/* * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)init_main.c 8.1 (Berkeley) 6/10/93 */ #include <sys/param.h> #include <sys/filedesc.h> #include <sys/kernel.h> #include <sys/mount.h> #include <sys/map.h> #include <sys/proc.h> #include <sys/resourcevar.h> #include <sys/signalvar.h> #include <sys/systm.h> #include <sys/vnode.h> #include <sys/conf.h> #include <sys/buf.h> #include <sys/clist.h> #include <sys/device.h> #include <sys/protosw.h> #include <sys/reboot.h> #include <sys/user.h> #include <ufs/ufs/quota.h> #include <machine/cpu.h> #include <vm/vm.h> #ifdef HPFPLIB char copyright[] = "Copyright (c) 1982, 1986, 1989, 1991, 1993\n\tThe Regents of the University of California.\nCopyright (c) 1992 Hewlett-Packard Company\nCopyright (c) 1992 Motorola Inc.\nAll rights reserved.\n\n"; #else char copyright[] = "Copyright (c) 1982, 1986, 1989, 1991, 1993\n\tThe Regents of the University of California. All rights reserved.\n\n"; #endif /* * Components of process 0; * never freed. */ struct session session0; struct pgrp pgrp0; struct proc proc0; struct pcred cred0; struct filedesc0 filedesc0; struct plimit limit0; struct vmspace vmspace0; struct proc *curproc = &proc0; struct proc *initproc, *pageproc; int cmask = CMASK; extern struct user *proc0paddr; extern int (*mountroot)(); struct vnode *rootvp, *swapdev_vp; int boothowto; struct timeval boottime; struct timeval runtime; /* * System startup; initialize the world, create process 0, * mount root filesystem, and fork to create init and pagedaemon. * Most of the hard work is done in the lower-level initialization * routines including startup(), which does memory initialization * and autoconfiguration. */ main() { register int i; register struct proc *p; register struct filedesc0 *fdp; register struct pdevinit *pdev; int s, rval[2]; extern struct pdevinit pdevinit[]; extern void roundrobin __P((void *)); extern void schedcpu __P((void *)); /* * Initialize curproc before any possible traps/probes * to simplify trap processing. */ p = &proc0; curproc = p; /* * Attempt to find console and initialize * in case of early panic or other messages. */ consinit(); printf(copyright); vm_mem_init(); kmeminit(); cpu_startup(); /* * set up system process 0 (swapper) */ p = &proc0; curproc = p; allproc = (volatile struct proc *)p; p->p_prev = (struct proc **)&allproc; p->p_pgrp = &pgrp0; pgrphash[0] = &pgrp0; pgrp0.pg_mem = p; pgrp0.pg_session = &session0; session0.s_count = 1; session0.s_leader = p; p->p_flag = SLOAD|SSYS; p->p_stat = SRUN; p->p_nice = NZERO; bcopy("swapper", p->p_comm, sizeof ("swapper")); /* * Setup credentials */ cred0.p_refcnt = 1; p->p_cred = &cred0; p->p_ucred = crget(); p->p_ucred->cr_ngroups = 1; /* group 0 */ /* * Create the file descriptor table for process 0. */ fdp = &filedesc0; p->p_fd = &fdp->fd_fd; fdp->fd_fd.fd_refcnt = 1; fdp->fd_fd.fd_cmask = cmask; fdp->fd_fd.fd_ofiles = fdp->fd_dfiles; fdp->fd_fd.fd_ofileflags = fdp->fd_dfileflags; fdp->fd_fd.fd_nfiles = NDFILE; /* * Set initial limits */ p->p_limit = &limit0; for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++) limit0.pl_rlimit[i].rlim_cur = limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE; limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC; i = ptoa(cnt.v_free_count); limit0.pl_rlimit[RLIMIT_RSS].rlim_max = i; limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = i; limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = i / 3; limit0.p_refcnt = 1; /* * Allocate a prototype map so we have something to fork */ p->p_vmspace = &vmspace0; vmspace0.vm_refcnt = 1; pmap_pinit(&vmspace0.vm_pmap); vm_map_init(&p->p_vmspace->vm_map, round_page(VM_MIN_ADDRESS), trunc_page(VM_MAX_ADDRESS), TRUE); vmspace0.vm_map.pmap = &vmspace0.vm_pmap; p->p_addr = proc0paddr; /* XXX */ /* * We continue to place resource usage info * and signal actions in the user struct so they're pageable. */ p->p_stats = &p->p_addr->u_stats; p->p_sigacts = &p->p_addr->u_sigacts; /* * Initialize per uid information structure and charge * root for one process. */ usrinfoinit(); (void)chgproccnt(0, 1); rqinit(); /* Configure virtual memory system, set vm rlimits. */ vm_init_limits(p); /* Initialize the file systems. */ vfsinit(); /* Start real time and statistics clocks. */ initclocks(); /* Initialize tables. */ mbinit(); cinit(); #ifdef SYSVSHM shminit(); #endif /* Attach pseudo-devices. */ for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) (*pdev->pdev_attach)(pdev->pdev_count); /* * Initialize protocols. Block reception of incoming packets * until everything is ready. */ s = splimp(); ifinit(); domaininit(); splx(s); #ifdef GPROF kmstartup(); #endif /* kick off timeout driven events by calling first time */ roundrobin(NULL); schedcpu(NULL); /* * Set up the root file system and vnode. */ if ((*mountroot)()) panic("cannot mount root"); /* * Get vnode for '/'. * Setup rootdir and fdp->fd_fd.fd_cdir to point to it. */ if (VFS_ROOT(rootfs, &rootdir)) panic("cannot find root vnode"); fdp->fd_fd.fd_cdir = rootdir; VREF(fdp->fd_fd.fd_cdir); VOP_UNLOCK(rootdir); fdp->fd_fd.fd_rdir = NULL; swapinit(); /* * Now can look at time, having had a chance to verify the time * from the file system. Reset p->p_rtime as it may have been * munched in swtch() after the time got set. */ p->p_stats->p_start = runtime = mono_time = boottime = time; p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; /* * make init process */ siginit(p); if (fork(p, NULL, rval)) panic("fork init"); if (rval[1]) { extern int icode[]; /* user init code */ extern int szicode; /* size of icode */ static char initflags[] = "-sf"; vm_offset_t addr; char *ip; /* * Now in process 1. Set init flags into icode, get a minimal * address space, copy out "icode", and return to it to do an * exec of init. */ ip = initflags + 1; if (boothowto&RB_SINGLE) *ip++ = 's'; #ifdef notyet if (boothowto&RB_FASTBOOT) *ip++ = 'f'; #endif if (ip == initflags + 1) *ip++ = '-'; *ip++ = '\0'; addr = VM_MIN_ADDRESS; initproc = p = curproc; if (vm_allocate(&p->p_vmspace->vm_map, &addr, round_page(szicode + sizeof(initflags)), FALSE) != 0 || addr != VM_MIN_ADDRESS) panic("init: couldn't allocate at zero"); /* need just enough stack to exec from */ addr = trunc_page(USRSTACK - PAGE_SIZE); if (vm_allocate(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, FALSE) != KERN_SUCCESS) panic("vm_allocate init stack"); p->p_vmspace->vm_maxsaddr = (caddr_t)addr; (void)copyout((caddr_t)icode, (caddr_t)VM_MIN_ADDRESS, (u_int)szicode); (void)copyout(initflags, (caddr_t)(VM_MIN_ADDRESS + szicode), sizeof(initflags)); return; /* returns to icode */ } /* * Start up pageout daemon (process 2). */ if (fork(p, NULL, rval)) panic("fork pager"); if (rval[1]) { /* * Now in process 2. */ p = curproc; pageproc = p; p->p_flag |= SLOAD|SSYS; /* XXX */ bcopy("pagedaemon", curproc->p_comm, sizeof ("pagedaemon")); vm_pageout(); /*NOTREACHED*/ } /* * enter scheduling loop */ sched(); }