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Diffstat (limited to 'include/grub/msdos_partition.h')
| -rw-r--r-- | include/grub/msdos_partition.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/include/grub/msdos_partition.h b/include/grub/msdos_partition.h new file mode 100644 index 0000000..fdc2904 --- /dev/null +++ b/include/grub/msdos_partition.h @@ -0,0 +1,127 @@ +/* + * 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 */ |