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Annotation of Net2/sys/reboot.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986, 1988 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)reboot.h    7.6 (Berkeley) 6/28/90
        !            34:  */
        !            35: 
        !            36: /*
        !            37:  * Arguments to reboot system call.
        !            38:  * These are passed to boot program in r11,
        !            39:  * and on to init.
        !            40:  */
        !            41: #define        RB_AUTOBOOT     0       /* flags for system auto-booting itself */
        !            42: 
        !            43: #define        RB_ASKNAME      0x01    /* ask for file name to reboot from */
        !            44: #define        RB_SINGLE       0x02    /* reboot to single user only */
        !            45: #define        RB_NOSYNC       0x04    /* dont sync before reboot */
        !            46: #define        RB_HALT         0x08    /* don't reboot, just halt */
        !            47: #define        RB_INITNAME     0x10    /* name given for /etc/init (unused) */
        !            48: #define        RB_DFLTROOT     0x20    /* use compiled-in rootdev */
        !            49: #define        RB_KDB          0x40    /* give control to kernel debugger */
        !            50: #define        RB_RDONLY       0x80    /* mount root fs read-only */
        !            51: #define        RB_DUMP         0x100   /* dump kernel memory before reboot */
        !            52: 
        !            53: /*
        !            54:  * Constants for converting boot-style device number to type,
        !            55:  * adaptor (uba, mba, etc), unit number and partition number.
        !            56:  * Type (== major device number) is in the low byte
        !            57:  * for backward compatibility.  Except for that of the "magic
        !            58:  * number", each mask applies to the shifted value.
        !            59:  * Format:
        !            60:  *      (4) (4) (4) (4)  (8)     (8)
        !            61:  *     --------------------------------
        !            62:  *     |MA | AD| CT| UN| PART  | TYPE |
        !            63:  *     --------------------------------
        !            64:  */
        !            65: #define        B_ADAPTORSHIFT          24
        !            66: #define        B_ADAPTORMASK           0x0f
        !            67: #define        B_ADAPTOR(val)          (((val) >> B_ADAPTORSHIFT) & B_ADAPTORMASK)
        !            68: #define B_CONTROLLERSHIFT      20
        !            69: #define B_CONTROLLERMASK       0xf
        !            70: #define        B_CONTROLLER(val)       (((val)>>B_CONTROLLERSHIFT) & B_CONTROLLERMASK)
        !            71: #define B_UNITSHIFT            16
        !            72: #define B_UNITMASK             0xf
        !            73: #define        B_UNIT(val)             (((val) >> B_UNITSHIFT) & B_UNITMASK)
        !            74: #define B_PARTITIONSHIFT       8
        !            75: #define B_PARTITIONMASK                0xff
        !            76: #define        B_PARTITION(val)        (((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
        !            77: #define        B_TYPESHIFT             0
        !            78: #define        B_TYPEMASK              0xff
        !            79: #define        B_TYPE(val)             (((val) >> B_TYPESHIFT) & B_TYPEMASK)
        !            80: 
        !            81: #define        B_MAGICMASK     ((u_long)0xf0000000)
        !            82: #define        B_DEVMAGIC      ((u_long)0xa0000000)
        !            83: 
        !            84: #define MAKEBOOTDEV(type, adaptor, controller, unit, partition) \
        !            85:        (((type) << B_TYPESHIFT) | ((adaptor) << B_ADAPTORSHIFT) | \
        !            86:        ((controller) << B_CONTROLLERSHIFT) | ((unit) << B_UNITSHIFT) | \
        !            87:        ((partition) << B_PARTITIONSHIFT) | B_DEVMAGIC)

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