sys/modules/miniroot/miniroot.c

   1 /*      $NetBSD: miniroot.c,v 1.2 2008/11/16 15:46:10 ad Exp $  */
   2
   3 /*-
   4  * Copyright (c) 2008 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 #include <sys/cdefs.h>
  30 __KERNEL_RCSID(0, "$NetBSD: miniroot.c,v 1.2 2008/11/16 15:46:10 ad Exp $");
  31
  32 #include <sys/param.h>
  33 #include <sys/kernel.h>
  34 #include <sys/module.h>
  35
  36 #include <dev/md.h>
  37
  38 MODULE(MODULE_CLASS_MISC, miniroot, NULL);
  39
  40 static int
  41 miniroot_modcmd(modcmd_t cmd, void *arg)
  42 {
  43         void *addr;
  44         int error;
  45         size_t size;
  46
  47         switch (cmd) {
  48         case MODULE_CMD_INIT:
  49                 error = module_find_section("miniroot", &addr, &size);
  50                 if (error == 0) {
  51                         if (size == 0) {
  52                                 error = EINVAL;
  53                         } else {
  54                                 md_root_setconf(addr, size);
  55                         }
  56                 }
  57                 return error;
  58
  59         case MODULE_CMD_FINI:
  60                 return EOPNOTSUPP;
  61
  62         default:
  63                 return ENOTTY;
  64         }
  65 }