107 lines
3.3 KiB
C
107 lines
3.3 KiB
C
/* $NetBSD: md_root.c,v 1.2 2001/07/02 17:17:25 uch 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 "opt_md.h"
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#include "opt_mdsize.h"
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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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#if MEMORY_DISK_DYNAMIC
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size_t md_root_size;
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char *md_root_image;
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#else /* MEMORY_DISK_DYNAMIC */
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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 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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#endif /* MEMORY_DISK_DYNAMIC */
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#if MEMORY_DISK_DYNAMIC
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void
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md_root_setconf(char *addr, size_t size)
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{
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md_root_image = addr;
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md_root_size = size;
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}
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#endif /* MEMORY_DISK_DYNAMIC */
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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(int unit, struct md_conf *md)
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{
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char pbuf[9];
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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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format_bytes(pbuf, sizeof(pbuf), md->md_size);
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printf("md%d: internal %s image area\n", unit, pbuf);
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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(int unit, 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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