1/* $NetBSD$ */ 2 3/* 4 * Copyright (c) 1989, 1990, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)mfs_vfsops.c 8.11 (Berkeley) 6/19/95 32 */ 33 34#include <sys/cdefs.h> 35__KERNEL_RCSID(0, "$NetBSD$"); 36 37#include <sys/param.h> 38 39#include <ufs/mfs/mfs_extern.h> 40#include <ufs/ffs/fs.h> 41 42void * mfs_rootbase; /* address of mini-root in kernel virtual memory */ 43u_long mfs_rootsize; /* size of mini-root in bytes */ 44 45/* 46 * This is called early in boot to set the base address and size 47 * of the mini-root. 48 */ 49int 50mfs_initminiroot(void *base) 51{ 52 struct fs *fs = (struct fs *)((char *)base + SBLOCK_UFS1); 53 static bool inited = false; 54 55 if (inited) 56 panic("mfs_initminiroot() called more than once"); 57 inited = true; 58 59 /* check for valid super block */ 60 if (fs->fs_magic != FS_UFS1_MAGIC || fs->fs_bsize > MAXBSIZE || 61 fs->fs_bsize < sizeof(struct fs)) 62 return (0); 63 rootfstype = MOUNT_MFS; 64 mfs_rootbase = base; 65 mfs_rootsize = fs->fs_fsize * fs->fs_size; 66 rootdev = makedev(255, 0); 67 return (mfs_rootsize); 68} 69