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!ioreslist

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The !ioreslist extension displays an IO_RESOURCE_REQUIREMENTS_LIST structure.

!ioreslist Address

Parameters

Address
Specifies the hexadecimal address of the IO_RESOURCE_REQUIREMENTS_LIST structure.

DLL

Kdexts.dll

Additional Information

See Plug and Play Debugging for applications of this extension command. For information about the IO_RESOURCE_REQUIREMENTS_LIST structure, see the Windows Driver Kit (WDK) documentation.

Remarks

Here is an example of the output from this extension:

kd> !ioreslist 0xe122b768

IoResList at 0xe122b768 : Interface 0x5  Bus 0  Slot 0xe
  Alternative 0 (Version 1.1)
    Preferred Descriptor 0 - Port (0x1) Device Exclusive (0x1)
      Flags (0x01) - PORT_IO
      0x000100 byte range with alignment 0x000100
      1000 - 0x10ff
    Alternative Descriptor 1 - Port (0x1) Device Exclusive (0x1)
      Flags (0x01) - PORT_IO
      0x000100 byte range with alignment 0x000100
      0 - 0xffffffff
    Descriptor 2 - DevicePrivate (0x81) Device Exclusive (0x1)
      Flags (0000) -
      Data:              : 0x1 0x0 0x0
    Preferred Descriptor 3 - Memory (0x3) Device Exclusive (0x1)
      Flags (0000) - READ_WRITE
      0x001000 byte range with alignment 0x001000
      40080000 - 0x40080fff
    Alternative Descriptor 4 - Memory (0x3) Device Exclusive (0x1)
      Flags (0000) - READ_WRITE
      0x001000 byte range with alignment 0x001000
      0 - 0xffffffff
    Descriptor 5 - DevicePrivate (0x81) Device Exclusive (0x1)
      Flags (0000) -
      Data:              : 0x1 0x1 0x0
    Descriptor 6 - Interrupt (0x2) Shared (0x3)
      Flags (0000) - LEVEL_SENSITIVE
      0xb - 0xb

The IO_RESOURCE_REQUIREMENTS_LIST contains information about:

  • Resource types

    There are four types of resources: I/O, Memory, IRQ, DMA.

  • Descriptors

    Each preferred setting has a "Preferred" descriptor and a number of "Alternative" descriptors.

This resource list contains the following requests:

  • I/O Ranges

    Prefers a range of 0x1000 to 0x10FF inclusive, but can use any 0x100 range between 0 and 0xFFFFFFFF, provided it is 0x100-aligned. (For example, 0x1100 to 0x11FF is acceptable.)

  • Memory

    Prefers a range of 0x40080000 to 0x40080FFF, but can use any range that is of size 0x1000, is 0x1000-aligned, and is located between 0 and 0xFFFFFFFF.

  • IRQ

    Must use IRQ 0xB.

Interrupts and DMA channels are represented as ranges with the same beginning and end.