disk/part_mac.h

   1 /* SPDX-License-Identifier: GPL-2.0+ */
   2 /*
   3  * (C) Copyright 2000
   4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   5  */
   6
   7 /*
   8  * See also Linux sources, fs/partitions/mac.h
   9  *
  10  * This file describes structures and values related to the standard
  11  * Apple SCSI disk partitioning scheme. For more information see:
  12  * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
  13  */
  14
  15 #ifndef _DISK_PART_MAC_H
  16 #define _DISK_PART_MAC_H
  17
  18 #define MAC_DRIVER_MAGIC        0x4552
  19
  20 /*
  21  * Driver Descriptor Structure, in block 0.
  22  * This block is (and shall remain) 512 bytes long.
  23  * Note that there is an alignment problem for the driver descriptor map!
  24  */
  25 typedef struct mac_driver_desc {
  26         __u16   signature;      /* expected to be MAC_DRIVER_MAGIC      */
  27         __u16   blk_size;       /* block size of device                 */
  28         __u32   blk_count;      /* number of blocks on device           */
  29         __u16   dev_type;       /* device type                          */
  30         __u16   dev_id;         /* device id                            */
  31         __u32   data;           /* reserved                             */
  32         __u16   drvr_cnt;       /* number of driver descriptor entries  */
  33         __u16   drvr_map[247];  /* driver descriptor map                */
  34 } mac_driver_desc_t;
  35
  36 /*
  37  * Device Driver Entry
  38  * (Cannot be included in mac_driver_desc because of alignment problems)
  39  */
  40 typedef struct mac_driver_entry {
  41         __u32   block;          /* block number of starting block       */
  42         __u16   size;           /* size of driver, in 512 byte blocks   */
  43         __u16   type;           /* OS Type                              */
  44 } mac_driver_entry_t;
  45
  46
  47 #define MAC_PARTITION_MAGIC     0x504d
  48
  49 /* type field value for A/UX or other Unix partitions */
  50 #define APPLE_AUX_TYPE  "Apple_UNIX_SVR2"
  51
  52 /*
  53  * Each Partition Map entry (in blocks 1 ... N) has this format:
  54  */
  55 typedef struct mac_partition {
  56         __u16   signature;      /* expected to be MAC_PARTITION_MAGIC   */
  57         __u16   sig_pad;        /* reserved                             */
  58         __u32   map_count;      /* # blocks in partition map            */
  59         __u32   start_block;    /* abs. starting block # of partition   */
  60         __u32   block_count;    /* number of blocks in partition        */
  61         uchar   name[32];       /* partition name                       */
  62         uchar   type[32];       /* string type description              */
  63         __u32   data_start;     /* rel block # of first data block      */
  64         __u32   data_count;     /* number of data blocks                */
  65         __u32   status;         /* partition status bits                */
  66         __u32   boot_start;     /* first block of boot code             */
  67         __u32   boot_size;      /* size of boot code, in bytes          */
  68         __u32   boot_load;      /* boot code load address               */
  69         __u32   boot_load2;     /* reserved                             */
  70         __u32   boot_entry;     /* boot code entry point                */
  71         __u32   boot_entry2;    /* reserved                             */
  72         __u32   boot_cksum;     /* boot code checksum                   */
  73         uchar   processor[16];  /* Type of Processor                    */
  74         __u16   part_pad[188];  /* reserved                             */
  75 #if CONFIG_IS_ENABLED(ISO_PARTITION)
  76         uchar   iso_dummy[2048];/* Reservere enough room for an ISO partition block to fit */
  77 #endif
  78 } mac_partition_t;
  79
  80 #define MAC_STATUS_BOOTABLE     8       /* partition is bootable */
  81
  82 #endif  /* _DISK_PART_MAC_H */