90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/* $NetBSD: inkernel.c,v 1.9 2009/03/18 10:22:27 cegger Exp $ */
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/*-
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* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Kazuki Sakamoto.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <lib/libsa/stand.h>
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#include <sys/param.h>
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#include "boot.h"
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#include "magic.h"
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#define KERNENTRY (RELOC - 0x200000)
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int inopen(struct open_file *);
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int inclose(struct open_file *);
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int instrategy(void *, int, daddr_t, size_t, void *, size_t *);
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void
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init_in(void)
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{
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int p;
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for (p = endaddr(); p < KERNENTRY; p += sizeof (int)) {
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if (*(int *)p != BEBOX_ENTRY ||
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*(int *)(p + sizeof (int)) != 0 ||
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*(int *)(p + sizeof (int) * 2) != 0)
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continue;
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p += sizeof (int) * 3;
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if (memcmp((char *)p, bebox_magic, BEBOX_MAGICSIZE) == 0) {
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kern_len = *(int *)(p + BEBOX_MAGICSIZE);
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memcpy((char *)KERNENTRY,
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(char *)(p + BEBOX_MAGICSIZE + KERNLENSIZE),
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kern_len);
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break;
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}
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}
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}
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int
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inopen(struct open_file *p)
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{
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if (kern_len)
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return (0);
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return (EINVAL);
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}
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int
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inclose(struct open_file *p)
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{
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return (0);
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}
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int
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instrategy(void *devdata, int func, daddr_t blk, size_t size, void *buf,
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size_t *rsize)
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{
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memcpy(buf, (char *)KERNENTRY + blk * DEV_BSIZE, size);
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*rsize = size;
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return (0);
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}
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