76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1999,2000,2001,2002,2004,2007 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 MSDOS_PARTITION_H
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#define MSDOS_PARTITION_H 1
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#include <stdint.h>
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/* The signature. */
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#define MSDOS_PARTITION_SIGNATURE ((0xaa << 8) | 0x55)
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/* This is not a flag actually, but used as if it were a flag. */
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#define MSDOS_PARTITION_TYPE_HIDDEN_FLAG 0x10
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/* The partition entry. */
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struct msdos_partition_entry
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{
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/* If active, 0x80, otherwise, 0x00. */
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uint8_t flag;
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/* The head of the start. */
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uint8_t start_head;
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/* (S | ((C >> 2) & 0xC0)) where S is the sector of the start and C
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is the cylinder of the start. Note that S is counted from one. */
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uint8_t start_sector;
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/* (C & 0xFF) where C is the cylinder of the start. */
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uint8_t start_cylinder;
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/* The partition type. */
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uint8_t type;
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/* The end versions of start_head, start_sector and start_cylinder,
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respectively. */
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uint8_t end_head;
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uint8_t end_sector;
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uint8_t end_cylinder;
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/* The start sector. Note that this is counted from zero. */
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uint32_t start;
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/* The length in sector units. */
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uint32_t length;
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} __attribute__ ((packed));
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/* The structure of MBR. */
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struct msdos_partition_mbr
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{
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/* The code area (actually, including BPB). */
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uint8_t code[446];
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/* Four partition entries. */
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struct msdos_partition_entry entries[4];
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/* The signature 0xaa55. */
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uint16_t signature;
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} __attribute__ ((packed));
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#endif
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