1 /* $NetBSD: bfs_subr.c,v 1.3 2008/04/28 20:23:18 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 34 __KERNEL_RCSID(0, "$NetBSD: bfs_subr.c,v 1.3 2008/04/28 20:23:18 martin Exp $"); 35 #ifdef _STANDALONE 36 #include <lib/libsa/stand.h> 37 #include <lib/libkern/libkern.h> 38 #include "local.h" 39 #endif 40 41 #include <sys/types.h> 42 #include <sys/systm.h> 43 #include <sys/errno.h> 44 #include <machine/param.h> 45 #include <machine/sector.h> 46 #include <machine/bfs.h> 47 48 struct sector_io_ops __io_ops = { 49 sector_read, 50 sector_read_n, 51 sector_write, 52 sector_write_n 53 }; 54 55 int 56 bfs_init(struct bfs **bfsp) 57 { 58 int err, bfs_sector; 59 60 device_attach(2, 0, -1); /* HARDDISK UNIT 0 */ 61 62 if ((err = bfs_find(&bfs_sector)) != 0) 63 return err; 64 65 return bfs_init2(bfsp, bfs_sector, &__io_ops, false); 66 } 67 68 int 69 bfs_find(int *sector) 70 { 71 static uint8_t buf[DEV_BSIZE]; 72 struct pdinfo_sector *pdinfo; 73 struct vtoc_sector *vtoc; 74 const struct ux_partition *bfs_partition; 75 int start; 76 77 /* Physical Disk INFOrmation */ 78 pdinfo = (struct pdinfo_sector *)buf; 79 if (!pdinfo_sector(0, pdinfo) || !pdinfo_sanity(pdinfo)) 80 return ENOENT; 81 82 /* `start' is logical sector start in UX partition table. */ 83 start = pdinfo->logical_sector; 84 85 /* Volume Table Of Contents */ 86 vtoc = (struct vtoc_sector *)buf; 87 if (!vtoc_sector(0, vtoc, start)) 88 return ENOENT; 89 90 /* Boot File System partition */ 91 if ((bfs_partition = vtoc_find_bfs(vtoc)) == 0) 92 return ENOENT; 93 94 *sector = start + bfs_partition->start_sector; 95 96 return 0; 97 } 98