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biosdisk_ll.h revision 1.10 
      1 /*	$NetBSD: biosdisk_ll.h,v 1.10 2005/06/13 11:34:11 junyoung 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  */
     47 struct biosdisk_ll {
     48 	int             dev;		/* BIOS device number */
     49 	int             sec, head, cyl;	/* geometry */
     50 	int		flags;		/* see below */
     51 	int		chs_sectors;	/* # of sectors addressable by CHS */
     52 };
     53 #define	BIOSDISK_EXT13	1		/* BIOS supports int13 extension */
     54 
     55 /*
     56  * Version 1.x drive parameters from int13 extensions
     57  * - should be supported by every BIOS that supports the extensions.
     58  * Version 3.x parameters allow the drives to be matched properly
     59  * - but are much less likely to be supported.
     60  */
     61 
     62 struct biosdisk_ext13info {
     63 	uint16_t	size;		/* size of buffer, set on call */
     64 	uint16_t	flags;		/* flags, see below */
     65 	uint32_t	cyl;		/* # of physical cylinders */
     66 	uint32_t	head;		/* # of physical heads */
     67 	uint32_t	sec;		/* # of physical sectors per track */
     68 	uint64_t	totsec;		/* total number of sectors */
     69 	uint16_t	sbytes;		/* # of bytes per sector */
     70 #if defined(BIOSDISK_EXT13INFO_V2) || defined(BIOSDISK_EXT13INFO_V3)
     71 	/* v2.0 extensions */
     72 	uint32_t	edd_cfg;	/* EDD configuration parameters */
     73 #if defined(BIOSDISK_EXT13INFO_V3)
     74 	/* v3.0 extensions */
     75 	uint16_t	devpath_sig;	/* 0xbedd if path info present */
     76 #define EXT13_DEVPATH_SIGNATURE	0xbedd
     77 	uint8_t		devpath_len;	/* length from devpath_sig */
     78 	uint8_t		fill21[3];
     79 	char		host_bus[4];	/* Probably "ISA" or "PCI" */
     80 	char		iface_type[8];	/* "ATA", "ATAPI", "SCSI" etc */
     81 	union {
     82 		uint8_t		ip_8[8];
     83 		uint16_t	ip_16[4];
     84 		uint32_t	ip_32[2];
     85 		uint64_t	ip_64[1];
     86 	} interface_path;
     87 #define	ip_isa_iobase	ip_16[0];	/* iobase for ISA bus */
     88 #define	ip_pci_bus	ip_8[0];	/* PCI bus number */
     89 #define	ip_pci_device	ip_8[1];	/* PCI device number */
     90 #define	ip_pci_function	ip_8[2];	/* PCI function number */
     91 	union {
     92 		uint8_t		dp_8[8];
     93 		uint16_t	dp_16[4];
     94 		uint32_t	dp_32[2];
     95 		uint64_t	dp_64[1];
     96 	} device_path;
     97 #define	dp_ata_slave	dp_8[0];
     98 #define	dp_atapi_slave	dp_8[0];
     99 #define	dp_atapi_lun	dp_8[1];
    100 #define	dp_scsi_lun	dp_8[0];
    101 #define	dp_firewire_guid dp_64[0];
    102 #define	dp_fibrechnl_wwn dp_64[0];
    103 	uint8_t		fill40[1];
    104 	uint8_t		checksum;	/* byte sum from dev_path_sig is 0 */
    105 #endif /* BIOSDISK_EXT13INFO_V3 */
    106 #endif /* BIOSDISK_EXT13INFO_V2 */
    107 } __attribute__((packed));
    108 
    109 #define EXT13_DMA_TRANS		0x0001	/* transparent DMA boundary errors */
    110 #define EXT13_GEOM_VALID	0x0002	/* geometry in c/h/s in struct valid */
    111 #define EXT13_REMOVABLE		0x0004	/* removable device */
    112 #define EXT13_WRITEVERF		0x0008	/* supports write with verify */
    113 #define EXT13_CHANGELINE	0x0010	/* changeline support */
    114 #define EXT13_LOCKABLE		0x0020	/* device is lockable */
    115 #define EXT13_MAXGEOM		0x0040	/* geometry set to max; no media */
    116 
    117 #define BIOSDISK_SECSIZE 512
    118 
    119 int set_geometry(struct biosdisk_ll *, struct biosdisk_ext13info *);
    120 int readsects(struct biosdisk_ll *, daddr_t, int, char *, int);
    121