Commit | Line | Data |
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21c39d9c | 1 | /* init_main.c 4.40 82/10/17 */ |
c4708522 BJ |
2 | |
3 | #include "../h/param.h" | |
4 | #include "../h/systm.h" | |
5 | #include "../h/dir.h" | |
6 | #include "../h/user.h" | |
d3003a84 | 7 | #include "../h/kernel.h" |
6459ebe0 | 8 | #include "../h/fs.h" |
c4708522 BJ |
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" | |
c4708522 | 16 | #include "../h/pte.h" |
c4708522 BJ |
17 | #include "../h/vm.h" |
18 | #include "../h/cmap.h" | |
831e498e | 19 | #include "../h/text.h" |
0a34b6fd | 20 | #include "../h/clist.h" |
d872f034 | 21 | #ifdef INET |
d872f034 BJ |
22 | #include "../h/protosw.h" |
23 | #endif | |
859bd1be | 24 | #include "../h/quota.h" |
c4708522 | 25 | |
206ecc72 | 26 | extern struct user u; /* have to declare it somewhere! */ |
c4708522 BJ |
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 13 (0xd) in user mode -- /etc/init | |
42 | * cannot be executed. | |
43 | */ | |
44 | main(firstaddr) | |
45 | { | |
73248996 | 46 | register int i; |
dd4b582c | 47 | register struct proc *p; |
9d6d37ce | 48 | struct fs *fs; |
c4708522 | 49 | |
c4708522 | 50 | rqinit(); |
fbf9a431 | 51 | #include "loop.h" |
c4708522 | 52 | startup(firstaddr); |
c4708522 BJ |
53 | |
54 | /* | |
55 | * set up system process 0 (swapper) | |
56 | */ | |
dd4b582c | 57 | p = &proc[0]; |
206ecc72 | 58 | p->p_p0br = u.u_pcb.pcb_p0br; |
dd4b582c BJ |
59 | p->p_szpt = 1; |
60 | p->p_addr = uaddr(p); | |
61 | p->p_stat = SRUN; | |
62 | p->p_flag |= SLOAD|SSYS; | |
63 | p->p_nice = NZERO; | |
64 | setredzone(p->p_addr, (caddr_t)&u); | |
65 | u.u_procp = p; | |
c4708522 | 66 | u.u_cmask = CMASK; |
197da11b BJ |
67 | for (i = 1; i < NGROUPS; i++) |
68 | u.u_groups[i] = -1; | |
d3003a84 BJ |
69 | for (i = 0; i < sizeof(u.u_rlimit)/sizeof(u.u_rlimit[0]); i++) |
70 | u.u_rlimit[i].rlim_cur = u.u_rlimit[i].rlim_max = | |
71 | RLIM_INFINITY; | |
72 | u.u_rlimit[RLIMIT_STACK].rlim_cur = 512*1024; | |
bf9fbb7a BJ |
73 | u.u_rlimit[RLIMIT_STACK].rlim_max = ctob(MAXDSIZ); |
74 | u.u_rlimit[RLIMIT_DATA].rlim_max = | |
75 | u.u_rlimit[RLIMIT_DATA].rlim_cur = ctob(MAXDSIZ); | |
d3003a84 | 76 | p->p_maxrss = RLIM_INFINITY/NBPG; |
859bd1be RE |
77 | #ifdef QUOTA |
78 | qtinit(); | |
79 | p->p_quota = u.u_quota = getquota(0, 0, Q_NDQ); | |
80 | #endif | |
d3003a84 | 81 | clockstart(); |
c4708522 BJ |
82 | |
83 | /* | |
d872f034 | 84 | * Initialize tables, protocols, and set up well-known inodes. |
c4708522 | 85 | */ |
d872f034 | 86 | mbinit(); |
3f660399 | 87 | cinit(); /* needed by dmc-11 driver */ |
d872f034 | 88 | #ifdef INET |
4f4caf05 BJ |
89 | #if NLOOP > 0 |
90 | loattach(); /* XXX */ | |
91 | #endif | |
fbf9a431 | 92 | ifinit(); |
b115f297 | 93 | pfinit(); /* must follow interfaces */ |
d872f034 | 94 | #endif |
c4708522 | 95 | ihinit(); |
0d5a507c | 96 | bhinit(); |
c4708522 BJ |
97 | binit(); |
98 | bswinit(); | |
e6254ffb BJ |
99 | #ifdef GPROF |
100 | kmstartup(); | |
101 | #endif | |
9d6d37ce | 102 | |
55b76399 | 103 | fs = mountfs(rootdev, 0, (struct inode *)0); |
9d6d37ce BJ |
104 | if (fs == 0) |
105 | panic("iinit"); | |
106 | bcopy("/", fs->fs_fsmnt, 2); | |
27b91f59 BJ |
107 | |
108 | /* initialize wall clock */ | |
d3003a84 BJ |
109 | clockinit(fs->fs_time); |
110 | boottime = time; | |
9d6d37ce | 111 | |
27b91f59 BJ |
112 | /* kick off timeout driven events by calling first time */ |
113 | roundrobin(); | |
114 | schedcpu(); | |
115 | schedpaging(); | |
116 | ||
117 | /* set up the root file system */ | |
9d6d37ce BJ |
118 | rootdir = iget(rootdev, fs, (ino_t)ROOTINO); |
119 | iunlock(rootdir); | |
120 | u.u_cdir = iget(rootdev, fs, (ino_t)ROOTINO); | |
121 | iunlock(u.u_cdir); | |
c4708522 | 122 | u.u_rdir = NULL; |
27b91f59 | 123 | |
c4708522 BJ |
124 | u.u_dmap = zdmap; |
125 | u.u_smap = zdmap; | |
126 | ||
c1988f85 BJ |
127 | /* |
128 | * Set the scan rate and other parameters of the paging subsystem. | |
129 | */ | |
130 | setupclock(); | |
131 | ||
c4708522 BJ |
132 | /* |
133 | * make page-out daemon (process 2) | |
c34926db | 134 | * the daemon has ctopt(nswbuf*CLSIZE*KLMAX) pages of page |
c4708522 BJ |
135 | * table so that it can map dirty pages into |
136 | * its address space during asychronous pushes. | |
137 | */ | |
c4708522 | 138 | mpid = 1; |
c34926db | 139 | proc[0].p_szpt = clrnd(ctopt(nswbuf*CLSIZE*KLMAX + UPAGES)); |
c4708522 BJ |
140 | proc[1].p_stat = SZOMB; /* force it to be in proc slot 2 */ |
141 | if (newproc(0)) { | |
142 | proc[2].p_flag |= SLOAD|SSYS; | |
c34926db | 143 | proc[2].p_dsize = u.u_dsize = nswbuf*CLSIZE*KLMAX; |
c4708522 BJ |
144 | pageout(); |
145 | } | |
146 | ||
147 | /* | |
148 | * make init process and | |
149 | * enter scheduling loop | |
150 | */ | |
151 | ||
152 | mpid = 0; | |
153 | proc[1].p_stat = 0; | |
154 | proc[0].p_szpt = CLSIZE; | |
155 | if (newproc(0)) { | |
206ecc72 | 156 | expand(clrnd((int)btoc(szicode)), 0); |
934e4ecf | 157 | (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); |
81263dba | 158 | (void) copyout((caddr_t)icode, (caddr_t)0, (unsigned)szicode); |
c4708522 BJ |
159 | /* |
160 | * Return goes to loc. 0 of user init | |
161 | * code just copied out. | |
162 | */ | |
163 | return; | |
164 | } | |
859bd1be RE |
165 | #ifdef MUSH |
166 | /* | |
167 | * start MUSH daemon | |
168 | * pid == 3 | |
169 | */ | |
170 | if (newproc(0)) { | |
206ecc72 | 171 | expand(clrnd((int)btoc(szmcode)), 0); |
859bd1be RE |
172 | (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap); |
173 | (void) copyout((caddr_t)mcode, (caddr_t)0, (unsigned)szmcode); | |
174 | /* | |
175 | * Return goes to loc. 0 of user mush | |
176 | * code just copied out. | |
177 | */ | |
178 | return; | |
179 | } | |
180 | #endif | |
c4708522 BJ |
181 | proc[0].p_szpt = 1; |
182 | sched(); | |
183 | } | |
184 | ||
94d38c1e KM |
185 | /* |
186 | * Initialize hash links for buffers. | |
187 | */ | |
188 | bhinit() | |
189 | { | |
190 | register int i; | |
191 | register struct bufhd *bp; | |
192 | ||
193 | for (bp = bufhash, i = 0; i < BUFHSZ; i++, bp++) | |
194 | bp->b_forw = bp->b_back = (struct buf *)bp; | |
c4708522 BJ |
195 | } |
196 | ||
c4708522 BJ |
197 | /* |
198 | * Initialize the buffer I/O system by freeing | |
199 | * all buffers and setting all device buffer lists to empty. | |
c4708522 BJ |
200 | */ |
201 | binit() | |
202 | { | |
21c39d9c | 203 | register struct buf *bp, *dp; |
c4708522 | 204 | register int i; |
41888f16 | 205 | struct swdevt *swp; |
c4708522 | 206 | |
63e97a1d BJ |
207 | for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) { |
208 | dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp; | |
209 | dp->b_flags = B_HEAD; | |
210 | } | |
211 | dp--; /* dp = &bfreelist[BQUEUES-1]; */ | |
6459ebe0 | 212 | for (i = 0; i < nbuf; i++) { |
c4708522 BJ |
213 | bp = &buf[i]; |
214 | bp->b_dev = NODEV; | |
6459ebe0 KM |
215 | bp->b_un.b_addr = buffers + i * MAXBSIZE; |
216 | bp->b_bcount = MAXBSIZE; | |
63e97a1d BJ |
217 | bp->b_back = dp; |
218 | bp->b_forw = dp->b_forw; | |
219 | dp->b_forw->b_back = bp; | |
220 | dp->b_forw = bp; | |
221 | bp->b_flags = B_BUSY|B_INVAL; | |
c4708522 BJ |
222 | brelse(bp); |
223 | } | |
41888f16 BJ |
224 | /* |
225 | * Count swap devices, and adjust total swap space available. | |
226 | * Some of this space will not be available until a vswapon() | |
227 | * system is issued, usually when the system goes multi-user. | |
228 | */ | |
229 | nswdev = 0; | |
230 | for (swp = swdevt; swp->sw_dev; swp++) | |
231 | nswdev++; | |
232 | if (nswdev == 0) | |
233 | panic("binit"); | |
b2fdd14d EC |
234 | if (nswdev > 1) |
235 | nswap = (nswap/DMMAX)*DMMAX; | |
41888f16 BJ |
236 | nswap *= nswdev; |
237 | maxpgio *= nswdev; | |
238 | swfree(0); | |
c4708522 BJ |
239 | } |
240 | ||
241 | /* | |
242 | * Initialize linked list of free swap | |
243 | * headers. These do not actually point | |
244 | * to buffers, but rather to pages that | |
245 | * are being swapped in and out. | |
246 | */ | |
247 | bswinit() | |
248 | { | |
249 | register int i; | |
0a34b6fd | 250 | register struct buf *sp = swbuf; |
c4708522 | 251 | |
c34926db | 252 | bswlist.av_forw = sp; |
0a34b6fd | 253 | for (i=0; i<nswbuf-1; i++, sp++) |
c34926db BJ |
254 | sp->av_forw = sp+1; |
255 | sp->av_forw = NULL; | |
c4708522 | 256 | } |
e7c7d88e BJ |
257 | |
258 | /* | |
259 | * Initialize clist by freeing all character blocks, then count | |
260 | * number of character devices. (Once-only routine) | |
261 | */ | |
262 | cinit() | |
263 | { | |
264 | register int ccp; | |
265 | register struct cblock *cp; | |
e7c7d88e BJ |
266 | |
267 | ccp = (int)cfree; | |
268 | ccp = (ccp+CROUND) & ~CROUND; | |
269 | for(cp=(struct cblock *)ccp; cp < &cfree[nclist-1]; cp++) { | |
270 | cp->c_next = cfreelist; | |
271 | cfreelist = cp; | |
272 | cfreecount += CBSIZE; | |
273 | } | |
e7c7d88e | 274 | } |