117 lines
3.6 KiB
C
117 lines
3.6 KiB
C
/*
|
||
* 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>
|
||
|
||
/* 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_EZD 0x55
|
||
#define GRUB_PC_PARTITION_TYPE_MINIX 0x80
|
||
#define GRUB_PC_PARTITION_TYPE_LINUX_MINIX 0x81
|
||
#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;
|
||
} __attribute__ ((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;
|
||
} __attribute__ ((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);
|
||
}
|
||
|
||
#endif /* ! GRUB_PC_PARTITION_HEADER */
|