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