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

   1 /*      $NetBSD: bootinfo.c,v 1.2 2008/04/28 20:23:36 martin Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1999 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 <sys/param.h>
  33 #include <machine/types.h>
  34 #include <lib/libsa/stand.h>
  35 #include <lib/libkern/libkern.h>
  36
  37 #include "bootinfo.h"
  38
  39 static char *bootinfo = NULL;
  40 static char *bi_next;
  41 static int bi_size;
  42
  43 u_long
  44 bi_init(u_long addr)
  45 {
  46         struct btinfo_common *bi;
  47         struct btinfo_magic bi_magic;
  48         u_long *endp;
  49
  50         endp = (u_long *)ALIGN(addr);
  51         /*
  52          * For the first word we load our end address,
  53          * giving enough space for the bootinfo structure.
  54          */
  55         endp[0] = (u_long)((char *)endp + BOOTINFO_SIZE);
  56         bootinfo = (char *)ALIGN(&endp[2]);
  57         endp[1] = (u_long)bootinfo;
  58         bi = (struct btinfo_common *)bootinfo;
  59         bi->next = bi->type = 0;
  60         bi_next = bootinfo;
  61         bi_size = 0;
  62
  63         bi_magic.magic = BOOTINFO_MAGIC;
  64         bi_add(&bi_magic, BTINFO_MAGIC, sizeof(bi_magic));
  65         return (u_long) endp;
  66 }
  67
  68 void
  69 bi_add(void *new, int type, size_t size)
  70 {
  71         struct btinfo_common *bi;
  72
  73         if (bi_size + size > BOOTINFO_SIZE)
  74                 return;                         /* XXX error? */
  75
  76         bi = new;
  77         bi->next = ALIGN(size);
  78         bi->type = type;
  79         memcpy(bi_next, new, size);
  80         bi_next += ALIGN(size);
  81
  82         bi = (struct btinfo_common *)bi_next;
  83         bi->next = bi->type = 0;
  84 }