File:  [DragonFly] / src / sys / sys / kernel.h
Revision 1.6: download - view: text, annotated - select for diffs
Mon Nov 10 06:12:17 2003 UTC (10 years, 5 months ago) by dillon
Branches: MAIN
CVS tags: HEAD
Fully synchronize sys/boot from FreeBSD-5.x, but add / to the module path
so /kernel will be found and loaded instead of /boot/kernel.  This will
give us all the capabilities of the FreeBSD-5 boot code including AMD64 and
ELF64 support.

As part of this work, rather then try to adjust ufs/fs.h and friends to get
UFS2 info I instead copied the fs.h and friends from FreeBSD-5 into the
sys/boot subtree

Additionally, import Peter Wemm's linker set improvements from FreeBSD-5.x.
They happen to be compatible with GCC 2.95.x and it allows very few changes
to be made to the boot code.

Additionally import a number of other elements from FreeBSD-5 including
sys/diskmbr.h separation.

    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: src/sys/sys/kernel.h,v 1.63.2.9 2002/07/02 23:00:30 archie Exp $
   43:  * $DragonFly: src/sys/sys/kernel.h,v 1.6 2003/11/10 06:12:17 dillon Exp $
   44:  */
   45: 
   46: #ifndef _SYS_KERNEL_H_
   47: #define _SYS_KERNEL_H_
   48: 
   49: #include <sys/linker_set.h>
   50: 
   51: #ifdef _KERNEL
   52: 
   53: /* for intrhook below */
   54: #include <sys/queue.h>
   55: 
   56: /* Global variables for the kernel. */
   57: 
   58: /* 1.1 */
   59: extern unsigned long hostid;
   60: extern char hostname[MAXHOSTNAMELEN];
   61: extern int hostnamelen;
   62: extern char domainname[MAXHOSTNAMELEN];
   63: extern int domainnamelen;
   64: extern char kernelname[MAXPATHLEN];
   65: 
   66: /* 1.2 */
   67: extern struct timeval boottime;
   68: 
   69: extern struct timezone tz;			/* XXX */
   70: 
   71: extern int tick;			/* usec per tick (1000000 / hz) */
   72: extern int tickadj;			/* "standard" clock skew, us./tick */
   73: extern int hz;				/* system clock's frequency */
   74: extern int psratio;			/* ratio: prof / stat */
   75: extern int stathz;			/* statistics clock's frequency */
   76: extern int profhz;			/* profiling clock's frequency */
   77: extern int ticks;
   78: extern int lbolt;			/* once a second sleep address */
   79: extern int tickdelta;
   80: extern long timedelta;
   81: 
   82: #endif /* _KERNEL */
   83: 
   84: /*
   85:  * Enumerated types for known system startup interfaces.
   86:  *
   87:  * Startup occurs in ascending numeric order; the list entries are
   88:  * sorted prior to attempting startup to guarantee order.  Items
   89:  * of the same level are arbitrated for order based on the 'order'
   90:  * element.
   91:  *
   92:  * These numbers are arbitrary and are chosen ONLY for ordering; the
   93:  * enumeration values are explicit rather than implicit to provide
   94:  * for binary compatibility with inserted elements.
   95:  *
   96:  * The SI_SUB_RUN_SCHEDULER value must have the highest lexical value.
   97:  *
   98:  * The SI_SUB_CONSOLE and SI_SUB_SWAP values represent values used by
   99:  * the BSD 4.4Lite but not by FreeBSD; they are maintained in dependent
  100:  * order to support porting.
  101:  *
  102:  * The SI_SUB_PROTO_BEGIN and SI_SUB_PROTO_END bracket a range of
  103:  * initializations to take place at splimp().  This is a historical
  104:  * wart that should be removed -- probably running everything at
  105:  * splimp() until the first init that doesn't want it is the correct
  106:  * fix.  They are currently present to ensure historical behavior.
  107:  */
  108: enum sysinit_sub_id {
  109: 	SI_SUB_DUMMY		= 0x0000000,	/* not executed; for linker*/
  110: 	SI_SUB_DONE		= 0x0000001,	/* processed*/
  111: 	SI_SUB_CONSOLE		= 0x0800000,	/* console*/
  112: 	SI_SUB_COPYRIGHT	= 0x0800001,	/* first use of console*/
  113: 	SI_SUB_TUNABLES		= 0x0700000,	/* establish tunable values */
  114: 	SI_SUB_VM		= 0x1000000,	/* virtual memory system init*/
  115: 	SI_SUB_KMEM		= 0x1800000,	/* kernel memory*/
  116: 	SI_SUB_KVM_RSRC		= 0x1A00000,	/* kvm operational limits*/
  117: 	SI_SUB_CPU		= 0x1e00000,	/* CPU resource(s)*/
  118: 	SI_SUB_KLD		= 0x1f00000,	/* KLD and module setup */
  119: 	SI_SUB_INTRINSIC	= 0x2000000,	/* proc 0*/
  120: 	SI_SUB_VM_CONF		= 0x2100000,	/* config VM, set limits*/
  121: 	SI_SUB_RUN_QUEUE	= 0x2200000,	/* the run queue*/
  122: 	SI_SUB_CREATE_INIT	= 0x2300000,	/* create the init process */
  123: 	SI_SUB_MBUF		= 0x2380000,	/* mbuf subsystem */
  124: 	SI_SUB_LEAVE_CRIT	= 0x23c0000,	/* allow interrupt operation */
  125: 	SI_SUB_DRIVERS		= 0x2400000,	/* Let Drivers initialize */
  126: 	SI_SUB_CONFIGURE	= 0x3800000,	/* Configure devices */
  127: 	SI_SUB_VFS		= 0x4000000,	/* virtual file system*/
  128: 	SI_SUB_CLOCKS		= 0x4800000,	/* real time and stat clocks*/
  129: 	SI_SUB_CLIST		= 0x5800000,	/* clists*/
  130: 	SI_SUB_SYSV_SHM		= 0x6400000,	/* System V shared memory*/
  131: 	SI_SUB_SYSV_SEM		= 0x6800000,	/* System V semaphores*/
  132: 	SI_SUB_SYSV_MSG		= 0x6C00000,	/* System V message queues*/
  133: 	SI_SUB_P1003_1B		= 0x6E00000,	/* P1003.1B realtime */
  134: 	SI_SUB_PSEUDO		= 0x7000000,	/* pseudo devices*/
  135: 	SI_SUB_EXEC		= 0x7400000,	/* execve() handlers */
  136: 	SI_SUB_PROTO_BEGIN	= 0x8000000,	/* XXX: set splimp (kludge)*/
  137: 	SI_SUB_PROTO_IF		= 0x8400000,	/* interfaces*/
  138: 	SI_SUB_PROTO_DOMAIN	= 0x8800000,	/* domains (address families?)*/
  139: 	SI_SUB_PROTO_END	= 0x8ffffff,	/* XXX: set splx (kludge)*/
  140: 	SI_SUB_KPROF		= 0x9000000,	/* kernel profiling*/
  141: 	SI_SUB_KICK_SCHEDULER	= 0xa000000,	/* start the timeout events*/
  142: 	SI_SUB_INT_CONFIG_HOOKS	= 0xa800000,	/* Interrupts enabled config */
  143: 	SI_SUB_ROOT_CONF	= 0xb000000,	/* Find root devices */
  144: 	SI_SUB_DUMP_CONF	= 0xb200000,	/* Find dump devices */
  145: 	SI_SUB_RAID		= 0xb300000,	/* Configure vinum */
  146: 	SI_SUB_MOUNT_ROOT	= 0xb400000,	/* root mount*/
  147: 	SI_SUB_SWAP		= 0xc000000,	/* swap*/
  148: 	SI_SUB_INTRINSIC_POST	= 0xd000000,	/* proc 0 cleanup*/
  149: 	SI_SUB_KTHREAD_INIT	= 0xe000000,	/* init process*/
  150: 	SI_SUB_KTHREAD_PAGE	= 0xe400000,	/* pageout daemon*/
  151: 	SI_SUB_KTHREAD_VM	= 0xe800000,	/* vm daemon*/
  152: 	SI_SUB_KTHREAD_BUF	= 0xea00000,	/* buffer daemon*/
  153: 	SI_SUB_KTHREAD_UPDATE	= 0xec00000,	/* update daemon*/
  154: 	SI_SUB_KTHREAD_IDLE	= 0xee00000,	/* idle procs*/
  155: 	SI_SUB_SMP		= 0xf000000,	/* idle procs*/
  156: 	SI_SUB_RUN_SCHEDULER	= 0xfffffff	/* scheduler: no return*/
  157: };
  158: 
  159: 
  160: /*
  161:  * Some enumerated orders; "ANY" sorts last.
  162:  */
  163: enum sysinit_elem_order {
  164: 	SI_ORDER_FIRST		= 0x0000000,	/* first*/
  165: 	SI_ORDER_SECOND		= 0x0000001,	/* second*/
  166: 	SI_ORDER_THIRD		= 0x0000002,	/* third*/
  167: 	SI_ORDER_MIDDLE		= 0x1000000,	/* somewhere in the middle */
  168: 	SI_ORDER_ANY		= 0xfffffff	/* last*/
  169: };
  170: 
  171: 
  172: /*
  173:  * A system initialization call instance
  174:  *
  175:  * At the moment there is one instance of sysinit.  We probably do not
  176:  * want two which is why this code is if'd out, but we definitely want
  177:  * to discern SYSINIT's which take non-constant data pointers and
  178:  * SYSINIT's which take constant data pointers,
  179:  *
  180:  * The C_* macros take functions expecting const void * arguments 
  181:  * while the non-C_* macros take functions expecting just void * arguments.
  182:  *
  183:  * With -Wcast-qual on, the compiler issues warnings:
  184:  *	- if we pass non-const data or functions taking non-const data
  185:  *	  to a C_* macro.
  186:  *
  187:  *	- if we pass const data to the normal macros
  188:  *
  189:  * However, no warning is issued if we pass a function taking const data
  190:  * through a normal non-const macro.  This is ok because the function is
  191:  * saying it won't modify the data so we don't care whether the data is
  192:  * modifiable or not.
  193:  */
  194: 
  195: typedef void (*sysinit_nfunc_t) (void *);
  196: typedef void (*sysinit_cfunc_t) (const void *);
  197: 
  198: struct sysinit {
  199: 	unsigned int	subsystem;		/* subsystem identifier*/
  200: 	unsigned int	order;			/* init order within subsystem*/
  201: 	sysinit_cfunc_t func;			/* function		*/
  202: 	const void	*udata;			/* multiplexer/argument */
  203: };
  204: 
  205: /*
  206:  * Default: no special processing
  207:  *
  208:  * The C_ version of SYSINIT is for data pointers to const
  209:  * data ( and functions taking data pointers to const data ).
  210:  * At the moment it is no different from SYSINIT and thus
  211:  * still results in warnings.
  212:  *
  213:  * The casts are necessary to have the compiler produce the
  214:  * correct warnings when -Wcast-qual is used.
  215:  *
  216:  */
  217: #define	C_SYSINIT(uniquifier, subsystem, order, func, ident)	\
  218: 	static struct sysinit uniquifier ## _sys_init = {	\
  219: 		subsystem,					\
  220: 		order,						\
  221: 		func,						\
  222: 		ident						\
  223: 	};							\
  224: 	DATA_SET(sysinit_set,uniquifier ## _sys_init);
  225: 
  226: #define	SYSINIT(uniquifier, subsystem, order, func, ident)	\
  227: 	C_SYSINIT(uniquifier, subsystem, order,			\
  228: 	(sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident)
  229: 
  230: /*
  231:  * Called on module unload: no special processing
  232:  */
  233: #define	C_SYSUNINIT(uniquifier, subsystem, order, func, ident)	\
  234: 	static struct sysinit uniquifier ## _sys_uninit = {	\
  235: 		subsystem,					\
  236: 		order,						\
  237: 		func,						\
  238: 		ident						\
  239: 	};							\
  240: 	DATA_SET(sysuninit_set,uniquifier ## _sys_uninit)
  241: 
  242: #define	SYSUNINIT(uniquifier, subsystem, order, func, ident)	\
  243: 	C_SYSUNINIT(uniquifier, subsystem, order,		\
  244: 	(sysinit_cfunc_t)(sysinit_nfunc_t)func, (void *)ident)
  245: 
  246: void	sysinit_add (struct sysinit **set, struct sysinit **set_end);
  247: 
  248: /*
  249:  * Infrastructure for tunable 'constants'.  Value may be specified at compile
  250:  * time or kernel load time.  Rules relating tunables together can be placed
  251:  * in a SYSINIT function at SI_SUB_TUNABLES with SI_ORDER_LAST.
  252:  */
  253: 
  254: extern void tunable_int_init(void *);
  255: struct tunable_int {
  256: 	const char *path;
  257: 	int *var;
  258: };
  259: #define	TUNABLE_INT(path, var)					\
  260: 	_TUNABLE_INT((path), (var), __LINE__)
  261: #define _TUNABLE_INT(path, var, line)				\
  262: 	__TUNABLE_INT((path), (var), line)
  263: 
  264: #define	__TUNABLE_INT(path, var, line)				\
  265: 	static struct tunable_int __tunable_int_ ## line = {	\
  266: 		path,						\
  267: 		var,						\
  268: 	};							\
  269: 	SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \
  270: 	     tunable_int_init, &__tunable_int_ ## line)
  271: 
  272: #define	TUNABLE_INT_FETCH(path, var)	getenv_int((path), (var))
  273: 
  274: /* Backwards compatability with the old deprecated TUNABLE_INT_DECL API */
  275: #define TUNABLE_INT_DECL(path, defval, var)	\
  276: static void __Tunable_ ## var (void *ignored)	\
  277: {						\
  278: 	(var) = (defval);			\
  279: 	TUNABLE_INT_FETCH((path), &(var));	\
  280: }						\
  281: SYSINIT(__Tunable_init_ ## var, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, __Tunable_ ## var , NULL);
  282: 
  283: extern void tunable_quad_init(void *);
  284: struct tunable_quad {
  285: 	const char *path;
  286: 	quad_t *var;
  287: };
  288: #define	TUNABLE_QUAD(path, var)					\
  289: 	_TUNABLE_QUAD((path), (var), __LINE__)
  290: #define	_TUNABLE_QUAD(path, var, line)				\
  291: 	__TUNABLE_QUAD((path), (var), line)
  292: 
  293: #define	__TUNABLE_QUAD(path, var, line)			\
  294: 	static struct tunable_quad __tunable_quad_ ## line = {	\
  295: 		path,						\
  296: 		var,						\
  297: 	};							\
  298: 	SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \
  299: 	    tunable_quad_init, &__tunable_quad_ ## line)
  300: 
  301: #define	TUNABLE_QUAD_FETCH(path, var)	getenv_quad((path), (var))
  302: 
  303: extern void tunable_str_init(void *);
  304: struct tunable_str {
  305: 	const char *path;
  306: 	char *var;
  307: 	int size;
  308: };
  309: #define	TUNABLE_STR(path, var, size)				\
  310: 	_TUNABLE_STR((path), (var), (size), __LINE__)
  311: #define	_TUNABLE_STR(path, var, size, line)			\
  312: 	__TUNABLE_STR((path), (var), (size), line)
  313: 
  314: #define	__TUNABLE_STR(path, var, size, line)			\
  315: 	static struct tunable_str __tunable_str_ ## line = {	\
  316: 		path,						\
  317: 		var,						\
  318: 		size,						\
  319: 	};							\
  320: 	SYSINIT(__Tunable_init_ ## line, SI_SUB_TUNABLES, SI_ORDER_MIDDLE, \
  321: 	     tunable_str_init, &__tunable_str_ ## line)
  322: 
  323: #define	TUNABLE_STR_FETCH(path, var, size)			\
  324: 	getenv_string((path), (var), (size))
  325: 
  326: /*
  327:  * Compatibility.  To be deprecated after LKM is removed.
  328:  */
  329: #include <sys/module.h>
  330: #define	PSEUDO_SET(sym, name) \
  331: 	static int name ## _modevent(module_t mod, int type, void *data) \
  332: 	{ \
  333: 		void (*initfunc)(void *) = (void (*)(void *))data; \
  334: 		switch (type) { \
  335: 		case MOD_LOAD: \
  336: 			/* printf(#name " module load\n"); */ \
  337: 			initfunc(NULL); \
  338: 			break; \
  339: 		case MOD_UNLOAD: \
  340: 			printf(#name " module unload - not possible for this module type\n"); \
  341: 			return EINVAL; \
  342: 		} \
  343: 		return 0; \
  344: 	} \
  345: 	static moduledata_t name ## _mod = { \
  346: 		#name, \
  347: 		name ## _modevent, \
  348: 		(void *)sym \
  349: 	}; \
  350: 	DECLARE_MODULE(name, name ## _mod, SI_SUB_PSEUDO, SI_ORDER_ANY)
  351: 
  352: extern struct linker_set execsw_set;
  353: 
  354: 
  355: 
  356: 
  357: struct intr_config_hook {
  358: 	TAILQ_ENTRY(intr_config_hook) ich_links;
  359: 	void	(*ich_func) (void *arg);
  360: 	void	*ich_arg;
  361: };
  362: 
  363: int	config_intrhook_establish (struct intr_config_hook *hook);
  364: void	config_intrhook_disestablish (struct intr_config_hook *hook);
  365: 
  366: #endif /* !_SYS_KERNEL_H_*/