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/* $NetBSD: dec_boot.h,v 1.4 1994/10/26 21:10:51 cgd Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* 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.
*
* @(#)dec_boot.h 8.1 (Berkeley) 6/10/93
*
* devDiskLabel.h --
*
* This defines the disk label that Sun writes on the 0'th sector of
* the 0'th cylinder of its SMD disks. The disk label contains some
* geometry information and also the division of the disk into a
* number of partitions. Each partition is identified to the drive
* by a different unit number.
*
* from: Header: /sprite/src/kernel/dev/RCS/devDiskLabel.h,
* v 9.4 90/03/01 12:22:36 jhh Exp SPRITE (Berkeley)
*/
/*
* Boot block information on the 0th sector.
* The boot program is stored in sequences of contiguous blocks.
* If mode is 0, there is just one sequence of blocks and one Dec_BootMap
* is used. If mode is 1, there are multiple sequences of blocks
* and multiple Dec_BootMaps are used, the last with numBlocks = 0.
*
* NOTE: The standard disk label offset is 64 which is
* after the boot information expected by the PROM boot loader.
*/
struct Dec_BootMap {
int numBlocks; /* Number of blocks to read. */
int startBlock; /* Starting block on disk. */
};
struct Dec_DiskBoot {
char pad[8];
int magic; /* DEC_BOOT_MAGIC */
int mode; /* Mode for boot info. */
int loadAddr; /* Address to start loading. */
int execAddr; /* Address to start execing. */
struct Dec_BootMap map[61]; /* boot program sections. */
};
#define DEC_BOOT_MAGIC 0x0002757a
#define DEC_BOOT_SECTOR 0
/*
* DEC_NUM_DISK_PARTS is the number of partitions that are recorded in
* the label information. The size of the padding in the Dec_DiskLabel
* type is dependent on this number...
*/
#define DEC_NUM_DISK_PARTS 8
/*
* A disk is divided into partitions and this type specifies where a
* partition starts and how many bytes it contains.
*/
typedef struct Dec_DiskMap {
int numBlocks; /* Number of 512 byte blocks in partition. */
int startBlock; /* Start of partition in blocks. */
} Dec_DiskMap;
/*
* Label information on the 31st (DEC_LABEL_SECTOR) sector.
*/
typedef struct Dec_DiskLabel {
char pad0[440]; /* DIFFERENT from sprite!!! */
int magic; /* DEC_LABEL_MAGIC */
int isPartitioned; /* 1 if disk is partitioned. */
Dec_DiskMap map[DEC_NUM_DISK_PARTS]; /* Indicates disk partitions. */
} Dec_DiskLabel;
#define DEC_LABEL_MAGIC 0x00032957
#define DEC_LABEL_SECTOR 31
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