File: [local] / sys / kern / init_main.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:14:52 2008 UTC (16 years, 4 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
|
/* $OpenBSD: init_main.c,v 1.143 2007/07/25 23:11:52 art Exp $ */
/* $NetBSD: init_main.c,v 1.84.4.1 1996/06/02 09:08:06 mrg Exp $ */
/*
* Copyright (c) 1995 Christopher G. Demetriou. All rights reserved.
* Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* 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. 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 8.9 (Berkeley) 1/21/94
*/
#include <sys/param.h>
#include <sys/filedesc.h>
#include <sys/file.h>
#include <sys/errno.h>
#include <sys/exec.h>
#include <sys/kernel.h>
#include <sys/kthread.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <sys/resourcevar.h>
#include <sys/signalvar.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/vnode.h>
#include <sys/tty.h>
#include <sys/conf.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/socketvar.h>
#include <sys/lockf.h>
#include <sys/protosw.h>
#include <sys/reboot.h>
#include <sys/user.h>
#ifdef SYSVSHM
#include <sys/shm.h>
#endif
#ifdef SYSVSEM
#include <sys/sem.h>
#endif
#ifdef SYSVMSG
#include <sys/msg.h>
#endif
#include <sys/domain.h>
#include <sys/mbuf.h>
#include <sys/pipe.h>
#include <sys/workq.h>
#include <sys/syscall.h>
#include <sys/syscallargs.h>
#include <dev/rndvar.h>
#include <ufs/ufs/quota.h>
#include <machine/cpu.h>
#include <uvm/uvm.h>
#include <net/if.h>
#include <net/raw_cb.h>
#if defined(CRYPTO)
#include <crypto/cryptodev.h>
#include <crypto/cryptosoft.h>
#endif
#if defined(NFSSERVER) || defined(NFSCLIENT)
extern void nfs_init(void);
#endif
#include "softraid.h"
const char copyright[] =
"Copyright (c) 1982, 1986, 1989, 1991, 1993\n"
"\tThe Regents of the University of California. All rights reserved.\n"
"Copyright (c) 1995-2007 OpenBSD. All rights reserved. http://www.OpenBSD.org\n";
/* Components of the first process -- never freed. */
struct session session0;
struct pgrp pgrp0;
struct proc proc0;
struct process process0;
struct pcred cred0;
struct plimit limit0;
struct vmspace vmspace0;
struct sigacts sigacts0;
struct proc *initproc;
int cmask = CMASK;
extern struct user *proc0paddr;
struct vnode *rootvp, *swapdev_vp;
int boothowto;
struct timeval boottime;
int ncpus = 1;
__volatile int start_init_exec; /* semaphore for start_init() */
#if !defined(NO_PROPOLICE)
long __guard[8];
#endif
/* XXX return int so gcc -Werror won't complain */
int main(void *);
void check_console(struct proc *);
void start_init(void *);
void start_cleaner(void *);
void start_update(void *);
void start_reaper(void *);
void start_crypto(void *);
void init_exec(void);
void kqueue_init(void);
void workq_init(void);
extern char sigcode[], esigcode[];
#ifdef SYSCALL_DEBUG
extern char *syscallnames[];
#endif
struct emul emul_native = {
"native",
NULL,
sendsig,
SYS_syscall,
SYS_MAXSYSCALL,
sysent,
#ifdef SYSCALL_DEBUG
syscallnames,
#else
NULL,
#endif
0,
copyargs,
setregs,
NULL,
sigcode,
esigcode,
EMUL_ENABLED | EMUL_NATIVE,
};
/*
* 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.
*/
/* XXX return int, so gcc -Werror won't complain */
int
main(void *framep)
{
struct proc *p;
struct pdevinit *pdev;
struct timeval rtv;
quad_t lim;
int s, i;
extern struct pdevinit pdevinit[];
extern void scheduler_start(void);
extern void disk_init(void);
extern void endtsleep(void *);
extern void realitexpire(void *);
/*
* Initialize the current process pointer (curproc) before
* any possible traps/probes to simplify trap processing.
*/
curproc = p = &proc0;
p->p_cpu = curcpu();
/*
* Initialize timeouts.
*/
timeout_startup();
/*
* Attempt to find console and initialize
* in case of early panic or other messages.
*/
config_init(); /* init autoconfiguration data structures */
consinit();
printf("%s\n", copyright);
KERNEL_LOCK_INIT();
uvm_init();
disk_init(); /* must come before autoconfiguration */
tty_init(); /* initialise tty's */
cpu_startup();
/*
* Initialize mbuf's. Do this now because we might attempt to
* allocate mbufs or mbuf clusters during autoconfiguration.
*/
mbinit();
/* Initialize sockets. */
soinit();
/*
* Initialize process and pgrp structures.
*/
procinit();
/* Initialize file locking. */
lf_init();
/*
* Initialize filedescriptors.
*/
filedesc_init();
/*
* Initialize pipes.
*/
pipe_init();
/*
* Initialize kqueues.
*/
kqueue_init();
/*
* Create process 0 (the swapper).
*/
process0.ps_mainproc = p;
TAILQ_INIT(&process0.ps_threads);
TAILQ_INSERT_TAIL(&process0.ps_threads, p, p_thr_link);
p->p_p = &process0;
LIST_INSERT_HEAD(&allproc, p, p_list);
p->p_pgrp = &pgrp0;
LIST_INSERT_HEAD(PIDHASH(0), p, p_hash);
LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash);
LIST_INIT(&pgrp0.pg_members);
LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist);
pgrp0.pg_session = &session0;
session0.s_count = 1;
session0.s_leader = p;
atomic_setbits_int(&p->p_flag, P_SYSTEM | P_NOCLDWAIT);
p->p_stat = SONPROC;
p->p_nice = NZERO;
p->p_emul = &emul_native;
bcopy("swapper", p->p_comm, sizeof ("swapper"));
/* Init timeouts. */
timeout_set(&p->p_sleep_to, endtsleep, p);
timeout_set(&p->p_realit_to, realitexpire, p);
/* Create credentials. */
cred0.p_refcnt = 1;
p->p_cred = &cred0;
p->p_ucred = crget();
p->p_ucred->cr_ngroups = 1; /* group 0 */
/* Initialize signal state for process 0. */
signal_init();
p->p_sigacts = &sigacts0;
siginit(p);
/* Create the file descriptor table. */
p->p_fd = fdinit(NULL);
/* Create the limits structures. */
p->p_p->ps_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_NOFILE].rlim_max = MIN(NOFILE_MAX,
(maxfiles - NOFILE > NOFILE) ? maxfiles - NOFILE : NOFILE);
limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC;
lim = ptoa(uvmexp.free);
limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim;
limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim;
limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3;
limit0.p_refcnt = 1;
/* Allocate a prototype map so we have something to fork. */
uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS),
trunc_page(VM_MAX_ADDRESS), TRUE);
p->p_vmspace = &vmspace0;
p->p_addr = proc0paddr; /* XXX */
/*
* We continue to place resource usage info in the
* user struct so they're pageable.
*/
p->p_stats = &p->p_addr->u_stats;
/*
* Charge root for one process.
*/
(void)chgproccnt(0, 1);
/* Initialize run queues */
rqinit();
/* Initialize work queues */
workq_init();
/* Configure the devices */
cpu_configure();
/* Configure virtual memory system, set vm rlimits. */
uvm_init_limits(p);
/* Initialize the file systems. */
#if defined(NFSSERVER) || defined(NFSCLIENT)
nfs_init(); /* initialize server/shared data */
#endif
vfsinit();
/* Start real time and statistics clocks. */
initclocks();
/* Lock the kernel on behalf of proc0. */
KERNEL_PROC_LOCK(p);
#ifdef SYSVSHM
/* Initialize System V style shared memory. */
shminit();
#endif
#ifdef SYSVSEM
/* Initialize System V style semaphores. */
seminit();
#endif
#ifdef SYSVMSG
/* Initialize System V style message queues. */
msginit();
#endif
/* Attach pseudo-devices. */
randomattach();
for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++)
if (pdev->pdev_count > 0)
(*pdev->pdev_attach)(pdev->pdev_count);
#ifdef CRYPTO
swcr_init();
#endif /* CRYPTO */
/*
* Initialize protocols. Block reception of incoming packets
* until everything is ready.
*/
s = splnet();
ifinit();
domaininit();
if_attachdomain();
splx(s);
#ifdef GPROF
/* Initialize kernel profiling. */
kmstartup();
#endif
#if !defined(NO_PROPOLICE)
{
volatile long newguard[8];
int i;
arc4random_bytes((long *)newguard, sizeof(newguard));
for (i = sizeof(__guard)/sizeof(__guard[0]) - 1; i; i--)
__guard[i] = newguard[i];
}
#endif
/* init exec and emul */
init_exec();
/* Start the scheduler */
scheduler_start();
/*
* Create process 1 (init(8)). We do this now, as Unix has
* historically had init be process 1, and changing this would
* probably upset a lot of people.
*
* Note that process 1 won't immediately exec init(8), but will
* wait for us to inform it that the root file system has been
* mounted.
*/
if (fork1(p, SIGCHLD, FORK_FORK, NULL, 0, start_init, NULL, NULL,
&initproc))
panic("fork init");
/*
* Create any kernel threads whose creation was deferred because
* initproc had not yet been created.
*/
kthread_run_deferred_queue();
/*
* Now that device driver threads have been created, wait for
* them to finish any deferred autoconfiguration. Note we don't
* need to lock this semaphore, since we haven't booted any
* secondary processors, yet.
*/
while (config_pending)
(void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0);
dostartuphooks();
#if NSOFTRAID > 0
config_rootfound("softraid", NULL);
#endif
/* Configure root/swap devices */
diskconf();
/* Mount the root file system. */
if (vfs_mountroot())
panic("cannot mount root");
CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS;
/* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */
if (VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode))
panic("cannot find root vnode");
p->p_fd->fd_cdir = rootvnode;
VREF(p->p_fd->fd_cdir);
VOP_UNLOCK(rootvnode, 0, p);
p->p_fd->fd_rdir = NULL;
/*
* Now that root is mounted, we can fixup initproc's CWD
* info. All other processes are kthreads, which merely
* share proc0's CWD info.
*/
initproc->p_fd->fd_cdir = rootvnode;
VREF(initproc->p_fd->fd_cdir);
initproc->p_fd->fd_rdir = NULL;
/*
* 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 mi_switch() after the time got set.
*/
#ifdef __HAVE_TIMECOUNTER
microtime(&boottime);
#else
boottime = mono_time = time;
#endif
LIST_FOREACH(p, &allproc, p_list) {
p->p_stats->p_start = boottime;
microuptime(&p->p_cpu->ci_schedstate.spc_runtime);
p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0;
}
uvm_swap_init();
/* Create the pageout daemon kernel thread. */
if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon"))
panic("fork pagedaemon");
/* Create the reaper daemon kernel thread. */
if (kthread_create(start_reaper, NULL, NULL, "reaper"))
panic("fork reaper");
/* Create the cleaner daemon kernel thread. */
if (kthread_create(start_cleaner, NULL, NULL, "cleaner"))
panic("fork cleaner");
/* Create the update daemon kernel thread. */
if (kthread_create(start_update, NULL, NULL, "update"))
panic("fork update");
/* Create the aiodone daemon kernel thread. */
if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned"))
panic("fork aiodoned");
#ifdef CRYPTO
/* Create the crypto kernel thread. */
if (kthread_create(start_crypto, NULL, NULL, "crypto"))
panic("crypto thread");
#endif /* CRYPTO */
microtime(&rtv);
srandom((u_long)(rtv.tv_sec ^ rtv.tv_usec));
randompid = 1;
#if defined(MULTIPROCESSOR)
/* Boot the secondary processors. */
cpu_boot_secondary_processors();
#endif
domountroothooks();
/*
* Okay, now we can let init(8) exec! It's off to userland!
*/
start_init_exec = 1;
wakeup((void *)&start_init_exec);
/* The scheduler is an infinite loop. */
uvm_scheduler();
/* NOTREACHED */
}
/*
* List of paths to try when searching for "init".
*/
static char *initpaths[] = {
"/sbin/init",
"/sbin/oinit",
"/sbin/init.bak",
NULL,
};
void
check_console(struct proc *p)
{
struct nameidata nd;
int error;
NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p);
error = namei(&nd);
if (error) {
if (error == ENOENT)
printf("warning: /dev/console does not exist\n");
else
printf("warning: /dev/console error %d\n", error);
} else
vrele(nd.ni_vp);
}
/*
* Start the initial user process; try exec'ing each pathname in "initpaths".
* The program is invoked with one argument containing the boot flags.
*/
void
start_init(void *arg)
{
struct proc *p = arg;
vaddr_t addr;
struct sys_execve_args /* {
syscallarg(const char *) path;
syscallarg(char *const *) argp;
syscallarg(char *const *) envp;
} */ args;
int options, error;
long i;
register_t retval[2];
char flags[4], *flagsp;
char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL;
/*
* Now in process 1.
*/
/*
* Wait for main() to tell us that it's safe to exec.
*/
while (start_init_exec == 0)
(void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0);
check_console(p);
/*
* Need just enough stack to hold the faked-up "execve()" arguments.
*/
#ifdef MACHINE_STACK_GROWS_UP
addr = USRSTACK;
#else
addr = USRSTACK - PAGE_SIZE;
#endif
if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE,
NULL, UVM_UNKNOWN_OFFSET, 0,
UVM_MAPFLAG(UVM_PROT_RW, UVM_PROT_ALL, UVM_INH_COPY,
UVM_ADV_NORMAL, UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)))
panic("init: couldn't allocate argument space");
p->p_vmspace->vm_maxsaddr = (caddr_t)addr;
for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) {
#ifdef MACHINE_STACK_GROWS_UP
ucp = (char *)addr;
#else
ucp = (char *)(addr + PAGE_SIZE);
#endif
/*
* Construct the boot flag argument.
*/
flagsp = flags;
*flagsp++ = '-';
options = 0;
if (boothowto & RB_SINGLE) {
*flagsp++ = 's';
options = 1;
}
#ifdef notyet
if (boothowto & RB_FASTBOOT) {
*flagsp++ = 'f';
options = 1;
}
#endif
/*
* Move out the flags (arg 1), if necessary.
*/
if (options != 0) {
*flagsp++ = '\0';
i = flagsp - flags;
#ifdef DEBUG
printf("init: copying out flags `%s' %d\n", flags, i);
#endif
#ifdef MACHINE_STACK_GROWS_UP
arg1 = ucp;
(void)copyout((caddr_t)flags, (caddr_t)ucp, i);
ucp += i;
#else
(void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i);
arg1 = ucp;
#endif
}
/*
* Move out the file name (also arg 0).
*/
i = strlen(path) + 1;
#ifdef DEBUG
printf("init: copying out path `%s' %d\n", path, i);
#endif
#ifdef MACHINE_STACK_GROWS_UP
arg0 = ucp;
(void)copyout((caddr_t)path, (caddr_t)ucp, i);
ucp += i;
ucp = (caddr_t)ALIGN((u_long)ucp);
uap = (char **)ucp + 3;
#else
(void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i);
arg0 = ucp;
uap = (char **)((u_long)ucp & ~ALIGNBYTES);
#endif
/*
* Move out the arg pointers.
*/
i = 0;
copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */
if (options != 0)
copyout(&arg1, (caddr_t)--uap, sizeof(register_t));
copyout(&arg0, (caddr_t)--uap, sizeof(register_t));
/*
* Point at the arguments.
*/
SCARG(&args, path) = arg0;
SCARG(&args, argp) = uap;
SCARG(&args, envp) = NULL;
/*
* Now try to exec the program. If can't for any reason
* other than it doesn't exist, complain.
*/
if ((error = sys_execve(p, &args, retval)) == 0) {
KERNEL_PROC_UNLOCK(p);
return;
}
if (error != ENOENT)
printf("exec %s: error %d\n", path, error);
}
printf("init: not found\n");
panic("no init");
}
void
start_update(void *arg)
{
sched_sync(curproc);
/* NOTREACHED */
}
void
start_cleaner(void *arg)
{
buf_daemon(curproc);
/* NOTREACHED */
}
void
start_reaper(void *arg)
{
reaper();
/* NOTREACHED */
}
#ifdef CRYPTO
void
start_crypto(void *arg)
{
crypto_thread();
/* NOTREACHED */
}
#endif /* CRYPTO */