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/arm/arm/bootconfig.c

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    1 /*      $NetBSD: bootconfig.c,v 1.2 2002/03/10 19:56:39 lukem Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 1994-1998 Mark Brinicombe.
    5  * Copyright (c) 1994 Brini.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software written for Brini by Mark Brinicombe
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  * 3. All advertising materials mentioning features or use of this software
   19  *    must display the following acknowledgement:
   20  *      This product includes software developed by Mark Brinicombe
   21  *      for the NetBSD Project.
   22  * 4. The name of the company nor the name of the author may be used to
   23  *    endorse or promote products derived from this software without specific
   24  *    prior written permission.
   25  *
   26  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
   27  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   28  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   29  * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
   30  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   31  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   32  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   36  * SUCH DAMAGE.
   37  */
   38 
   39 #include <sys/cdefs.h>
   40 __FBSDID("$FreeBSD: releng/10.2/sys/arm/arm/bootconfig.c 236991 2012-06-13 04:59:55Z imp $");
   41 
   42 #include <sys/param.h>
   43 
   44 #include <sys/systm.h>
   45 
   46 #include <machine/bootconfig.h>
   47 
   48 
   49 /*
   50  * Function to identify and process different types of boot argument
   51  */
   52 
   53 int
   54 get_bootconf_option(opts, opt, type, result)
   55         char *opts;
   56         char *opt;
   57         int type;
   58         void *result;
   59 {
   60         char *ptr;
   61         char *optstart;
   62         int not;
   63 
   64         ptr = opts;
   65 
   66         while (*ptr) {
   67                 /* Find start of option */
   68                 while (*ptr == ' ' || *ptr == '\t')
   69                         ++ptr;
   70 
   71                 if (*ptr == 0)
   72                         break;
   73 
   74                 not = 0;
   75 
   76                 /* Is it a negate option */
   77                 if ((type & BOOTOPT_TYPE_MASK) == BOOTOPT_TYPE_BOOLEAN && *ptr == '!') {
   78                         not = 1;
   79                         ++ptr;
   80                 }
   81 
   82                 /* Find the end of option */
   83                 optstart = ptr;
   84                 while (*ptr != 0 && *ptr != ' ' && *ptr != '\t' && *ptr != '=')
   85                         ++ptr;
   86 
   87                 if ((*ptr == '=')
   88                     || (*ptr != '=' && ((type & BOOTOPT_TYPE_MASK) == BOOTOPT_TYPE_BOOLEAN))) {
   89                         /* compare the option */
   90                         if (strncmp(optstart, opt, (ptr - optstart)) == 0) {
   91                                 /* found */
   92 
   93                                 if (*ptr == '=')
   94                                         ++ptr;
   95 
   96                                 switch(type & BOOTOPT_TYPE_MASK) {
   97                                 case BOOTOPT_TYPE_BOOLEAN :
   98                                         if (*(ptr - 1) == '=')
   99                                                 *((int *)result) = ((u_int)strtoul(ptr, NULL, 10) != 0);
  100                                         else
  101                                                 *((int *)result) = !not;
  102                                         break;
  103                                 case BOOTOPT_TYPE_STRING :
  104                                         *((char **)result) = ptr;
  105                                         break;                  
  106                                 case BOOTOPT_TYPE_INT :
  107                                         *((int *)result) = (u_int)strtoul(ptr, NULL, 10);
  108                                         break;
  109                                 case BOOTOPT_TYPE_BININT :
  110                                         *((int *)result) = (u_int)strtoul(ptr, NULL, 2);
  111                                         break;
  112                                 case BOOTOPT_TYPE_HEXINT :
  113                                         *((int *)result) = (u_int)strtoul(ptr, NULL, 16);
  114                                         break;
  115                                 default:
  116                                         return(0);
  117                                 }
  118                                 return(1);
  119                         }
  120                 }
  121                 /* skip to next option */
  122                 while (*ptr != ' ' && *ptr != '\t' && *ptr != 0)
  123                         ++ptr;
  124         }
  125         return(0);
  126 }

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