/*      $NetBSD: bootinfo.c,v 1.2 2019/12/14 02:58:20 tsutsui 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"

char *bootinfo = NULL;
static char *bi_next;
static int bi_size;

void bi_init(paddr_t addr)
{
       struct btinfo_common *bi;
       struct btinfo_magic bi_magic;

       bootinfo = (char *)addr;
       bi = (struct btinfo_common *)bootinfo;
       bi->next = bi->type = 0;
       bi_next = 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, int size)
{
       struct btinfo_common *bi;

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

       bi = new;
       bi->next = size;
       bi->type = type;
       memcpy(bi_next, new, size);
       bi_next += size;

       bi = (struct btinfo_common *)bi_next;
       bi->next = bi->type = 0;
}