xref: /netbsd-src/sys/arch/atari/include/ahdilabel.h (revision 4988388746341ac3fc72e21abd79958515e8ad78)
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