sys/arch/prep/stand/boot/inkernel.c

   1 /*      $NetBSD: inkernel.c,v 1.8 2007/12/19 19:47:08 garbled Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Kazuki Sakamoto.
   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 <lib/libsa/stand.h>
  33 #include <sys/param.h>
  34
  35 #include "boot.h"
  36 #include "magic.h"
  37
  38 #define KERNENTRY       (RELOC - 0x200000)
  39
  40 void
  41 init_in(u_long ladr)
  42 {
  43         extern char _start[], _edata[];
  44         char *p = (char *)(ladr + (_edata - _start));
  45         u_int i;
  46
  47         for (i = 0; i < 4096; i++, p++) {
  48                 if (memcmp(p, prep_magic, PREP_MAGICSIZE) == 0) {
  49                         kern_len = *(int *)(p + PREP_MAGICSIZE);
  50                         memmove((char *)KERNENTRY,
  51                                 p + PREP_MAGICSIZE + KERNLENSIZE, kern_len);
  52                         return;
  53                 }
  54         }
  55         printf("magic is not found.\n");
  56 }
  57
  58 int
  59 inopen(struct open_file *p)
  60 {
  61
  62         if (kern_len)
  63                 return (0);
  64         return (EINVAL);
  65 }
  66
  67 int
  68 inclose(struct open_file *p)
  69 {
  70
  71         return (0);
  72 }
  73
  74 int
  75 instrategy(void *devdata, int func, daddr_t blk, size_t size, void *buf,
  76         size_t *rsize)
  77 {
  78
  79         memcpy(buf, (char *)KERNENTRY + ((long)blk * DEV_BSIZE), size);
  80         *rsize = size;
  81         return (0);
  82 }