Current Path : /sys/sparc64/sparc64/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/sparc64/sparc64/cam_machdep.c |
/*- * Copyright (c) 2011 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/cam_machdep.c 230665 2012-01-28 23:12:55Z marius $"); #include <sys/param.h> #include <sys/systm.h> #include <cam/cam.h> #include <cam/cam_ccb.h> #include <machine/md_var.h> int scsi_da_bios_params(struct ccb_calc_geometry *ccg) { uint32_t secs_per_cylinder, size_mb; /* * The VTOC8 disk label only uses 16-bit fields for cylinders, heads * and sectors so the geometry of large disks has to be adjusted. * We generally use the sizing used by cam_calc_geometry(9), except * when it would overflow the cylinders, in which case we use 255 * heads and sectors. This allows disks up to the 2TB limit of the * extended VTOC8. * XXX this doesn't match the sizing used by OpenSolaris, as that * would exceed the 8-bit ccg->heads and ccg->secs_per_track. */ if (ccg->block_size == 0) return (0); size_mb = (1024L * 1024L) / ccg->block_size; if (size_mb == 0) return (0); size_mb = ccg->volume_size / size_mb; if (ccg->volume_size > (uint64_t)65535 * 255 * 63) { ccg->heads = 255; ccg->secs_per_track = 255; } else if (size_mb > 1024) { ccg->heads = 255; ccg->secs_per_track = 63; } else { ccg->heads = 64; ccg->secs_per_track = 32; } secs_per_cylinder = ccg->heads * ccg->secs_per_track; if (secs_per_cylinder == 0) return (0); ccg->cylinders = ccg->volume_size / secs_per_cylinder; return (1); }