunc_page(VM_MAX_ADDRESS), TRUE); 155 vmspace0.vm_map.pmap = &vmspace0.vm_pmap; 156 p->p_addr = proc0paddr; /* XXX */ 157 158 /* 159 * We continue to place resource usage info 160 * and signal actions in the user struct so they're pageable. 161 */ 162 p->p_stats = &p->p_addr->u_stats; 163 p->p_sigacts = &p->p_addr->u_sigacts; 164 165 /* 166 * Initialize per uid information structure and charge 167 * root for one process. 168 */ 169 usrinfoinit(); 170 (void)chgproccnt(0, 1); 171 172 rqinit(); 173 174 /* 175 * configure virtual memory system, 176 * set vm rlimits 177 */ 178 vm_init_limits(p); 179 180 /* 181 * Initialize the file systems. 182 * 183 * Get vnodes for swapdev and rootdev. 184 */ 185 vfsinit(); 186 if (bdevvp(swapdev, &swapdev_vp) || bdevvp(rootdev, &rootvp)) 187 panic("can't setup bdevvp's"); 188 189 /* 190 * Start real time and statistics clocks. 191 */ 192 initclocks(); 193 194 /* 195 * Initialize tables, protocols, and set up well-known inodes. 196 */ 197 mbinit(); 198 cinit(); 199 #ifdef SYSVSHM 200 shminit(); 201 #endif 202 #include "sl.h" 203 #if NSL > 0 204 slattach(); /* XXX */ 205 #endif 206 #include "loop.h" 207 #if NLOOP > 0 208 loattach(); /* XXX */ 209 #endif 210 /* 211 * Block reception of incoming packets 212 * until protocols have been initialized. 213 */ 214 s = splimp(); 215 ifinit(); 216 domaininit(); 217 splx(s); 218 219 #ifdef GPROF 220 kmstartup(); 221 #endif 222 223 /* kick off timeout driven events by calling first time */ 224 roundrobin(NULL); 225 schedcpu(NULL); 226 227 /* 228 * Set up the root file system and vnode. 229 */ 230 if ((*mountroot)()) 231 panic("cannot mount root"); 232 /* 233 * Get vnode for '/'. 234 * Setup rootdir and fdp->fd_fd.fd_cdir to point to it. 235 */ 236 if (VFS_ROOT(rootfs, &rootdir)) 237 panic("cannot find root vnode"); 238 fdp->fd_fd.fd_cdir = rootdir; 239 VREF(fdp->fd_fd.fd_cdir); 240 VOP_UNLOCK(rootdir); 241 fdp->fd_fd.fd_rdir = NULL; 242 swapinit(); 243 244 /* 245 * Now can look at time, having had a chance 246 * to verify the time from the file system. 247 */ 248 p->p_stats->p_start = runtime = mono_time = boottime = time; 249 250 /* 251 * make init process 252 */ 253 siginit(p); 254 if (fork(p, NULL, rval)) 255 panic("fork init"); 256 if (rval[1]) { 257 extern int icode[]; /* user init code */ 258 extern int szicode; /* size of icode */ 259 static char initflags[] = "-sf"; 260 vm_offset_t addr; 261 char *ip; 262 263 /* 264 * Now in process 1. Set init flags into icode, get a minimal 265 * address space, copy out "icode", and return to it to do an 266 * exec of init. 267 */ 268 ip = initflags + 1; 269 if (boothowto&RB_SINGLE) 270 *ip++ = 's'; 271 #ifdef notyet 272 if (boothowto&RB_FASTBOOT) 273 *ip++ = 'f'; 274 #endif 275 if (ip == initflags + 1) 276 *ip++ = '-'; 277 *ip++ = '\0'; 278 279 addr = VM_MIN_ADDRESS; 280 initproc = p = curproc; 281 if (vm_allocate(&p->p_vmspace->vm_map, &addr, 282 round_page(szicode + sizeof(initflags)), FALSE) != 0 || 283 addr != VM_MIN_ADDRESS) 284 panic("init: couldn't allocate at zero"); 285 286 /* need just enough stack to exec from */ 287 addr = trunc_page(USRSTACK - PAGE_SIZE); 288 if (vm_allocate(&p->p_vmspace->vm_map, &addr, 289 PAGE_SIZE, FALSE) != KERN_SUCCESS) 290 panic("vm_allocate init stack"); 291 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 292 (void)copyout((caddr_t)icode, (caddr_t)VM_MIN_ADDRESS, 293 (u_int)szicode); 294 (void)copyout(initflags, (caddr_t)(VM_MIN_ADDRESS + szicode), 295 sizeof(initflags)); 296 return; /* returns to icode */ 297 } 298 299 /* 300 * Start up pageout daemon (process 2). 301 */ 302 if (fork(p, NULL, rval)) 303 panic("fork pager"); 304 if (rval[1]) { 305 /* 306 * Now in process 2. 307 */ 308 p = curproc; 309 pageproc = p; 310 p->p_flag |= SLOAD|SSYS; /* XXX */ 311 bcopy("pagedaemon", curproc->p_comm, sizeof ("pagedaemon")); 312 vm_pageout(); 313 /*NOTREACHED*/ 314 } 315 316 /* 317 * enter scheduling loop 318 */ 319 sched(); 320 } 321