diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c index ef682f488463..9b7804b1bde9 100644 --- a/sys/kern/kern_synch.c +++ b/sys/kern/kern_synch.c @@ -1,550 +1,538 @@ /*- * Copyright (c) 1982, 1986, 1990, 1991, 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. * 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. * * @(#)kern_synch.c 8.9 (Berkeley) 5/19/95 */ #include __FBSDID("$FreeBSD$"); #include "opt_ktrace.h" #include "opt_sched.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef KTRACE #include #include #endif #include static void synch_setup(void *dummy); SYSINIT(synch_setup, SI_SUB_KICK_SCHEDULER, SI_ORDER_FIRST, synch_setup, NULL); int hogticks; -int lbolt; static int pause_wchan; static struct callout loadav_callout; -static struct callout lbolt_callout; struct loadavg averunnable = { {0, 0, 0}, FSCALE }; /* load average, of runnable procs */ /* * Constants for averages over 1, 5, and 15 minutes * when sampling at 5 second intervals. */ static fixpt_t cexp[3] = { 0.9200444146293232 * FSCALE, /* exp(-1/12) */ 0.9834714538216174 * FSCALE, /* exp(-1/60) */ 0.9944598480048967 * FSCALE, /* exp(-1/180) */ }; /* kernel uses `FSCALE', userland (SHOULD) use kern.fscale */ static int fscale __unused = FSCALE; SYSCTL_INT(_kern, OID_AUTO, fscale, CTLFLAG_RD, 0, FSCALE, ""); static void loadav(void *arg); -static void lboltcb(void *arg); void sleepinit(void) { hogticks = (hz / 10) * 2; /* Default only. */ init_sleepqueues(); } /* * General sleep call. Suspends the current thread until a wakeup is * performed on the specified identifier. The thread will then be made * runnable with the specified priority. Sleeps at most timo/hz seconds * (0 means no timeout). If pri includes PCATCH flag, signals are checked * before and after sleeping, else signals are not checked. Returns 0 if * awakened, EWOULDBLOCK if the timeout expires. If PCATCH is set and a * signal needs to be delivered, ERESTART is returned if the current system * call should be restarted if possible, and EINTR is returned if the system * call should be interrupted by the signal (return EINTR). * * The lock argument is unlocked before the caller is suspended, and * re-locked before _sleep() returns. If priority includes the PDROP * flag the lock is not re-locked before returning. */ int _sleep(void *ident, struct lock_object *lock, int priority, const char *wmesg, int timo) { struct thread *td; struct proc *p; struct lock_class *class; int catch, flags, lock_state, pri, rval; WITNESS_SAVE_DECL(lock_witness); td = curthread; p = td->td_proc; #ifdef KTRACE if (KTRPOINT(td, KTR_CSW)) ktrcsw(1, 0); #endif WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, lock, "Sleeping on \"%s\"", wmesg); - KASSERT(timo != 0 || mtx_owned(&Giant) || lock != NULL || - ident == &lbolt, ("sleeping without a lock")); + KASSERT(timo != 0 || mtx_owned(&Giant) || lock != NULL, + ("sleeping without a lock")); KASSERT(p != NULL, ("msleep1")); KASSERT(ident != NULL && TD_IS_RUNNING(td), ("msleep")); if (priority & PDROP) KASSERT(lock != NULL && lock != &Giant.lock_object, ("PDROP requires a non-Giant lock")); if (lock != NULL) class = LOCK_CLASS(lock); else class = NULL; if (cold) { /* * During autoconfiguration, just return; * don't run any other threads or panic below, * in case this is the idle thread and already asleep. * XXX: this used to do "s = splhigh(); splx(safepri); * splx(s);" to give interrupts a chance, but there is * no way to give interrupts a chance now. */ if (lock != NULL && priority & PDROP) class->lc_unlock(lock); return (0); } catch = priority & PCATCH; pri = priority & PRIMASK; rval = 0; /* * If we are already on a sleep queue, then remove us from that * sleep queue first. We have to do this to handle recursive * sleeps. */ if (TD_ON_SLEEPQ(td)) sleepq_remove(td, td->td_wchan); if (ident == &pause_wchan) flags = SLEEPQ_PAUSE; else flags = SLEEPQ_SLEEP; if (catch) flags |= SLEEPQ_INTERRUPTIBLE; sleepq_lock(ident); CTR5(KTR_PROC, "sleep: thread %ld (pid %ld, %s) on %s (%p)", td->td_tid, p->p_pid, td->td_name, wmesg, ident); DROP_GIANT(); if (lock != NULL && lock != &Giant.lock_object && !(class->lc_flags & LC_SLEEPABLE)) { WITNESS_SAVE(lock, lock_witness); lock_state = class->lc_unlock(lock); } else /* GCC needs to follow the Yellow Brick Road */ lock_state = -1; /* * We put ourselves on the sleep queue and start our timeout * before calling thread_suspend_check, as we could stop there, * and a wakeup or a SIGCONT (or both) could occur while we were * stopped without resuming us. Thus, we must be ready for sleep * when cursig() is called. If the wakeup happens while we're * stopped, then td will no longer be on a sleep queue upon * return from cursig(). */ - sleepq_add(ident, ident == &lbolt ? NULL : lock, wmesg, flags, 0); + sleepq_add(ident, lock, wmesg, flags, 0); if (timo) sleepq_set_timeout(ident, timo); if (lock != NULL && class->lc_flags & LC_SLEEPABLE) { sleepq_release(ident); WITNESS_SAVE(lock, lock_witness); lock_state = class->lc_unlock(lock); sleepq_lock(ident); } if (timo && catch) rval = sleepq_timedwait_sig(ident, pri); else if (timo) rval = sleepq_timedwait(ident, pri); else if (catch) rval = sleepq_wait_sig(ident, pri); else { sleepq_wait(ident, pri); rval = 0; } #ifdef KTRACE if (KTRPOINT(td, KTR_CSW)) ktrcsw(0, 0); #endif PICKUP_GIANT(); if (lock != NULL && lock != &Giant.lock_object && !(priority & PDROP)) { class->lc_lock(lock, lock_state); WITNESS_RESTORE(lock, lock_witness); } return (rval); } int msleep_spin(void *ident, struct mtx *mtx, const char *wmesg, int timo) { struct thread *td; struct proc *p; int rval; WITNESS_SAVE_DECL(mtx); td = curthread; p = td->td_proc; KASSERT(mtx != NULL, ("sleeping without a mutex")); KASSERT(p != NULL, ("msleep1")); KASSERT(ident != NULL && TD_IS_RUNNING(td), ("msleep")); if (cold) { /* * During autoconfiguration, just return; * don't run any other threads or panic below, * in case this is the idle thread and already asleep. * XXX: this used to do "s = splhigh(); splx(safepri); * splx(s);" to give interrupts a chance, but there is * no way to give interrupts a chance now. */ return (0); } sleepq_lock(ident); CTR5(KTR_PROC, "msleep_spin: thread %ld (pid %ld, %s) on %s (%p)", td->td_tid, p->p_pid, td->td_name, wmesg, ident); DROP_GIANT(); mtx_assert(mtx, MA_OWNED | MA_NOTRECURSED); WITNESS_SAVE(&mtx->lock_object, mtx); mtx_unlock_spin(mtx); /* * We put ourselves on the sleep queue and start our timeout. */ sleepq_add(ident, &mtx->lock_object, wmesg, SLEEPQ_SLEEP, 0); if (timo) sleepq_set_timeout(ident, timo); /* * Can't call ktrace with any spin locks held so it can lock the * ktrace_mtx lock, and WITNESS_WARN considers it an error to hold * any spin lock. Thus, we have to drop the sleepq spin lock while * we handle those requests. This is safe since we have placed our * thread on the sleep queue already. */ #ifdef KTRACE if (KTRPOINT(td, KTR_CSW)) { sleepq_release(ident); ktrcsw(1, 0); sleepq_lock(ident); } #endif #ifdef WITNESS sleepq_release(ident); WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, "Sleeping on \"%s\"", wmesg); sleepq_lock(ident); #endif if (timo) rval = sleepq_timedwait(ident, 0); else { sleepq_wait(ident, 0); rval = 0; } #ifdef KTRACE if (KTRPOINT(td, KTR_CSW)) ktrcsw(0, 0); #endif PICKUP_GIANT(); mtx_lock_spin(mtx); WITNESS_RESTORE(&mtx->lock_object, mtx); return (rval); } /* * pause() is like tsleep() except that the intention is to not be * explicitly woken up by another thread. Instead, the current thread * simply wishes to sleep until the timeout expires. It is * implemented using a dummy wait channel. */ int pause(const char *wmesg, int timo) { KASSERT(timo != 0, ("pause: timeout required")); return (tsleep(&pause_wchan, 0, wmesg, timo)); } /* * Make all threads sleeping on the specified identifier runnable. */ void wakeup(void *ident) { int wakeup_swapper; sleepq_lock(ident); wakeup_swapper = sleepq_broadcast(ident, SLEEPQ_SLEEP, 0, 0); sleepq_release(ident); if (wakeup_swapper) kick_proc0(); } /* * Make a thread sleeping on the specified identifier runnable. * May wake more than one thread if a target thread is currently * swapped out. */ void wakeup_one(void *ident) { int wakeup_swapper; sleepq_lock(ident); wakeup_swapper = sleepq_signal(ident, SLEEPQ_SLEEP, 0, 0); sleepq_release(ident); if (wakeup_swapper) kick_proc0(); } static void kdb_switch(void) { thread_unlock(curthread); kdb_backtrace(); kdb_reenter(); panic("%s: did not reenter debugger", __func__); } /* * The machine independent parts of context switching. */ void mi_switch(int flags, struct thread *newtd) { uint64_t runtime, new_switchtime; struct thread *td; struct proc *p; td = curthread; /* XXX */ THREAD_LOCK_ASSERT(td, MA_OWNED | MA_NOTRECURSED); p = td->td_proc; /* XXX */ KASSERT(!TD_ON_RUNQ(td), ("mi_switch: called by old code")); #ifdef INVARIANTS if (!TD_ON_LOCK(td) && !TD_IS_RUNNING(td)) mtx_assert(&Giant, MA_NOTOWNED); #endif KASSERT(td->td_critnest == 1 || (td->td_critnest == 2 && (td->td_owepreempt) && (flags & SW_INVOL) != 0 && newtd == NULL) || panicstr, ("mi_switch: switch in a critical section")); KASSERT((flags & (SW_INVOL | SW_VOL)) != 0, ("mi_switch: switch must be voluntary or involuntary")); KASSERT(newtd != curthread, ("mi_switch: preempting back to ourself")); /* * Don't perform context switches from the debugger. */ if (kdb_active) kdb_switch(); if (flags & SW_VOL) td->td_ru.ru_nvcsw++; else td->td_ru.ru_nivcsw++; #ifdef SCHED_STATS SCHED_STAT_INC(sched_switch_stats[flags & SW_TYPE_MASK]); #endif /* * Compute the amount of time during which the current * thread was running, and add that to its total so far. */ new_switchtime = cpu_ticks(); runtime = new_switchtime - PCPU_GET(switchtime); td->td_runtime += runtime; td->td_incruntime += runtime; PCPU_SET(switchtime, new_switchtime); td->td_generation++; /* bump preempt-detect counter */ PCPU_INC(cnt.v_swtch); PCPU_SET(switchticks, ticks); CTR4(KTR_PROC, "mi_switch: old thread %ld (td_sched %p, pid %ld, %s)", td->td_tid, td->td_sched, p->p_pid, td->td_name); #if (KTR_COMPILE & KTR_SCHED) != 0 if (TD_IS_IDLETHREAD(td)) CTR3(KTR_SCHED, "mi_switch: %p(%s) prio %d idle", td, td->td_name, td->td_priority); else if (newtd != NULL) CTR5(KTR_SCHED, "mi_switch: %p(%s) prio %d preempted by %p(%s)", td, td->td_name, td->td_priority, newtd, newtd->td_name); else CTR6(KTR_SCHED, "mi_switch: %p(%s) prio %d inhibit %d wmesg %s lock %s", td, td->td_name, td->td_priority, td->td_inhibitors, td->td_wmesg, td->td_lockname); #endif sched_switch(td, newtd, flags); CTR3(KTR_SCHED, "mi_switch: running %p(%s) prio %d", td, td->td_name, td->td_priority); CTR4(KTR_PROC, "mi_switch: new thread %ld (td_sched %p, pid %ld, %s)", td->td_tid, td->td_sched, p->p_pid, td->td_name); /* * If the last thread was exiting, finish cleaning it up. */ if ((td = PCPU_GET(deadthread))) { PCPU_SET(deadthread, NULL); thread_stash(td); } } /* * Change thread state to be runnable, placing it on the run queue if * it is in memory. If it is swapped out, return true so our caller * will know to awaken the swapper. */ int setrunnable(struct thread *td) { THREAD_LOCK_ASSERT(td, MA_OWNED); KASSERT(td->td_proc->p_state != PRS_ZOMBIE, ("setrunnable: pid %d is a zombie", td->td_proc->p_pid)); switch (td->td_state) { case TDS_RUNNING: case TDS_RUNQ: return (0); case TDS_INHIBITED: /* * If we are only inhibited because we are swapped out * then arange to swap in this process. Otherwise just return. */ if (td->td_inhibitors != TDI_SWAPPED) return (0); /* FALLTHROUGH */ case TDS_CAN_RUN: break; default: printf("state is 0x%x", td->td_state); panic("setrunnable(2)"); } if ((td->td_flags & TDF_INMEM) == 0) { if ((td->td_flags & TDF_SWAPINREQ) == 0) { td->td_flags |= TDF_SWAPINREQ; return (1); } } else sched_wakeup(td); return (0); } /* * Compute a tenex style load average of a quantity on * 1, 5 and 15 minute intervals. */ static void loadav(void *arg) { int i, nrun; struct loadavg *avg; nrun = sched_load(); avg = &averunnable; for (i = 0; i < 3; i++) avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; /* * Schedule the next update to occur after 5 seconds, but add a * random variation to avoid synchronisation with processes that * run at regular intervals. */ callout_reset(&loadav_callout, hz * 4 + (int)(random() % (hz * 2 + 1)), loadav, NULL); } -static void -lboltcb(void *arg) -{ - wakeup(&lbolt); - callout_reset(&lbolt_callout, hz, lboltcb, NULL); -} - /* ARGSUSED */ static void synch_setup(void *dummy) { callout_init(&loadav_callout, CALLOUT_MPSAFE); - callout_init(&lbolt_callout, CALLOUT_MPSAFE); /* Kick off timeout driven events by calling first time. */ loadav(NULL); - lboltcb(NULL); } /* * General purpose yield system call. */ int yield(struct thread *td, struct yield_args *uap) { thread_lock(td); sched_prio(td, PRI_MAX_TIMESHARE); mi_switch(SW_VOL | SWT_RELINQUISH, NULL); thread_unlock(td); td->td_retval[0] = 0; return (0); } diff --git a/sys/sys/kernel.h b/sys/sys/kernel.h index e491c6e9466d..d224733193b1 100644 --- a/sys/sys/kernel.h +++ b/sys/sys/kernel.h @@ -1,379 +1,378 @@ /*- * Copyright (c) 1995 Terrence R. Lambert * All rights reserved. * * Copyright (c) 1990, 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. 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. * * @(#)kernel.h 8.3 (Berkeley) 1/21/94 * $FreeBSD$ */ #ifndef _SYS_KERNEL_H_ #define _SYS_KERNEL_H_ #include #ifdef _KERNEL /* for intrhook below */ #include /* Global variables for the kernel. */ /* 1.1 */ extern struct mtx hostname_mtx; extern unsigned long hostid; extern char hostuuid[64]; extern char hostname[MAXHOSTNAMELEN]; extern char domainname[MAXHOSTNAMELEN]; extern char kernelname[MAXPATHLEN]; extern int tick; /* usec per tick (1000000 / hz) */ extern int hz; /* system clock's frequency */ extern int psratio; /* ratio: prof / stat */ extern int stathz; /* statistics clock's frequency */ extern int profhz; /* profiling clock's frequency */ extern int profprocs; /* number of process's profiling */ extern int ticks; -extern int lbolt; /* once a second sleep address */ #endif /* _KERNEL */ /* * Enumerated types for known system startup interfaces. * * Startup occurs in ascending numeric order; the list entries are * sorted prior to attempting startup to guarantee order. Items * of the same level are arbitrated for order based on the 'order' * element. * * These numbers are arbitrary and are chosen ONLY for ordering; the * enumeration values are explicit rather than implicit to provide * for binary compatibility with inserted elements. * * The SI_SUB_RUN_SCHEDULER value must have the highest lexical value. * * The SI_SUB_SWAP values represent a value used by * the BSD 4.4Lite but not by FreeBSD; it is maintained in dependent * order to support porting. * * The SI_SUB_PROTO_BEGIN and SI_SUB_PROTO_END bracket a range of * initializations to take place at splimp(). This is a historical * wart that should be removed -- probably running everything at * splimp() until the first init that doesn't want it is the correct * fix. They are currently present to ensure historical behavior. */ enum sysinit_sub_id { SI_SUB_DUMMY = 0x0000000, /* not executed; for linker*/ SI_SUB_DONE = 0x0000001, /* processed*/ SI_SUB_TUNABLES = 0x0700000, /* establish tunable values */ SI_SUB_COPYRIGHT = 0x0800001, /* first use of console*/ SI_SUB_SETTINGS = 0x0880000, /* check and recheck settings */ SI_SUB_MTX_POOL_STATIC = 0x0900000, /* static mutex pool */ SI_SUB_LOCKMGR = 0x0980000, /* lockmgr locks */ SI_SUB_VM = 0x1000000, /* virtual memory system init*/ SI_SUB_KMEM = 0x1800000, /* kernel memory*/ SI_SUB_KVM_RSRC = 0x1A00000, /* kvm operational limits*/ SI_SUB_WITNESS = 0x1A80000, /* witness initialization */ SI_SUB_MTX_POOL_DYNAMIC = 0x1AC0000, /* dynamic mutex pool */ SI_SUB_LOCK = 0x1B00000, /* various locks */ SI_SUB_EVENTHANDLER = 0x1C00000, /* eventhandler init */ SI_SUB_KLD = 0x2000000, /* KLD and module setup */ SI_SUB_CPU = 0x2100000, /* CPU resource(s)*/ SI_SUB_KDTRACE = 0x2140000, /* Kernel dtrace hooks */ SI_SUB_MAC = 0x2180000, /* TrustedBSD MAC subsystem */ SI_SUB_MAC_POLICY = 0x21C0000, /* TrustedBSD MAC policies */ SI_SUB_MAC_LATE = 0x21D0000, /* TrustedBSD MAC subsystem */ SI_SUB_INTRINSIC = 0x2200000, /* proc 0*/ SI_SUB_VM_CONF = 0x2300000, /* config VM, set limits*/ SI_SUB_DDB_SERVICES = 0x2380000, /* capture, scripting, etc. */ SI_SUB_RUN_QUEUE = 0x2400000, /* set up run queue*/ SI_SUB_KTRACE = 0x2480000, /* ktrace */ SI_SUB_OPENSOLARIS = 0x2490000, /* OpenSolaris compatibility */ SI_SUB_CYCLIC = 0x24A0000, /* Cyclic timers */ SI_SUB_AUDIT = 0x24C0000, /* audit */ SI_SUB_CREATE_INIT = 0x2500000, /* create init process*/ SI_SUB_SCHED_IDLE = 0x2600000, /* required idle procs */ SI_SUB_MBUF = 0x2700000, /* mbuf subsystem */ SI_SUB_INTR = 0x2800000, /* interrupt threads */ SI_SUB_SOFTINTR = 0x2800001, /* start soft interrupt thread */ SI_SUB_ACL = 0x2900000, /* start for filesystem ACLs */ SI_SUB_DEVFS = 0x2F00000, /* devfs ready for devices */ SI_SUB_INIT_IF = 0x3000000, /* prep for net interfaces */ SI_SUB_NETGRAPH = 0x3010000, /* Let Netgraph initialize */ SI_SUB_DTRACE = 0x3020000, /* DTrace subsystem */ SI_SUB_DTRACE_PROVIDER = 0x3048000, /* DTrace providers */ SI_SUB_DTRACE_ANON = 0x308C000, /* DTrace anon enabling */ SI_SUB_DRIVERS = 0x3100000, /* Let Drivers initialize */ SI_SUB_CONFIGURE = 0x3800000, /* Configure devices */ SI_SUB_VFS = 0x4000000, /* virtual filesystem*/ SI_SUB_CLOCKS = 0x4800000, /* real time and stat clocks*/ SI_SUB_CLIST = 0x5800000, /* clists*/ SI_SUB_SYSV_SHM = 0x6400000, /* System V shared memory*/ SI_SUB_SYSV_SEM = 0x6800000, /* System V semaphores*/ SI_SUB_SYSV_MSG = 0x6C00000, /* System V message queues*/ SI_SUB_P1003_1B = 0x6E00000, /* P1003.1B realtime */ SI_SUB_PSEUDO = 0x7000000, /* pseudo devices*/ SI_SUB_EXEC = 0x7400000, /* execve() handlers */ SI_SUB_PROTO_BEGIN = 0x8000000, /* XXX: set splimp (kludge)*/ SI_SUB_PROTO_IF = 0x8400000, /* interfaces*/ SI_SUB_PROTO_DOMAIN = 0x8800000, /* domains (address families?)*/ SI_SUB_PROTO_IFATTACHDOMAIN = 0x8800001, /* domain dependent data init*/ SI_SUB_PROTO_END = 0x8ffffff, /* XXX: set splx (kludge)*/ SI_SUB_KPROF = 0x9000000, /* kernel profiling*/ SI_SUB_KICK_SCHEDULER = 0xa000000, /* start the timeout events*/ SI_SUB_INT_CONFIG_HOOKS = 0xa800000, /* Interrupts enabled config */ SI_SUB_ROOT_CONF = 0xb000000, /* Find root devices */ SI_SUB_DUMP_CONF = 0xb200000, /* Find dump devices */ SI_SUB_RAID = 0xb380000, /* Configure GEOM classes */ SI_SUB_SWAP = 0xc000000, /* swap */ SI_SUB_INTRINSIC_POST = 0xd000000, /* proc 0 cleanup*/ SI_SUB_SYSCALLS = 0xd800000, /* register system calls */ SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/ SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/ SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/ SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon*/ SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/ SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/ SI_SUB_SMP = 0xf000000, /* start the APs*/ SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler*/ }; /* * Some enumerated orders; "ANY" sorts last. */ enum sysinit_elem_order { SI_ORDER_FIRST = 0x0000000, /* first*/ SI_ORDER_SECOND = 0x0000001, /* second*/ SI_ORDER_THIRD = 0x0000002, /* third*/ SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */ SI_ORDER_ANY = 0xfffffff /* last*/ }; /* * A system initialization call instance * * At the moment there is one instance of sysinit. We probably do not * want two which is why this code is if'd out, but we definitely want * to discern SYSINIT's which take non-constant data pointers and * SYSINIT's which take constant data pointers, * * The C_* macros take functions expecting const void * arguments * while the non-C_* macros take functions expecting just void * arguments. * * With -Wcast-qual on, the compiler issues warnings: * - if we pass non-const data or functions taking non-const data * to a C_* macro. * * - if we pass const data to the normal macros * * However, no warning is issued if we pass a function taking const data * through a normal non-const macro. This is ok because the function is * saying it won't modify the data so we don't care whether the data is * modifiable or not. */ typedef void (*sysinit_nfunc_t)(void *); typedef void (*sysinit_cfunc_t)(const void *); struct sysinit { enum sysinit_sub_id subsystem; /* subsystem identifier*/ enum sysinit_elem_order order; /* init order within subsystem*/ sysinit_cfunc_t func; /* function */ const void *udata; /* multiplexer/argument */ }; /* * Default: no special processing * * The C_ version of SYSINIT is for data pointers to const * data ( and functions taking data pointers to const data ). * At the moment it is no different from SYSINIT and thus * still results in warnings. * * The casts are necessary to have the compiler produce the * correct warnings when -Wcast-qual is used. * */ #define C_SYSINIT(uniquifier, subsystem, order, func, ident) \ static struct sysinit uniquifier ## _sys_init = { \ subsystem, \ order, \ func, \ (ident) \ }; \ DATA_SET(sysinit_set,uniquifier ## _sys_init) #define SYSINIT(uniquifier, subsystem, order, func, ident) \ C_SYSINIT(uniquifier, subsystem, order, \ (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)(ident)) /* * Called on module unload: no special processing */ #define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \ static struct sysinit uniquifier ## _sys_uninit = { \ subsystem, \ order, \ func, \ (ident) \ }; \ DATA_SET(sysuninit_set,uniquifier ## _sys_uninit) #define SYSUNINIT(uniquifier, subsystem, order, func, ident) \ C_SYSUNINIT(uniquifier, subsystem, order, \ (sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)(ident)) void sysinit_add(struct sysinit **set, struct sysinit **set_end); /* * Infrastructure for tunable 'constants'. Value may be specified at compile * time or kernel load time. Rules relating tunables together can be placed * in a SYSINIT function at SI_SUB_TUNABLES with SI_ORDER_LAST. * * WARNING: developers should never use the reserved suffixes specified in * loader.conf(5) for any tunables or conflicts will result. */ /* * int * please avoid using for new tunables! */ extern void tunable_int_init(void *); struct tunable_int { const char *path; int *var; }; #define TUNABLE_INT(path, var) \ static struct tunable_int __CONCAT(__tunable_int_, __LINE__) = { \ (path), \ (var), \ }; \ SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_int_init, \ &__CONCAT(__tunable_int_, __LINE__)) #define TUNABLE_INT_FETCH(path, var) getenv_int((path), (var)) /* * long */ extern void tunable_long_init(void *); struct tunable_long { const char *path; long *var; }; #define TUNABLE_LONG(path, var) \ static struct tunable_long __CONCAT(__tunable_long_, __LINE__) = { \ (path), \ (var), \ }; \ SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_long_init,\ &__CONCAT(__tunable_long_, __LINE__)) #define TUNABLE_LONG_FETCH(path, var) getenv_long((path), (var)) /* * unsigned long */ extern void tunable_ulong_init(void *); struct tunable_ulong { const char *path; unsigned long *var; }; #define TUNABLE_ULONG(path, var) \ static struct tunable_ulong __CONCAT(__tunable_ulong_, __LINE__) = { \ (path), \ (var), \ }; \ SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_ulong_init, \ &__CONCAT(__tunable_ulong_, __LINE__)) #define TUNABLE_ULONG_FETCH(path, var) getenv_ulong((path), (var)) /* * quad */ extern void tunable_quad_init(void *); struct tunable_quad { const char *path; quad_t *var; }; #define TUNABLE_QUAD(path, var) \ static struct tunable_quad __CONCAT(__tunable_quad_, __LINE__) = { \ (path), \ (var), \ }; \ SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_quad_init, \ &__CONCAT(__tunable_quad_, __LINE__)) #define TUNABLE_QUAD_FETCH(path, var) getenv_quad((path), (var)) extern void tunable_str_init(void *); struct tunable_str { const char *path; char *var; int size; }; #define TUNABLE_STR(path, var, size) \ static struct tunable_str __CONCAT(__tunable_str_, __LINE__) = { \ (path), \ (var), \ (size), \ }; \ SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \ SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_str_init, \ &__CONCAT(__tunable_str_, __LINE__)) #define TUNABLE_STR_FETCH(path, var, size) \ getenv_string((path), (var), (size)) struct intr_config_hook { TAILQ_ENTRY(intr_config_hook) ich_links; void (*ich_func)(void *arg); void *ich_arg; }; int config_intrhook_establish(struct intr_config_hook *hook); void config_intrhook_disestablish(struct intr_config_hook *hook); #endif /* !_SYS_KERNEL_H_*/