platform/msm_shared/include/partition_parser.h

/* Copyright (c) 2011, Code Aurora Forum. All rights reserved.

 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above
 *     copyright notice, this list of conditions and the following
 *     disclaimer in the documentation and/or other materials provided
 *     with the distribution.
 *   * Neither the name of Code Aurora Forum, Inc. nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#define INVALID_PTN               -1

#define PARTITION_TYPE_MBR         0
#define PARTITION_TYPE_GPT         1
#define PARTITION_TYPE_GPT_BACKUP  2

/* GPT Signature should be 0x5452415020494645 */
#define GPT_SIGNATURE_1 0x54524150
#define GPT_SIGNATURE_2 0x20494645

#define MMC_MBR_SIGNATURE_BYTE_0  0x55
#define MMC_MBR_SIGNATURE_BYTE_1  0xAA

/* GPT Offsets */
#define PROTECTIVE_MBR_SIZE       BLOCK_SIZE
#define PARTITION_TABLE_SIZE      BLOCK_SIZE
#define PARTITION_ENTRY_SIZE      BLOCK_SIZE
#define HEADER_SIZE_OFFSET        12
#define HEADER_CRC_OFFSET         16
#define BACKUP_HEADER_OFFSET      32
#define FIRST_USABLE_LBA_OFFSET   40
#define LAST_USABLE_LBA_OFFSET    48
#define PARTITION_ENTRIES_OFFSET  72
#define PARTITION_COUNT_OFFSET    80
#define PENTRY_SIZE_OFFSET        84
#define PARTITION_CRC_OFFSET      88

#define UNIQUE_GUID_OFFSET        16
#define FIRST_LBA_OFFSET          32
#define LAST_LBA_OFFSET           40
#define ATTRIBUTE_FLAG_OFFSET     48
#define PARTITION_NAME_OFFSET     56

#define MAX_GPT_NAME_SIZE          72
#define PARTITION_TYPE_GUID_SIZE   16
#define UNIQUE_PARTITION_GUID_SIZE 16
#define NUM_PARTITIONS             32

/* Some useful define used to access the MBR/EBR table */
#define BLOCK_SIZE                0x200
#define TABLE_ENTRY_0             0x1BE
#define TABLE_ENTRY_1             0x1CE
#define TABLE_ENTRY_2             0x1DE
#define TABLE_ENTRY_3             0x1EE
#define TABLE_SIGNATURE           0x1FE
#define TABLE_ENTRY_SIZE          0x010

#define OFFSET_STATUS             0x00
#define OFFSET_TYPE               0x04
#define OFFSET_FIRST_SEC          0x08
#define OFFSET_SIZE               0x0C
#define COPYBUFF_SIZE             (1024 * 16)
#define BINARY_IN_TABLE_SIZE      (16 * 512)
#define MAX_FILE_ENTRIES          20

#define MBR_EBR_TYPE              0x05
#define MBR_MODEM_TYPE            0x06
#define MBR_MODEM_TYPE2           0x0C
#define MBR_SBL1_TYPE             0x4D
#define MBR_SBL2_TYPE             0x51
#define MBR_SBL3_TYPE             0x45
#define MBR_RPM_TYPE              0x47
#define MBR_TZ_TYPE               0x46
#define MBR_MODEM_ST1_TYPE        0x4A
#define MBR_MODEM_ST2_TYPE        0x4B
#define MBR_EFS2_TYPE             0x4E

#define MBR_ABOOT_TYPE            0x4C
#define MBR_BOOT_TYPE             0x48
#define MBR_SYSTEM_TYPE           0x82
#define MBR_USERDATA_TYPE         0x83
#define MBR_RECOVERY_TYPE         0x60
#define MBR_MISC_TYPE             0x63
#define MBR_PROTECTED_TYPE        0xEE

#define GET_LLWORD_FROM_BYTE(x)    ((unsigned long long)*(x) | \
        ((unsigned long long)*(x+1) << 8) | \
        ((unsigned long long)*(x+2) << 16) | \
        ((unsigned long long)*(x+3) << 24) | \
        ((unsigned long long)*(x+4) << 32) | \
        ((unsigned long long)*(x+5) << 40) | \
        ((unsigned long long)*(x+6) << 48) | \
        ((unsigned long long)*(x+7) << 56))

/* Unified mbr and gpt entry types */
struct partition_entry
{
    unsigned char type_guid[PARTITION_TYPE_GUID_SIZE];
    unsigned dtype;
    unsigned char unique_partition_guid[UNIQUE_PARTITION_GUID_SIZE];
    unsigned long long first_lba;
    unsigned long long last_lba;
    unsigned long long size;
    unsigned long long attribute_flag;
    unsigned char name[MAX_GPT_NAME_SIZE];
};

static void mbr_fill_name (struct partition_entry *partition_ent, unsigned int type);
unsigned int mmc_boot_read_gpt(  struct mmc_boot_host * mmc_host,
                                 struct mmc_boot_card * mmc_card);
unsigned int mmc_boot_read_mbr(  struct mmc_boot_host * mmc_host,
                                 struct mmc_boot_card * mmc_card);
unsigned partition_get_index (const char * name);
unsigned long long partition_get_size (int index);
unsigned long long partition_get_offset (int index);
unsigned int partition_verify_mbr_signature(unsigned size, unsigned char* buffer);
unsigned int mbr_partition_get_type(unsigned size, unsigned char* partition,
                                    unsigned int *partition_type);
unsigned int partition_get_type(unsigned size, unsigned char* partition,
                                unsigned int *partition_type);
unsigned int partition_read_table( struct mmc_boot_host * mmc_host,
                                   struct mmc_boot_card * mmc_card);
unsigned int partition_parse_gpt_header(unsigned char * buffer,
                                        unsigned long long * first_usable_lba,
                                        unsigned long * partition_entry_size,
                                        unsigned long * header_size,
                                        unsigned int * max_partition_count);

/* For Debugging */
void partition_dump(void);