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Diffstat (limited to 'sys/i386/boot/dosboot/dkbad.h')
| -rw-r--r-- | sys/i386/boot/dosboot/dkbad.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/sys/i386/boot/dosboot/dkbad.h b/sys/i386/boot/dosboot/dkbad.h new file mode 100644 index 0000000..492b848 --- /dev/null +++ b/sys/i386/boot/dosboot/dkbad.h @@ -0,0 +1,99 @@ +/*-
+ * Copyright (c) 1982, 1986, 1993
+ * 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. 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 8.1 (Berkeley) 6/2/93
+ * $Id: dkbad.h,v 1.4 1994/12/11 23:20:50 bde Exp $
+ */
+
+#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 DKBAD_MAGIC 0x4321 /* normal value for bt_flag */
+#define DKBAD_MAXBAD 126 /* maximum bad sectors supported */
+#define DKBAD_NOCYL 0xffff /* cylinder to mark end of disk table */
+
+struct dkbad {
+ long bt_csn; /* cartridge serial number */
+ u_short bt_mbz; /* unused; should be 0 */
+ u_short bt_flag; /* -1 => alignment cartridge */
+ struct bt_bad {
+ u_short bt_cyl; /* cylinder number of bad sector */
+ u_short bt_trksec; /* track and sector number */
+ } bt_bad[DKBAD_MAXBAD];
+};
+
+#define ECC 0
+#define SSE 1
+#define BSE 2
+#define CONT 3
+
+#ifdef KERNEL
+include <sys/conf.h>
+
+#define DKBAD_NOSECT (-1) /* sector to mark end of core table */
+
+struct dkbad_intern {
+ daddr_t bi_maxspare; /* last spare sector */
+ u_int bi_nbad; /* actual dimension of bi_badsect[] */
+ long bi_bad[DKBAD_MAXBAD + 1]; /* actually usually less */
+};
+
+struct disklabel;
+
+struct dkbad_intern *internbad144 __P((struct dkbad *btp,
+ struct disklabel *lp));
+char *readbad144 __P((dev_t dev, d_strategy_t *strat,
+ struct disklabel *lp, struct dkbad *btp));
+daddr_t transbad144 __P((struct dkbad_intern *bip, daddr_t blkno));
+#endif
+
+#endif /* !_SYS_DKBAD_H_ */
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