ide_part_table.h

来自「AMLOGIC DPF source code」· C头文件 代码 · 共 281 行

/*******************************************************************
 * 
 *  Copyright C 2005 by Amlogic, Inc. All Rights Reserved.
 *
 *  Description: 
 *
 *  Author: Amlogic Software
 *  Created: Fri Nov 11 01:07:14 2005
 *
 *******************************************************************/
/*****************************************************************************
 *
 * ide_part_table.h
 *
 * The header file for library supporting "MS-DOS-style" partition table
 *
 *
 * Copyright (C) 2002 OKTET Ltd., St.-Petersburg, Russia
 *
 * Author: Konstantin Abramenko <[e-mail]>
 *         Alexander Kukuta <[e-mail]>
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.avfs.com/license/LICENSE.
 *
 * ide_part_table.h,v 1.1.2.2 2003/09/04 18:46:53 joel Exp
 *
 *****************************************************************************/

#ifndef __AVFS_IDE_PART_TABLE_H__
#define __AVFS_IDE_PART_TABLE_H__
#if 0
//porting
#include <assert.h>
#include <chain.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <avfs.h>
#include <avfs/blkdev.h>
#include <avfs/libio.h>
#include <avfs/libio_.h>
#include <avfs/bdbuf.h>
#include <avfs/seterr.h>
#endif
/* Minor base number for all logical devices */
#define AVFS_IDE_SECTOR_BITS                             9
#define AVFS_IDE_SECTOR_SIZE                             512
#define AVFS_IDE_PARTITION_DESCRIPTOR_SIZE               16
#define AVFS_IDE_PARTITION_MAX_PARTITION_NUMBER          63
#define AVFS_IDE_PARTITION_MAX_SUB_PARTITION_NUMBER      4
#define AVFS_IDE_PARTITION_DEV_NAME_LENGTH_MAX           32

#define AVFS_IDE_PARTITION_MSDOS_SIGNATURE_DATA1         0x55
#define AVFS_IDE_PARTITION_MSDOS_SIGNATURE_DATA2         0xaa
#define AVFS_IDE_PARTITION_MSDOS_SIGNATURE_OFFSET        0x1fe
#define AVFS_IDE_PARTITION_TABLE_OFFSET                  0x1be
#define AVFS_IDE_PARTITION_BOOTABLE_OFFSET               0
#define AVFS_IDE_PARTITION_SYS_TYPE_OFFSET               4
#define AVFS_IDE_PARTITION_START_OFFSET                  8
#define AVFS_IDE_PARTITION_SIZE_OFFSET                   12

/*
 * Conversion from and to little-endian byte order. (no-op on i386/i486)
 */

#if (CPU_BIG_ENDIAN == TRUE)
#   define LE_TO_CPU_U16(v) CPU_swap_u16(v)
#   define LE_TO_CPU_U32(v) CPU_swap_u32(v)
#   define CPU_TO_LE_U16(v) CPU_swap_u16(v)
#   define CPU_TO_LE_U32(v) CPU_swap_u32(v)
#else
#   define LE_TO_CPU_U16(v) (v)
#   define LE_TO_CPU_U32(v) (v)
#   define CPU_TO_LE_U16(v) (v)
#   define CPU_TO_LE_U32(v) (v)
#endif


/*
 * sector_data_t --
 *      corresponds to the sector on the device
 */
typedef struct sector_data_s 
{
    unsigned32 sector_num; /* sector number on the device */
    unsigned8  data[0]; /* raw sector data */
} sector_data_t;


/*
 * Enum partition types
 * see list at http://ata-atapi.com/hiwtab.htm
 */
enum {
    EMPTY_PARTITION     = 0x00,
    DOS_FAT12_PARTITION = 0x01,
    DOS_FAT16_PARTITION = 0x04,
    EXTENDED_PARTITION  = 0x05,
    DOS_P32MB_PARTITION = 0x06,
    NTFS_OR_HPFS_PART    = 0x07,
    FAT32_PARTITION     = 0x0B,
    FAT32_LBA_PARTITION = 0x0C,
    FAT16_LBA_PARTITION = 0x0E,
    DM6_PARTITION       = 0x54,
    EZD_PARTITION       = 0x55,
    DM6_AUX1PARTITION   = 0x51,
    DM6_AUX3PARTITION   = 0x53,
    LINUX_SWAP          = 0x82,
    LINUX_NATIVE        = 0x83,
    LINUX_EXTENDED      = 0x85
#if 1
//added by rain
    ,
    WIN95_EXTENDED      = 0x0f

#endif    
};
#if 0  //Added by Andrew  more partition table
Values for operating system indicator:
 00h	empty
 01h	DOS 12-bit FAT
 02h	XENIX root file system
 03h	XENIX /usr file system (obsolete)
 04h	DOS 16-bit FAT (up to 32M)
 05h	DOS 3.3+ extended partition
 06h	DOS 3.31+ Large File System (16-bit FAT, over 32M)
 07h	QNX
 07h	OS/2 HPFS
 07h	Windows NT NTFS
 07h	Advanced Unix
 08h	AIX bootable partition, SplitDrive
 09h	AIX data partition
 09h	Coherent filesystem
 0Ah	OS/2 Boot Manager
 0Ah	OPUS
 0Ah	Coherent swap partition
 10h	OPUS
 11h	OS/2 Boot Manager hidden 12-bit FAT partition
 12h	Compaq Diagnostics partition
 14h	(resulted from using Novell DOS 7.0 FDISK to delete Linux Native part)
 14h	OS/2 Boot Manager hidden sub-32M 16-bit FAT partition
 16h	OS/2 Boot Manager hidden over-32M 16-bit FAT partition
 17h	OS/2 Boot Manager hidden HPFS partition
 18h	AST special Windows swap file
 24h	NEC MS-DOS 3.x
 3Ch	PowerQuest PartitionMagic recovery partition
 40h	VENIX 80286
 42h	SFS (Secure File System) by Peter Gutmann
 50h	Disk Manager, read-only partition
 51h	Disk Manager, read/write partition
 51h	Novell???
 52h	CP/M
 52h	Microport System V/386
 56h	GoldenBow VFeature
 61h	SpeedStor
 63h	Unix SysV/386, 386/ix
 63h	Mach, MtXinu BSD 4.3 on Mach
 63h	GNU HURD
 64h	Novell NetWare
 65h	Novell NetWare (3.11)
 70h	DiskSecure Multi-Boot
 75h	PC/IX
 80h	Minix v1.1 - 1.4a
 81h	Minix v1.4b+
 81h	Linux
 81h	Mitac Advanced Disk Manager
 82h	Linux Swap partition
 83h	Linux native file system (ext2fs/xiafs)
 84h	OS/2-renumbered type 04h partition (related to hiding DOS C: drive)
 93h	Amoeba file system
 94h	Amoeba bad block table
 A5h	FreeBSD
 B7h	BSDI file system (secondarily swap)
 B8h	BSDI swap partition (secondarily file system)
 C1h	DR-DOS 6.0 LOGIN.EXE-secured 12-bit FAT partition
 C4h	DR-DOS 6.0 LOGIN.EXE-secured 16-bit FAT partition
 C6h	DR-DOS 6.0 LOGIN.EXE-secured Huge partition
 C7h	Cyrnix Boot
 DBh	CP/M, Concurrent CP/M, Concurrent DOS
 DBh	CTOS (Convergent Technologies OS)
 E1h	SpeedStor 12-bit FAT extended partition
 E4h	SpeedStor 16-bit FAT extended partition
 F2h	DOS 3.3+ secondary
 F4h	SpeedStor
 FEh	LANstep
 FFh	Xenix bad block table
#endif

/* Forward declaration */
struct disk_desc_s;

/*
 * part_desc_t --
 *      contains all neccessary information about partition
 */
typedef struct part_desc_s {
    unsigned8           bootable; /* is the partition active */
    unsigned8           sys_type; /* type of partition */
    unsigned8           log_id; /* logical number of partition */
    unsigned32          start; /* first partition sector, in absolute numeration */
    unsigned32          size; /* size in sectors */
    unsigned32          end; /* last partition sector, end = start + size - 1 */
    struct disk_desc_s *disk_desc; /* descriptor of disk, partition contains in */
    struct part_desc_s *ext_part; /* extended partition containing this one */

    /* partitions, containing in this one */
    struct part_desc_s *sub_part[AVFS_IDE_PARTITION_MAX_SUB_PARTITION_NUMBER];
} part_desc_t;



typedef struct disk_desc_s {
    dev_t        dev; /* device number */

    /* device name in /dev filesystem */
    unsigned8    dev_name[AVFS_IDE_PARTITION_DEV_NAME_LENGTH_MAX];

    unsigned32   sector_size; /* size of sector */
    unsigned32   sector_bits; /* the base-2 logarithm of sector_size */
    unsigned32   lba_size; /* total amount of sectors in lba address mode */
    int          last_log_id; /* used for logical disks enumerating */

    /* primary partition descriptors */
    part_desc_t *partitions[AVFS_IDE_PARTITION_MAX_PARTITION_NUMBER];
} disk_desc_t;


/*
 * avfs_ide_part_table_free --
 *      frees disk descriptor structure
 *
 * PARAMETERS:
 *      disk_desc - disc descriptor structure to free
 *
 * RETURNS:
 *      N/A
 */
void
avfs_ide_part_table_free(disk_desc_t *disk_desc);


/*
 * avfs_ide_part_table_get --
 *      reads partition table structure from the device
 *      and creates disk description structure
 *
 * PARAMETERS:
 *      dev_name  - path to physical device in /dev filesystem
 *      disk_desc - returned disc description structure
 *
 * RETURNS:
 *      AVFS_SUCCESSFUL if success, or -1 and corresponding errno else
 */
avfs_status_code
avfs_ide_part_table_get(const char *dev_name, disk_desc_t *disk_desc);


/*
 * avfs_ide_part_table_initialize --
 *      initializes logical devices on the physical IDE drive
 *
 * PARAMETERS:
 *      dev_name - path to physical device in /dev filesystem
 *
 * RETURNS:
 *      AVFS_SUCCESSFUL if success, or -1 and corresponding errno else
 */
avfs_status_code
avfs_ide_part_table_initialize(char *dev_name);


#endif /* __AVFS_IDE_PART_TABLE_H__ */