/*      $NetBSD: inkernel.c,v 1.9 2008/04/28 20:23:33 martin Exp $      */

/*-
* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Kazuki Sakamoto.
*
* 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 <lib/libsa/stand.h>
#include <sys/param.h>

#include "boot.h"
#include "magic.h"

#define KERNENTRY       (RELOC - 0x200000)

void
init_in(u_long ladr)
{
       extern char _start[], _edata[];
       char *p = (char *)(ladr + (_edata - _start));
       u_int i;

       for (i = 0; i < 4096; i++, p++) {
               if (memcmp(p, prep_magic, PREP_MAGICSIZE) == 0) {
                       kern_len = *(int *)(p + PREP_MAGICSIZE);
                       memmove((char *)KERNENTRY,
                               p + PREP_MAGICSIZE + KERNLENSIZE, kern_len);
                       return;
               }
       }
       printf("magic is not found.\n");
}

int
inopen(struct open_file *p)
{

       if (kern_len)
               return (0);
       return (EINVAL);
}

int
inclose(struct open_file *p)
{

       return (0);
}

int
instrategy(void *devdata, int func, daddr_t blk, size_t size, void *buf,
       size_t *rsize)
{

       memcpy(buf, (char *)KERNENTRY + ((long)blk * DEV_BSIZE), size);
       *rsize = size;
       return (0);
}