sys/arch/cobalt/stand/boot/bootinfo.c

   1 /*      $NetBSD: bootinfo.c,v 1.5 2008/01/31 17:39:24 tsutsui Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1999, 2000 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jonathan Stone, Michael Hitch and Simon Burge.
   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  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <machine/types.h>
  33 #include <lib/libsa/stand.h>
  34 #include <lib/libkern/libkern.h>
  35
  36 #include "boot.h"
  37 #include "bootinfo.h"
  38
  39 static char *bootinfo = NULL;
  40 static char *bi_next;
  41 static int bi_size;
  42
  43 char *
  44 bi_init(void)
  45 {
  46         struct btinfo_common *bi;
  47         struct btinfo_magic bi_magic;
  48
  49         if ((bootinfo = (char *)alloc(BOOTINFO_SIZE)) != NULL) {
  50                 bi = (struct btinfo_common *)bootinfo;
  51                 bi->next = bi->type = 0;
  52                 bi_next = bootinfo;
  53                 bi_size = 0;
  54
  55                 bi_magic.magic = BOOTINFO_MAGIC;
  56                 bi_add(&bi_magic, BTINFO_MAGIC, sizeof(bi_magic));
  57         }
  58
  59         return bootinfo;
  60 }
  61
  62 void bi_add(void *new, int type, int size)
  63 {
  64         struct btinfo_common *bi;
  65
  66         if (bi_size + size > BOOTINFO_SIZE)
  67                 return;                         /* XXX error? */
  68
  69         if (bootinfo != NULL) {
  70                 DPRINTF(("Adding %d of size %d @0x%x\n",
  71                                         type, size, (char*)bi_next));
  72
  73                 bi = new;
  74                 bi->next = size;
  75                 bi->type = type;
  76                 memcpy(bi_next, new, size);
  77                 bi_next += size;
  78
  79                 bi = (struct btinfo_common *)bi_next;
  80                 bi->next = bi->type = 0;
  81
  82                 bi_size += size;
  83         }
  84 }