1 /* init_main.c 4.50 83/05/18 */ 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 #include "../machine/reg.h" 27 #include "../machine/cpu.h" 28 29 extern struct user u; /* have to declare it somewhere! */ 30 /* 31 * Initialization code. 32 * Called from cold start routine as 33 * soon as a stack and segmentation 34 * have been established. 35 * Functions: 36 * clear and free user core 37 * turn on clock 38 * hand craft 0th process 39 * call all initialization routines 40 * fork - process 0 to schedule 41 * - process 2 to page out 42 * - process 1 execute bootstrap 43 * 44 * loop at loc 13 (0xd) in user mode -- /etc/init 45 * cannot be executed. 46 */ 47 #ifdef vax 48 main(firstaddr) 49 int firstaddr; 50 #endif 51 #ifdef sun 52 main(regs) 53 struct regs regs; 54 #endif 55 { 56 register int i; 57 register struct proc *p; 58 struct fs *fs; 59 int s; 60 61 rqinit(); 62 #include "loop.h" 63 #ifdef vax 64 startup(firstaddr); 65 #endif 66 #ifdef sun 67 startup(); 68 #endif 69 70 /* 71 * set up system process 0 (swapper) 72 */ 73 p = &proc[0]; 74 p->p_p0br = u.u_pcb.pcb_p0br; 75 p->p_szpt = 1; 76 p->p_addr = uaddr(p); 77 p->p_stat = SRUN; 78 p->p_flag |= SLOAD|SSYS; 79 p->p_nice = NZERO; 80 setredzone(p->p_addr, (caddr_t)&u); 81 u.u_procp = p; 82 #ifdef sun 83 u.u_ar0 = ®s.r_r0; 84 #endif 85 u.u_cmask = CMASK; 86 for (i = 1; i < NGROUPS; i++) 87 u.u_groups[i] = NOGROUP; 88 for (i = 0; i < sizeof(u.u_rlimit)/sizeof(u.u_rlimit[0]); i++) 89 u.u_rlimit[i].rlim_cur = u.u_rlimit[i].rlim_max = 90 RLIM_INFINITY; 91 u.u_rlimit[RLIMIT_STACK].rlim_cur = 512*1024; 92 u.u_rlimit[RLIMIT_STACK].rlim_max = ctob(MAXDSIZ); 93 u.u_rlimit[RLIMIT_DATA].rlim_max = 94 u.u_rlimit[RLIMIT_DATA].rlim_cur = ctob(MAXDSIZ); 95 p->p_maxrss = RLIM_INFINITY/NBPG; 96 #ifdef QUOTA 97 qtinit(); 98 p->p_quota = u.u_quota = getquota(0, 0, Q_NDQ); 99 #endif 100 startrtclock(); 101 #ifdef KGCLOCK 102 startkgclock(); 103 #endif 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 pageout(); 174 /*NOTREACHED*/ 175 } 176 177 /* 178 * make init process and 179 * enter scheduling loop 180 */ 181 182 mpid = 0; 183 proc[1].p_stat = 0; 184 proc[0].p_szpt = CLSIZE; 185 if (newproc(0)) { 186 #ifdef vax 187 expand(clrnd((int)btoc(szicode)), 0); 188 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 189 (void) copyout((caddr_t)icode, (caddr_t)0, (unsigned)szicode); 190 #endif 191 #ifdef sun 192 icode(); 193 usetup(); 194 regs.r_context = u.u_procp->p_ctx->ctx_context; 195 #endif 196 /* 197 * Return goes to loc. 0 of user init 198 * code just copied out. 199 */ 200 return; 201 } 202 #ifdef MUSH 203 /* 204 * start MUSH daemon 205 * pid == 3 206 */ 207 if (newproc(0)) { 208 #ifdef vax 209 expand(clrnd((int)btoc(szmcode)), 0); 210 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 211 (void) copyout((caddr_t)mcode, (caddr_t)0, (unsigned)szmcode); 212 /* 213 * Return goes to loc. 0 of user mush 214 * code just copied out. 215 */ 216 return; 217 #endif 218 } 219 #endif 220 proc[0].p_szpt = 1; 221 sched(); 222 } 223 224 /* 225 * Initialize hash links for buffers. 226 */ 227 bhinit() 228 { 229 register int i; 230 register struct bufhd *bp; 231 232 for (bp = bufhash, i = 0; i < BUFHSZ; i++, bp++) 233 bp->b_forw = bp->b_back = (struct buf *)bp; 234 } 235 236 /* 237 * Initialize the buffer I/O system by freeing 238 * all buffers and setting all device buffer lists to empty. 239 */ 240 binit() 241 { 242 register struct buf *bp, *dp; 243 register int i; 244 struct swdevt *swp; 245 int base, residual; 246 247 for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) { 248 dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp; 249 dp->b_flags = B_HEAD; 250 } 251 base = bufpages / nbuf; 252 residual = bufpages % nbuf; 253 for (i = 0; i < nbuf; i++) { 254 bp = &buf[i]; 255 bp->b_dev = NODEV; 256 bp->b_bcount = 0; 257 #ifndef sun 258 bp->b_un.b_addr = buffers + i * MAXBSIZE; 259 if (i < residual) 260 bp->b_bufsize = (base + 1) * CLBYTES; 261 else 262 bp->b_bufsize = base * 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 nswap = 0; 279 for (swp = swdevt; swp->sw_dev; swp++) { 280 nswdev++; 281 if (swp->sw_nblks > nswap) 282 nswap = swp->sw_nblks; 283 } 284 if (nswdev == 0) 285 panic("binit"); 286 if (nswdev > 1) 287 nswap = ((nswap + dmmax - 1) / dmmax) * dmmax; 288 nswap *= nswdev; 289 maxpgio *= nswdev; 290 swfree(0); 291 } 292 293 /* 294 * Initialize linked list of free swap 295 * headers. These do not actually point 296 * to buffers, but rather to pages that 297 * are being swapped in and out. 298 */ 299 bswinit() 300 { 301 register int i; 302 register struct buf *sp = swbuf; 303 304 bswlist.av_forw = sp; 305 for (i=0; i<nswbuf-1; i++, sp++) 306 sp->av_forw = sp+1; 307 sp->av_forw = NULL; 308 } 309 310 /* 311 * Initialize clist by freeing all character blocks, then count 312 * number of character devices. (Once-only routine) 313 */ 314 cinit() 315 { 316 register int ccp; 317 register struct cblock *cp; 318 319 ccp = (int)cfree; 320 ccp = (ccp+CROUND) & ~CROUND; 321 for(cp=(struct cblock *)ccp; cp < &cfree[nclist-1]; cp++) { 322 cp->c_next = cfreelist; 323 cfreelist = cp; 324 cfreecount += CBSIZE; 325 } 326 } 327