90 lines
2.9 KiB
C
90 lines
2.9 KiB
C
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/* $NetBSD: md_root.c,v 1.1 1997/10/19 08:16:40 oki Exp $ */
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/*-
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* Copyright (c) 1996 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 Gordon W. Ross.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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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 <sys/param.h>
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#include <sys/reboot.h>
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#include <sys/systm.h>
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#include <dev/md.h>
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extern int boothowto;
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#ifndef MINIROOTSIZE
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#define MINIROOTSIZE 512
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#endif
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#define ROOTBYTES (MINIROOTSIZE << DEV_BSHIFT)
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/*
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* This array will be patched to contain a file-system image.
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* See the program: src/usr.sbin/mdsetimage
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*/
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int md_root_size = ROOTBYTES;
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char md_root_image[ROOTBYTES] = "|This is the root ramdisk!\n";
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/*
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* This is called during pseudo-device attachment.
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*/
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void
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md_attach_hook(unit, md)
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int unit;
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struct md_conf *md;
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{
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if (unit == 0) {
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/* Setup root ramdisk */
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md->md_addr = (caddr_t) md_root_image;
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md->md_size = (size_t) md_root_size;
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md->md_type = MD_KMEM_FIXED;
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printf(" fixed, %d blocks", MINIROOTSIZE);
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}
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}
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/*
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* This is called during open (i.e. mountroot)
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*/
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void
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md_open_hook(unit, md)
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int unit;
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struct md_conf *md;
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{
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if (unit == 0) {
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/* The root ramdisk only works single-user. */
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boothowto |= RB_SINGLE;
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}
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}
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