1 /* init_main.c 4.52 83/05/30 */ 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 #include "kg.h" 102 #if NKG > 0 103 startkgclock(); 104 #endif 105 106 /* 107 * Initialize tables, protocols, and set up well-known inodes. 108 */ 109 mbinit(); 110 cinit(); /* needed by dmc-11 driver */ 111 #ifdef INET 112 #if NLOOP > 0 113 loattach(); /* XXX */ 114 #endif 115 /* 116 * Block reception of incoming packets 117 * until protocols have been initialized. 118 */ 119 s = splimp(); 120 ifinit(); 121 #endif 122 domaininit(); 123 #ifdef INET 124 splx(s); 125 #endif 126 ihinit(); 127 bhinit(); 128 binit(); 129 bswinit(); 130 #ifdef GPROF 131 kmstartup(); 132 #endif 133 134 fs = mountfs(rootdev, 0, (struct inode *)0); 135 if (fs == 0) 136 panic("iinit"); 137 bcopy("/", fs->fs_fsmnt, 2); 138 139 inittodr(fs->fs_time); 140 boottime = time; 141 142 /* kick off timeout driven events by calling first time */ 143 roundrobin(); 144 schedcpu(); 145 schedpaging(); 146 147 /* set up the root file system */ 148 rootdir = iget(rootdev, fs, (ino_t)ROOTINO); 149 iunlock(rootdir); 150 u.u_cdir = iget(rootdev, fs, (ino_t)ROOTINO); 151 iunlock(u.u_cdir); 152 u.u_rdir = NULL; 153 154 u.u_dmap = zdmap; 155 u.u_smap = zdmap; 156 157 /* 158 * Set the scan rate and other parameters of the paging subsystem. 159 */ 160 setupclock(); 161 162 /* 163 * make page-out daemon (process 2) 164 * the daemon has ctopt(nswbuf*CLSIZE*KLMAX) pages of page 165 * table so that it can map dirty pages into 166 * its address space during asychronous pushes. 167 */ 168 mpid = 1; 169 proc[0].p_szpt = clrnd(ctopt(nswbuf*CLSIZE*KLMAX + UPAGES)); 170 proc[1].p_stat = SZOMB; /* force it to be in proc slot 2 */ 171 if (newproc(0)) { 172 proc[2].p_flag |= SLOAD|SSYS; 173 proc[2].p_dsize = u.u_dsize = nswbuf*CLSIZE*KLMAX; 174 pageout(); 175 /*NOTREACHED*/ 176 } 177 178 /* 179 * make init process and 180 * enter scheduling loop 181 */ 182 183 mpid = 0; 184 proc[1].p_stat = 0; 185 proc[0].p_szpt = CLSIZE; 186 if (newproc(0)) { 187 #ifdef vax 188 expand(clrnd((int)btoc(szicode)), 0); 189 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 190 (void) copyout((caddr_t)icode, (caddr_t)0, (unsigned)szicode); 191 #endif 192 #ifdef sun 193 icode(); 194 usetup(); 195 regs.r_context = u.u_procp->p_ctx->ctx_context; 196 #endif 197 /* 198 * Return goes to loc. 0 of user init 199 * code just copied out. 200 */ 201 return; 202 } 203 proc[0].p_szpt = 1; 204 sched(); 205 } 206 207 /* 208 * Initialize hash links for buffers. 209 */ 210 bhinit() 211 { 212 register int i; 213 register struct bufhd *bp; 214 215 for (bp = bufhash, i = 0; i < BUFHSZ; i++, bp++) 216 bp->b_forw = bp->b_back = (struct buf *)bp; 217 } 218 219 /* 220 * Initialize the buffer I/O system by freeing 221 * all buffers and setting all device buffer lists to empty. 222 */ 223 binit() 224 { 225 register struct buf *bp, *dp; 226 register int i; 227 struct swdevt *swp; 228 int base, residual; 229 230 for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) { 231 dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp; 232 dp->b_flags = B_HEAD; 233 } 234 base = bufpages / nbuf; 235 residual = bufpages % nbuf; 236 for (i = 0; i < nbuf; i++) { 237 bp = &buf[i]; 238 bp->b_dev = NODEV; 239 bp->b_bcount = 0; 240 #ifndef sun 241 bp->b_un.b_addr = buffers + i * MAXBSIZE; 242 if (i < residual) 243 bp->b_bufsize = (base + 1) * CLBYTES; 244 else 245 bp->b_bufsize = base * CLBYTES; 246 binshash(bp, &bfreelist[BQ_AGE]); 247 #else 248 bp->b_un.b_addr = (char *)0; 249 bp->b_bufsize = 0; 250 binshash(bp, &bfreelist[BQ_EMPTY]); 251 #endif 252 bp->b_flags = B_BUSY|B_INVAL; 253 brelse(bp); 254 } 255 /* 256 * Count swap devices, and adjust total swap space available. 257 * Some of this space will not be available until a vswapon() 258 * system is issued, usually when the system goes multi-user. 259 */ 260 nswdev = 0; 261 nswap = 0; 262 for (swp = swdevt; swp->sw_dev; swp++) { 263 nswdev++; 264 if (swp->sw_nblks > nswap) 265 nswap = swp->sw_nblks; 266 } 267 if (nswdev == 0) 268 panic("binit"); 269 if (nswdev > 1) 270 nswap = ((nswap + dmmax - 1) / dmmax) * dmmax; 271 nswap *= nswdev; 272 maxpgio *= nswdev; 273 swfree(0); 274 } 275 276 /* 277 * Initialize linked list of free swap 278 * headers. These do not actually point 279 * to buffers, but rather to pages that 280 * are being swapped in and out. 281 */ 282 bswinit() 283 { 284 register int i; 285 register struct buf *sp = swbuf; 286 287 bswlist.av_forw = sp; 288 for (i=0; i<nswbuf-1; i++, sp++) 289 sp->av_forw = sp+1; 290 sp->av_forw = NULL; 291 } 292 293 /* 294 * Initialize clist by freeing all character blocks, then count 295 * number of character devices. (Once-only routine) 296 */ 297 cinit() 298 { 299 register int ccp; 300 register struct cblock *cp; 301 302 ccp = (int)cfree; 303 ccp = (ccp+CROUND) & ~CROUND; 304 for(cp=(struct cblock *)ccp; cp < &cfree[nclist-1]; cp++) { 305 cp->c_next = cfreelist; 306 cfreelist = cp; 307 cfreecount += CBSIZE; 308 } 309 } 310