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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [libnetworking/] [sys/] [kernel.h] - Rev 291
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/*- * 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 1.2 2001-09-27 12:02:00 chris Exp $ */ #ifndef _SYS_KERNEL_H_ #define _SYS_KERNEL_H_ /* 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 volatile struct timeval mono_time; extern struct timeval boottime; extern struct timeval runtime; /* extern volatile struct timeval time; */ extern struct timezone tz; /* XXX */ 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 ticks; extern int lbolt; /* once a second sleep address */ extern int tickdelta; extern long timedelta; /* * The following macros are used to declare global sets of objects, which * are collected by the linker into a `struct linker_set' as defined below. * * NB: the constants defined below must match those defined in * ld/ld.h. Since their calculation requires arithmetic, we * can't name them symbolically (e.g., 23 is N_SETT | N_EXT). */ #define MAKE_SET(set, sym, type) #define TEXT_SET(set, sym) MAKE_SET(set, sym, 23) #define DATA_SET(set, sym) MAKE_SET(set, sym, 25) #define BSS_SET(set, sym) MAKE_SET(set, sym, 27) #define ABS_SET(set, sym) MAKE_SET(set, sym, 21) /* * 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 = 0x00000000, /* not executed; for linker*/ SI_SUB_CONSOLE = 0x08000000, /* console*/ SI_SUB_COPYRIGHT = 0x08000001, /* first use of console*/ SI_SUB_VM = 0x10000000, /* virtual memory system init*/ SI_SUB_KMEM = 0x18000000, /* kernel memory*/ SI_SUB_CPU = 0x20000000, /* CPU resource(s)*/ SI_SUB_DEVFS = 0x22000000, /* get DEVFS ready */ SI_SUB_DRIVERS = 0x23000000, /* Let Drivers initialize */ SI_SUB_CONFIGURE = 0x24000000, /* Configure devices */ SI_SUB_INTRINSIC = 0x28000000, /* proc 0*/ SI_SUB_RUN_QUEUE = 0x30000000, /* the run queue*/ SI_SUB_VM_CONF = 0x38000000, /* config VM, set limits*/ SI_SUB_VFS = 0x40000000, /* virtual file system*/ SI_SUB_CLOCKS = 0x48000000, /* real time and stat clocks*/ SI_SUB_MBUF = 0x50000000, /* mbufs*/ SI_SUB_CLIST = 0x58000000, /* clists*/ SI_SUB_SYSV_SHM = 0x64000000, /* System V shared memory*/ SI_SUB_SYSV_SEM = 0x68000000, /* System V semaphores*/ SI_SUB_SYSV_MSG = 0x6C000000, /* System V message queues*/ SI_SUB_PSEUDO = 0x70000000, /* pseudo devices*/ SI_SUB_PROTO_BEGIN = 0x80000000, /* XXX: set splimp (kludge)*/ SI_SUB_PROTO_IF = 0x84000000, /* interfaces*/ SI_SUB_PROTO_DOMAIN = 0x88000000, /* domains (address families?)*/ SI_SUB_PROTO_END = 0x8fffffff, /* XXX: set splx (kludge)*/ SI_SUB_KPROF = 0x90000000, /* kernel profiling*/ SI_SUB_KICK_SCHEDULER = 0xa0000000, /* start the timeout events*/ SI_SUB_ROOT = 0xb0000000, /* root mount*/ SI_SUB_ROOT_FDTAB = 0xb8000000, /* root vnode in fd table...*/ SI_SUB_SWAP = 0xc0000000, /* swap*/ SI_SUB_INTRINSIC_POST = 0xd0000000, /* proc 0 cleanup*/ SI_SUB_KTHREAD_INIT = 0xe0000000, /* init process*/ SI_SUB_KTHREAD_PAGE = 0xe4000000, /* pageout daemon*/ SI_SUB_KTHREAD_VM = 0xe8000000, /* vm daemon*/ SI_SUB_KTHREAD_UPDATE = 0xec000000, /* update daemon*/ SI_SUB_RUN_SCHEDULER = 0xffffffff /* scheduler: no return*/ }; /* * Some enumerated orders; "ANY" sorts last. */ enum sysinit_elem_order { SI_ORDER_FIRST = 0x00000000, /* first*/ SI_ORDER_SECOND = 0x00000001, /* second*/ SI_ORDER_THIRD = 0x00000002, /* third*/ SI_ORDER_MIDDLE = 0x10000000, /* somewhere in the middle */ SI_ORDER_ANY = 0xffffffff /* 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_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) /* * Call 'fork()' before calling '(*func)(ident)'; * for making a kernel 'thread' (or builtin process.) */ #define SYSINIT_KT(uniquifier, subsystem, order, func, ident) /* * 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)); #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) { \ DISPATCH(lkmtp, cmd, ver, name ## _load, name ## _unload, \ lkm_nullcmd); } #else /* PSEUDO_LKM */ /* * Compatibility. To be deprecated after LKM is updated. */ #define PSEUDO_SET(sym, name) SYSINIT(ps, SI_SUB_PSEUDO, SI_ORDER_ANY, sym, 0) #endif /* PSEUDO_LKM */ struct linker_set { int ls_length; const void *ls_items[1]; /* really ls_length of them, * trailing NULL */ }; extern struct linker_set execsw_set; #endif /* !_SYS_KERNEL_H_*/
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