EFI Shell commands -- DH(顯示EFI操作管理資訊)

Displays EFI handle information.

DH [-l lang] [handle | -p prot_id] [-d] [-v]


    handle   - Handle number in hexadecimal format
    -p       - Protocol ID
    -d       - Display EFI Driver Model related information
    -l       - Display information in the specified language
    -v       - Display verbose information

Note:
    1. When neither 'handle' nor 'prot_id' is specified, a list of all the
       device handles in the EFI environment is displayed.
    2. The '-d' option displays EFI Driver Model related information including
       parent handles, child handles, all drivers installed on the handle, etc.
    3. The '-v' option displays verbose information for the specified handle
       including all the protocols on the handle and their details.
    4. If the '-p' option is specified, all handles containing the specified
       protocol will be displayed. Otherwise, the 'handle' parameter has to be
       specified for display. In this case, the '-d' option will be enabled
       automatically if the '-v' option is not specified.

Examples:
  * To display all handles one screen at a time:
    Shell> dh -b
    Handle dump
      1: Image(DXE Core)
      2: FwVol FwFileSys FwVolBlk DevPath(MemMap(11:1B50000-1D4FFC8))
      3: Image(Ebc)
      4: DevPath(MemMap(11:1CA0000-1CB0000))
      5: Image(WinNtThunk)
      6: WinNtThunk DevPath(..76F3-11D4-BCEA-0080C73C8881))
      7: Image(WinNtBusDriver) DriverBinding
      ...

  * To display detailed information for handle 0x30:
    Shell> dh 30
    Handle 30 (01AF5308)
       IsaIo
         ROM Size......: 00000000
         ROM Location..: 00000000
         ISA Resource List :
           IO  : 000003F8-000003FF  Attr : 00000000
           INT : 00000004-00000000  Attr : 00000000

       dpath
          PNP Device Path for PnP
           HID A0341D0, UID 0
          Hardware Device Path for PCI
          PNP Device Path for PnP
           HID 50141D0, UID 0
       AsStr: 'Acpi(PNP0A03,0)/Pci(1F|0)/Acpi(PNP0501,0)'


  * To display all handles associated with the 'diskio' protocol:
    Shell> dh -p diskio
    Handle dump by protocol 'Diskio'
     15: DiskIo BlkIo DevPath(..i(3|1)/Ata(Secondary,Master))
     16: DiskIo BlkIo DevPath(..,1)/PCI(0|0)/Scsi(Pun0,Lun0))
     44: DiskIo BlkIo fs DevPath(..ABD0-01C0-507B-9E5F8078F531)) ESP
     45: DiskIo BlkIo fs DevPath(..i(Pun0,Lun0)/HD(Part4,SigG0)) ESP
     17: DiskIo BlkIo DevPath(..PCI(3|1)/Ata(Primary,Master))

  * To display all handles associated with the 'Image' protocol and break when
    the screen is full:
    Shell> dh -p Image -b
    Handle dump by protocol 'image'
      1: Image(DXE Core)
      5: Image(WinNtThunk)
      7: Image(WinNtBusDriver) DriverBinding
      8: Image(Metronome)
      A: Image(IsaBus) DriverBinding
      B: Image(WinNtConsole) DriverBinding
      ...