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source: rtems-libbsd/freebsd/sys/sys/kernel.h @ 164c5f5

4.1155-freebsd-126-freebsd-12freebsd-9.3

Last change on this file since 164c5f5 was 164c5f5, checked in by Sebastian Huber <sebastian.huber@…>, on 01/15/14 at 11:46:22
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1	/*-
2	* Copyright (c) 1995 Terrence R. Lambert
3	* All rights reserved.
4	*
5	* Copyright (c) 1990, 1993
6	* The Regents of the University of California. All rights reserved.
7	* (c) UNIX System Laboratories, Inc.
8	* All or some portions of this file are derived from material licensed
9	* to the University of California by American Telephone and Telegraph
10	* Co. or Unix System Laboratories, Inc. and are reproduced herein with
11	* the permission of UNIX System Laboratories, Inc.
12	*
13	* Redistribution and use in source and binary forms, with or without
14	* modification, are permitted provided that the following conditions
15	* are met:
16	* 1. Redistributions of source code must retain the above copyright
17	* notice, this list of conditions and the following disclaimer.
18	* 2. Redistributions in binary form must reproduce the above copyright
19	* notice, this list of conditions and the following disclaimer in the
20	* documentation and/or other materials provided with the distribution.
21	* 3. All advertising materials mentioning features or use of this software
22	* must display the following acknowledgement:
23	* This product includes software developed by the University of
24	* California, Berkeley and its contributors.
25	* 4. Neither the name of the University nor the names of its contributors
26	* may be used to endorse or promote products derived from this software
27	* without specific prior written permission.
28	*
29	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
30	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
31	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
32	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
33	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
34	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
35	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
37	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
38	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39	* SUCH DAMAGE.
40	*
41	* @(#)kernel.h 8.3 (Berkeley) 1/21/94
42	* $FreeBSD$
43	*/
44
45	#ifndef _SYS_KERNEL_H_
46	#define _SYS_KERNEL_H_
47
48	#include <sys/linker_set.h>
49
50	#ifdef _KERNEL
51
52	/* for intrhook below */
53	#include <sys/queue.h>
54
55	/* Global variables for the kernel. */
56
57	#ifndef __rtems__
58	/* 1.1 */
59	extern char kernelname[MAXPATHLEN];
60	#endif /* __rtems__ */
61
62	extern int tick; /* usec per tick (1000000 / hz) */
63	extern int hz; /* system clock's frequency */
64	extern int psratio; /* ratio: prof / stat */
65	extern int stathz; /* statistics clock's frequency */
66	extern int profhz; /* profiling clock's frequency */
67	extern int profprocs; /* number of process's profiling */
68	#ifndef __rtems__
69	extern volatile int ticks;
70	#else /* __rtems__ */
71	#include <rtems/score/watchdogimpl.h>
72	#define ticks _Watchdog_Ticks_since_boot
73	#endif /* __rtems__ */
74
75	#endif /* _KERNEL */
76
77	/*
78	* Enumerated types for known system startup interfaces.
79	*
80	* Startup occurs in ascending numeric order; the list entries are
81	* sorted prior to attempting startup to guarantee order. Items
82	* of the same level are arbitrated for order based on the 'order'
83	* element.
84	*
85	* These numbers are arbitrary and are chosen ONLY for ordering; the
86	* enumeration values are explicit rather than implicit to provide
87	* for binary compatibility with inserted elements.
88	*
89	* The SI_SUB_RUN_SCHEDULER value must have the highest lexical value.
90	*
91	* The SI_SUB_SWAP values represent a value used by
92	* the BSD 4.4Lite but not by FreeBSD; it is maintained in dependent
93	* order to support porting.
94	*/
95	enum sysinit_sub_id {
96	SI_SUB_DUMMY = 0x0000000, /* not executed; for linker*/
97	SI_SUB_DONE = 0x0000001, /* processed*/
98	SI_SUB_TUNABLES = 0x0700000, /* establish tunable values */
99	SI_SUB_COPYRIGHT = 0x0800001, /* first use of console*/
100	SI_SUB_SETTINGS = 0x0880000, /* check and recheck settings */
101	SI_SUB_MTX_POOL_STATIC = 0x0900000, /* static mutex pool */
102	SI_SUB_LOCKMGR = 0x0980000, /* lockmgr locks */
103	SI_SUB_VM = 0x1000000, /* virtual memory system init*/
104	SI_SUB_KMEM = 0x1800000, /* kernel memory*/
105	SI_SUB_KVM_RSRC = 0x1A00000, /* kvm operational limits*/
106	SI_SUB_WITNESS = 0x1A80000, /* witness initialization */
107	SI_SUB_MTX_POOL_DYNAMIC = 0x1AC0000, /* dynamic mutex pool */
108	SI_SUB_LOCK = 0x1B00000, /* various locks */
109	SI_SUB_EVENTHANDLER = 0x1C00000, /* eventhandler init */
110	SI_SUB_VNET_PRELINK = 0x1E00000, /* vnet init before modules */
111	SI_SUB_KLD = 0x2000000, /* KLD and module setup */
112	SI_SUB_CPU = 0x2100000, /* CPU resource(s)*/
113	SI_SUB_RACCT = 0x2110000, /* resource accounting */
114	SI_SUB_RANDOM = 0x2120000, /* random number generator */
115	SI_SUB_KDTRACE = 0x2140000, /* Kernel dtrace hooks */
116	SI_SUB_MAC = 0x2180000, /* TrustedBSD MAC subsystem */
117	SI_SUB_MAC_POLICY = 0x21C0000, /* TrustedBSD MAC policies */
118	SI_SUB_MAC_LATE = 0x21D0000, /* TrustedBSD MAC subsystem */
119	SI_SUB_VNET = 0x21E0000, /* vnet 0 */
120	SI_SUB_INTRINSIC = 0x2200000, /* proc 0*/
121	SI_SUB_VM_CONF = 0x2300000, /* config VM, set limits*/
122	SI_SUB_DDB_SERVICES = 0x2380000, /* capture, scripting, etc. */
123	SI_SUB_RUN_QUEUE = 0x2400000, /* set up run queue*/
124	SI_SUB_KTRACE = 0x2480000, /* ktrace */
125	SI_SUB_OPENSOLARIS = 0x2490000, /* OpenSolaris compatibility */
126	SI_SUB_CYCLIC = 0x24A0000, /* Cyclic timers */
127	SI_SUB_AUDIT = 0x24C0000, /* audit */
128	SI_SUB_CREATE_INIT = 0x2500000, /* create init process*/
129	SI_SUB_SCHED_IDLE = 0x2600000, /* required idle procs */
130	SI_SUB_MBUF = 0x2700000, /* mbuf subsystem */
131	SI_SUB_INTR = 0x2800000, /* interrupt threads */
132	SI_SUB_SOFTINTR = 0x2800001, /* start soft interrupt thread */
133	SI_SUB_ACL = 0x2900000, /* start for filesystem ACLs */
134	SI_SUB_DEVFS = 0x2F00000, /* devfs ready for devices */
135	SI_SUB_INIT_IF = 0x3000000, /* prep for net interfaces */
136	SI_SUB_NETGRAPH = 0x3010000, /* Let Netgraph initialize */
137	SI_SUB_DTRACE = 0x3020000, /* DTrace subsystem */
138	SI_SUB_DTRACE_PROVIDER = 0x3048000, /* DTrace providers */
139	SI_SUB_DTRACE_ANON = 0x308C000, /* DTrace anon enabling */
140	SI_SUB_DRIVERS = 0x3100000, /* Let Drivers initialize */
141	SI_SUB_CONFIGURE = 0x3800000, /* Configure devices */
142	SI_SUB_VFS = 0x4000000, /* virtual filesystem*/
143	SI_SUB_CLOCKS = 0x4800000, /* real time and stat clocks*/
144	SI_SUB_CLIST = 0x5800000, /* clists*/
145	SI_SUB_SYSV_SHM = 0x6400000, /* System V shared memory*/
146	SI_SUB_SYSV_SEM = 0x6800000, /* System V semaphores*/
147	SI_SUB_SYSV_MSG = 0x6C00000, /* System V message queues*/
148	SI_SUB_P1003_1B = 0x6E00000, /* P1003.1B realtime */
149	SI_SUB_PSEUDO = 0x7000000, /* pseudo devices*/
150	SI_SUB_EXEC = 0x7400000, /* execve() handlers */
151	SI_SUB_PROTO_BEGIN = 0x8000000, /* VNET initialization */
152	SI_SUB_PROTO_IF = 0x8400000, /* interfaces*/
153	SI_SUB_PROTO_DOMAININIT = 0x8600000, /* domain registration system */
154	SI_SUB_PROTO_DOMAIN = 0x8800000, /* domains (address families?)*/
155	SI_SUB_PROTO_IFATTACHDOMAIN = 0x8800001, /* domain dependent data init*/
156	SI_SUB_PROTO_END = 0x8ffffff, /* VNET helper functions */
157	SI_SUB_KPROF = 0x9000000, /* kernel profiling*/
158	SI_SUB_KICK_SCHEDULER = 0xa000000, /* start the timeout events*/
159	SI_SUB_INT_CONFIG_HOOKS = 0xa800000, /* Interrupts enabled config */
160	SI_SUB_ROOT_CONF = 0xb000000, /* Find root devices */
161	SI_SUB_DUMP_CONF = 0xb200000, /* Find dump devices */
162	SI_SUB_RAID = 0xb380000, /* Configure GEOM classes */
163	SI_SUB_SWAP = 0xc000000, /* swap */
164	SI_SUB_INTRINSIC_POST = 0xd000000, /* proc 0 cleanup*/
165	SI_SUB_SYSCALLS = 0xd800000, /* register system calls */
166	SI_SUB_VNET_DONE = 0xdc00000, /* vnet registration complete */
167	SI_SUB_KTHREAD_INIT = 0xe000000, /* init process*/
168	SI_SUB_KTHREAD_PAGE = 0xe400000, /* pageout daemon*/
169	SI_SUB_KTHREAD_VM = 0xe800000, /* vm daemon*/
170	SI_SUB_KTHREAD_BUF = 0xea00000, /* buffer daemon*/
171	SI_SUB_KTHREAD_UPDATE = 0xec00000, /* update daemon*/
172	SI_SUB_KTHREAD_IDLE = 0xee00000, /* idle procs*/
173	SI_SUB_SMP = 0xf000000, /* start the APs*/
174	SI_SUB_RACCTD = 0xf100000, /* start raccd*/
175	SI_SUB_RUN_SCHEDULER = 0xfffffff /* scheduler*/
176	};
177
178
179	/*
180	* Some enumerated orders; "ANY" sorts last.
181	*/
182	enum sysinit_elem_order {
183	SI_ORDER_FIRST = 0x0000000, /* first*/
184	SI_ORDER_SECOND = 0x0000001, /* second*/
185	SI_ORDER_THIRD = 0x0000002, /* third*/
186	SI_ORDER_FOURTH = 0x0000003, /* fourth*/
187	SI_ORDER_MIDDLE = 0x1000000, /* somewhere in the middle */
188	SI_ORDER_ANY = 0xfffffff /* last*/
189	};
190
191
192	/*
193	* A system initialization call instance
194	*
195	* At the moment there is one instance of sysinit. We probably do not
196	* want two which is why this code is if'd out, but we definitely want
197	* to discern SYSINIT's which take non-constant data pointers and
198	* SYSINIT's which take constant data pointers,
199	*
200	* The C_* macros take functions expecting const void * arguments
201	* while the non-C_* macros take functions expecting just void * arguments.
202	*
203	* With -Wcast-qual on, the compiler issues warnings:
204	* - if we pass non-const data or functions taking non-const data
205	* to a C_* macro.
206	*
207	* - if we pass const data to the normal macros
208	*
209	* However, no warning is issued if we pass a function taking const data
210	* through a normal non-const macro. This is ok because the function is
211	* saying it won't modify the data so we don't care whether the data is
212	* modifiable or not.
213	*/
214
215	typedef void (sysinit_nfunc_t)(void );
216	typedef void (sysinit_cfunc_t)(const void );
217
218	struct sysinit {
219	enum sysinit_sub_id subsystem; /* subsystem identifier*/
220	enum sysinit_elem_order order; /* init order within subsystem*/
221	sysinit_cfunc_t func; /* function */
222	const void udata; / multiplexer/argument */
223	};
224
225	/*
226	* Default: no special processing
227	*
228	* The C_ version of SYSINIT is for data pointers to const
229	* data ( and functions taking data pointers to const data ).
230	* At the moment it is no different from SYSINIT and thus
231	* still results in warnings.
232	*
233	* The casts are necessary to have the compiler produce the
234	* correct warnings when -Wcast-qual is used.
235	*
236	*/
237	#ifndef __rtems__
238	#define C_SYSINIT(uniquifier, subsystem, order, func, ident) \
239	static struct sysinit uniquifier ## _sys_init = { \
240	subsystem, \
241	order, \
242	func, \
243	(ident) \
244	}; \
245	DATA_SET(sysinit_set,uniquifier ## _sys_init)
246	#else /* __rtems__ */
247	#define SYSINIT_ENTRY_NAME(uniquifier) \
248	_bsd_ ## uniquifier ## _sys_init
249	#define SYSINIT_REFERENCE_NAME(uniquifier) \
250	_bsd_ ## uniquifier ## _sys_init_ref
251	#define C_SYSINIT(uniquifier, subsystem, order, func, ident) \
252	struct sysinit SYSINIT_ENTRY_NAME(uniquifier) = { \
253	subsystem, \
254	order, \
255	func, \
256	(ident) \
257	}; \
258	RWDATA_SET(sysinit_set,SYSINIT_ENTRY_NAME(uniquifier))
259	#define SYSINIT_REFERENCE(uniquifier) \
260	extern struct sysinit SYSINIT_ENTRY_NAME(uniquifier); \
261	static struct sysinit const * const \
262	SYSINIT_REFERENCE_NAME(uniquifier) __used \
263	= &SYSINIT_ENTRY_NAME(uniquifier)
264	#define SYSINIT_MODULE_REFERENCE(mod) \
265	SYSINIT_REFERENCE(mod ## module)
266	#define SYSINIT_DRIVER_REFERENCE(driver, bus) \
267	SYSINIT_MODULE_REFERENCE(driver ## _ ## bus)
268	#define SYSINIT_DOMAIN_REFERENCE(dom) \
269	SYSINIT_REFERENCE(domain_add_ ## dom)
270	#endif /* __rtems__ */
271
272	#define SYSINIT(uniquifier, subsystem, order, func, ident) \
273	C_SYSINIT(uniquifier, subsystem, order, \
274	(sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)(ident))
275
276	/*
277	* Called on module unload: no special processing
278	*/
279	#ifndef __rtems__
280	#define C_SYSUNINIT(uniquifier, subsystem, order, func, ident) \
281	static struct sysinit uniquifier ## _sys_uninit = { \
282	subsystem, \
283	order, \
284	func, \
285	(ident) \
286	}; \
287	DATA_SET(sysuninit_set,uniquifier ## _sys_uninit)
288	#else /* __rtems__ */
289	#define C_SYSUNINIT(uniquifier, subsystem, order, func, ident)
290	#endif /* __rtems__ */
291
292	#define SYSUNINIT(uniquifier, subsystem, order, func, ident) \
293	C_SYSUNINIT(uniquifier, subsystem, order, \
294	(sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)(ident))
295
296	void sysinit_add(struct sysinit set, struct sysinit set_end);
297
298	#ifndef __rtems__
299	/*
300	* Infrastructure for tunable 'constants'. Value may be specified at compile
301	* time or kernel load time. Rules relating tunables together can be placed
302	* in a SYSINIT function at SI_SUB_TUNABLES with SI_ORDER_LAST.
303	*
304	* WARNING: developers should never use the reserved suffixes specified in
305	* loader.conf(5) for any tunables or conflicts will result.
306	*/
307
308	/*
309	* int
310	* please avoid using for new tunables!
311	*/
312	extern void tunable_int_init(void *);
313	struct tunable_int {
314	const char *path;
315	int *var;
316	};
317	#define TUNABLE_INT(path, var) \
318	static struct tunable_int __CONCAT(__tunable_int_, __LINE__) = { \
319	(path), \
320	(var), \
321	}; \
322	SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \
323	SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_int_init, \
324	&__CONCAT(__tunable_int_, __LINE__))
325
326	#define TUNABLE_INT_FETCH(path, var) getenv_int((path), (var))
327
328	/*
329	* long
330	*/
331	extern void tunable_long_init(void *);
332	struct tunable_long {
333	const char *path;
334	long *var;
335	};
336	#define TUNABLE_LONG(path, var) \
337	static struct tunable_long __CONCAT(__tunable_long_, __LINE__) = { \
338	(path), \
339	(var), \
340	}; \
341	SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \
342	SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_long_init,\
343	&__CONCAT(__tunable_long_, __LINE__))
344
345	#define TUNABLE_LONG_FETCH(path, var) getenv_long((path), (var))
346
347	/*
348	* unsigned long
349	*/
350	extern void tunable_ulong_init(void *);
351	struct tunable_ulong {
352	const char *path;
353	unsigned long *var;
354	};
355	#define TUNABLE_ULONG(path, var) \
356	static struct tunable_ulong __CONCAT(__tunable_ulong_, __LINE__) = { \
357	(path), \
358	(var), \
359	}; \
360	SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \
361	SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_ulong_init, \
362	&__CONCAT(__tunable_ulong_, __LINE__))
363
364	#define TUNABLE_ULONG_FETCH(path, var) getenv_ulong((path), (var))
365
366	/*
367	* quad
368	*/
369	extern void tunable_quad_init(void *);
370	struct tunable_quad {
371	const char *path;
372	quad_t *var;
373	};
374	#define TUNABLE_QUAD(path, var) \
375	static struct tunable_quad __CONCAT(__tunable_quad_, __LINE__) = { \
376	(path), \
377	(var), \
378	}; \
379	SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \
380	SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_quad_init, \
381	&__CONCAT(__tunable_quad_, __LINE__))
382
383	#define TUNABLE_QUAD_FETCH(path, var) getenv_quad((path), (var))
384
385	extern void tunable_str_init(void *);
386	struct tunable_str {
387	const char *path;
388	char *var;
389	int size;
390	};
391	#define TUNABLE_STR(path, var, size) \
392	static struct tunable_str __CONCAT(__tunable_str_, __LINE__) = { \
393	(path), \
394	(var), \
395	(size), \
396	}; \
397	SYSINIT(__CONCAT(__Tunable_init_, __LINE__), \
398	SI_SUB_TUNABLES, SI_ORDER_MIDDLE, tunable_str_init, \
399	&__CONCAT(__tunable_str_, __LINE__))
400
401	#define TUNABLE_STR_FETCH(path, var, size) \
402	getenv_string((path), (var), (size))
403	#else /* __rtems__ */
404	#define TUNABLE_INT(path, var)
405	#define TUNABLE_INT_FETCH(path, var)
406	#define TUNABLE_LONG(path, var)
407	#define TUNABLE_LONG_FETCH(path, var)
408	#define TUNABLE_ULONG(path, var)
409	#define TUNABLE_ULONG_FETCH(path, var)
410	#define TUNABLE_QUAD(path, var)
411	#define TUNABLE_QUAD_FETCH(path, var)
412	#define TUNABLE_STR(path, var, size)
413	#define TUNABLE_STR_FETCH(path, var, size)
414	#endif /* __rtems__ */
415
416	struct intr_config_hook {
417	TAILQ_ENTRY(intr_config_hook) ich_links;
418	void (ich_func)(void arg);
419	void *ich_arg;
420	};
421
422	int config_intrhook_establish(struct intr_config_hook *hook);
423	void config_intrhook_disestablish(struct intr_config_hook *hook);
424
425	#endif /* !_SYS_KERNEL_H_*/

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