/*      $NetBSD: inkernel.c,v 1.9 2009/03/18 10:22:27 cegger 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)

int inopen(struct open_file *);
int inclose(struct open_file *);
int instrategy(void *, int, daddr_t, size_t, void *, size_t *);

void
init_in(void)
{
       int p;

       for (p = endaddr(); p < KERNENTRY; p += sizeof (int)) {
               if (*(int *)p != BEBOX_ENTRY ||
                   *(int *)(p + sizeof (int)) != 0 ||
                   *(int *)(p + sizeof (int) * 2) != 0)
                       continue;

               p += sizeof (int) * 3;
               if (memcmp((char *)p, bebox_magic, BEBOX_MAGICSIZE) == 0) {
                       kern_len = *(int *)(p + BEBOX_MAGICSIZE);
                       memcpy((char *)KERNENTRY,
                               (char *)(p + BEBOX_MAGICSIZE + KERNLENSIZE),
                               kern_len);
                       break;
               }
       }
}

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 + blk * DEV_BSIZE, size);
       *rsize = size;
       return (0);
}