1 /* init_main.c 4.42 82/11/02 */ 2 3 #include "../h/param.h" 4 #include "../h/systm.h" 5 #include "../h/dir.h" 6 #include "../h/user.h" 7 #include "../h/kernel.h" 8 #include "../h/fs.h" 9 #include "../h/mount.h" 10 #include "../h/map.h" 11 #include "../h/proc.h" 12 #include "../h/inode.h" 13 #include "../h/seg.h" 14 #include "../h/conf.h" 15 #include "../h/buf.h" 16 #include "../h/pte.h" 17 #include "../h/vm.h" 18 #include "../h/cmap.h" 19 #include "../h/text.h" 20 #include "../h/clist.h" 21 #ifdef INET 22 #include "../h/protosw.h" 23 #endif 24 #include "../h/quota.h" 25 26 extern struct user u; /* have to declare it somewhere! */ 27 /* 28 * Initialization code. 29 * Called from cold start routine as 30 * soon as a stack and segmentation 31 * have been established. 32 * Functions: 33 * clear and free user core 34 * turn on clock 35 * hand craft 0th process 36 * call all initialization routines 37 * fork - process 0 to schedule 38 * - process 2 to page out 39 * - process 1 execute bootstrap 40 * 41 * loop at loc something in user mode -- /etc/init 42 * cannot be executed. 43 */ 44 #ifdef vax 45 main(firstaddr) 46 int firstaddr; 47 #endif 48 #ifdef sun 49 main(regs) 50 struct regs regs; 51 #endif 52 { 53 register int i; 54 register struct proc *p; 55 struct fs *fs; 56 57 rqinit(); 58 #include "loop.h" 59 #ifdef vax 60 startup(firstaddr); 61 #endif 62 #ifdef sun 63 startup(); 64 #endif 65 66 /* 67 * set up system process 0 (swapper) 68 */ 69 p = &proc[0]; 70 p->p_p0br = u.u_pcb.pcb_p0br; 71 p->p_szpt = 1; 72 p->p_addr = uaddr(p); 73 p->p_stat = SRUN; 74 p->p_flag |= SLOAD|SSYS; 75 p->p_nice = NZERO; 76 setredzone(p->p_addr, (caddr_t)&u); 77 u.u_procp = p; 78 #ifdef sun 79 u.u_ar0 = ®s.r0; 80 #endif 81 u.u_cmask = CMASK; 82 for (i = 1; i < NGROUPS; i++) 83 u.u_groups[i] = -1; 84 for (i = 0; i < sizeof(u.u_rlimit)/sizeof(u.u_rlimit[0]); i++) 85 u.u_rlimit[i].rlim_cur = u.u_rlimit[i].rlim_max = 86 RLIM_INFINITY; 87 u.u_rlimit[RLIMIT_STACK].rlim_cur = 512*1024; 88 u.u_rlimit[RLIMIT_STACK].rlim_max = ctob(MAXDSIZ); 89 u.u_rlimit[RLIMIT_DATA].rlim_max = 90 u.u_rlimit[RLIMIT_DATA].rlim_cur = ctob(MAXDSIZ); 91 p->p_maxrss = RLIM_INFINITY/NBPG; 92 #ifdef QUOTA 93 qtinit(); 94 p->p_quota = u.u_quota = getquota(0, 0, Q_NDQ); 95 #endif 96 startrtclock(); 97 98 /* 99 * Initialize tables, protocols, and set up well-known inodes. 100 */ 101 mbinit(); 102 cinit(); /* needed by dmc-11 driver */ 103 #ifdef INET 104 #if NLOOP > 0 105 loattach(); /* XXX */ 106 #endif 107 ifinit(); 108 #endif 109 domaininit(); 110 ihinit(); 111 bhinit(); 112 binit(); 113 bswinit(); 114 #ifdef GPROF 115 kmstartup(); 116 #endif 117 118 fs = mountfs(rootdev, 0, (struct inode *)0); 119 if (fs == 0) 120 panic("iinit"); 121 bcopy("/", fs->fs_fsmnt, 2); 122 123 inittodr(fs->fs_time); 124 boottime = time; 125 126 /* kick off timeout driven events by calling first time */ 127 roundrobin(); 128 schedcpu(); 129 schedpaging(); 130 131 /* set up the root file system */ 132 rootdir = iget(rootdev, fs, (ino_t)ROOTINO); 133 iunlock(rootdir); 134 u.u_cdir = iget(rootdev, fs, (ino_t)ROOTINO); 135 iunlock(u.u_cdir); 136 u.u_rdir = NULL; 137 138 u.u_dmap = zdmap; 139 u.u_smap = zdmap; 140 141 /* 142 * Set the scan rate and other parameters of the paging subsystem. 143 */ 144 setupclock(); 145 146 /* 147 * make page-out daemon (process 2) 148 * the daemon has ctopt(nswbuf*CLSIZE*KLMAX) pages of page 149 * table so that it can map dirty pages into 150 * its address space during asychronous pushes. 151 */ 152 mpid = 1; 153 proc[0].p_szpt = clrnd(ctopt(nswbuf*CLSIZE*KLMAX + UPAGES)); 154 proc[1].p_stat = SZOMB; /* force it to be in proc slot 2 */ 155 if (newproc(0)) { 156 proc[2].p_flag |= SLOAD|SSYS; 157 proc[2].p_dsize = u.u_dsize = nswbuf*CLSIZE*KLMAX; 158 #ifdef NOPAGING 159 for (;;) 160 sleep((caddr_t)&u, PSLEP); 161 #else 162 pageout(); 163 /*NOTREACHED*/ 164 #endif 165 } 166 167 /* 168 * make init process and 169 * enter scheduling loop 170 */ 171 172 mpid = 0; 173 proc[1].p_stat = 0; 174 proc[0].p_szpt = CLSIZE; 175 if (newproc(0)) { 176 #ifdef vax 177 expand(clrnd((int)btoc(szicode)), 0); 178 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 179 (void) copyout((caddr_t)icode, (caddr_t)0, (unsigned)szicode); 180 #endif 181 #ifdef sun 182 icode(); 183 usetup(); 184 regs.r_context = u.u_pcb.pcb_ctx->ctx_context; 185 #endif 186 /* 187 * Return goes to loc. 0 of user init 188 * code just copied out. 189 */ 190 return; 191 } 192 #ifdef MUSH 193 /* 194 * start MUSH daemon 195 * pid == 3 196 */ 197 if (newproc(0)) { 198 expand(clrnd((int)btoc(szmcode)), 0); 199 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 200 (void) copyout((caddr_t)mcode, (caddr_t)0, (unsigned)szmcode); 201 /* 202 * Return goes to loc. 0 of user mush 203 * code just copied out. 204 */ 205 return; 206 } 207 #endif 208 proc[0].p_szpt = 1; 209 sched(); 210 } 211 212 /* 213 * Initialize hash links for buffers. 214 */ 215 bhinit() 216 { 217 register int i; 218 register struct bufhd *bp; 219 220 for (bp = bufhash, i = 0; i < BUFHSZ; i++, bp++) 221 bp->b_forw = bp->b_back = (struct buf *)bp; 222 } 223 224 /* 225 * Initialize the buffer I/O system by freeing 226 * all buffers and setting all device buffer lists to empty. 227 */ 228 binit() 229 { 230 register struct buf *bp, *dp; 231 register int i; 232 struct swdevt *swp; 233 234 for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) { 235 dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp; 236 dp->b_flags = B_HEAD; 237 } 238 dp--; /* dp = &bfreelist[BQUEUES-1]; */ 239 for (i = 0; i < nbuf; i++) { 240 bp = &buf[i]; 241 bp->b_dev = NODEV; 242 bp->b_un.b_addr = buffers + i * MAXBSIZE; 243 bp->b_bcount = MAXBSIZE; 244 bp->b_back = dp; 245 bp->b_forw = dp->b_forw; 246 dp->b_forw->b_back = bp; 247 dp->b_forw = bp; 248 bp->b_flags = B_BUSY|B_INVAL; 249 brelse(bp); 250 } 251 /* 252 * Count swap devices, and adjust total swap space available. 253 * Some of this space will not be available until a vswapon() 254 * system is issued, usually when the system goes multi-user. 255 */ 256 nswdev = 0; 257 for (swp = swdevt; swp->sw_dev; swp++) 258 nswdev++; 259 if (nswdev == 0) 260 panic("binit"); 261 if (nswdev > 1) 262 nswap = (nswap/DMMAX)*DMMAX; 263 nswap *= nswdev; 264 maxpgio *= nswdev; 265 swfree(0); 266 } 267 268 /* 269 * Initialize linked list of free swap 270 * headers. These do not actually point 271 * to buffers, but rather to pages that 272 * are being swapped in and out. 273 */ 274 bswinit() 275 { 276 register int i; 277 register struct buf *sp = swbuf; 278 279 bswlist.av_forw = sp; 280 for (i=0; i<nswbuf-1; i++, sp++) 281 sp->av_forw = sp+1; 282 sp->av_forw = NULL; 283 } 284 285 /* 286 * Initialize clist by freeing all character blocks, then count 287 * number of character devices. (Once-only routine) 288 */ 289 cinit() 290 { 291 register int ccp; 292 register struct cblock *cp; 293 294 ccp = (int)cfree; 295 ccp = (ccp+CROUND) & ~CROUND; 296 for(cp=(struct cblock *)ccp; cp < &cfree[nclist-1]; cp++) { 297 cp->c_next = cfreelist; 298 cfreelist = cp; 299 cfreecount += CBSIZE; 300 } 301 } 302