339 lines
12 KiB
C
339 lines
12 KiB
C
/*-
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* Copyright (c) 1995 Terrence R. Lambert
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* All rights reserved.
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*
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kernel.h 8.3 (Berkeley) 1/21/94
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* $FreeBSD$
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*/
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#ifndef _SYS_KERNEL_H_
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#define _SYS_KERNEL_H_
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#include <sys/linker_set.h>
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#ifdef _KERNEL
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/* for intrhook below */
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#include <sys/queue.h>
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/* THIS MUST DIE! */
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#include <sys/module.h>
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/* Global variables for the kernel. */
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/* 1.1 */
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extern unsigned long hostid;
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extern char hostname[MAXHOSTNAMELEN];
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extern int hostnamelen;
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extern char domainname[MAXHOSTNAMELEN];
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extern int domainnamelen;
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extern char kernelname[MAXPATHLEN];
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/* 1.2 */
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extern struct timeval boottime;
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extern struct timezone tz; /* XXX */
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extern int tick; /* usec per tick (1000000 / hz) */
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extern int hz; /* system clock's frequency */
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extern int psratio; /* ratio: prof / stat */
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extern int stathz; /* statistics clock's frequency */
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extern int profhz; /* profiling clock's frequency */
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extern int ticks;
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extern int lbolt; /* once a second sleep address */
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#endif /* _KERNEL */
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/*
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* Enumerated types for known system startup interfaces.
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*
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* Startup occurs in ascending numeric order; the list entries are
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* sorted prior to attempting startup to guarantee order. Items
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* of the same level are arbitrated for order based on the 'order'
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* element.
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*
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* These numbers are arbitrary and are chosen ONLY for ordering; the
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* enumeration values are explicit rather than implicit to provide
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* for binary compatibility with inserted elements.
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*
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* The SI_SUB_RUN_SCHEDULER value must have the highest lexical value.
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*
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* The SI_SUB_CONSOLE and SI_SUB_SWAP values represent values used by
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* the BSD 4.4Lite but not by FreeBSD; they are maintained in dependent
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* order to support porting.
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*
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* The SI_SUB_PROTO_BEGIN and SI_SUB_PROTO_END bracket a range of
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* initializations to take place at splimp(). This is a historical
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* wart that should be removed -- probably running everything at
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* splimp() until the first init that doesn't want it is the correct
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* fix. They are currently present to ensure historical behavior.
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*/
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enum sysinit_sub_id {
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SI_SUB_DUMMY = 0x0000000, /* not executed; for linker*/
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SI_SUB_DONE = 0x0000001, /* processed*/
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SI_SUB_TUNABLES = 0x0700000, /* establish tunable values */
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SI_SUB_CONSOLE = 0x0800000, /* console*/
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SI_SUB_COPYRIGHT = 0x0800001, /* first use of console*/
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SI_SUB_MTX_POOL = 0x0900000, /* mutex pool */
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SI_SUB_VM = 0x1000000, /* virtual memory system init*/
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SI_SUB_KMEM = 0x1800000, /* kernel memory*/
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SI_SUB_KVM_RSRC = 0x1A00000, /* kvm operational limits*/
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SI_SUB_WITNESS = 0x1A80000, /* witness initialization */
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SI_SUB_LOCK = 0x1B00000, /* lockmgr locks */
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SI_SUB_EVENTHANDLER = 0x1C00000, /* eventhandler init */
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SI_SUB_KLD = 0x2000000, /* KLD and module setup */
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SI_SUB_CPU = 0x2100000, /* CPU resource(s)*/
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SI_SUB_MAC = 0x2180000, /* TrustedBSD MAC subsystem */
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SI_SUB_MAC_POLICY = 0x21C0000, /* TrustedBSD MAC policies */
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SI_SUB_MAC_LATE = 0x21D0000, /* TrustedBSD MAC subsystem */
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SI_SUB_INTRINSIC = 0x2200000, /* proc 0*/
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SI_SUB_VM_CONF = 0x2300000, /* config VM, set limits*/
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SI_SUB_RUN_QUEUE = 0x2400000, /* set up run queue*/
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SI_SUB_KTRACE = 0x2480000, /* ktrace */
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SI_SUB_CREATE_INIT = 0x2500000, /* create init process*/
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SI_SUB_SCHED_IDLE = 0x2600000, /* required idle procs */
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SI_SUB_MBUF = 0x2700000, /* mbuf subsystem */
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SI_SUB_INTR = 0x2800000, /* interrupt threads */
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SI_SUB_SOFTINTR = 0x2800001, /* start soft interrupt thread */
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SI_SUB_DEVFS = 0x2F00000, /* devfs ready for devices */
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SI_SUB_INIT_IF = 0x3000000, /* prep for net interfaces */
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SI_SUB_DRIVERS = 0x3100000, /* Let Drivers initialize */
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SI_SUB_CONFIGURE = 0x3800000, /* Configure devices */
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SI_SUB_VFS = 0x4000000, /* virtual filesystem*/
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SI_SUB_CLOCKS = 0x4800000, /* real time and stat clocks*/
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SI_SUB_CLIST = 0x5800000, /* clists*/
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SI_SUB_SYSV_SHM = 0x6400000, /* System V shared memory*/
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SI_SUB_SYSV_SEM = 0x6800000, /* System V semaphores*/
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SI_SUB_SYSV_MSG = 0x6C00000, /* System V message queues*/
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SI_SUB_P1003_1B = 0x6E00000, /* P1003.1B realtime */
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SI_SUB_PSEUDO = 0x7000000, /* pseudo devices*/
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SI_SUB_EXEC = 0x7400000, /* execve() handlers */
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SI_SUB_PROTO_BEGIN = 0x8000000, /* XXX: set splimp (kludge)*/
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SI_SUB_PROTO_IF = 0x8400000, /* interfaces*/
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SI_SUB_PROTO_DOMAIN = 0x8800000, /* domains (address families?)*/
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SI_SUB_PROTO_END = 0x8ffffff, /* XXX: set splx (kludge)*/
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SI_SUB_KPROF = 0x9000000, /* kernel profiling*/
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SI_SUB_KICK_SCHEDULER = 0xa000000, /* start the timeout events*/
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SI_SUB_INT_CONFIG_HOOKS = 0xa800000, /* Interrupts enabled config */
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SI_SUB_ROOT_CONF = 0xb000000, /* Find root devices */
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SI_SUB_DUMP_CONF = 0xb200000, /* Find dump devices */
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SI_SUB_VINUM = 0xb300000, /* Configure vinum */
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SI_SUB_RAID = 0xb380000, /* Configure RAIDframe */
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SI_SUB_MOUNT_ROOT = 0xb400000, /* root mount*/
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SI_SUB_SWAP = 0xc000000, /* swap*/
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SI_SUB_INTRINSIC_POST = 0xd000000, /* proc 0 cleanup*/
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SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/
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SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/
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SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/
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SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon*/
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SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/
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SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/
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SI_SUB_SMP = 0xf000000, /* start the APs*/
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SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler*/
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};
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/*
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* Some enumerated orders; "ANY" sorts last.
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*/
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enum sysinit_elem_order {
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SI_ORDER_FIRST = 0x0000000, /* first*/
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SI_ORDER_SECOND = 0x0000001, /* second*/
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SI_ORDER_THIRD = 0x0000002, /* third*/
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SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */
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SI_ORDER_ANY = 0xfffffff /* last*/
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};
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/*
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* A system initialization call instance
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*
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* At the moment there is one instance of sysinit. We probably do not
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* want two which is why this code is if'd out, but we definitely want
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* to discern SYSINIT's which take non-constant data pointers and
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* SYSINIT's which take constant data pointers,
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*
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* The C_* macros take functions expecting const void * arguments
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* while the non-C_* macros take functions expecting just void * arguments.
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*
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* With -Wcast-qual on, the compiler issues warnings:
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* - if we pass non-const data or functions taking non-const data
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* to a C_* macro.
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*
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* - if we pass const data to the normal macros
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*
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* However, no warning is issued if we pass a function taking const data
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* through a normal non-const macro. This is ok because the function is
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* saying it won't modify the data so we don't care whether the data is
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* modifiable or not.
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*/
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typedef void (*sysinit_nfunc_t)(void *);
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typedef void (*sysinit_cfunc_t)(const void *);
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struct sysinit {
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enum sysinit_sub_id subsystem; /* subsystem identifier*/
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enum sysinit_elem_order order; /* init order within subsystem*/
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sysinit_cfunc_t func; /* function */
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const void *udata; /* multiplexer/argument */
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};
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/*
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* Default: no special processing
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*
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* The C_ version of SYSINIT is for data pointers to const
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* data ( and functions taking data pointers to const data ).
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* At the moment it is no different from SYSINIT and thus
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* still results in warnings.
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*
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* The casts are necessary to have the compiler produce the
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* correct warnings when -Wcast-qual is used.
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*
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*/
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#define C_SYSINIT(uniquifier, subsystem, order, func, ident) \
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static struct sysinit uniquifier ## _sys_init = { \
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subsystem, \
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order, \
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func, \
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(ident) \
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}; \
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DATA_SET(sysinit_set,uniquifier ## _sys_init);
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#define SYSINIT(uniquifier, subsystem, order, func, ident) \
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C_SYSINIT(uniquifier, subsystem, order, \
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(sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)(ident))
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/*
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* Called on module unload: no special processing
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*/
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#define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \
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static struct sysinit uniquifier ## _sys_uninit = { \
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subsystem, \
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order, \
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func, \
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(ident) \
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}; \
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DATA_SET(sysuninit_set,uniquifier ## _sys_uninit)
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#define SYSUNINIT(uniquifier, subsystem, order, func, ident) \
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C_SYSUNINIT(uniquifier, subsystem, order, \
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(sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)(ident))
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void sysinit_add(struct sysinit **set, struct sysinit **set_end);
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/*
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* Infrastructure for tunable 'constants'. Value may be specified at compile
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* time or kernel load time. Rules relating tunables together can be placed
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* in a SYSINIT function at SI_SUB_TUNABLES with SI_ORDER_LAST.
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*/
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extern void tunable_int_init(void *);
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struct tunable_int {
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const char *path;
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int *var;
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};
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#define TUNABLE_INT(path, var) \
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_TUNABLE_INT((path), (var), __LINE__)
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#define _TUNABLE_INT(path, var, line) \
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__TUNABLE_INT((path), (var), line)
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#define __TUNABLE_INT(path, var, line) \
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static struct tunable_int __tunable_int_ ## line = { \
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path, \
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var, \
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}; \
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SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \
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tunable_int_init, &__tunable_int_ ## line)
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#define TUNABLE_INT_FETCH(path, var) getenv_int((path), (var))
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extern void tunable_quad_init(void *);
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struct tunable_quad {
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const char *path;
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quad_t *var;
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};
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#define TUNABLE_QUAD(path, var) \
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_TUNABLE_QUAD((path), (var), __LINE__)
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#define _TUNABLE_QUAD(path, var, line) \
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__TUNABLE_QUAD((path), (var), line)
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#define __TUNABLE_QUAD(path, var, line) \
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static struct tunable_quad __tunable_quad_ ## line = { \
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path, \
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var, \
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}; \
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SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \
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tunable_quad_init, &__tunable_quad_ ## line)
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#define TUNABLE_QUAD_FETCH(path, var) getenv_quad((path), (var))
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extern void tunable_str_init(void *);
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struct tunable_str {
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const char *path;
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char *var;
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int size;
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};
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#define TUNABLE_STR(path, var, size) \
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_TUNABLE_STR((path), (var), (size), __LINE__)
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#define _TUNABLE_STR(path, var, size, line) \
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__TUNABLE_STR((path), (var), (size), line)
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#define __TUNABLE_STR(path, var, size, line) \
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static struct tunable_str __tunable_str_ ## line = { \
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path, \
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var, \
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size, \
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}; \
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SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \
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tunable_str_init, &__tunable_str_ ## line)
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#define TUNABLE_STR_FETCH(path, var, size) \
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getenv_string((path), (var), (size))
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struct intr_config_hook {
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TAILQ_ENTRY(intr_config_hook) ich_links;
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void (*ich_func)(void *arg);
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void *ich_arg;
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};
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int config_intrhook_establish(struct intr_config_hook *hook);
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void config_intrhook_disestablish(struct intr_config_hook *hook);
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#endif /* !_SYS_KERNEL_H_*/
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