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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 1999,2000,2001,2002,2004,2007 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GRUB_PC_PARTITION_HEADER
#define GRUB_PC_PARTITION_HEADER 1
#include <grub/symbol.h>
#include <grub/types.h>
#include <grub/err.h>
#include <grub/disk.h>
#include <grub/partition.h>
/* The signature. */
#define GRUB_PC_PARTITION_SIGNATURE 0xaa55
/* This is not a flag actually, but used as if it were a flag. */
#define GRUB_PC_PARTITION_TYPE_HIDDEN_FLAG 0x10
/* DOS partition types. */
#define GRUB_PC_PARTITION_TYPE_NONE 0
#define GRUB_PC_PARTITION_TYPE_FAT12 1
#define GRUB_PC_PARTITION_TYPE_FAT16_LT32M 4
#define GRUB_PC_PARTITION_TYPE_EXTENDED 5
#define GRUB_PC_PARTITION_TYPE_FAT16_GT32M 6
#define GRUB_PC_PARTITION_TYPE_NTFS 7
#define GRUB_PC_PARTITION_TYPE_FAT32 0xb
#define GRUB_PC_PARTITION_TYPE_FAT32_LBA 0xc
#define GRUB_PC_PARTITION_TYPE_FAT16_LBA 0xe
#define GRUB_PC_PARTITION_TYPE_WIN95_EXTENDED 0xf
#define GRUB_PC_PARTITION_TYPE_PLAN9 0x39
#define GRUB_PC_PARTITION_TYPE_LDM 0x42
#define GRUB_PC_PARTITION_TYPE_EZD 0x55
#define GRUB_PC_PARTITION_TYPE_MINIX 0x80
#define GRUB_PC_PARTITION_TYPE_LINUX_MINIX 0x81
#define GRUB_PC_PARTITION_TYPE_LINUX_SWAP 0x82
#define GRUB_PC_PARTITION_TYPE_EXT2FS 0x83
#define GRUB_PC_PARTITION_TYPE_LINUX_EXTENDED 0x85
#define GRUB_PC_PARTITION_TYPE_VSTAFS 0x9e
#define GRUB_PC_PARTITION_TYPE_FREEBSD 0xa5
#define GRUB_PC_PARTITION_TYPE_OPENBSD 0xa6
#define GRUB_PC_PARTITION_TYPE_NETBSD 0xa9
#define GRUB_PC_PARTITION_TYPE_HFS 0xaf
#define GRUB_PC_PARTITION_TYPE_GPT_DISK 0xee
#define GRUB_PC_PARTITION_TYPE_LINUX_RAID 0xfd
/* The partition entry. */
struct grub_msdos_partition_entry
{
/* If active, 0x80, otherwise, 0x00. */
grub_uint8_t flag;
/* The head of the start. */
grub_uint8_t start_head;
/* (S | ((C >> 2) & 0xC0)) where S is the sector of the start and C
is the cylinder of the start. Note that S is counted from one. */
grub_uint8_t start_sector;
/* (C & 0xFF) where C is the cylinder of the start. */
grub_uint8_t start_cylinder;
/* The partition type. */
grub_uint8_t type;
/* The end versions of start_head, start_sector and start_cylinder,
respectively. */
grub_uint8_t end_head;
grub_uint8_t end_sector;
grub_uint8_t end_cylinder;
/* The start sector. Note that this is counted from zero. */
grub_uint32_t start;
/* The length in sector units. */
grub_uint32_t length;
} GRUB_PACKED;
/* The structure of MBR. */
struct grub_msdos_partition_mbr
{
/* The code area (actually, including BPB). */
grub_uint8_t code[446];
/* Four partition entries. */
struct grub_msdos_partition_entry entries[4];
/* The signature 0xaa55. */
grub_uint16_t signature;
} GRUB_PACKED;
static inline int
grub_msdos_partition_is_empty (int type)
{
return (type == GRUB_PC_PARTITION_TYPE_NONE);
}
static inline int
grub_msdos_partition_is_extended (int type)
{
return (type == GRUB_PC_PARTITION_TYPE_EXTENDED
|| type == GRUB_PC_PARTITION_TYPE_WIN95_EXTENDED
|| type == GRUB_PC_PARTITION_TYPE_LINUX_EXTENDED);
}
grub_err_t
grub_partition_msdos_iterate (grub_disk_t disk,
grub_partition_iterate_hook_t hook,
void *hook_data);
#endif /* ! GRUB_PC_PARTITION_HEADER */
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