[unix-history] / usr / src / sys / pmax / stand / dec_boot.h

/*
 * Copyright (c) 1992 Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ralph Campbell.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)dec_boot.h	7.2 (Berkeley) %G%
 *
 * 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	0x02757a
#define DEC_BOOT_SECTOR	0
Commit	Line	Data
12d43ee5 KM	1	/*
	2	* Copyright (c) 1992 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
	6	* Ralph Campbell.
	7	*
	8	* %sccs.include.redist.c%
	9	*
49b96036	10	* @(#)dec_boot.h 7.2 (Berkeley) %G%
12d43ee5 KM	11	*
	12	* devDiskLabel.h --
	13	*
	14	* This defines the disk label that Sun writes on the 0'th sector of
	15	* the 0'th cylinder of its SMD disks. The disk label contains some
	16	* geometry information and also the division of the disk into a
	17	* number of partitions. Each partition is identified to the drive
	18	* by a different unit number.
	19	*
	20	* from: $Header: /sprite/src/kernel/dev/RCS/devDiskLabel.h,
	21	* v 9.4 90/03/01 12:22:36 jhh Exp $ SPRITE (Berkeley)
	22	*/
	23
12d43ee5 KM	24	/*
	25	* Boot block information on the 0th sector.
	26	* The boot program is stored in sequences of contiguous blocks.
	27	* If mode is 0, there is just one sequence of blocks and one Dec_BootMap
	28	* is used. If mode is 1, there are multiple sequences of blocks
	29	* and multiple Dec_BootMaps are used, the last with numBlocks = 0.
49b96036 RC	30	*
	31	* NOTE: The standard disk label offset is 64 which is
	32	* after the boot information expected by the PROM boot loader.
	33	*/
	34
	35	struct Dec_BootMap {
	36	int numBlocks; /* Number of blocks to read. */
	37	int startBlock; /* Starting block on disk. */
	38	};
	39
	40	struct Dec_DiskBoot {
	41	char pad[8];
	42	int magic; /* DEC_BOOT_MAGIC */
	43	int mode; /* Mode for boot info. */
	44	int loadAddr; /* Address to start loading. */
	45	int execAddr; /* Address to start execing. */
	46	struct Dec_BootMap map[61]; /* boot program sections. */
	47	};
12d43ee5 KM	48
12d43ee5 KM	49	#define DEC_BOOT_MAGIC 0x02757a
49b96036	50	#define DEC_BOOT_SECTOR 0