sys/arch/i386/stand/lib/bootinfo_memmap.c

   1 /*      $NetBSD: bootinfo_memmap.c,v 1.5 2008/12/14 17:03:43 christos Exp $     */
   2
   3 /*
   4  * Copyright (c) 1999
   5  *      Matthias Drochner.  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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  *
  27  */
  28
  29 #include <lib/libsa/stand.h>
  30 #include "libi386.h"
  31 #include "bootinfo.h"
  32
  33 extern int getmementry(int *, int *);
  34
  35 void
  36 bi_getmemmap(void)
  37 {
  38         int buf[5], i, nranges, n;
  39         struct btinfo_memmap *bimm;
  40
  41         nranges = 0;
  42         i = 0;
  43         do {
  44                 if (getmementry(&i, buf))
  45                         break;
  46                 nranges++;
  47         } while (i);
  48
  49         bimm = alloc(sizeof(struct btinfo_memmap)
  50                 + (nranges - 1) * sizeof(struct bi_memmap_entry));
  51
  52         i = 0;
  53         for (n = 0; n < nranges; n++) {
  54                 getmementry(&i, buf);
  55                 memcpy(&bimm->entry[n], buf, sizeof(struct bi_memmap_entry));
  56         }
  57         bimm->num = nranges;
  58
  59         BI_ADD(bimm, BTINFO_MEMMAP, sizeof(struct btinfo_memmap)
  60                + (nranges - 1) * sizeof(struct bi_memmap_entry));
  61 }