platform/msm_shared/include/partition_parser.h

/* Copyright (c) 2011-2014, The Linux Foundation. All rights reserved.

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 * modification, are permitted provided that the following conditions are
 * met:
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 *     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.
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 *     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
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 */

#ifndef __PARTITION_PARSER_H
#define __PARTITION_PARSER_H

#include <mmc.h>

#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 HEADER_SIZE_OFFSET        12
#define HEADER_CRC_OFFSET         16
#define PRIMARY_HEADER_OFFSET     24
#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 MIN_PARTITION_ARRAY_SIZE  0x4000

#define PARTITION_ENTRY_LAST_LBA  40

#define ENTRY_SIZE              0x080

#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             128

/* 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 MBR_SSD_TYPE              0x5D

#define GET_LWORD_FROM_BYTE(x)    ((unsigned)*(x) | \
        ((unsigned)*(x+1) << 8) | \
        ((unsigned)*(x+2) << 16) | \
        ((unsigned)*(x+3) << 24))

#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))

#define GET_LONG(x)    ((uint32_t)*(x) | \
            ((uint32_t)*(x+1) << 8) | \
            ((uint32_t)*(x+2) << 16) | \
            ((uint32_t)*(x+3) << 24))

#define PUT_LONG(x, y)   *(x) = y & 0xff;     \
    *(x+1) = (y >> 8) & 0xff;     \
    *(x+2) = (y >> 16) & 0xff;    \
    *(x+3) = (y >> 24) & 0xff;

#define PUT_LONG_LONG(x,y)    *(x) =(y) & 0xff; \
     *((x)+1) = (((y) >> 8) & 0xff);    \
     *((x)+2) = (((y) >> 16) & 0xff);   \
     *((x)+3) = (((y) >> 24) & 0xff);   \
     *((x)+4) = (((y) >> 32) & 0xff);   \
     *((x)+5) = (((y) >> 40) & 0xff);   \
     *((x)+6) = (((y) >> 48) & 0xff);   \
     *((x)+7) = (((y) >> 56) & 0xff);

/* 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];
	uint8_t lun;
};

int partition_get_index(const char *name);
unsigned long long partition_get_size(int index);
unsigned long long partition_get_offset(int index);
uint8_t partition_get_lun(int index);
unsigned int partition_read_table();
unsigned int write_partition(unsigned size, unsigned char *partition);
bool partition_gpt_exists();

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

#endif