82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/* $NetBSD: md_root.c,v 1.6 1997/12/10 21:56:30 matthias Exp $ */
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/*
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* Copyright (c) 1995 Gordon W. Ross
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* All rights reserved.
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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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/reboot.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 4096
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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 mdsetimage(8) for details.
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*/
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u_int32_t 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 autoconfig.
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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("md%d: internal %dK image area\n", unit,
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ROOTBYTES / 1024);
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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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