/*      $NetBSD: bootinfo.c,v 1.4 2008/04/28 20:23:13 martin Exp $      */

/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jonathan Stone, Michael Hitch and Simon Burge.
*
* 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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 <machine/types.h>
#include <lib/libsa/stand.h>
#include <lib/libkern/libkern.h>

#include "bootinfo.h"

struct btinfo_common *bootinfo;         /* bootinfo address */

static char *bi_next;                   /* pointer to next bootinfo data */
static int bi_size;                     /* current bootinfo size */

void
bi_init(void *bi_addr)
{
       struct btinfo_magic bi_magic;

       bootinfo = bi_addr;
       bootinfo->next = 0;
       bootinfo->type = BTINFO_NONE;

       bi_next = (void *)bootinfo;
       bi_size = 0;

       bi_magic.magic = BOOTINFO_MAGIC;
       bi_add(&bi_magic, BTINFO_MAGIC, sizeof(bi_magic));
}

void
bi_add(void *new, int type, size_t size)
{
       struct btinfo_common *bi;

       if (bi_size + size > BOOTINFO_SIZE)
               return;         /* XXX should report error? */

       bi_size += size;

       /* register new bootinfo data */
       memcpy(bi_next, new, size);
       bi = (void *)bi_next;
       bi->next = size;
       bi->type = type;

       /* update pointer to next bootinfo data */
       bi_next += size;
       bi = (void *)bi_next;
       bi->next = 0;
       bi->type = BTINFO_NONE;
}