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inkernel.c revision 1.8 
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <lib/libsa/stand.h>
     40 #include <sys/param.h>
     41 
     42 #include "boot.h"
     43 #include "magic.h"
     44 
     45 #define	KERNENTRY	(RELOC - 0x200000)
     46 
     47 void
     48 init_in(u_long ladr)
     49 {
     50 	extern char _start[], _edata[];
     51 	char *p = (char *)(ladr + (_edata - _start));
     52 	u_int i;
     53 
     54 	for (i = 0; i < 4096; i++, p++) {
     55 		if (memcmp(p, prep_magic, PREP_MAGICSIZE) == 0) {
     56 			kern_len = *(int *)(p + PREP_MAGICSIZE);
     57 			memmove((char *)KERNENTRY,
     58 				p + PREP_MAGICSIZE + KERNLENSIZE, kern_len);
     59 			return;
     60 		}
     61 	}
     62 	printf("magic is not found.\n");
     63 }
     64 
     65 int
     66 inopen(struct open_file *p)
     67 {
     68 
     69 	if (kern_len)
     70 		return (0);
     71 	return (EINVAL);
     72 }
     73 
     74 int
     75 inclose(struct open_file *p)
     76 {
     77 
     78 	return (0);
     79 }
     80 
     81 int
     82 instrategy(void *devdata, int func, daddr_t blk, size_t size, void *buf,
     83 	size_t *rsize)
     84 {
     85 
     86 	memcpy(buf, (char *)KERNENTRY + ((long)blk * DEV_BSIZE), size);
     87 	*rsize = size;
     88 	return (0);
     89 }
     90