NetBSD/sys/arch/bebox/stand/boot/inkernel.c

98 lines
3.0 KiB
C

/* $NetBSD: inkernel.c,v 1.3 1999/06/28 01:20:44 sakamoto Exp $ */
/*-
* Copyright (c) 1996, 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Kazuki Sakamoto.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stand.h>
#include <sys/param.h>
#include "boot.h"
#include "magic.h"
#define KERNENTRY (RELOC - 0x200000)
void
init_in()
{
int p;
for (p = endaddr(); p < KERNENTRY; p += sizeof (int)) {
if (*(int *)p != ENTRY ||
*(int *)(p + sizeof (int)) != 0 ||
*(int *)(p + sizeof (int) * 2) != 0)
continue;
p += sizeof (int) * 3;
if (memcmp((char *)p, magic, MAGICSIZE) == 0) {
kern_len = *(int *)(p + MAGICSIZE);
memcpy((char *)KERNENTRY,
(char *)(p + MAGICSIZE + KERNLENSIZE),
kern_len);
break;
}
}
}
int
inopen(p)
struct open_file *p;
{
if (kern_len)
return (0);
return (EINVAL);
}
int
inclose(p)
struct open_file *p;
{
return (0);
}
int
instrategy(devdata, func, blk, size, buf, rsize)
void *devdata; /* device uniq data */
int func; /* function (read or write) */
daddr_t blk; /* block number */
size_t size; /* request size in bytes */
void *buf; /* buffer */
size_t *rsize; /* bytes transferred */
{
memcpy(buf, (char *)(KERNENTRY + blk * DEV_BSIZE), size);
*rsize = size;
return (0);
}