1/*- 2 * Copyright (c) 2008 Marius Strobl <marius@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27#include <sys/cdefs.h> 28__FBSDID("$FreeBSD$"); 29 30#include <sys/param.h> 31#include <geom/geom_disk.h> 32#include <machine/md_var.h> 33 34void 35sparc64_ata_disk_firmware_geom_adjust(struct disk *disk) 36{ 37 38 /* 39 * The VTOC8 disk label only uses 16-bit fields for cylinders, heads 40 * and sectors so the geometry of large disks has to be adjusted. 41 * If the disk is > 32GB at 16 heads and 63 sectors, adjust to 255 42 * sectors (this matches what the OpenSolaris dad(7D) driver does). 43 * If the disk is even > 128GB, additionally adjust the heads to 44 * 255. This allows disks up to the 2TB limit of the extended VTOC8. 45 * XXX the OpenSolaris dad(7D) driver limits the mediasize to 128GB. 46 */ 47 if (disk->d_mediasize > (off_t)65535 * 16 * 63 * disk->d_sectorsize) 48 disk->d_fwsectors = 255; 49 if (disk->d_mediasize > (off_t)65535 * 16 * 255 * disk->d_sectorsize) 50 disk->d_fwheads = 255; 51} 52