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      1 /*	$NetBSD: inkernel.c,v 1.3 2009/01/12 07:16:17 tsutsui 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 /*#define	KERNENTRY	(0x800000)*/
     40 /* Note that the iplcb lives in the 0x700000 range, so we need to avoid that*/
     41 
     42 void
     43 init_in(u_long ladr)
     44 {
     45 	extern char _start[], _edata[], _end[];
     46 	/*char *p = (char *)(ladr + _end); for loadaddr 0x0*/
     47 	char *p = (char *)(ladr + (_end - ladr));
     48 	u_int i;
     49 
     50 	printf("p=%p start %p edata %p end %p ladr %lx\n", p, _start, _edata, _end, ladr);
     51 
     52 	for (i = 0; i < 4096; i++, p++) {
     53 		if (memcmp(p, rs6000_magic, RS6000_MAGICSIZE) == 0) {
     54 			kern_len = *(int *)(p + RS6000_MAGICSIZE);
     55 			printf("Found magic at 0x%x, kernel is size 0x%x\n", i, kern_len);
     56 			memmove((char *)KERNENTRY,
     57 				p + RS6000_MAGICSIZE + KERNLENSIZE, kern_len);
     58 			return;
     59 		}
     60 	}
     61 	printf("magic is not found.\n");
     62 }
     63 
     64 int
     65 inopen(struct open_file *p)
     66 {
     67 
     68 	if (kern_len)
     69 		return (0);
     70 	return (EINVAL);
     71 }
     72 
     73 int
     74 inclose(struct open_file *p)
     75 {
     76 
     77 	return (0);
     78 }
     79 
     80 int
     81 instrategy(void *devdata, int func, daddr_t blk, size_t size, void *buf,
     82 	size_t *rsize)
     83 {
     84 
     85 	memcpy(buf, (char *)KERNENTRY + ((long)blk * DEV_BSIZE), size);
     86 	*rsize = size;
     87 	return (0);
     88 }
     89