1 /* init_main.c 4.41 82/10/31 */ 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 clockstart(); 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 /* initialize wall clock */ 124 clockinit(fs->fs_time); 125 boottime = time; 126 127 /* kick off timeout driven events by calling first time */ 128 roundrobin(); 129 schedcpu(); 130 schedpaging(); 131 132 /* set up the root file system */ 133 rootdir = iget(rootdev, fs, (ino_t)ROOTINO); 134 iunlock(rootdir); 135 u.u_cdir = iget(rootdev, fs, (ino_t)ROOTINO); 136 iunlock(u.u_cdir); 137 u.u_rdir = NULL; 138 139 u.u_dmap = zdmap; 140 u.u_smap = zdmap; 141 142 /* 143 * Set the scan rate and other parameters of the paging subsystem. 144 */ 145 setupclock(); 146 147 /* 148 * make page-out daemon (process 2) 149 * the daemon has ctopt(nswbuf*CLSIZE*KLMAX) pages of page 150 * table so that it can map dirty pages into 151 * its address space during asychronous pushes. 152 */ 153 mpid = 1; 154 proc[0].p_szpt = clrnd(ctopt(nswbuf*CLSIZE*KLMAX + UPAGES)); 155 proc[1].p_stat = SZOMB; /* force it to be in proc slot 2 */ 156 if (newproc(0)) { 157 proc[2].p_flag |= SLOAD|SSYS; 158 proc[2].p_dsize = u.u_dsize = nswbuf*CLSIZE*KLMAX; 159 #ifdef NOPAGING 160 for (;;) 161 sleep((caddr_t)&u, PSLEP); 162 #else 163 pageout(); 164 #endif 165 /*NOTREACHED*/ 166 } 167 168 /* 169 * make init process and 170 * enter scheduling loop 171 */ 172 173 mpid = 0; 174 proc[1].p_stat = 0; 175 proc[0].p_szpt = CLSIZE; 176 if (newproc(0)) { 177 #ifdef vax 178 expand(clrnd((int)btoc(szicode)), 0); 179 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 180 (void) copyout((caddr_t)icode, (caddr_t)0, (unsigned)szicode); 181 #endif 182 #ifdef sun 183 icode(); 184 usetup(); 185 regs.r_context = u.u_pcb.pcb_ctx->ctx_context; 186 #endif 187 /* 188 * Return goes to loc. 0 of user init 189 * code just copied out. 190 */ 191 return; 192 } 193 #ifdef MUSH 194 /* 195 * start MUSH daemon 196 * pid == 3 197 */ 198 if (newproc(0)) { 199 expand(clrnd((int)btoc(szmcode)), 0); 200 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 201 (void) copyout((caddr_t)mcode, (caddr_t)0, (unsigned)szmcode); 202 /* 203 * Return goes to loc. 0 of user mush 204 * code just copied out. 205 */ 206 return; 207 } 208 #endif 209 proc[0].p_szpt = 1; 210 sched(); 211 } 212 213 /* 214 * Initialize hash links for buffers. 215 */ 216 bhinit() 217 { 218 register int i; 219 register struct bufhd *bp; 220 221 for (bp = bufhash, i = 0; i < BUFHSZ; i++, bp++) 222 bp->b_forw = bp->b_back = (struct buf *)bp; 223 } 224 225 /* 226 * Initialize the buffer I/O system by freeing 227 * all buffers and setting all device buffer lists to empty. 228 */ 229 binit() 230 { 231 register struct buf *bp, *dp; 232 register int i; 233 struct swdevt *swp; 234 235 for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) { 236 dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp; 237 dp->b_flags = B_HEAD; 238 } 239 dp--; /* dp = &bfreelist[BQUEUES-1]; */ 240 for (i = 0; i < nbuf; i++) { 241 bp = &buf[i]; 242 bp->b_dev = NODEV; 243 bp->b_un.b_addr = buffers + i * MAXBSIZE; 244 bp->b_bcount = MAXBSIZE; 245 bp->b_back = dp; 246 bp->b_forw = dp->b_forw; 247 dp->b_forw->b_back = bp; 248 dp->b_forw = bp; 249 bp->b_flags = B_BUSY|B_INVAL; 250 brelse(bp); 251 } 252 /* 253 * Count swap devices, and adjust total swap space available. 254 * Some of this space will not be available until a vswapon() 255 * system is issued, usually when the system goes multi-user. 256 */ 257 nswdev = 0; 258 for (swp = swdevt; swp->sw_dev; swp++) 259 nswdev++; 260 if (nswdev == 0) 261 panic("binit"); 262 if (nswdev > 1) 263 nswap = (nswap/DMMAX)*DMMAX; 264 nswap *= nswdev; 265 maxpgio *= nswdev; 266 swfree(0); 267 } 268 269 /* 270 * Initialize linked list of free swap 271 * headers. These do not actually point 272 * to buffers, but rather to pages that 273 * are being swapped in and out. 274 */ 275 bswinit() 276 { 277 register int i; 278 register struct buf *sp = swbuf; 279 280 bswlist.av_forw = sp; 281 for (i=0; i<nswbuf-1; i++, sp++) 282 sp->av_forw = sp+1; 283 sp->av_forw = NULL; 284 } 285 286 /* 287 * Initialize clist by freeing all character blocks, then count 288 * number of character devices. (Once-only routine) 289 */ 290 cinit() 291 { 292 register int ccp; 293 register struct cblock *cp; 294 295 ccp = (int)cfree; 296 ccp = (ccp+CROUND) & ~CROUND; 297 for(cp=(struct cblock *)ccp; cp < &cfree[nclist-1]; cp++) { 298 cp->c_next = cfreelist; 299 cfreelist = cp; 300 cfreecount += CBSIZE; 301 } 302 } 303