src/add-ons/kernel/partitioning_systems/apple/apple.h

   1 /*
   2 ** Copyright 2003, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
   3 ** Distributed under the terms of the MIT License.
   4 */
   5 #ifndef APPLE_H
   6 #define APPLE_H
   7
   8
   9 #include "SupportDefs.h"
  10 #include "ByteOrder.h"
  11
  12
  13 enum apple_signature {
  14         kDriverDescriptorSignature              = 'ER',
  15         kPartitionMapSignature                  = 'PM',
  16         kObsoletePartitionMapSignature  = 'TS',
  17 };
  18
  19
  20 struct apple_driver_descriptor {
  21         int16   signature;
  22         int16   block_size;
  23         int32   block_count;
  24         int16   type;                           // reserved
  25         int16   id;                                     // "
  26         int32   data;                           // "
  27         int16   descriptor_count;
  28         int32   driver_block;
  29         int16   driver_size;
  30         int16   os_type;                        // operating system type
  31
  32         int16 BlockSize() { return B_BENDIAN_TO_HOST_INT16(block_size); }
  33         int32 BlockCount() { return B_BENDIAN_TO_HOST_INT32(block_count); }
  34
  35         bool HasValidSignature() { return B_BENDIAN_TO_HOST_INT16(signature) == kDriverDescriptorSignature; }
  36 };
  37
  38 struct apple_partition_map {
  39         int16   signature;
  40         int16   _reserved0;
  41         int32   map_block_count;
  42         int32   start;                          // in blocks
  43         int32   size;
  44         char    name[32];
  45         char    type[32];
  46         int32   data_start;                     // in blocks
  47         int32   data_size;
  48         int32   status;
  49         int32   boot_start;
  50         int32   boot_size;
  51         int32   boot_address;
  52         int32   _reserved1;
  53         int32   boot_entry;
  54         int32   _reserved2;
  55         int32   boot_code_checksum;
  56         char    processor_type[16];
  57
  58         int32 StartBlock() { return B_BENDIAN_TO_HOST_INT32(start); }
  59         int32 BlockCount() { return B_BENDIAN_TO_HOST_INT32(size); }
  60         uint64 Start(apple_driver_descriptor &descriptor) { return StartBlock() * descriptor.BlockSize(); }
  61         uint64 Size(apple_driver_descriptor &descriptor) { return BlockCount() * descriptor.BlockSize(); }
  62
  63         bool HasValidSignature();
  64 };
  65
  66
  67 inline bool
  68 apple_partition_map::HasValidSignature()
  69 {
  70         int16 sig = B_BENDIAN_TO_HOST_INT16(signature);
  71
  72         return sig == kPartitionMapSignature
  73                 || sig == kObsoletePartitionMapSignature;
  74 }
  75
  76
  77 enum partition_status {
  78         kPartitionIsValid                               = 0x00000001,
  79     kPartitionIsAllocated                       = 0x00000002,
  80     kPartitionIsInUse                           = 0x00000004,
  81     kPartitionIsBootValid                       = 0x00000008,
  82     kPartitionIsReadable                        = 0x00000010,
  83     kPartitionAUXIsWriteable            = 0x00000020,   // dunno why IsWriteable is here twice...
  84     kPartitionIsBootPIC                         = 0x00000040,
  85     kPartitionIsWriteable                       = 0x00000020,
  86     kPartitionIsMounted                         = 0x40000000,
  87     kPartitionIsStartup                         = 0x80000000,
  88     kPartitionIsChainCompatible         = 0x00000100,
  89     kPartitionIsRealDeviceDriver        = 0x00000200,
  90     kPartitionCanChainToNext            = 0x00000400,
  91 };
  92
  93 #endif  /* APPLE_H */