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inkernel.c revision 1.5 
      1 /*	$NetBSD: inkernel.c,v 1.5 2005/06/28 21:03:02 junyoung 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 #include "boot.h"
     42 #include "magic.h"
     43 
     44 #define	KERNENTRY	(RELOC - 0x200000)
     45 
     46 void
     47 init_in()
     48 {
     49 	int p;
     50 
     51 	for (p = endaddr(); p < KERNENTRY; p += sizeof (int)) {
     52 		if (*(int *)p != ENTRY ||
     53 		    *(int *)(p + sizeof (int)) != 0 ||
     54 		    *(int *)(p + sizeof (int) * 2) != 0)
     55 			continue;
     56 
     57 		p += sizeof (int) * 3;
     58 		if (memcmp((char *)p, magic, MAGICSIZE) == 0) {
     59 			kern_len = *(int *)(p + MAGICSIZE);
     60 			memcpy((char *)KERNENTRY,
     61 				(char *)(p + MAGICSIZE + KERNLENSIZE),
     62 				kern_len);
     63 			break;
     64 		}
     65 	}
     66 }
     67 
     68 int
     69 inopen(p)
     70 	struct open_file *p;
     71 {
     72 	if (kern_len)
     73 		return (0);
     74 	return (EINVAL);
     75 }
     76 
     77 int
     78 inclose(p)
     79 	struct open_file *p;
     80 {
     81 	return (0);
     82 }
     83 
     84 int
     85 instrategy(devdata, func, blk, size, buf, rsize)
     86 	void *devdata;	/* device uniq data */
     87 	int func;	/* function (read or write) */
     88 	daddr_t blk;	/* block number */
     89 	size_t size;	/* request size in bytes */
     90 	void *buf;	/* buffer */
     91 	size_t *rsize;	/* bytes transferred */
     92 {
     93 
     94 	memcpy(buf, (char *)KERNENTRY + blk * DEV_BSIZE, size);
     95 	*rsize = size;
     96 	return (0);
     97 }
     98