LCOM1920-T02G10

/*        $NetBSD: dkbad.h,v 1.15 2005/12/26 18:41:36 perry Exp $        */

/*-

 * Copyright (c) 1982, 1986, 1993, 1994

 *        The Regents of the University of California.  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.

 * 3. Neither the name of the University nor the names of its contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.

 *

 *        @(#)dkbad.h        8.2 (Berkeley) 7/10/94

 */

#ifndef _SYS_DKBAD_H_

#define _SYS_DKBAD_H_

/*

 * Definitions needed to perform bad sector revectoring ala DEC STD 144.

 *

 * The bad sector information is located in the first 5 even numbered

 * sectors of the last track of the disk pack.  There are five identical

 * copies of the information, described by the dkbad structure.

 *

 * Replacement sectors are allocated starting with the first sector before

 * the bad sector information and working backwards towards the beginning of

 * the disk.  A maximum of 126 bad sectors are supported.  The position of

 * the bad sector in the bad sector table determines which replacement sector

 * it corresponds to.

 *

 * The bad sector information and replacement sectors are conventionally

 * only accessible through the 'c' file system partition of the disk.  If

 * that partition is used for a file system, the user is responsible for

 * making sure that it does not overlap the bad sector information or any

 * replacement sectors.

 */

#define NBT_BAD        126

struct dkbad {

        int32_t   bt_csn;                /* cartridge serial number */

        uint16_t bt_mbz;                /* unused; should be 0 */

        uint16_t bt_flag;                /* -1 => alignment cartridge */

        struct bt_bad {

                uint16_t bt_cyl;        /* cylinder number of bad sector */

                uint16_t bt_trksec;        /* track and sector number */

        } bt_bad[NBT_BAD];

};

/*

 * An indicator that the bad block handling is available. This is used

 * to conditionally enable code that performs badblock re-mapping.

 */

#define        HAS_BAD144_HANDLING

#define        ECC        0

#define        SSE        1

#define        BSE        2

#define        CONT        3

#ifdef _KERNEL

int isbad(struct dkbad *, int, int, int);

#endif

#endif /* _SYS_DKBAD_H_ */