1/*	$NetBSD: biosdisk_ll.h,v 1.16 2018/03/08 10:34:33 nonaka Exp $	 */
2
3/*
4 * Copyright (c) 1996
5 * 	Matthias Drochner.  All rights reserved.
6 * Copyright (c) 1996
7 * 	Perry E. Metzger.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgements:
19 *	This product includes software developed for the NetBSD Project
20 *	by Matthias Drochner.
21 *	This product includes software developed for the NetBSD Project
22 *	by Perry E. Metzger.
23 * 4. The names of the authors may not be used to endorse or promote products
24 *    derived from this software without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38/*
39 * shared by bootsector startup (bootsectmain) and biosdisk.c needs lowlevel
40 * parts from bios_disk.S
41 */
42
43/*
44 * Beware that bios_disk.S relies on the offsets of the structure
45 * members.
46 */
47struct biosdisk_ll {
48	int             dev;		/* BIOS device number */
49	int		type;		/* device type; see below */
50	int             sec, head, cyl;	/* geometry */
51	int		flags;		/* see below */
52	int		chs_sectors;	/* # of sectors addressable by CHS */
53	int		secsize;	/* bytes per sector */
54};
55#define	BIOSDISK_INT13EXT	1	/* BIOS supports int13 extension */
56
57#define BIOSDISK_TYPE_FD	0
58#define BIOSDISK_TYPE_HD	1
59#define BIOSDISK_TYPE_CD	2
60
61/*
62 * Version 1.x drive parameters from int13 extensions
63 * - should be supported by every BIOS that supports the extensions.
64 * Version 3.x parameters allow the drives to be matched properly
65 * - but are much less likely to be supported.
66 */
67
68struct biosdisk_extinfo {
69	uint16_t	size;		/* size of buffer, set on call */
70	uint16_t	flags;		/* flags, see below */
71	uint32_t	cyl;		/* # of physical cylinders */
72	uint32_t	head;		/* # of physical heads */
73	uint32_t	sec;		/* # of physical sectors per track */
74	uint64_t	totsec;		/* total number of sectors */
75	uint16_t	sbytes;		/* # of bytes per sector */
76#if defined(BIOSDISK_EXTINFO_V2) || defined(BIOSDISK_EXTINFO_V3)
77	/* v2.0 extensions */
78	uint32_t	edd_cfg;	/* EDD configuration parameters */
79#if defined(BIOSDISK_EXTINFO_V3)
80	/* v3.0 extensions */
81	uint16_t	devpath_sig;	/* 0xbedd if path info present */
82#define EXTINFO_DEVPATH_SIGNATURE	0xbedd
83	uint8_t		devpath_len;	/* length from devpath_sig */
84	uint8_t		fill21[3];
85	char		host_bus[4];	/* Probably "ISA" or "PCI" */
86	char		iface_type[8];	/* "ATA", "ATAPI", "SCSI" etc */
87	union {
88		uint8_t		ip_8[8];
89		uint16_t	ip_16[4];
90		uint32_t	ip_32[2];
91		uint64_t	ip_64[1];
92	} interface_path;
93#define	ip_isa_iobase	ip_16[0];	/* iobase for ISA bus */
94#define	ip_pci_bus	ip_8[0];	/* PCI bus number */
95#define	ip_pci_device	ip_8[1];	/* PCI device number */
96#define	ip_pci_function	ip_8[2];	/* PCI function number */
97	union {
98		uint8_t		dp_8[8];
99		uint16_t	dp_16[4];
100		uint32_t	dp_32[2];
101		uint64_t	dp_64[1];
102	} device_path;
103#define	dp_ata_slave	dp_8[0];
104#define	dp_atapi_slave	dp_8[0];
105#define	dp_atapi_lun	dp_8[1];
106#define	dp_scsi_lun	dp_8[0];
107#define	dp_firewire_guid dp_64[0];
108#define	dp_fibrechnl_wwn dp_64[0];
109	uint8_t		fill40[1];
110	uint8_t		checksum;	/* byte sum from dev_path_sig is 0 */
111#endif /* BIOSDISK_EXTINFO_V3 */
112#endif /* BIOSDISK_EXTINFO_V2 */
113} __packed;
114
115#define EXTINFO_DMA_TRANS	0x0001	/* transparent DMA boundary errors */
116#define EXTINFO_GEOM_VALID	0x0002	/* geometry in c/h/s in struct valid */
117#define EXTINFO_REMOVABLE	0x0004	/* removable device */
118#define EXTINFO_WRITEVERF	0x0008	/* supports write with verify */
119#define EXTINFO_CHANGELINE	0x0010	/* changeline support */
120#define EXTINFO_LOCKABLE	0x0020	/* device is lockable */
121#define EXTINFO_MAXGEOM		0x0040	/* geometry set to max; no media */
122
123#ifndef BIOSDISK_DEFAULT_SECSIZE
124#define BIOSDISK_DEFAULT_SECSIZE	512
125#endif
126
127int set_geometry(struct biosdisk_ll *, struct biosdisk_extinfo *);
128int readsects(struct biosdisk_ll *, daddr_t, int, char *, int);
129