The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/boot_flag.h

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    1 /* $NetBSD: boot_flag.h,v 1.7 2008/04/29 19:16:08 ad Exp $ */
    2 
    3 /*-
    4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  *
   16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   26  * POSSIBILITY OF SUCH DAMAGE.
   27  */
   28 
   29 #ifndef _SYS_BOOT_FLAG_H_
   30 #define _SYS_BOOT_FLAG_H_
   31 
   32 #include <sys/reboot.h>
   33 
   34 /*
   35  * Recognize standard boot arguments. If the flag is known, appropriate
   36  * value is or'ed to retval, otherwise retval is left intact.
   37  * Note that not all ports use all flags recognized here. This list is mere
   38  * concatenation of all non-conflicting standard boot flags. Individual ports
   39  * might use also other flags (see e.g. alpha).
   40  */
   41 #define BOOT_FLAG(arg, retval) do {                             \
   42         switch (arg) {                                          \
   43         case '1': /* machine dependent flag */                  \
   44                 (retval) |= RB_MD1;                             \
   45                 break;                                          \
   46         case '2': /* machine dependent flag */                  \
   47                 (retval) |= RB_MD2;                             \
   48                 break;                                          \
   49         case '3': /* machine dependent flag */                  \
   50                 (retval) |= RB_MD3;                             \
   51                 break;                                          \
   52         case '4': /* machine dependent flag */                  \
   53                 (retval) |= RB_MD4;                             \
   54                 break;                                          \
   55         case 'a': /* ask for file name to boot from */          \
   56                 (retval) |= RB_ASKNAME;                         \
   57                 break;                                          \
   58         case 'b': /* always halt, never reboot */               \
   59                 (retval) |= RB_HALT;                            \
   60                 break;                                          \
   61         case 'c': /* userconf */                                \
   62                 (retval) |= RB_USERCONF;                        \
   63                 break;                                          \
   64         case 'd': /* break into the kernel debugger ASAP (if compiled in) */ \
   65                 (retval) |= RB_KDB;                             \
   66                 break;                                          \
   67         case 'm': /* mini root present in memory */             \
   68                 (retval) |= RB_MINIROOT;                        \
   69                 break;                                          \
   70         case 'q': /* boot quietly */                            \
   71                 (retval) |= AB_QUIET;                           \
   72                 break;                                          \
   73         case 's': /* boot to single user */                     \
   74                 (retval) |= RB_SINGLE;                          \
   75                 break;                                          \
   76         case 'v': /* boot verbosely */                          \
   77                 (retval) |= AB_VERBOSE;                         \
   78                 break;                                          \
   79         case 'x': /* boot with debugging messages */            \
   80                 (retval) |= AB_DEBUG;                           \
   81                 break;                                          \
   82         case 'z': /* boot silently */                           \
   83                 (retval) |= AB_SILENT;                          \
   84                 break;                                          \
   85         default:  /* something else, do nothing */              \
   86                 break;                                          \
   87         } /* switch */                                          \
   88                                                                 \
   89         } while (/* CONSTCOND */ 0)
   90 
   91 #endif /* _SYS_BOOT_FLAG_H_ */

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