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      1 /*	$NetBSD: ahdilabel.h,v 1.4 2009/10/20 19:10:11 snj Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Leo Weppelman.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #ifndef _MACHINE_AHDILABEL_H_
     29 #define _MACHINE_AHDILABEL_H_
     30 
     31 #define	AHDI_BSIZE	512		/* AHDI blocksize		*/
     32 #define	AHDI_BBLOCK	0		/* AHDI bootblock (root sector)	*/
     33 #define AHDI_MAXROOTS	(MAXAUXROOTS)	/* max. # of AHDI rootsectors	*/
     34 #define	AHDI_MAXPARTS	(AHDI_MAXROOTS+3) /* max. # of AHDI partitions	*/
     35 
     36 /*
     37  * Various `well known' AHDI partition identifiers.
     38  */
     39 #define AHDI_MKPID(x,y,z)	(   ((u_int32_t)(x) << 16)	\
     40 				  | ((u_int32_t)(y) << 8)	\
     41 				  | ((u_int32_t)(z))		\
     42 				)
     43 #define	AHDI_PID_XGM	AHDI_MKPID('X','G','M')
     44 #define	AHDI_PID_GEM	AHDI_MKPID('G','E','M')
     45 #define	AHDI_PID_BGM	AHDI_MKPID('B','G','M')
     46 #define	AHDI_PID_RAW	AHDI_MKPID('R','A','W')
     47 #define	AHDI_PID_SWP	AHDI_MKPID('S','W','P')
     48 #define	AHDI_PID_NBD	AHDI_MKPID('N','B','D')
     49 #define	AHDI_PID_NBR	AHDI_MKPID('N','B','R')
     50 #define	AHDI_PID_NBS	AHDI_MKPID('N','B','S')
     51 #define	AHDI_PID_NBU	AHDI_MKPID('N','B','U')
     52 
     53 /*
     54  * Format of AHDI boot block.
     55  */
     56 #define	AHDI_MAXRPD	4		/* max. # of partition descriptors */
     57 					/* in an AHDI bootblock (aka root) */
     58 #define	AHDI_MAXARPD	2		/* max. # of partition descriptors */
     59 					/* in an AHDI auxiliary root sector */
     60 struct ahdi_part {
     61 	u_int8_t	ap_flg;		/* bit 0 is in-use flag            */
     62 	u_int8_t	ap_id[3];	/* id: GEM, BGM, XGM, UNX, MIX     */
     63 	u_int32_t	ap_st;		/* block where partition starts    */
     64 	u_int32_t	ap_size;	/* partition size in blocks        */
     65 } __attribute__((__packed__));
     66 #define	ap_end	ap_size /* in the in-core copy, store end instead of size  */
     67 
     68 struct ahdi_root {
     69 	u_int8_t	 ar_fill[0x1c2];/* filler, can be boot code        */
     70 	u_int32_t	 ar_hdsize;	/* size of entire volume in blocks */
     71 	struct ahdi_part ar_parts[AHDI_MAXRPD]; /* root partition table    */
     72 	u_int32_t	 ar_bslst;	/* start of bad-sector list        */
     73 	u_int32_t	 ar_bslsize;	/* # of blocks in bad-sector list  */
     74 	u_int16_t	 ar_checksum;
     75 } __attribute__((__packed__));
     76 
     77 /*
     78  * AHDI partition table.
     79  */
     80 #ifdef _KERNEL
     81 struct ahdi_ptbl {
     82 	struct cpu_disklabel	*at_cdl;
     83 	u_int			at_hdsize;   /* size of volume in blocks   */
     84 	u_int			at_nroots;   /* # of auxiliary root sectors */
     85 	u_int			at_nparts;   /* # of AHDI partitions       */
     86 	struct ahdi_part	at_parts[AHDI_MAXPARTS];
     87 };
     88 #define at_bblock	at_cdl->cd_bblock
     89 #define at_label	at_cdl->cd_label
     90 #define at_bslst	at_cdl->cd_bslst
     91 #define at_bslend	at_cdl->cd_bslend
     92 #define at_roots	at_cdl->cd_roots
     93 #endif /* _KERNEL */
     94 
     95 #endif /* _MACHINE_AHDILABEL_H_ */
     96