269 lines
9.6 KiB
C
269 lines
9.6 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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* $Id: kernel.h,v 1.18 1995/12/16 21:50:15 bde Exp $
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*/
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#ifndef _SYS_KERNEL_H_
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#define _SYS_KERNEL_H_
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/* Global variables for the kernel. */
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/* 1.1 */
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extern 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 volatile struct timeval mono_time;
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extern struct timeval boottime;
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extern struct timeval runtime;
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extern volatile struct timeval time;
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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 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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extern int tickdelta;
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extern long timedelta;
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/*
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* The following macros are used to declare global sets of objects, which
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* are collected by the linker into a `struct linker_set' as defined below.
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*
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* NB: the constants defined below must match those defined in
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* ld/ld.h. Since their calculation requires arithmetic, we
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* can't name them symbolically (e.g., 23 is N_SETT | N_EXT).
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*/
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#define MAKE_SET(set, sym, type) \
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static void *const __set_##set##_sym_##sym = \
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(&__set_##set##_sym_##sym, &sym, 0); \
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asm(".stabs \"_" #set "\", " #type ", 0, 0, _" #sym)
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#define TEXT_SET(set, sym) MAKE_SET(set, sym, 23)
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#define DATA_SET(set, sym) MAKE_SET(set, sym, 25)
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#define BSS_SET(set, sym) MAKE_SET(set, sym, 27)
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#define ABS_SET(set, sym) MAKE_SET(set, sym, 21)
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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 = 0x00000000, /* not executed; for linker*/
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SI_SUB_CONSOLE = 0x08000000, /* console*/
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SI_SUB_COPYRIGHT = 0x08000001, /* first use of console*/
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SI_SUB_VM = 0x10000000, /* virtual memory system init*/
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SI_SUB_KMEM = 0x18000000, /* kernel memory*/
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SI_SUB_CPU = 0x20000000, /* CPU resource(s)*/
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SI_SUB_DEVFS = 0x22000000, /* get DEVFS ready */
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SI_SUB_DRIVERS = 0x23000000, /* Let Drivers initialize */
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SI_SUB_CONFIGURE = 0x24000000, /* Configure devices */
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SI_SUB_INTRINSIC = 0x28000000, /* proc 0*/
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SI_SUB_RUN_QUEUE = 0x30000000, /* the run queue*/
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SI_SUB_VM_CONF = 0x38000000, /* config VM, set limits*/
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SI_SUB_VFS = 0x40000000, /* virtual file system*/
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SI_SUB_CLOCKS = 0x48000000, /* real time and stat clocks*/
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SI_SUB_MBUF = 0x50000000, /* mbufs*/
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SI_SUB_CLIST = 0x58000000, /* clists*/
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SI_SUB_SYSV_SHM = 0x64000000, /* System V shared memory*/
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SI_SUB_SYSV_SEM = 0x68000000, /* System V semaphores*/
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SI_SUB_SYSV_MSG = 0x6C000000, /* System V message queues*/
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SI_SUB_PSEUDO = 0x70000000, /* pseudo devices*/
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SI_SUB_PROTO_BEGIN = 0x80000000, /* XXX: set splimp (kludge)*/
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SI_SUB_PROTO_IF = 0x84000000, /* interfaces*/
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SI_SUB_PROTO_DOMAIN = 0x88000000, /* domains (address families?)*/
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SI_SUB_PROTO_END = 0x8fffffff, /* XXX: set splx (kludge)*/
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SI_SUB_KPROF = 0x90000000, /* kernel profiling*/
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SI_SUB_KICK_SCHEDULER = 0xa0000000, /* start the timeout events*/
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SI_SUB_ROOT = 0xb0000000, /* root mount*/
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SI_SUB_ROOT_FDTAB = 0xb8000000, /* root vnode in fd table...*/
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SI_SUB_SWAP = 0xc0000000, /* swap*/
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SI_SUB_INTRINSIC_POST = 0xd0000000, /* proc 0 cleanup*/
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SI_SUB_KTHREAD_INIT = 0xe0000000, /* init process*/
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SI_SUB_KTHREAD_PAGE = 0xe4000000, /* pageout daemon*/
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SI_SUB_KTHREAD_VM = 0xe8000000, /* vm daemon*/
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SI_SUB_KTHREAD_UPDATE = 0xec000000, /* update daemon*/
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SI_SUB_RUN_SCHEDULER = 0xffffffff /* scheduler: no return*/
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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 = 0x00000000, /* first*/
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SI_ORDER_SECOND = 0x00000001, /* second*/
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SI_ORDER_THIRD = 0x00000002, /* third*/
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SI_ORDER_MIDDLE = 0x10000000, /* somewhere in the middle */
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SI_ORDER_ANY = 0xffffffff /* last*/
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};
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/*
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* System initialization call types; currently two are supported... one
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* to do a simple function call and one to cause a process to be started
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* by the kernel on the callers behalf.
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*/
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typedef enum sysinit_elem_type {
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SI_TYPE_DEFAULT = 0x00000000, /* No special processing*/
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SI_TYPE_KTHREAD = 0x00000001 /* start kernel thread*/
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} si_elem_t;
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/*
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* A system initialization call instance
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*
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* The subsystem
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*/
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struct sysinit {
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unsigned int subsystem; /* subsystem identifier*/
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unsigned int order; /* init order within subsystem*/
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void (*func) __P((void *)); /* init function*/
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void *udata; /* multiplexer/argument */
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si_elem_t type; /* sysinit_elem_type*/
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};
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/*
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* Default: no special processing
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*/
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#define 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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SI_TYPE_DEFAULT \
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}; \
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DATA_SET(sysinit_set,uniquifier ## _sys_init);
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/*
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* Call 'fork()' before calling '(*func)(ident)';
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* for making a kernel 'thread' (or builtin process.)
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*/
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#define SYSINIT_KT(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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SI_TYPE_KTHREAD \
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}; \
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DATA_SET(sysinit_set,uniquifier ## _sys_init);
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/*
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* A kernel process descriptor; used to start "internal" daemons
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*
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* Note: global_procpp may be NULL for no global save area
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*/
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struct kproc_desc {
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char *arg0; /* arg 0 (for 'ps' listing)*/
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void (*func) __P((void)); /* "main" for kernel process*/
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struct proc **global_procpp; /* ptr to proc ptr save area*/
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};
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void kproc_start __P((void *udata));
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#ifdef PSEUDO_LKM
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#include <sys/conf.h>
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#include <sys/exec.h>
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#include <sys/sysent.h>
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#include <sys/lkm.h>
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#define PSEUDO_SET(init, name) \
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extern struct linker_set MODVNOPS; \
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MOD_MISC(name); \
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static int \
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name ## _load(struct lkm_table *lkmtp, int cmd) \
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{ init((void *)NULL /* XXX unused (?) */); return 0; } \
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static int \
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name ## _unload(struct lkm_table *lkmtp, int cmd) \
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{ return EINVAL; } \
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int \
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name ## _mod(struct lkm_table *lkmtp, int cmd, int ver) { \
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DISPATCH(lkmtp, cmd, ver, name ## _load, name ## _unload, \
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lkm_nullcmd); }
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#else /* PSEUDO_LKM */
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/*
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* Compatibility. To be deprecated after LKM is updated.
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*/
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#define PSEUDO_SET(sym, name) SYSINIT(ps, SI_SUB_PSEUDO, SI_ORDER_ANY, sym, 0)
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#endif /* PSEUDO_LKM */
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struct linker_set {
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int ls_length;
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caddr_t ls_items[1]; /* really ls_length of them, trailing NULL */
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};
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extern const struct linker_set execsw_set;
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#endif /* !_SYS_KERNEL_H_*/
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