1 /* init_main.c 6.3 84/05/22 */ 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 main(firstaddr) 48 int firstaddr; 49 { 50 register int i; 51 register struct proc *p; 52 struct fs *fs; 53 int s; 54 55 rqinit(); 56 #include "loop.h" 57 startup(firstaddr); 58 59 /* 60 * set up system process 0 (swapper) 61 */ 62 p = &proc[0]; 63 p->p_p0br = u.u_pcb.pcb_p0br; 64 p->p_szpt = 1; 65 p->p_addr = uaddr(p); 66 p->p_stat = SRUN; 67 p->p_flag |= SLOAD|SSYS; 68 p->p_nice = NZERO; 69 setredzone(p->p_addr, (caddr_t)&u); 70 u.u_procp = p; 71 u.u_cmask = CMASK; 72 for (i = 1; i < NGROUPS; i++) 73 u.u_groups[i] = NOGROUP; 74 for (i = 0; i < sizeof(u.u_rlimit)/sizeof(u.u_rlimit[0]); i++) 75 u.u_rlimit[i].rlim_cur = u.u_rlimit[i].rlim_max = 76 RLIM_INFINITY; 77 u.u_rlimit[RLIMIT_STACK].rlim_cur = 512*1024; 78 u.u_rlimit[RLIMIT_STACK].rlim_max = ctob(MAXSSIZ); 79 u.u_rlimit[RLIMIT_DATA].rlim_max = 80 u.u_rlimit[RLIMIT_DATA].rlim_cur = ctob(MAXDSIZ); 81 p->p_maxrss = RLIM_INFINITY/NBPG; 82 #if defined(QUOTA) 83 qtinit(); 84 p->p_quota = u.u_quota = getquota(0, 0, Q_NDQ); 85 #endif 86 startrtclock(); 87 #include "kg.h" 88 #if NKG > 0 89 startkgclock(); 90 #endif 91 92 /* 93 * Initialize tables, protocols, and set up well-known inodes. 94 */ 95 mbinit(); 96 cinit(); /* needed by dmc-11 driver */ 97 #ifdef INET 98 #if NLOOP > 0 99 loattach(); /* XXX */ 100 #endif 101 /* 102 * Block reception of incoming packets 103 * until protocols have been initialized. 104 */ 105 s = splimp(); 106 ifinit(); 107 #endif 108 domaininit(); 109 #ifdef INET 110 splx(s); 111 #endif 112 pqinit(); 113 ihinit(); 114 bhinit(); 115 binit(); 116 bswinit(); 117 nchinit(); 118 #ifdef GPROF 119 kmstartup(); 120 #endif 121 122 fs = mountfs(rootdev, 0, (struct inode *)0); 123 if (fs == 0) 124 panic("iinit"); 125 bcopy("/", fs->fs_fsmnt, 2); 126 127 inittodr(fs->fs_time); 128 boottime = time; 129 130 /* kick off timeout driven events by calling first time */ 131 roundrobin(); 132 schedcpu(); 133 schedpaging(); 134 135 /* set up the root file system */ 136 rootdir = iget(rootdev, fs, (ino_t)ROOTINO); 137 iunlock(rootdir); 138 u.u_cdir = iget(rootdev, fs, (ino_t)ROOTINO); 139 iunlock(u.u_cdir); 140 u.u_rdir = NULL; 141 142 u.u_dmap = zdmap; 143 u.u_smap = zdmap; 144 145 /* 146 * Set the scan rate and other parameters of the paging subsystem. 147 */ 148 setupclock(); 149 150 /* 151 * make page-out daemon (process 2) 152 * the daemon has ctopt(nswbuf*CLSIZE*KLMAX) pages of page 153 * table so that it can map dirty pages into 154 * its address space during asychronous pushes. 155 */ 156 mpid = 1; 157 proc[0].p_szpt = clrnd(ctopt(nswbuf*CLSIZE*KLMAX + UPAGES)); 158 proc[1].p_stat = SZOMB; /* force it to be in proc slot 2 */ 159 p = freeproc; 160 freeproc = p->p_nxt; 161 if (newproc(0)) { 162 proc[2].p_flag |= SLOAD|SSYS; 163 proc[2].p_dsize = u.u_dsize = nswbuf*CLSIZE*KLMAX; 164 pageout(); 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 p->p_nxt = freeproc; 177 freeproc = p; 178 if (newproc(0)) { 179 expand(clrnd((int)btoc(szicode)), 0); 180 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 181 (void) copyout((caddr_t)icode, (caddr_t)0, (unsigned)szicode); 182 /* 183 * Return goes to loc. 0 of user init 184 * code just copied out. 185 */ 186 return; 187 } 188 proc[0].p_szpt = 1; 189 sched(); 190 } 191 192 /* 193 * Initialize hash links for buffers. 194 */ 195 bhinit() 196 { 197 register int i; 198 register struct bufhd *bp; 199 200 for (bp = bufhash, i = 0; i < BUFHSZ; i++, bp++) 201 bp->b_forw = bp->b_back = (struct buf *)bp; 202 } 203 204 /* 205 * Initialize the buffer I/O system by freeing 206 * all buffers and setting all device buffer lists to empty. 207 */ 208 binit() 209 { 210 register struct buf *bp, *dp; 211 register int i; 212 struct swdevt *swp; 213 int base, residual; 214 215 for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) { 216 dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp; 217 dp->b_flags = B_HEAD; 218 } 219 base = bufpages / nbuf; 220 residual = bufpages % nbuf; 221 for (i = 0; i < nbuf; i++) { 222 bp = &buf[i]; 223 bp->b_dev = NODEV; 224 bp->b_bcount = 0; 225 bp->b_un.b_addr = buffers + i * MAXBSIZE; 226 if (i < residual) 227 bp->b_bufsize = (base + 1) * CLBYTES; 228 else 229 bp->b_bufsize = base * CLBYTES; 230 binshash(bp, &bfreelist[BQ_AGE]); 231 bp->b_flags = B_BUSY|B_INVAL; 232 brelse(bp); 233 } 234 /* 235 * Count swap devices, and adjust total swap space available. 236 * Some of this space will not be available until a vswapon() 237 * system is issued, usually when the system goes multi-user. 238 */ 239 nswdev = 0; 240 nswap = 0; 241 for (swp = swdevt; swp->sw_dev; swp++) { 242 nswdev++; 243 if (swp->sw_nblks > nswap) 244 nswap = swp->sw_nblks; 245 } 246 if (nswdev == 0) 247 panic("binit"); 248 if (nswdev > 1) 249 nswap = ((nswap + dmmax - 1) / dmmax) * dmmax; 250 nswap *= nswdev; 251 maxpgio *= nswdev; 252 swfree(0); 253 } 254 255 /* 256 * Initialize linked list of free swap 257 * headers. These do not actually point 258 * to buffers, but rather to pages that 259 * are being swapped in and out. 260 */ 261 bswinit() 262 { 263 register int i; 264 register struct buf *sp = swbuf; 265 266 bswlist.av_forw = sp; 267 for (i=0; i<nswbuf-1; i++, sp++) 268 sp->av_forw = sp+1; 269 sp->av_forw = NULL; 270 } 271 272 /* 273 * Initialize clist by freeing all character blocks, then count 274 * number of character devices. (Once-only routine) 275 */ 276 cinit() 277 { 278 register int ccp; 279 register struct cblock *cp; 280 281 ccp = (int)cfree; 282 ccp = (ccp+CROUND) & ~CROUND; 283 for(cp=(struct cblock *)ccp; cp < &cfree[nclist-1]; cp++) { 284 cp->c_next = cfreelist; 285 cfreelist = cp; 286 cfreecount += CBSIZE; 287 } 288 } 289