1 /* init_main.c 4.44 82/12/17 */ 2 3 #include "../machine/pte.h" 4 5 #include "../h/param.h" 6 #include "../h/systm.h" 7 #include "../h/dir.h" 8 #include "../h/user.h" 9 #include "../h/kernel.h" 10 #include "../h/fs.h" 11 #include "../h/mount.h" 12 #include "../h/map.h" 13 #include "../h/proc.h" 14 #include "../h/inode.h" 15 #include "../h/seg.h" 16 #include "../h/conf.h" 17 #include "../h/buf.h" 18 #include "../h/vm.h" 19 #include "../h/cmap.h" 20 #include "../h/text.h" 21 #include "../h/clist.h" 22 #ifdef INET 23 #include "../h/protosw.h" 24 #endif 25 #include "../h/quota.h" 26 27 #ifdef sun 28 #include "../sun/reg.h" 29 #include "../sun/cpu.h" 30 #endif 31 32 extern struct user u; /* have to declare it somewhere! */ 33 /* 34 * Initialization code. 35 * Called from cold start routine as 36 * soon as a stack and segmentation 37 * have been established. 38 * Functions: 39 * clear and free user core 40 * turn on clock 41 * hand craft 0th process 42 * call all initialization routines 43 * fork - process 0 to schedule 44 * - process 2 to page out 45 * - process 1 execute bootstrap 46 * 47 * loop at loc 13 (0xd) in user mode -- /etc/init 48 * cannot be executed. 49 */ 50 #ifdef vax 51 main(firstaddr) 52 int firstaddr; 53 #endif 54 #ifdef sun 55 main(regs) 56 struct regs regs; 57 #endif 58 { 59 register int i; 60 register struct proc *p; 61 struct fs *fs; 62 int s; 63 64 rqinit(); 65 #include "loop.h" 66 #ifdef vax 67 startup(firstaddr); 68 #endif 69 #ifdef sun 70 startup(); 71 #endif 72 73 /* 74 * set up system process 0 (swapper) 75 */ 76 p = &proc[0]; 77 p->p_p0br = u.u_pcb.pcb_p0br; 78 p->p_szpt = 1; 79 p->p_addr = uaddr(p); 80 p->p_stat = SRUN; 81 p->p_flag |= SLOAD|SSYS; 82 p->p_nice = NZERO; 83 setredzone(p->p_addr, (caddr_t)&u); 84 u.u_procp = p; 85 #ifdef sun 86 u.u_ar0 = ®s.r_r0; 87 #endif 88 u.u_cmask = CMASK; 89 for (i = 1; i < NGROUPS; i++) 90 u.u_groups[i] = -1; 91 for (i = 0; i < sizeof(u.u_rlimit)/sizeof(u.u_rlimit[0]); i++) 92 u.u_rlimit[i].rlim_cur = u.u_rlimit[i].rlim_max = 93 RLIM_INFINITY; 94 u.u_rlimit[RLIMIT_STACK].rlim_cur = 512*1024; 95 u.u_rlimit[RLIMIT_STACK].rlim_max = ctob(MAXDSIZ); 96 u.u_rlimit[RLIMIT_DATA].rlim_max = 97 u.u_rlimit[RLIMIT_DATA].rlim_cur = ctob(MAXDSIZ); 98 p->p_maxrss = RLIM_INFINITY/NBPG; 99 #ifdef QUOTA 100 qtinit(); 101 p->p_quota = u.u_quota = getquota(0, 0, Q_NDQ); 102 #endif 103 startrtclock(); 104 105 /* 106 * Initialize tables, protocols, and set up well-known inodes. 107 */ 108 mbinit(); 109 cinit(); /* needed by dmc-11 driver */ 110 #ifdef INET 111 #if NLOOP > 0 112 loattach(); /* XXX */ 113 #endif 114 /* 115 * Block reception of incoming packets 116 * until protocols have been initialized. 117 */ 118 s = splimp(); 119 ifinit(); 120 #endif 121 domaininit(); 122 #ifdef INET 123 splx(s); 124 #endif 125 ihinit(); 126 bhinit(); 127 binit(); 128 bswinit(); 129 #ifdef GPROF 130 kmstartup(); 131 #endif 132 133 fs = mountfs(rootdev, 0, (struct inode *)0); 134 if (fs == 0) 135 panic("iinit"); 136 bcopy("/", fs->fs_fsmnt, 2); 137 138 inittodr(fs->fs_time); 139 boottime = time; 140 141 /* kick off timeout driven events by calling first time */ 142 roundrobin(); 143 schedcpu(); 144 schedpaging(); 145 146 /* set up the root file system */ 147 rootdir = iget(rootdev, fs, (ino_t)ROOTINO); 148 iunlock(rootdir); 149 u.u_cdir = iget(rootdev, fs, (ino_t)ROOTINO); 150 iunlock(u.u_cdir); 151 u.u_rdir = NULL; 152 153 u.u_dmap = zdmap; 154 u.u_smap = zdmap; 155 156 /* 157 * Set the scan rate and other parameters of the paging subsystem. 158 */ 159 setupclock(); 160 161 /* 162 * make page-out daemon (process 2) 163 * the daemon has ctopt(nswbuf*CLSIZE*KLMAX) pages of page 164 * table so that it can map dirty pages into 165 * its address space during asychronous pushes. 166 */ 167 mpid = 1; 168 proc[0].p_szpt = clrnd(ctopt(nswbuf*CLSIZE*KLMAX + UPAGES)); 169 proc[1].p_stat = SZOMB; /* force it to be in proc slot 2 */ 170 if (newproc(0)) { 171 proc[2].p_flag |= SLOAD|SSYS; 172 proc[2].p_dsize = u.u_dsize = nswbuf*CLSIZE*KLMAX; 173 #ifdef NOPAGING 174 for (;;) 175 sleep((caddr_t)&u, PSLEP); 176 /*NOTREACHED*/ 177 #else 178 pageout(); 179 /*NOTREACHED*/ 180 #endif 181 } 182 183 /* 184 * make init process and 185 * enter scheduling loop 186 */ 187 188 mpid = 0; 189 proc[1].p_stat = 0; 190 proc[0].p_szpt = CLSIZE; 191 if (newproc(0)) { 192 #ifdef vax 193 expand(clrnd((int)btoc(szicode)), 0); 194 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 195 (void) copyout((caddr_t)icode, (caddr_t)0, (unsigned)szicode); 196 #endif 197 #ifdef sun 198 icode(); 199 usetup(); 200 regs.r_context = u.u_pcb.pcb_ctx->ctx_context; 201 #endif 202 /* 203 * Return goes to loc. 0 of user init 204 * code just copied out. 205 */ 206 return; 207 } 208 #ifdef MUSH 209 /* 210 * start MUSH daemon 211 * pid == 3 212 */ 213 if (newproc(0)) { 214 #ifdef vax 215 expand(clrnd((int)btoc(szmcode)), 0); 216 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 217 (void) copyout((caddr_t)mcode, (caddr_t)0, (unsigned)szmcode); 218 /* 219 * Return goes to loc. 0 of user mush 220 * code just copied out. 221 */ 222 return; 223 #endif 224 } 225 #endif 226 proc[0].p_szpt = 1; 227 sched(); 228 } 229 230 /* 231 * Initialize hash links for buffers. 232 */ 233 bhinit() 234 { 235 register int i; 236 register struct bufhd *bp; 237 238 for (bp = bufhash, i = 0; i < BUFHSZ; i++, bp++) 239 bp->b_forw = bp->b_back = (struct buf *)bp; 240 } 241 242 /* 243 * Initialize the buffer I/O system by freeing 244 * all buffers and setting all device buffer lists to empty. 245 */ 246 binit() 247 { 248 register struct buf *bp, *dp; 249 register int i; 250 struct swdevt *swp; 251 252 for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) { 253 dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp; 254 dp->b_flags = B_HEAD; 255 } 256 for (i = 0; i < nbuf; i++) { 257 bp = &buf[i]; 258 bp->b_dev = NODEV; 259 bp->b_bcount = 0; 260 #ifndef sun 261 bp->b_un.b_addr = buffers + i * MAXBSIZE; 262 bp->b_bufsize = 2 * CLBYTES; 263 binshash(bp, &bfreelist[BQ_AGE]); 264 #else 265 bp->b_un.b_addr = (char *)0; 266 bp->b_bufsize = 0; 267 binshash(bp, &bfreelist[BQ_EMPTY]); 268 #endif 269 bp->b_flags = B_BUSY|B_INVAL; 270 brelse(bp); 271 } 272 /* 273 * Count swap devices, and adjust total swap space available. 274 * Some of this space will not be available until a vswapon() 275 * system is issued, usually when the system goes multi-user. 276 */ 277 nswdev = 0; 278 for (swp = swdevt; swp->sw_dev; swp++) 279 nswdev++; 280 if (nswdev == 0) 281 panic("binit"); 282 if (nswdev > 1) 283 nswap = (nswap/DMMAX)*DMMAX; 284 nswap *= nswdev; 285 maxpgio *= nswdev; 286 swfree(0); 287 } 288 289 /* 290 * Initialize linked list of free swap 291 * headers. These do not actually point 292 * to buffers, but rather to pages that 293 * are being swapped in and out. 294 */ 295 bswinit() 296 { 297 register int i; 298 register struct buf *sp = swbuf; 299 300 bswlist.av_forw = sp; 301 for (i=0; i<nswbuf-1; i++, sp++) 302 sp->av_forw = sp+1; 303 sp->av_forw = NULL; 304 } 305 306 /* 307 * Initialize clist by freeing all character blocks, then count 308 * number of character devices. (Once-only routine) 309 */ 310 cinit() 311 { 312 register int ccp; 313 register struct cblock *cp; 314 315 ccp = (int)cfree; 316 ccp = (ccp+CROUND) & ~CROUND; 317 for(cp=(struct cblock *)ccp; cp < &cfree[nclist-1]; cp++) { 318 cp->c_next = cfreelist; 319 cfreelist = cp; 320 cfreecount += CBSIZE; 321 } 322 } 323