1 /* $NetBSD: bfs_subr.c,v 1.2 2007/02/22 05:31:53 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by UCHIYAMA Yasushi. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 41 __KERNEL_RCSID(0, "$NetBSD: bfs_subr.c,v 1.2 2007/02/22 05:31:53 thorpej Exp $"); 42 #ifdef _STANDALONE 43 #include <lib/libsa/stand.h> 44 #include <lib/libkern/libkern.h> 45 #include "local.h" 46 #endif 47 48 #include <sys/types.h> 49 #include <sys/systm.h> 50 #include <sys/errno.h> 51 #include <machine/param.h> 52 #include <machine/sector.h> 53 #include <machine/bfs.h> 54 55 struct sector_io_ops __io_ops = { 56 sector_read, 57 sector_read_n, 58 sector_write, 59 sector_write_n 60 }; 61 62 int 63 bfs_init(struct bfs **bfsp) 64 { 65 int err, bfs_sector; 66 67 device_attach(2, 0, -1); /* HARDDISK UNIT 0 */ 68 69 if ((err = bfs_find(&bfs_sector)) != 0) 70 return err; 71 72 return bfs_init2(bfsp, bfs_sector, &__io_ops, false); 73 } 74 75 int 76 bfs_find(int *sector) 77 { 78 static uint8_t buf[DEV_BSIZE]; 79 struct pdinfo_sector *pdinfo; 80 struct vtoc_sector *vtoc; 81 const struct ux_partition *bfs_partition; 82 int start; 83 84 /* Physical Disk INFOrmation */ 85 pdinfo = (struct pdinfo_sector *)buf; 86 if (!pdinfo_sector(0, pdinfo) || !pdinfo_sanity(pdinfo)) 87 return ENOENT; 88 89 /* `start' is logical sector start in UX partition table. */ 90 start = pdinfo->logical_sector; 91 92 /* Volume Table Of Contents */ 93 vtoc = (struct vtoc_sector *)buf; 94 if (!vtoc_sector(0, vtoc, start)) 95 return ENOENT; 96 97 /* Boot File System partition */ 98 if ((bfs_partition = vtoc_find_bfs(vtoc)) == 0) 99 return ENOENT; 100 101 *sector = start + bfs_partition->start_sector; 102 103 return 0; 104 } 105