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| Current File : //sys/sys/kernel.h |
/*-
* 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: release/9.1.0/sys/sys/kernel.h 220137 2011-03-29 17:47:25Z trasz $
*/
#ifndef _SYS_KERNEL_H_
#define _SYS_KERNEL_H_
#include <sys/linker_set.h>
#ifdef _KERNEL
/* for intrhook below */
#include <sys/queue.h>
/* Global variables for the kernel. */
/* 1.1 */
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;
#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_VNET_PRELINK = 0x1E00000, /* vnet init before modules */
SI_SUB_KLD = 0x2000000, /* KLD and module setup */
SI_SUB_CPU = 0x2100000, /* CPU resource(s)*/
SI_SUB_RACCT = 0x2110000, /* resource accounting */
SI_SUB_RANDOM = 0x2120000, /* random number generator */
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_VNET = 0x21E0000, /* vnet 0 */
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_DOMAININIT = 0x8600000, /* domain registration system */
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_VNET_DONE = 0xdc00000, /* vnet registration complete */
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_RACCTD = 0xf100000, /* start raccd*/
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_FOURTH = 0x0000003, /* fourth*/
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_*/