99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2002,2005,2007 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_BIOSDISK_MACHINE_HEADER
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#define GRUB_BIOSDISK_MACHINE_HEADER 1
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#include <grub/symbol.h>
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#include <grub/types.h>
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#define GRUB_BIOSDISK_FLAG_LBA 1
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struct grub_biosdisk_data
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{
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int drive;
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unsigned long cylinders;
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unsigned long heads;
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unsigned long sectors;
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unsigned long flags;
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};
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/* Drive Parameters. */
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struct grub_biosdisk_drp
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{
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grub_uint16_t size;
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grub_uint16_t flags;
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grub_uint32_t cylinders;
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grub_uint32_t heads;
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grub_uint32_t sectors;
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grub_uint64_t total_sectors;
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grub_uint16_t bytes_per_sector;
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/* ver 2.0 or higher */
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union
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{
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grub_uint32_t EDD_configuration_parameters;
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/* Pointer to the Device Parameter Table Extension (ver 3.0+). */
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grub_uint32_t dpte_pointer;
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};
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/* ver 3.0 or higher */
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grub_uint16_t signature_dpi;
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grub_uint8_t length_dpi;
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grub_uint8_t reserved[3];
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grub_uint8_t name_of_host_bus[4];
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grub_uint8_t name_of_interface_type[8];
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grub_uint8_t interface_path[8];
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grub_uint8_t device_path[8];
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grub_uint8_t reserved2;
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grub_uint8_t checksum;
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/* XXX: This is necessary, because the BIOS of Thinkpad X20
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writes a garbage to the tail of drive parameters,
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regardless of a size specified in a caller. */
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grub_uint8_t dummy[16];
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} __attribute__ ((packed));
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/* Disk Address Packet. */
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struct grub_biosdisk_dap
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{
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grub_uint8_t length;
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grub_uint8_t reserved;
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grub_uint16_t blocks;
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grub_uint32_t buffer;
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grub_uint64_t block;
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} __attribute__ ((packed));
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int EXPORT_FUNC(grub_biosdisk_rw_int13_extensions) (int ah, int drive, void *dap);
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int EXPORT_FUNC(grub_biosdisk_rw_standard) (int ah, int drive, int coff, int hoff,
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int soff, int nsec, int segment);
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int EXPORT_FUNC(grub_biosdisk_check_int13_extensions) (int drive);
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int EXPORT_FUNC(grub_biosdisk_get_diskinfo_int13_extensions) (int drive,
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void *drp);
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int EXPORT_FUNC(grub_biosdisk_get_diskinfo_standard) (int drive,
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unsigned long *cylinders,
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unsigned long *heads,
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unsigned long *sectors);
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int EXPORT_FUNC(grub_biosdisk_get_num_floppies) (void);
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void grub_biosdisk_init (void);
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void grub_biosdisk_fini (void);
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#endif /* ! GRUB_BIOSDISK_MACHINE_HEADER */
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