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/*-
* Copyright (c) 2008 Marius Strobl <marius@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/sparc64/sparc64/ata_machdep.c 230734 2012-01-29 12:52:34Z marius $");
#include <sys/param.h>
#include <geom/geom_disk.h>
#include <machine/md_var.h>
void
sparc64_ata_disk_firmware_geom_adjust(struct disk *disk)
{
/*
* The VTOC8 disk label only uses 16-bit fields for cylinders, heads
* and sectors so the geometry of large disks has to be adjusted.
* If the disk is > 32GB at 16 heads and 63 sectors, adjust to 255
* sectors (this matches what the OpenSolaris dad(7D) driver does).
* If the the disk is even > 128GB, additionally adjust the heads to
* 255. This allows disks up to the 2TB limit of the extended VTOC8.
* XXX the OpenSolaris dad(7D) driver limits the mediasize to 128GB.
*/
if (disk->d_mediasize > (off_t)65535 * 16 * 63 * disk->d_sectorsize)
disk->d_fwsectors = 255;
if (disk->d_mediasize > (off_t)65535 * 16 * 255 * disk->d_sectorsize)
disk->d_fwheads = 255;
}