Permalink
Fetching contributors…
Cannot retrieve contributors at this time
307 lines (277 sloc) 10.4 KB
/*-
* 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
* $Id: kernel.h,v 1.49 1999/01/14 05:48:46 jdp Exp $
*/
#ifndef _SYS_KERNEL_H_
#define _SYS_KERNEL_H_
#include <sys/linker_set.h>
#ifdef KERNEL
/* Global variables for the kernel. */
/* 1.1 */
extern long hostid;
extern char hostname[MAXHOSTNAMELEN];
extern int hostnamelen;
extern char domainname[MAXHOSTNAMELEN];
extern int domainnamelen;
extern char kernelname[MAXPATHLEN];
/* 1.2 */
extern struct timeval boottime;
extern struct timezone tz; /* XXX */
extern int tick; /* usec per tick (1000000 / hz) */
extern int tickadj; /* "standard" clock skew, us./tick */
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 ticks;
extern int lbolt; /* once a second sleep address */
extern int tickdelta;
extern long timedelta;
#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_CONSOLE and SI_SUB_SWAP values represent values used by
* the BSD 4.4Lite but not by FreeBSD; they are 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_CONSOLE = 0x0800000, /* console*/
SI_SUB_COPYRIGHT = 0x0800001, /* first use of console*/
SI_SUB_VM = 0x1000000, /* virtual memory system init*/
SI_SUB_KMEM = 0x1800000, /* kernel memory*/
SI_SUB_CPU = 0x2000000, /* CPU resource(s)*/
SI_SUB_KLD = 0x2100000, /* KLD and module setup */
SI_SUB_DEVFS = 0x2200000, /* get DEVFS ready */
SI_SUB_DRIVERS = 0x2300000, /* Let Drivers initialize */
SI_SUB_CONFIGURE = 0x2400000, /* Configure devices */
SI_SUB_INTRINSIC = 0x2800000, /* proc 0*/
SI_SUB_RUN_QUEUE = 0x3000000, /* the run queue*/
SI_SUB_VM_CONF = 0x3800000, /* config VM, set limits*/
SI_SUB_VFS = 0x4000000, /* virtual file system*/
SI_SUB_CLOCKS = 0x4800000, /* real time and stat clocks*/
SI_SUB_MBUF = 0x5000000, /* mbufs*/
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_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_MOUNT_ROOT = 0xb400000, /* root mount*/
SI_SUB_ROOT_FDTAB = 0xb800000, /* root vnode in fd table...*/
SI_SUB_SWAP = 0xc000000, /* swap*/
SI_SUB_INTRINSIC_POST = 0xd000000, /* proc 0 cleanup*/
SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/
SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/
SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/
SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/
SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/
SI_SUB_SMP = 0xf000000, /* idle procs*/
SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler: no return*/
};
/*
* 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*/
};
/*
* System initialization call types; currently two are supported... one
* to do a simple function call and one to cause a process to be started
* by the kernel on the callers behalf.
*/
typedef enum sysinit_elem_type {
SI_TYPE_DEFAULT = 0x00000000, /* No special processing*/
SI_TYPE_KTHREAD = 0x00000001, /* start kernel thread*/
SI_TYPE_KPROCESS = 0x00000002 /* start kernel process*/
} si_elem_t;
/*
* A system initialization call instance
*
* The subsystem
*/
struct sysinit {
unsigned int subsystem; /* subsystem identifier*/
unsigned int order; /* init order within subsystem*/
void (*func) __P((void *)); /* init function*/
void *udata; /* multiplexer/argument */
si_elem_t type; /* sysinit_elem_type*/
};
/*
* Default: no special processing
*/
#define SYSINIT(uniquifier, subsystem, order, func, ident) \
static struct sysinit uniquifier ## _sys_init = { \
subsystem, \
order, \
func, \
ident, \
SI_TYPE_DEFAULT \
}; \
DATA_SET(sysinit_set,uniquifier ## _sys_init);
/*
* Called on module unload: no special processing
*/
#define SYSUNINIT(uniquifier, subsystem, order, func, ident) \
static struct sysinit uniquifier ## _sys_uninit = { \
subsystem, \
order, \
func, \
ident, \
SI_TYPE_DEFAULT \
}; \
DATA_SET(sysuninit_set,uniquifier ## _sys_uninit)
/*
* Call 'fork()' before calling '(*func)(ident)';
* for making a kernel 'thread' (or builtin process.)
*/
#define SYSINIT_KT(uniquifier, subsystem, order, func, ident) \
static struct sysinit uniquifier ## _sys_init = { \
subsystem, \
order, \
func, \
ident, \
SI_TYPE_KTHREAD \
}; \
DATA_SET(sysinit_set,uniquifier ## _sys_init);
#define SYSINIT_KP(uniquifier, subsystem, order, func, ident) \
static struct sysinit uniquifier ## _sys_init = { \
subsystem, \
order, \
func, \
ident, \
SI_TYPE_KPROCESS \
}; \
DATA_SET(sysinit_set,uniquifier ## _sys_init);
/*
* A kernel process descriptor; used to start "internal" daemons
*
* Note: global_procpp may be NULL for no global save area
*/
struct kproc_desc {
char *arg0; /* arg 0 (for 'ps' listing)*/
void (*func) __P((void)); /* "main" for kernel process*/
struct proc **global_procpp; /* ptr to proc ptr save area*/
};
void kproc_start __P((void *udata));
void sysinit_add __P((struct sysinit **set));
#ifdef PSEUDO_LKM
#include <sys/conf.h>
#include <sys/exec.h>
#include <sys/sysent.h>
#include <sys/lkm.h>
#define PSEUDO_SET(init, name) \
extern struct linker_set MODVNOPS; \
MOD_MISC(name); \
static int \
name ## _load(struct lkm_table *lkmtp, int cmd) \
{ init((void *)NULL /* XXX unused (?) */); return 0; } \
static int \
name ## _unload(struct lkm_table *lkmtp, int cmd) \
{ return EINVAL; } \
int \
name ## _mod(struct lkm_table *lkmtp, int cmd, int ver) { \
MOD_DISPATCH(name, lkmtp, cmd, ver, name ## _load, name ## _unload, \
lkm_nullcmd); } \
struct __hack
#else /* PSEUDO_LKM */
/*
* Compatibility. To be deprecated after LKM is updated.
*/
#include <sys/module.h>
#define PSEUDO_SET(sym, name) \
static int name ## _modevent(module_t mod, int type, void *data) \
{ \
void (*initfunc)(void *) = (void (*)(void *))data; \
switch (type) { \
case MOD_LOAD: \
/* printf(#name " module load\n"); */ \
initfunc(NULL); \
break; \
case MOD_UNLOAD: \
printf(#name " module unload - not possible for this module type\n"); \
return EINVAL; \
} \
return 0; \
} \
static moduledata_t name ## _mod = { \
#name, \
name ## _modevent, \
(void *)sym \
}; \
DECLARE_MODULE(name, name ## _mod, SI_SUB_PSEUDO, SI_ORDER_ANY)
#endif /* PSEUDO_LKM */
extern struct linker_set execsw_set;
#endif /* !_SYS_KERNEL_H_*/