1 /* init_main.c 6.2 84/01/03 */ 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(MAXDSIZ); 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 #ifdef 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 ihinit(); 113 bhinit(); 114 binit(); 115 bswinit(); 116 nchinit(); 117 #ifdef GPROF 118 kmstartup(); 119 #endif 120 121 fs = mountfs(rootdev, 0, (struct inode *)0); 122 if (fs == 0) 123 panic("iinit"); 124 bcopy("/", fs->fs_fsmnt, 2); 125 126 inittodr(fs->fs_time); 127 boottime = time; 128 129 /* kick off timeout driven events by calling first time */ 130 roundrobin(); 131 schedcpu(); 132 schedpaging(); 133 134 /* set up the root file system */ 135 rootdir = iget(rootdev, fs, (ino_t)ROOTINO); 136 iunlock(rootdir); 137 u.u_cdir = iget(rootdev, fs, (ino_t)ROOTINO); 138 iunlock(u.u_cdir); 139 u.u_rdir = NULL; 140 141 u.u_dmap = zdmap; 142 u.u_smap = zdmap; 143 144 /* 145 * Set the scan rate and other parameters of the paging subsystem. 146 */ 147 setupclock(); 148 149 /* 150 * make page-out daemon (process 2) 151 * the daemon has ctopt(nswbuf*CLSIZE*KLMAX) pages of page 152 * table so that it can map dirty pages into 153 * its address space during asychronous pushes. 154 */ 155 mpid = 1; 156 proc[0].p_szpt = clrnd(ctopt(nswbuf*CLSIZE*KLMAX + UPAGES)); 157 proc[1].p_stat = SZOMB; /* force it to be in proc slot 2 */ 158 if (newproc(0)) { 159 proc[2].p_flag |= SLOAD|SSYS; 160 proc[2].p_dsize = u.u_dsize = nswbuf*CLSIZE*KLMAX; 161 pageout(); 162 /*NOTREACHED*/ 163 } 164 165 /* 166 * make init process and 167 * enter scheduling loop 168 */ 169 170 mpid = 0; 171 proc[1].p_stat = 0; 172 proc[0].p_szpt = CLSIZE; 173 if (newproc(0)) { 174 expand(clrnd((int)btoc(szicode)), 0); 175 (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); 176 (void) copyout((caddr_t)icode, (caddr_t)0, (unsigned)szicode); 177 /* 178 * Return goes to loc. 0 of user init 179 * code just copied out. 180 */ 181 return; 182 } 183 proc[0].p_szpt = 1; 184 sched(); 185 } 186 187 /* 188 * Initialize hash links for buffers. 189 */ 190 bhinit() 191 { 192 register int i; 193 register struct bufhd *bp; 194 195 for (bp = bufhash, i = 0; i < BUFHSZ; i++, bp++) 196 bp->b_forw = bp->b_back = (struct buf *)bp; 197 } 198 199 /* 200 * Initialize the buffer I/O system by freeing 201 * all buffers and setting all device buffer lists to empty. 202 */ 203 binit() 204 { 205 register struct buf *bp, *dp; 206 register int i; 207 struct swdevt *swp; 208 int base, residual; 209 210 for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) { 211 dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp; 212 dp->b_flags = B_HEAD; 213 } 214 base = bufpages / nbuf; 215 residual = bufpages % nbuf; 216 for (i = 0; i < nbuf; i++) { 217 bp = &buf[i]; 218 bp->b_dev = NODEV; 219 bp->b_bcount = 0; 220 bp->b_un.b_addr = buffers + i * MAXBSIZE; 221 if (i < residual) 222 bp->b_bufsize = (base + 1) * CLBYTES; 223 else 224 bp->b_bufsize = base * CLBYTES; 225 binshash(bp, &bfreelist[BQ_AGE]); 226 bp->b_flags = B_BUSY|B_INVAL; 227 brelse(bp); 228 } 229 /* 230 * Count swap devices, and adjust total swap space available. 231 * Some of this space will not be available until a vswapon() 232 * system is issued, usually when the system goes multi-user. 233 */ 234 nswdev = 0; 235 nswap = 0; 236 for (swp = swdevt; swp->sw_dev; swp++) { 237 nswdev++; 238 if (swp->sw_nblks > nswap) 239 nswap = swp->sw_nblks; 240 } 241 if (nswdev == 0) 242 panic("binit"); 243 if (nswdev > 1) 244 nswap = ((nswap + dmmax - 1) / dmmax) * dmmax; 245 nswap *= nswdev; 246 maxpgio *= nswdev; 247 swfree(0); 248 } 249 250 /* 251 * Initialize linked list of free swap 252 * headers. These do not actually point 253 * to buffers, but rather to pages that 254 * are being swapped in and out. 255 */ 256 bswinit() 257 { 258 register int i; 259 register struct buf *sp = swbuf; 260 261 bswlist.av_forw = sp; 262 for (i=0; i<nswbuf-1; i++, sp++) 263 sp->av_forw = sp+1; 264 sp->av_forw = NULL; 265 } 266 267 /* 268 * Initialize clist by freeing all character blocks, then count 269 * number of character devices. (Once-only routine) 270 */ 271 cinit() 272 { 273 register int ccp; 274 register struct cblock *cp; 275 276 ccp = (int)cfree; 277 ccp = (ccp+CROUND) & ~CROUND; 278 for(cp=(struct cblock *)ccp; cp < &cfree[nclist-1]; cp++) { 279 cp->c_next = cfreelist; 280 cfreelist = cp; 281 cfreecount += CBSIZE; 282 } 283 } 284