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      1 /*	$NetBSD: inkernel.c,v 1.9 2008/04/28 20:23:33 martin 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 }
     83