Berkeley copyright

[unix-history] / usr / src / sys / kern / init_main.c

diff --git a/usr/src/sys/kern/init_main.c b/usr/src/sys/kern/init_main.c
index e04bb34..286ff79 100644 (file)
--- a/usr/src/sys/kern/init_main.c
+++ b/usr/src/sys/kern/init_main.c
@@ -1,26 +1,38 @@
-/*     init_main.c     4.17    81/08/13        */
+/*
+ * Copyright (c) 1982, 1986 Regents of the University of California.
+ * All rights reserved.  The Berkeley software License Agreement
+ * specifies the terms and conditions for redistribution.
+ *
+ *     @(#)init_main.c 7.7 (Berkeley) %G%
+ */

 
 

-#include "../h/param.h"
-#include "../h/systm.h"
-#include "../h/dir.h"
-#include "../h/user.h"
-#include "../h/filsys.h"
-#include "../h/mount.h"
-#include "../h/map.h"
-#include "../h/proc.h"
-#include "../h/inode.h"
-#include "../h/seg.h"
-#include "../h/conf.h"
-#include "../h/buf.h"
-#include "../h/mtpr.h"
-#include "../h/pte.h"
-#include "../h/clock.h"
-#include "../h/vm.h"
-#include "../h/cmap.h"
-#include "../h/text.h"
-#include "../h/vlimit.h"
-#include "../h/clist.h"
+#include "../machine/pte.h"

 
 

+#include "param.h"
+#include "systm.h"
+#include "dir.h"
+#include "user.h"
+#include "kernel.h"
+#include "fs.h"
+#include "mount.h"
+#include "map.h"
+#include "proc.h"
+#include "inode.h"
+#include "seg.h"
+#include "conf.h"
+#include "buf.h"
+#include "vm.h"
+#include "cmap.h"
+#include "text.h"
+#include "clist.h"
+#include "malloc.h"
+#include "protosw.h"
+#include "quota.h"
+#include "reboot.h"
+#include "../machine/reg.h"
+#include "../machine/cpu.h"
+
+int    cmask = CMASK;

 /*
  * Initialization code.
  * Called from cold start routine as
 /*
  * Initialization code.
  * Called from cold start routine as


@@ -32,25 +44,27 @@
  *     hand craft 0th process
  *     call all initialization routines
  *     fork - process 0 to schedule
  *     hand craft 0th process
  *     call all initialization routines
  *     fork - process 0 to schedule

- *          - process 2 to page out

  *          - process 1 execute bootstrap
  *          - process 1 execute bootstrap

- *
- * loop at loc 13 (0xd) in user mode -- /etc/init
- *     cannot be executed.
+ *          - process 2 to page out

  */
 main(firstaddr)
  */
 main(firstaddr)

+       int firstaddr;

 {
        register int i;
        register struct proc *p;
 {
        register int i;
        register struct proc *p;

+       register struct pgrp *pg;
+       struct fs *fs;
+       int s;

 
        rqinit();
 
        rqinit();

+#include "loop.h"

        startup(firstaddr);
 
        /*
         * set up system process 0 (swapper)
         */
        p = &proc[0];
        startup(firstaddr);
 
        /*
         * set up system process 0 (swapper)
         */
        p = &proc[0];

-       p->p_p0br = (struct pte *)mfpr(P0BR);
+       p->p_p0br = u.u_pcb.pcb_p0br;

        p->p_szpt = 1;
        p->p_addr = uaddr(p);
        p->p_stat = SRUN;
        p->p_szpt = 1;
        p->p_addr = uaddr(p);
        p->p_stat = SRUN;


@@ -58,127 +72,155 @@ main(firstaddr)
        p->p_nice = NZERO;
        setredzone(p->p_addr, (caddr_t)&u);
        u.u_procp = p;
        p->p_nice = NZERO;
        setredzone(p->p_addr, (caddr_t)&u);
        u.u_procp = p;

-       u.u_cmask = CMASK;
-       for (i = 1; i < sizeof(u.u_limit)/sizeof(u.u_limit[0]); i++)
-               switch (i) {
-
-               case LIM_STACK:
-                       u.u_limit[i] = 512*1024;
-                       continue;
-               case LIM_DATA:
-                       u.u_limit[i] = ctob(MAXDSIZ);
-                       continue;
-               default:
-                       u.u_limit[i] = INFINITY;
-                       continue;
-               }
-       p->p_maxrss = INFINITY/NBPG;
-       clkstart();
+       MALLOC(pgrphash[0], struct pgrp *, sizeof (struct pgrp), 
+               M_PGRP, M_NOWAIT);
+       if ((pg = pgrphash[0]) == NULL)
+               panic("no space to craft zero'th process group");
+       pg->pg_id = 0;
+       pg->pg_hforw = 0;
+       pg->pg_mem = p;
+       pg->pg_jobc = 0;
+       p->p_pgrp = pg;
+       p->p_pgrpnxt = 0;
+       MALLOC(pg->pg_session, struct session *, sizeof (struct session),
+               M_SESSION, M_NOWAIT);
+       if (pg->pg_session == NULL)
+               panic("no space to craft zero'th session");
+       pg->pg_session->s_count = 1;
+       pg->pg_session->s_leader = 0;
+       /*
+        * These assume that the u. area is always mapped 
+        * to the same virtual address. Otherwise must be
+        * handled when copying the u. area in newproc().
+        */
+       u.u_nd.ni_iov = &u.u_nd.ni_iovec;
+       u.u_ap = u.u_arg;
+       u.u_nd.ni_iovcnt = 1;

 
 

+       u.u_cmask = cmask;
+       u.u_lastfile = -1;
+       for (i = 1; i < NGROUPS; i++)
+               u.u_groups[i] = NOGROUP;
+       for (i = 0; i < sizeof(u.u_rlimit)/sizeof(u.u_rlimit[0]); i++)
+               u.u_rlimit[i].rlim_cur = u.u_rlimit[i].rlim_max = 
+                   RLIM_INFINITY;

        /*
        /*

-        * Initialize devices and
-        * set up 'known' i-nodes
+        * configure virtual memory system,
+        * set vm rlimits

         */
         */

+       vminit();

 
 

-       ihinit();
-       bhinit();
+#if defined(QUOTA)
+       qtinit();
+       p->p_quota = u.u_quota = getquota(0, 0, Q_NDQ);
+#endif
+       startrtclock();
+#if defined(vax)
+#include "kg.h"
+#if NKG > 0
+       startkgclock();
+#endif
+#endif
+
+       /*
+        * Initialize tables, protocols, and set up well-known inodes.
+        */
+       mbinit();

        cinit();
        cinit();

-       binit();
-       bswinit();
-       iinit();
-       ptinit();
-       rootdir = iget(rootdev, (ino_t)ROOTINO);
-       rootdir->i_flag &= ~ILOCK;
-       u.u_cdir = iget(rootdev, (ino_t)ROOTINO);
-       u.u_cdir->i_flag &= ~ILOCK;
+#include "sl.h"
+#if NSL > 0
+       slattach();                     /* XXX */
+#endif
+#if NLOOP > 0
+       loattach();                     /* XXX */
+#endif
+       /*
+        * Block reception of incoming packets
+        * until protocols have been initialized.
+        */
+       s = splimp();
+       ifinit();
+       domaininit();
+       splx(s);
+       pqinit();
+       xinit();
+       ihinit();
+       swapinit();
+       nchinit();
+#ifdef GPROF
+       kmstartup();
+#endif
+
+       fs = mountfs(rootdev, boothowto & RB_RDONLY, (struct inode *)0);
+       if (fs == 0)
+               panic("iinit");
+       bcopy("/", fs->fs_fsmnt, 2);
+
+       inittodr(fs->fs_time);
+       boottime = time;
+
+/* kick off timeout driven events by calling first time */
+       roundrobin();
+       schedcpu();
+       schedpaging();
+
+/* set up the root file system */
+       rootdir = iget(rootdev, fs, (ino_t)ROOTINO);
+       iunlock(rootdir);
+       u.u_cdir = iget(rootdev, fs, (ino_t)ROOTINO);
+       iunlock(u.u_cdir);

        u.u_rdir = NULL;
        u.u_rdir = NULL;

+

        u.u_dmap = zdmap;
        u.u_smap = zdmap;
 
        u.u_dmap = zdmap;
        u.u_smap = zdmap;
 

+       enablertclock();                /* enable realtime clock interrupts */

        /*
        /*

-        * Set the scan rate and other parameters of the paging subsystem.
+        * make init process

         */
         */

-       setupclock();

 
 

+       proc[0].p_szpt = CLSIZE;
+       if (newproc(0)) {
+               expand(clrnd((int)btoc(szicode)), 0);
+               (void) swpexpand(u.u_dsize, (size_t)0, &u.u_dmap, &u.u_smap);
+               (void) copyout((caddr_t)icode, (caddr_t)0, (unsigned)szicode);
+               /*
+                * Return goes to loc. 0 of user init
+                * code just copied out.
+                */
+               return;
+       }

        /*
         * make page-out daemon (process 2)
         * the daemon has ctopt(nswbuf*CLSIZE*KLMAX) pages of page
         * table so that it can map dirty pages into
         * its address space during asychronous pushes.
         */
        /*
         * make page-out daemon (process 2)
         * the daemon has ctopt(nswbuf*CLSIZE*KLMAX) pages of page
         * table so that it can map dirty pages into
         * its address space during asychronous pushes.
         */

-       mpid = 1;

        proc[0].p_szpt = clrnd(ctopt(nswbuf*CLSIZE*KLMAX + UPAGES));
        proc[0].p_szpt = clrnd(ctopt(nswbuf*CLSIZE*KLMAX + UPAGES));

-       proc[1].p_stat = SZOMB;         /* force it to be in proc slot 2 */

        if (newproc(0)) {
                proc[2].p_flag |= SLOAD|SSYS;
                proc[2].p_dsize = u.u_dsize = nswbuf*CLSIZE*KLMAX; 
                pageout();
        if (newproc(0)) {
                proc[2].p_flag |= SLOAD|SSYS;
                proc[2].p_dsize = u.u_dsize = nswbuf*CLSIZE*KLMAX; 
                pageout();

+               /*NOTREACHED*/

        }
 
        /*
        }
 
        /*

-        * make init process and

         * enter scheduling loop
         */
         * enter scheduling loop
         */

-
-       mpid = 0;
-       proc[1].p_stat = 0;
-       proc[0].p_szpt = CLSIZE;
-       if (newproc(0)) {
-               expand(clrnd((int)btoc(szicode)), P0BR);
-               (void) swpexpand(u.u_dsize, 0, &u.u_dmap, &u.u_smap);
-               (void) copyout((caddr_t)icode, (caddr_t)0, (unsigned)szicode);
-               /*
-                * Return goes to loc. 0 of user init
-                * code just copied out.
-                */
-               return;
-       }
-
-#ifdef BBNNET 
-       /*
-        * Initialize bbn network.
-        */
-       netinit();
-#endif BBNNET

        proc[0].p_szpt = 1;
        sched();
 }
 
 /*
        proc[0].p_szpt = 1;
        sched();
 }
 
 /*

- * iinit is called once (from main)
- * very early in initialization.
- * It reads the root's super block
- * and initializes the current date
- * from the last modified date.
- *
- * panic: iinit -- cannot read the super
- * block. Usually because of an IO error.
+ * Initialize hash links for buffers.

  */
  */

-iinit()
+bhinit()

 {
 {

-       register struct buf *bp;
-       register struct filsys *fp;

        register int i;
        register int i;

+       register struct bufhd *bp;

 
 

-       (*bdevsw[major(rootdev)].d_open)(rootdev, 1);
-       bp = bread(rootdev, SUPERB);
-       if(u.u_error)
-               panic("iinit");
-       bp->b_flags |= B_LOCKED;                /* block can never be re-used */
-       brelse(bp);
-       mount[0].m_dev = rootdev;
-       mount[0].m_bufp = bp;
-       fp = bp->b_un.b_filsys;
-       fp->s_flock = 0;
-       fp->s_ilock = 0;
-       fp->s_ronly = 0;
-       fp->s_lasti = 1;
-       fp->s_nbehind = 0;
-       fp->s_fsmnt[0] = '/';
-       for (i = 1; i < sizeof(fp->s_fsmnt); i++)
-               fp->s_fsmnt[i] = 0;
-       clkinit(fp->s_time);
-       bootime = time;
+       for (bp = bufhash, i = 0; i < BUFHSZ; i++, bp++)
+               bp->b_forw = bp->b_back = (struct buf *)bp;

 }
 
 /*
 }
 
 /*


@@ -187,58 +229,76 @@ iinit()
  */
 binit()
 {
  */
 binit()
 {

-       register struct buf *bp;
-       register struct buf *dp;
+       register struct buf *bp, *dp;

        register int i;
        register int i;

-       struct bdevsw *bdp;
-       struct swdevt *swp;
+       int base, residual;

 
        for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) {
                dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp;
                dp->b_flags = B_HEAD;
        }
 
        for (dp = bfreelist; dp < &bfreelist[BQUEUES]; dp++) {
                dp->b_forw = dp->b_back = dp->av_forw = dp->av_back = dp;
                dp->b_flags = B_HEAD;
        }

-       dp--;                           /* dp = &bfreelist[BQUEUES-1]; */
-       for (i=0; i<nbuf; i++) {
+       base = bufpages / nbuf;
+       residual = bufpages % nbuf;
+       for (i = 0; i < nbuf; i++) {

                bp = &buf[i];
                bp->b_dev = NODEV;
                bp = &buf[i];
                bp->b_dev = NODEV;

-               bp->b_un.b_addr = buffers + i * BSIZE;
-               bp->b_back = dp;
-               bp->b_forw = dp->b_forw;
-               dp->b_forw->b_back = bp;
-               dp->b_forw = bp;
+               bp->b_bcount = 0;
+               bp->b_un.b_addr = buffers + i * MAXBSIZE;
+               if (i < residual)
+                       bp->b_bufsize = (base + 1) * CLBYTES;
+               else
+                       bp->b_bufsize = base * CLBYTES;
+               binshash(bp, &bfreelist[BQ_AGE]);

                bp->b_flags = B_BUSY|B_INVAL;
                brelse(bp);
        }
                bp->b_flags = B_BUSY|B_INVAL;
                brelse(bp);
        }

-       for (bdp = bdevsw; bdp->d_open; bdp++)
-               nblkdev++;
-       /*
-        * Count swap devices, and adjust total swap space available.
-        * Some of this space will not be available until a vswapon()
-        * system is issued, usually when the system goes multi-user.
-        */
-       nswdev = 0;
-       for (swp = swdevt; swp->sw_dev; swp++)
-               nswdev++;
-       if (nswdev == 0)
-               panic("binit");
-       if (nswdev > 1)
-               nswap = (nswap/DMMAX)*DMMAX;
-       nswap *= nswdev;
-       maxpgio *= nswdev;
-       swfree(0);

 }
 
 /*
 }
 
 /*

+ * Set up swap devices.

  * Initialize linked list of free swap
  * headers. These do not actually point
  * to buffers, but rather to pages that
  * are being swapped in and out.
  */
  * Initialize linked list of free swap
  * headers. These do not actually point
  * to buffers, but rather to pages that
  * are being swapped in and out.
  */

-bswinit()
+swapinit()

 {
        register int i;
        register struct buf *sp = swbuf;
 {
        register int i;
        register struct buf *sp = swbuf;

+       struct swdevt *swp;
+       int error;
+
+       /*
+        * Count swap devices, and adjust total swap space available.
+        * Some of this space will not be available until a swapon()
+        * system is issued, usually when the system goes multi-user.
+        */
+       nswdev = 0;
+       nswap = 0;
+       for (swp = swdevt; swp->sw_dev; swp++) {
+               nswdev++;
+               if (swp->sw_nblks > nswap)
+                       nswap = swp->sw_nblks;
+       }
+       if (nswdev == 0)
+               panic("swapinit");
+       if (nswdev > 1)
+               nswap = ((nswap + dmmax - 1) / dmmax) * dmmax;
+       nswap *= nswdev;
+       /*
+        * If there are multiple swap areas,
+        * allow more paging operations per second.
+        */
+       if (nswdev > 1)
+               maxpgio = (maxpgio * (2 * nswdev - 1)) / 2;
+       if (error = swfree(0)) {
+               printf("swfree errno %d\n", error);     /* XXX */
+               panic("swapinit swfree 0");
+       }

 
 

+       /*
+        * Now set up swap buffer headers.
+        */

        bswlist.av_forw = sp;
        for (i=0; i<nswbuf-1; i++, sp++)
                sp->av_forw = sp+1;
        bswlist.av_forw = sp;
        for (i=0; i<nswbuf-1; i++, sp++)
                sp->av_forw = sp+1;


@@ -253,7 +313,6 @@ cinit()
 {
        register int ccp;
        register struct cblock *cp;
 {
        register int ccp;
        register struct cblock *cp;

-       register struct cdevsw *cdp;

 
        ccp = (int)cfree;
        ccp = (ccp+CROUND) & ~CROUND;
 
        ccp = (int)cfree;
        ccp = (ccp+CROUND) & ~CROUND;


@@ -262,8 +321,4 @@ cinit()
                cfreelist = cp;
                cfreecount += CBSIZE;
        }
                cfreelist = cp;
                cfreecount += CBSIZE;
        }

-       ccp = 0;
-       for(cdp = cdevsw; cdp->d_open; cdp++)
-               ccp++;
-       nchrdev = ccp;

 }
 }