/*      $NetBSD: bootinfo_memmap.c,v 1.8 2024/08/24 20:23:11 riastradh Exp $    */

/*
* Copyright (c) 1999
*      Matthias Drochner.  All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/

#include <lib/libsa/stand.h>
#include "libi386.h"
#include "bootinfo.h"

struct btinfo_memmap *btinfo_memmap = NULL;

extern int getmementry(int *, int *);

void
bi_getmemmap(void)
{
       /*
        * Allocate 6 words, not 5, to work around buggy firmware --
        * see comment on getmementry in biosmemx.S.
        */
       int buf[6], i, nranges, n;

       nranges = 0;
       i = 0;
       do {
               if (getmementry(&i, buf))
                       break;
               nranges++;
       } while (i);

       btinfo_memmap = alloc(sizeof(struct btinfo_memmap)
               + (nranges - 1) * sizeof(struct bi_memmap_entry));

       i = 0;
       for (n = 0; n < nranges; n++) {
               getmementry(&i, buf);
               memcpy(&btinfo_memmap->entry[n], buf,
                      sizeof(struct bi_memmap_entry));
       }
       btinfo_memmap->num = nranges;

       BI_ADD(btinfo_memmap, BTINFO_MEMMAP, sizeof(struct btinfo_memmap)
              + (nranges - 1) * sizeof(struct bi_memmap_entry));
}