Add comments for enumeration, structure data members those are referred by UefiService, Runtime Service, Dxe Service and Pei Service.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6974 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Include/Uefi/UefiGpt.h

@@ -32,15 +32,53 @@
 /// GPT Partition Table Header
 ///
 typedef struct {
+  ///
+  /// The table header for the GPT partition Table.
+  /// This header contains EFI_PTAB_HEADER_ID
+  ///
   EFI_TABLE_HEADER  Header;
+  ///
+  /// The LBA that contains this data structure.
+  ///
   EFI_LBA           MyLBA;
+  ///
+  /// LBA address of the alternate GUID Partition Table Header.
+  ///
   EFI_LBA           AlternateLBA;
+  ///
+  /// The first usable logical block that may be used
+  /// by a partition described by a GUID Partition Entry.
+  ///
   EFI_LBA           FirstUsableLBA;
+  ///
+  /// The last usable logical block that may be used
+  /// by a partition described by a GUID Partition Entry.
+  ///
   EFI_LBA           LastUsableLBA;
+  ///
+  /// GUID that can be used to uniquely identify the disk.
+  ///
   EFI_GUID          DiskGUID;
+  ///
+  /// The starting LBA of the GUID Partition Entry array.
+  ///
   EFI_LBA           PartitionEntryLBA;
+  ///
+  /// The number of Partition Entries in the GUID Partition Entry array.
+  ///
   UINT32            NumberOfPartitionEntries;
+  ///
+  /// The size, in bytes, of each the GUID Partition
+  /// Entry structures in the GUID Partition Entry
+  /// array. Must be a multiple of 8.
+  ///
   UINT32            SizeOfPartitionEntry;
+  ///
+  /// The CRC32 of the GUID Partition Entry array.
+  /// Starts at PartitionEntryLBA and is
+  /// computed over a byte length of
+  /// NumberOfPartitionEntries * SizeOfPartitionEntry.
+  ///
   UINT32            PartitionEntryArrayCRC32;
 } EFI_PARTITION_TABLE_HEADER;
 
@@ -48,11 +86,35 @@ typedef struct {
 /// GPT Partition Entry
 ///
 typedef struct {
+  ///
+  /// Unique ID that defines the purpose and type of this Partition. A value of
+  /// zero defines that this partition entry is not being used.
+  ///
   EFI_GUID  PartitionTypeGUID;
+  ///
+  /// GUID that is unique for every partition entry. Every partition ever
+  /// created will have a unique GUID.
+  /// This GUID must be assigned when the GUID Partition Entry is created.
+  ///
   EFI_GUID  UniquePartitionGUID;
+  ///
+  /// Starting LBA of the partition defined by this entry
+  ///
   EFI_LBA   StartingLBA;
+  ///
+  /// Ending LBA of the partition defined by this entry.
+  ///
   EFI_LBA   EndingLBA;
+  ///
+  /// Attribute bits, all bits reserved by UEFI
+  /// Bit 0 Required for the platform to function.
+  /// Bits 1-47 Undefined and must be zero.
+  /// Bits 48-63 Reserved for GUID specific use.
+  ///
   UINT64    Attributes;
+  ///
+  /// Unicode string.
+  ///
   CHAR16    PartitionName[36];
 } EFI_PARTITION_ENTRY;