/* $NetBSD: biosdisk_ll.h,v 1.16 2018/03/08 10:34:33 nonaka Exp $ */
/*
* Copyright (c) 1996
* Matthias Drochner. All rights reserved.
* Copyright (c) 1996
* Perry E. Metzger. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgements:
* This product includes software developed for the NetBSD Project
* by Matthias Drochner.
* This product includes software developed for the NetBSD Project
* by Perry E. Metzger.
* 4. The names of the authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* shared by bootsector startup (bootsectmain) and biosdisk.c needs lowlevel
* parts from bios_disk.S
*/
/*
* Beware that bios_disk.S relies on the offsets of the structure
* members.
*/
struct biosdisk_ll {
int dev; /* BIOS device number */
int type; /* device type; see below */
int sec, head, cyl; /* geometry */
int flags; /* see below */
int chs_sectors; /* # of sectors addressable by CHS */
int secsize; /* bytes per sector */
};
#define BIOSDISK_INT13EXT 1 /* BIOS supports int13 extension */
#define BIOSDISK_TYPE_FD 0
#define BIOSDISK_TYPE_HD 1
#define BIOSDISK_TYPE_CD 2
/*
* Version 1.x drive parameters from int13 extensions
* - should be supported by every BIOS that supports the extensions.
* Version 3.x parameters allow the drives to be matched properly
* - but are much less likely to be supported.
*/
struct biosdisk_extinfo {
uint16_t size; /* size of buffer, set on call */
uint16_t flags; /* flags, see below */
uint32_t cyl; /* # of physical cylinders */
uint32_t head; /* # of physical heads */
uint32_t sec; /* # of physical sectors per track */
uint64_t totsec; /* total number of sectors */
uint16_t sbytes; /* # of bytes per sector */
#if defined(BIOSDISK_EXTINFO_V2) || defined(BIOSDISK_EXTINFO_V3)
/* v2.0 extensions */
uint32_t edd_cfg; /* EDD configuration parameters */
#if defined(BIOSDISK_EXTINFO_V3)
/* v3.0 extensions */
uint16_t devpath_sig; /* 0xbedd if path info present */
#define EXTINFO_DEVPATH_SIGNATURE 0xbedd
uint8_t devpath_len; /* length from devpath_sig */
uint8_t fill21[3];
char host_bus[4]; /* Probably "ISA" or "PCI" */
char iface_type[8]; /* "ATA", "ATAPI", "SCSI" etc */
union {
uint8_t ip_8[8];
uint16_t ip_16[4];
uint32_t ip_32[2];
uint64_t ip_64[1];
} interface_path;
#define ip_isa_iobase ip_16[0]; /* iobase for ISA bus */
#define ip_pci_bus ip_8[0]; /* PCI bus number */
#define ip_pci_device ip_8[1]; /* PCI device number */
#define ip_pci_function ip_8[2]; /* PCI function number */
union {
uint8_t dp_8[8];
uint16_t dp_16[4];
uint32_t dp_32[2];
uint64_t dp_64[1];
} device_path;
#define dp_ata_slave dp_8[0];
#define dp_atapi_slave dp_8[0];
#define dp_atapi_lun dp_8[1];
#define dp_scsi_lun dp_8[0];
#define dp_firewire_guid dp_64[0];
#define dp_fibrechnl_wwn dp_64[0];
uint8_t fill40[1];
uint8_t checksum; /* byte sum from dev_path_sig is 0 */
#endif /* BIOSDISK_EXTINFO_V3 */
#endif /* BIOSDISK_EXTINFO_V2 */
} __packed;
#define EXTINFO_DMA_TRANS 0x0001 /* transparent DMA boundary errors */
#define EXTINFO_GEOM_VALID 0x0002 /* geometry in c/h/s in struct valid */
#define EXTINFO_REMOVABLE 0x0004 /* removable device */
#define EXTINFO_WRITEVERF 0x0008 /* supports write with verify */
#define EXTINFO_CHANGELINE 0x0010 /* changeline support */
#define EXTINFO_LOCKABLE 0x0020 /* device is lockable */
#define EXTINFO_MAXGEOM 0x0040 /* geometry set to max; no media */
#ifndef BIOSDISK_DEFAULT_SECSIZE
#define BIOSDISK_DEFAULT_SECSIZE 512
#endif
int set_geometry(struct biosdisk_ll *, struct biosdisk_extinfo *);
int readsects(struct biosdisk_ll *, daddr_t, int, char *, int);