1 /* init_main.c 6.4 84/07/08 */ 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 #ifdef vax 72 /* 73 * This assumes that the u. area is always mapped 74 * to the same physical address. Otherwise must be 75 * handled when copying the u. area in newproc(). 76 */ 77 u.u_nd.ni_iov = &u.u_nd.ni_iovec; 78 #endif 79 u.u_nd.ni_iovcnt = 1; 80 u.u_cmask = CMASK; 81 for (i = 1; i < NGROUPS; i++) 82 u.u_groups[i] = NOGROUP; 83 for (i = 0; i < sizeof(u.u_rlimit)/sizeof(u.u_rlimit[0]); i++) 84 u.u_rlimit[i].rlim_cur = u.u_rlimit[i].rlim_max = 85 RLIM_INFINITY; 86 u.u_rlimit[RLIMIT_STACK].rlim_cur = 512*1024; 87 u.u_rlimit[RLIMIT_STACK].rlim_max = ctob(MAXSSIZ); 88 u.u_rlimit[RLIMIT_DATA].rlim_max = 89 u.u_rlimit[RLIMIT_DATA].rlim_cur = ctob(MAXDSIZ); 90 p->p_maxrss = RLIM_INFINITY/NBPG; 91 #if defined(QUOTA) 92 qtinit(); 93 p->p_quota = u.u_quota = getquota(0, 0, Q_NDQ); 94 #endif 95 startrtclock(); 96 #include "kg.h" 97 #if NKG > 0 98 startkgclock(); 99 #endif 100 101 /* 102 * Initialize tables, protocols, and set up well-known inodes. 103 */ 104 mbinit(); 105 cinit(); /* needed by dmc-11 driver */ 106 #ifdef INET 107 #if NLOOP > 0 108 loattach(); /* XXX */ 109 #endif 110 /* 111 * Block reception of incoming packets 112 * until protocols have been initialized. 113 */ 114 s = splimp(); 115 ifinit(); 116 #endif 117 domaininit(); 118 #ifdef INET 119 splx(s); 120 #endif 121 pqinit(); 122 ihinit(); 123 bhinit(); 124 binit(); 125 bswinit(); 126 nchinit(); 127 #ifdef GPROF 128 kmstartup(); 129 #endif 130 131 fs = mountfs(rootdev, 0, (struct inode *)0); 132 if (fs == 0) 133 panic("iinit"); 134 bcopy("/", fs->fs_fsmnt, 2); 135 136 inittodr(fs->fs_time); 137 boottime = time; 138 139 /* kick off timeout driven events by calling first time */ 140 roundrobin(); 141 schedcpu(); 142 schedpaging(); 143 144 /* set up the root file system */ 145 rootdir = iget(rootdev, fs, (ino_t)ROOTINO); 146 iunlock(rootdir); 147 u.u_cdir = iget(rootdev, fs, (ino_t)ROOTINO); 148 iunlock(u.u_cdir); 149 u.u_rdir = NULL; 150 151 u.u_dmap = zdmap; 152 u.u_smap = zdmap; 153 154 /* 155 * Set the scan rate and other parameters of the paging subsystem. 156 */ 157 setupclock(); 158 159 /* 160 * make page-out daemon (process 2) 161 * the daemon has ctopt(nswbuf*CLSIZE*KLMAX) pages of page 162 * table so that it can map dirty pages into 163 * its address space during asychronous pushes. 164 */ 165 mpid = 1; 166 proc[0].p_szpt = clrnd(ctopt(nswbuf*CLSIZE*KLMAX + UPAGES)); 167 proc[1].p_stat = SZOMB; /* force it to be in proc slot 2 */ 168 p = freeproc; 169 freeproc = p->p_nxt; 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 p->p_nxt = freeproc; 186 freeproc = p; 187 if (newproc(0)) { 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 /* 192 * Return goes to loc. 0 of user init 193 * code just copied out. 194 */ 195 return; 196 } 197 proc[0].p_szpt = 1; 198 sched(); 199 } 200 201 /* 202 * Initialize hash links for buffers. 203 */ 204 bhinit() 205 { 206 register int i; 207 register struct bufhd *bp; 208 209 for (bp = bufhash, i = 0; i < BUFHSZ; i++, bp++) 210 bp->b_forw = bp->b_back = (struct buf *)bp; 211 } 212 213 /* 214 * Initialize the buffer I/O system by freeing 215 * all buffers and setting all device buffer lists to empty. 216 */ 217 binit() 218 { 219 register struct buf *bp, *dp; 220 register int i; 221 struct swdevt *swp; 222 int base, residual; 223 224 for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) { 225 dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp; 226 dp->b_flags = B_HEAD; 227 } 228 base = bufpages / nbuf; 229 residual = bufpages % nbuf; 230 for (i = 0; i < nbuf; i++) { 231 bp = &buf[i]; 232 bp->b_dev = NODEV; 233 bp->b_bcount = 0; 234 bp->b_un.b_addr = buffers + i * MAXBSIZE; 235 if (i < residual) 236 bp->b_bufsize = (base + 1) * CLBYTES; 237 else 238 bp->b_bufsize = base * CLBYTES; 239 binshash(bp, &bfreelist[BQ_AGE]); 240 bp->b_flags = B_BUSY|B_INVAL; 241 brelse(bp); 242 } 243 /* 244 * Count swap devices, and adjust total swap space available. 245 * Some of this space will not be available until a vswapon() 246 * system is issued, usually when the system goes multi-user. 247 */ 248 nswdev = 0; 249 nswap = 0; 250 for (swp = swdevt; swp->sw_dev; swp++) { 251 nswdev++; 252 if (swp->sw_nblks > nswap) 253 nswap = swp->sw_nblks; 254 } 255 if (nswdev == 0) 256 panic("binit"); 257 if (nswdev > 1) 258 nswap = ((nswap + dmmax - 1) / dmmax) * dmmax; 259 nswap *= nswdev; 260 maxpgio *= nswdev; 261 swfree(0); 262 } 263 264 /* 265 * Initialize linked list of free swap 266 * headers. These do not actually point 267 * to buffers, but rather to pages that 268 * are being swapped in and out. 269 */ 270 bswinit() 271 { 272 register int i; 273 register struct buf *sp = swbuf; 274 275 bswlist.av_forw = sp; 276 for (i=0; i<nswbuf-1; i++, sp++) 277 sp->av_forw = sp+1; 278 sp->av_forw = NULL; 279 } 280 281 /* 282 * Initialize clist by freeing all character blocks, then count 283 * number of character devices. (Once-only routine) 284 */ 285 cinit() 286 { 287 register int ccp; 288 register struct cblock *cp; 289 290 ccp = (int)cfree; 291 ccp = (ccp+CROUND) & ~CROUND; 292 for(cp=(struct cblock *)ccp; cp < &cfree[nclist-1]; cp++) { 293 cp->c_next = cfreelist; 294 cfreelist = cp; 295 cfreecount += CBSIZE; 296 } 297 } 298