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inkernel.c revision 1.4 
      1 /*	$NetBSD: inkernel.c,v 1.4 2004/03/10 15:17:01 nonaka 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, magic, MAGICSIZE) == 0) {
     56 			kern_len = *(int *)(p + MAGICSIZE);
     57 			memmove((char *)KERNENTRY,
     58 				p + MAGICSIZE + KERNLENSIZE, kern_len);
     59 			return;
     60 		}
     61 	}
     62 	printf("magic is not found.\n");
     63 }
     64 
     65 int
     66 inopen(p)
     67 	struct open_file *p;
     68 {
     69 
     70 	if (kern_len)
     71 		return (0);
     72 	return (EINVAL);
     73 }
     74 
     75 int
     76 inclose(p)
     77 	struct open_file *p;
     78 {
     79 
     80 	return (0);
     81 }
     82 
     83 int
     84 instrategy(devdata, func, blk, size, buf, rsize)
     85 	void *devdata;	/* device uniq data */
     86 	int func;	/* function (read or write) */
     87 	daddr_t blk;	/* block number */
     88 	size_t size;	/* request size in bytes */
     89 	void *buf;	/* buffer */
     90 	size_t *rsize;	/* bytes transferred */
     91 {
     92 
     93 	memcpy(buf, (char *)KERNENTRY + ((long)blk * DEV_BSIZE), size);
     94 	*rsize = size;
     95 	return (0);
     96 }
     97